Release 0.4.3

Fixes i2cp bug while connecting to remote router

README.md

@@ -1,39 +1,56 @@
 # MuWire - Easy Anonymous File-Sharing
 
-MuWire is an easy to use file-sharing program which offers anonymity using [I2P technology](http://geti2p.net).
+MuWire is an easy to use file-sharing program which offers anonymity using [I2P technology](http://geti2p.net).  It works on any platform Java works on, including Windows,MacOS,Linux.
 
 It is inspired by the LimeWire Gnutella client and developped by a former LimeWire developer.
 
-The project is in development.  You can find technical documentation in the "doc" folder.
+The current stable release - 0.4.0 is avaiable for download at https://muwire.com.  You can find technical documentation in the "doc" folder.
 
 ### Building
 
-You need JDK 8 or newer.  After installing that and setting up the appropriate paths, just type
+You need JRE 8 or newer.  After installing that and setting up the appropriate paths, just type
 
 ```
-./gradlew assemble 
+./gradlew clean assemble 
 ```
 
 If you want to run the unit tests, type
 ```
-./gradlew build
+./gradlew clean build
 ```
 
 Some of the UI tests will fail because they haven't been written yet :-/
 
 ### Running
 
-You need to have an I2P router up and running on the same machine.  After you build the application, look inside "gui/build/distributions".  Untar/unzip one of the "shadow" files and then run the jar contained inside.  
+You need to have an I2P router up and running on the same machine.  After you build the application, look inside "gui/build/distributions".  Untar/unzip one of the "shadow" files and then run the jar contained inside by typing "java -jar MuWire-x.y.z.jar" in a terminal or command prompt.  If you use a custom I2CP host and port, create a file $HOME/.MuWire/i2p.properties and put "i2cp.tcp.host=<host>" and "i2cp.tcp.port=<port>" in there.
 
-The first time you run MuWire it will ask you to select a nickname.  This nickname will be displayed with search results, so that others can verify the file was shared by you.
-
-At the moment there are very few nodes on the network, so you will see very few connections and search results.  It is best to leave MuWire running all the time, just like I2P.
+The first time you run MuWire it will ask you to select a nickname.  This nickname will be displayed with search results, so that others can verify the file was shared by you.  It is best to leave MuWire running all the time, just like I2P.
 
 
 ### Known bugs and limitations
 
-* Any shared files get re-hashed on startup
-* Sometimes the list of shared files gets lost 
 * Many UI features you would expect are not there yet
 
+### Quick FAQ
 
+* why is MuWire slow ?
+  
+  - too few sources you're downloading from
+  - you can increase the number of tunnels by using more tunnels via Options->I2P Inbound/Outbound Quantity 
+    the default is 4 and you could raise up to as high as 16 ( Caution !!!!)
+
+* my search is not returning (enough) results !
+
+  - search is keyword or hash based
+  - keywords and hash(es) are NOT regexed or wildcarded so they have to be complete
+    so searching for 'musi' will not return results with 'music' - you have to search for 'music'
+  - ALL keywords have to match 
+  - only use space for keyword separation
+  - if you already have the file in question it is not displayed ( can be changed via Options )
+
+* what's this right click -> 'Copy hash to clipboard' for ?
+
+  - if you have a specific file you wish to share or download you can use the hash as a unique identifier
+    to make sure you have exactly the right file.
+  - you can share this hash with others to ensure they are getting the right file

TODO.md

@@ -0,0 +1,40 @@
+# TODO List
+
+Not in any particular order yet
+
+### Big Items
+
+##### Bloom Filters
+
+This reduces query traffic by not sending last hop queries to peers that definitely do not have the file
+
+##### Two-tier Topology
+
+This helps with scalability
+
+##### Trust List Sharing
+
+For helping users make better decisions whom to trust
+
+##### Content Control Panel
+
+To allow every user to not route queries for content they do not like.  This is mostly GUI work, the backend part is simple
+
+##### Packaging With JRE, Embedded Router
+
+For ease of deployment for new users, and so that users do not need to run a separate I2P router
+
+##### Web UI, REST Interface, etc.
+
+Basically any non-gui non-cli user interface
+
+##### Metadata editing and search
+
+To enable parsing of metadata from known file types and the user editing it or adding manual metadata
+
+### Small Items
+
+* Wrapper of some kind for in-place upgrades
+* Download file sequentially
+* Unsharing of files
+* Multiple-selection download, Ctrl-A

cli/build.gradle

@@ -0,0 +1,22 @@
+buildscript {
+
+    repositories {
+        jcenter()
+        mavenLocal()
+    }
+
+    dependencies {
+        classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.4'
+    }
+}
+
+apply plugin : 'application'
+mainClassName = 'com.muwire.cli.Cli'
+apply plugin : 'com.github.johnrengelman.shadow'
+
+applicationDefaultJvmArgs = ['-Djava.util.logging.config.file=logging.properties']
+
+dependencies {
+    compile project(":core")
+}
+

cli/src/main/groovy/com/muwire/cli/Cli.groovy

@@ -0,0 +1,144 @@
+package com.muwire.cli
+
+import java.util.concurrent.CountDownLatch
+
+import com.muwire.core.Core
+import com.muwire.core.MuWireSettings
+import com.muwire.core.UILoadedEvent
+import com.muwire.core.connection.ConnectionAttemptStatus
+import com.muwire.core.connection.ConnectionEvent
+import com.muwire.core.connection.DisconnectionEvent
+import com.muwire.core.files.AllFilesLoadedEvent
+import com.muwire.core.files.FileHashedEvent
+import com.muwire.core.files.FileLoadedEvent
+import com.muwire.core.files.FileSharedEvent
+import com.muwire.core.upload.UploadEvent
+import com.muwire.core.upload.UploadFinishedEvent
+
+class Cli {
+    
+    public static void main(String[] args) {
+        def home = System.getProperty("user.home") + File.separator + ".MuWire"
+        home = new File(home)
+        if (!home.exists())
+            home.mkdirs()
+        
+        def propsFile = new File(home,"MuWire.properties")
+        if (!propsFile.exists()) {
+            println "create props file ${propsFile.getAbsoluteFile()} before launching MuWire"
+            System.exit(1)
+        }
+        
+        def props = new Properties()
+        propsFile.withInputStream { props.load(it) }
+        props = new MuWireSettings(props)
+        
+        Core core 
+        try {
+            core = new Core(props, home, "0.4.3")
+        } catch (Exception bad) {
+            bad.printStackTrace(System.out)
+            println "Failed to initialize core, exiting"
+            System.exit(1)
+        }
+
+                
+        
+        
+        def filesList
+        if (args.length == 0) {
+            println "Enter a file containing list of files to share"
+            def reader = new BufferedReader(new InputStreamReader(System.in))
+            filesList = reader.readLine()
+        } else 
+            filesList = args[0]
+        
+        Thread.sleep(1000)
+        println "loading shared files from $filesList"
+        
+        // listener for shared files
+        def sharedListener = new SharedListener()
+        core.eventBus.register(FileHashedEvent.class, sharedListener)
+        core.eventBus.register(FileLoadedEvent.class, sharedListener)
+        
+        // for connections
+        def connectionsListener = new ConnectionListener()
+        core.eventBus.register(ConnectionEvent.class, connectionsListener)
+        core.eventBus.register(DisconnectionEvent.class, connectionsListener)
+        
+        // for uploads
+        def uploadsListener = new UploadsListener()
+        core.eventBus.register(UploadEvent.class, uploadsListener)
+        core.eventBus.register(UploadFinishedEvent.class, uploadsListener)
+        
+        Timer timer = new Timer("status-printer", true)
+        timer.schedule({
+            println String.valueOf(new Date()) + " Connections $connectionsListener.connections Uploads $uploadsListener.uploads Shared $sharedListener.shared"
+        } as TimerTask, 60000, 60000)
+        
+        def latch = new CountDownLatch(1)
+        def fileLoader = new Object() {
+            public void onAllFilesLoadedEvent(AllFilesLoadedEvent e) {
+                latch.countDown()
+            }
+        }
+        core.eventBus.register(AllFilesLoadedEvent.class, fileLoader)
+        core.startServices()
+
+        core.eventBus.publish(new UILoadedEvent())        
+        println "waiting for files to load"
+        latch.await()
+        // now we begin
+        println "MuWire is ready"
+        
+        filesList = new File(filesList)
+        filesList.withReader { 
+            def toShare = it.readLine()
+            core.eventBus.publish(new FileSharedEvent(file : new File(toShare)))
+        }
+        Runtime.getRuntime().addShutdownHook({
+            println "shutting down.."
+            core.shutdown()
+            println "shutdown."
+        })
+        Thread.sleep(Integer.MAX_VALUE)
+    }
+    
+    static class ConnectionListener {
+        volatile int connections
+        public void onConnectionEvent(ConnectionEvent e) {
+            if (e.status == ConnectionAttemptStatus.SUCCESSFUL)
+                connections++
+        }
+        public void onDisconnectionEvent(DisconnectionEvent e) {
+            connections--
+        }
+    }
+    
+    static class UploadsListener {
+        volatile int uploads
+        public void onUploadEvent(UploadEvent e) {
+            uploads++
+            println String.valueOf(new Date()) + " Starting upload of ${e.uploader.file.getName()} to ${e.uploader.request.downloader.getHumanReadableName()}"
+        }
+        public void onUploadFinishedEvent(UploadFinishedEvent e) {
+            uploads--
+            println String.valueOf(new Date()) + " Finished upload of ${e.uploader.file.getName()} to ${e.uploader.request.downloader.getHumanReadableName()}"
+        }
+    }
+    
+    static class SharedListener {
+        volatile int shared
+        void onFileHashedEvent(FileHashedEvent e) {
+            if (e.error != null)
+                println "ERROR $e.error"
+            else {
+                println "Shared file : $e.sharedFile.file"
+                shared++
+            }
+        }
+        void onFileLoadedEvent(FileLoadedEvent e) {
+            shared++
+        }
+    }
+}

cli/src/main/groovy/com/muwire/cli/CliDownloader.groovy

@@ -0,0 +1,166 @@
+package com.muwire.cli
+
+import java.util.concurrent.ConcurrentHashMap
+import java.util.concurrent.CountDownLatch
+
+import com.muwire.core.Core
+import com.muwire.core.MuWireSettings
+import com.muwire.core.connection.ConnectionAttemptStatus
+import com.muwire.core.connection.ConnectionEvent
+import com.muwire.core.download.DownloadStartedEvent
+import com.muwire.core.download.Downloader
+import com.muwire.core.download.UIDownloadEvent
+import com.muwire.core.search.QueryEvent
+import com.muwire.core.search.SearchEvent
+import com.muwire.core.search.UIResultEvent
+
+import net.i2p.data.Base64
+
+class CliDownloader {
+    
+    private static final List<Downloader> downloaders = Collections.synchronizedList(new ArrayList<>())
+    private static final Map<UUID,ResultsHolder> resultsListeners = new ConcurrentHashMap<>()
+    
+    public static void main(String []args) {
+        def home = System.getProperty("user.home") + File.separator + ".MuWire"
+        home = new File(home)
+        if (!home.exists())
+            home.mkdirs()
+        
+        def propsFile = new File(home,"MuWire.properties")
+        if (!propsFile.exists()) {
+            println "create props file ${propsFile.getAbsoluteFile()} before launching MuWire"
+            System.exit(1)
+        }
+        
+        def props = new Properties()
+        propsFile.withInputStream { props.load(it) }
+        props = new MuWireSettings(props)
+        
+        def filesList
+        int connections
+        int resultWait
+        if (args.length != 3) {
+            println "Enter a file containing list of hashes of files to download, " + 
+                "how many connections you want before searching" +
+                "and how long to wait for results to arrive"
+                System.exit(1)
+        } else {
+            filesList = args[0]
+            connections = Integer.parseInt(args[1])
+            resultWait = Integer.parseInt(args[2])
+        }
+
+        Core core
+        try {
+            core = new Core(props, home, "0.4.3")
+        } catch (Exception bad) {
+            bad.printStackTrace(System.out)
+            println "Failed to initialize core, exiting"
+            System.exit(1)
+        }
+        
+        
+        def latch = new CountDownLatch(connections)
+        def connectionListener = new ConnectionWaiter(latch : latch)
+        core.eventBus.register(ConnectionEvent.class, connectionListener)
+        
+        core.startServices()
+        println "starting to wait until there are $connections connections"
+        latch.await()
+        
+        println "connected, searching for files"
+        
+        def file = new File(filesList)
+        file.eachLine {
+            String[] split = it.split(",")
+            UUID uuid = UUID.randomUUID()
+            core.eventBus.register(UIResultEvent.class, new ResultsListener(fileName : split[1]))
+            def hash = Base64.decode(split[0])
+            def searchEvent = new SearchEvent(searchHash : hash, uuid : uuid)
+            core.eventBus.publish(new QueryEvent(searchEvent : searchEvent, firstHop:true,
+                replyTo: core.me.destination, receivedOn : core.me.destination, originator: core.me)) 
+        }
+        
+        println "waiting for results to arrive"
+        Thread.sleep(resultWait * 1000)
+        
+        core.eventBus.register(DownloadStartedEvent.class, new DownloadListener())
+        resultsListeners.each { uuid, resultsListener ->
+            println "starting download of $resultsListener.fileName from ${resultsListener.getResults().size()} hosts"
+            File target = new File(resultsListener.fileName)
+            
+            core.eventBus.publish(new UIDownloadEvent(target : target, result : resultsListener.getResults()))
+        }
+        
+        Thread.sleep(1000)
+        
+        Timer timer = new Timer("stats-printer")
+        timer.schedule({
+            println "==== STATUS UPDATE ==="
+            downloaders.each {
+                int donePieces = it.donePieces()
+                int totalPieces = it.nPieces
+                int sources = it.activeWorkers.size()
+                def root = Base64.encode(it.infoHash.getRoot())
+                def state = it.getCurrentState()
+                println "file $it.file hash: $root progress: $donePieces/$totalPieces sources: $sources status: $state}"
+                it.resume()
+            }
+            println "==== END ==="
+        } as TimerTask, 60000, 60000)
+        
+        println "waiting for downloads to finish"
+        while(true) {
+            boolean allFinished = true
+            for (Downloader d : downloaders) {
+                allFinished &= d.getCurrentState() == Downloader.DownloadState.FINISHED
+            }
+            if (allFinished)
+                break
+            Thread.sleep(1000)
+        }
+        
+        println "all downloads finished"
+    }
+    
+    static class ResultsHolder {
+        final List<UIResultEvent> results = Collections.synchronizedList(new ArrayList<>())
+        String fileName
+        void add(UIResultEvent e) {
+            results.add(e)
+        }
+        List getResults() {
+            results
+        }
+    }
+    
+    static class ResultsListener {
+        UUID uuid
+        String fileName
+        public onUIResultEvent(UIResultEvent e) {
+            println "got a result for $fileName from ${e.sender.getHumanReadableName()}"
+            ResultsHolder listener = resultsListeners.get(e.uuid)
+            if (listener == null) {
+                listener = new ResultsHolder(fileName : fileName)
+                resultsListeners.put(e.uuid, listener)
+            }
+            listener.add(e)
+        }
+    }
+    
+    static class ConnectionWaiter {
+        CountDownLatch latch
+        public void onConnectionEvent(ConnectionEvent e) {
+            if (e.status == ConnectionAttemptStatus.SUCCESSFUL)
+                latch.countDown()
+        }
+    }
+    
+
+    static class DownloadListener {
+        public void onDownloadStartedEvent(DownloadStartedEvent e) {
+            downloaders.add(e.downloader)
+        }
+    }
+}

cli/src/main/groovy/com/muwire/cli/FileList.groovy

@@ -0,0 +1,23 @@
+package com.muwire.cli
+
+import com.muwire.core.util.DataUtil
+
+import groovy.json.JsonSlurper
+import net.i2p.data.Base64
+
+class FileList {
+    public static void main(String [] args) {
+        if (args.length < 1) {
+            println "pass files.json as argument"
+            System.exit(1)
+        }
+        
+        def slurper = new JsonSlurper()
+        File filesJson = new File(args[0])
+        filesJson.eachLine { 
+            def json = slurper.parseText(it)
+            String name = DataUtil.readi18nString(Base64.decode(json.file))
+            println "$name,$json.length,$json.pieceSize,$json.infoHash"
+        }
+    }
+}

core/build.gradle

@@ -2,6 +2,7 @@ apply plugin : 'application'
 mainClassName = 'com.muwire.core.Core'
 applicationDefaultJvmArgs = ['-Djava.util.logging.config.file=logging.properties']
 dependencies {
+    compile 'net.i2p:router:0.9.40'
     compile 'net.i2p.client:mstreaming:0.9.40'
     compile 'net.i2p.client:streaming:0.9.40'
 

core/src/main/groovy/com/muwire/core/Constants.groovy

@@ -9,7 +9,5 @@ class Constants {
     public static final int MAX_HEADER_SIZE = 0x1 << 14
     public static final int MAX_HEADERS = 16
     
-    public static final float DOWNLOAD_SEQUENTIAL_RATIO = 0.8f
-    
-    public static final String SPLIT_PATTERN = "[\\.,_-]"
+    public static final String SPLIT_PATTERN = "[\\*\\+\\-,\\.:;\\(\\)=_/\\\\\\!\\\"\\\'\\\$%\\|\\[\\]\\{\\}]"
 }

core/src/main/groovy/com/muwire/core/Core.groovy

@@ -1,6 +1,7 @@
 package com.muwire.core
 
 import java.nio.charset.StandardCharsets
+import java.util.concurrent.atomic.AtomicBoolean
 
 import com.muwire.core.connection.ConnectionAcceptor
 import com.muwire.core.connection.ConnectionEstablisher
@@ -12,7 +13,11 @@ import com.muwire.core.connection.I2PConnector
 import com.muwire.core.connection.LeafConnectionManager
 import com.muwire.core.connection.UltrapeerConnectionManager
 import com.muwire.core.download.DownloadManager
+import com.muwire.core.download.SourceDiscoveredEvent
+import com.muwire.core.download.UIDownloadCancelledEvent
 import com.muwire.core.download.UIDownloadEvent
+import com.muwire.core.download.UIDownloadPausedEvent
+import com.muwire.core.download.UIDownloadResumedEvent
 import com.muwire.core.files.FileDownloadedEvent
 import com.muwire.core.files.FileHashedEvent
 import com.muwire.core.files.FileHasher
@@ -22,14 +27,19 @@ import com.muwire.core.files.FileSharedEvent
 import com.muwire.core.files.FileUnsharedEvent
 import com.muwire.core.files.HasherService
 import com.muwire.core.files.PersisterService
+import com.muwire.core.files.AllFilesLoadedEvent
+import com.muwire.core.files.DirectoryUnsharedEvent
+import com.muwire.core.files.DirectoryWatcher
 import com.muwire.core.hostcache.CacheClient
 import com.muwire.core.hostcache.HostCache
 import com.muwire.core.hostcache.HostDiscoveredEvent
+import com.muwire.core.mesh.MeshManager
 import com.muwire.core.search.QueryEvent
 import com.muwire.core.search.ResultsEvent
 import com.muwire.core.search.ResultsSender
 import com.muwire.core.search.SearchEvent
 import com.muwire.core.search.SearchManager
+import com.muwire.core.search.UIResultBatchEvent
 import com.muwire.core.trust.TrustEvent
 import com.muwire.core.trust.TrustService
 import com.muwire.core.update.UpdateClient
@@ -43,6 +53,7 @@ import net.i2p.client.I2PSession
 import net.i2p.client.streaming.I2PSocketManager
 import net.i2p.client.streaming.I2PSocketManagerFactory
 import net.i2p.client.streaming.I2PSocketOptions
+import net.i2p.client.streaming.I2PSocketManager.DisconnectListener
 import net.i2p.crypto.DSAEngine
 import net.i2p.crypto.SigType
 import net.i2p.data.Destination
@@ -50,12 +61,17 @@ import net.i2p.data.PrivateKey
 import net.i2p.data.Signature
 import net.i2p.data.SigningPrivateKey
 
+import net.i2p.router.Router
+import net.i2p.router.RouterContext
+
 @Log
 public class Core {
     
     final EventBus eventBus
     final Persona me
     final File home
+    final Properties i2pOptions
+    final MuWireSettings muOptions
     
     private final TrustService trustService
     private final PersisterService persisterService
@@ -66,12 +82,65 @@ public class Core {
     private final ConnectionAcceptor connectionAcceptor
     private final ConnectionEstablisher connectionEstablisher
     private final HasherService hasherService
+    private final DownloadManager downloadManager
+    private final DirectoryWatcher directoryWatcher
+    final FileManager fileManager
+    final UploadManager uploadManager
+    
+    private final Router router
+    
+    final AtomicBoolean shutdown = new AtomicBoolean()
         
     public Core(MuWireSettings props, File home, String myVersion) {
         this.home = home		
-        log.info "Initializing I2P context"
-        I2PAppContext.getGlobalContext().logManager()
-        I2PAppContext.getGlobalContext()._logManager = new MuWireLogManager()
+        this.muOptions = props
+        
+        i2pOptions = new Properties()
+        def i2pOptionsFile = new File(home,"i2p.properties")
+        if (i2pOptionsFile.exists()) {
+            i2pOptionsFile.withInputStream { i2pOptions.load(it) }
+            
+            if (!i2pOptions.containsKey("inbound.nickname"))
+                i2pOptions["inbound.nickname"] = "MuWire"
+                if (!i2pOptions.containsKey("outbound.nickname"))
+                    i2pOptions["outbound.nickname"] = "MuWire"
+        } else {
+            i2pOptions["inbound.nickname"] = "MuWire"
+            i2pOptions["outbound.nickname"] = "MuWire"
+            i2pOptions["inbound.length"] = "3"
+            i2pOptions["inbound.quantity"] = "4"
+            i2pOptions["outbound.length"] = "3"
+            i2pOptions["outbound.quantity"] = "4"
+            i2pOptions["i2cp.tcp.host"] = "127.0.0.1"
+            i2pOptions["i2cp.tcp.port"] = "7654"
+            Random r = new Random()
+            int port = r.nextInt(60000) + 4000
+            i2pOptions["i2np.ntcp.port"] = String.valueOf(port)
+            i2pOptions["i2np.udp.port"] = String.valueOf(port)
+            i2pOptionsFile.withOutputStream { i2pOptions.store(it, "") }
+        }
+        
+        if (!props.embeddedRouter) {
+            log.info "Initializing I2P context"
+            I2PAppContext.getGlobalContext().logManager()
+            I2PAppContext.getGlobalContext()._logManager = new MuWireLogManager()
+            router = null
+        } else {
+            log.info("launching embedded router")
+            Properties routerProps = new Properties()
+            routerProps.setProperty("i2p.dir.config", home.getAbsolutePath())
+            routerProps.setProperty("i2np.inboundKBytesPerSecond", String.valueOf(props.inBw))
+            routerProps.setProperty("i2np.outboundKBytesPerSecond", String.valueOf(props.outBw))
+            routerProps.setProperty("i2cp.disableInterface", "true")
+            routerProps.setProperty("i2np.ntcp.port", i2pOptions["i2np.ntcp.port"])
+            routerProps.setProperty("i2np.udp.port", i2pOptions["i2np.udp.port"])
+            routerProps.setProperty("i2np.udp.internalPort", i2pOptions["i2np.udp.port"])
+            router = new Router(routerProps)
+            I2PAppContext.getGlobalContext().metaClass = new RouterContextMetaClass()
+            router.runRouter()
+            while(!router.isRunning())
+                Thread.sleep(100)
+        }
         
 		log.info("initializing I2P socket manager")
 		def i2pClient = new I2PClientFactory().createClient()
@@ -83,15 +152,16 @@ public class Core {
 			}
 		}
 		
-		def sysProps = System.getProperties().clone()
-		sysProps["inbound.nickname"] = "MuWire"
+        
+        // options like tunnel length and quantity
 		I2PSession i2pSession
 		I2PSocketManager socketManager
 		keyDat.withInputStream {
-			socketManager = new I2PSocketManagerFactory().createManager(it, sysProps)
+			socketManager = new I2PSocketManagerFactory().createManager(it, i2pOptions["i2cp.tcp.host"], i2pOptions["i2cp.tcp.port"].toInteger(), i2pOptions)
 		}
 		socketManager.getDefaultOptions().setReadTimeout(60000)
 		socketManager.getDefaultOptions().setConnectTimeout(30000)
+        socketManager.addDisconnectListener({eventBus.publish(new RouterDisconnectedEvent())} as DisconnectListener)
 		i2pSession = socketManager.getSession()
 		
         def destination = new Destination()
@@ -129,15 +199,21 @@ public class Core {
 		
 		
 		log.info "initializing file manager"
-		FileManager fileManager = new FileManager(eventBus)
+		fileManager = new FileManager(eventBus, props)
 		eventBus.register(FileHashedEvent.class, fileManager)
 		eventBus.register(FileLoadedEvent.class, fileManager)
 		eventBus.register(FileDownloadedEvent.class, fileManager)
 		eventBus.register(FileUnsharedEvent.class, fileManager)
 		eventBus.register(SearchEvent.class, fileManager)
+        eventBus.register(DirectoryUnsharedEvent.class, fileManager)
+        
+        log.info("initializing mesh manager")
+        MeshManager meshManager = new MeshManager(fileManager, home, props)
+        eventBus.register(SourceDiscoveredEvent.class, meshManager)
 		
 		log.info "initializing persistence service"
-		persisterService = new PersisterService(new File(home, "files.json"), eventBus, 5000, fileManager)
+		persisterService = new PersisterService(new File(home, "files.json"), eventBus, 15000, fileManager)
+        eventBus.register(UILoadedEvent.class, persisterService)
         
 		log.info("initializing host cache")
 		File hostStorage = new File(home, "hosts.json")
@@ -147,7 +223,8 @@ public class Core {
 		
 		log.info("initializing connection manager")
 		connectionManager = props.isLeaf() ? 
-			new LeafConnectionManager(eventBus, me, 3, hostCache) : new UltrapeerConnectionManager(eventBus, me, 512, 512, hostCache, trustService)
+			new LeafConnectionManager(eventBus, me, 3, hostCache, props) : 
+            new UltrapeerConnectionManager(eventBus, me, 512, 512, hostCache, trustService, props)
 		eventBus.register(TrustEvent.class, connectionManager)
 		eventBus.register(ConnectionEvent.class, connectionManager)
 		eventBus.register(DisconnectionEvent.class, connectionManager)
@@ -157,7 +234,9 @@ public class Core {
 		cacheClient = new CacheClient(eventBus,hostCache, connectionManager, i2pSession, props, 10000)
         
         log.info("initializing update client")
-        updateClient = new UpdateClient(eventBus, i2pSession, myVersion, props)
+        updateClient = new UpdateClient(eventBus, i2pSession, myVersion, props, fileManager, me)
+        eventBus.register(FileDownloadedEvent.class, updateClient)
+        eventBus.register(UIResultBatchEvent.class, updateClient)
         
 		log.info("initializing connector")
 		I2PConnector i2pConnector = new I2PConnector(socketManager)
@@ -171,23 +250,34 @@ public class Core {
 		eventBus.register(ResultsEvent.class, searchManager)
 		
         log.info("initializing download manager")
-        DownloadManager downloadManager = new DownloadManager(eventBus, i2pConnector, new File(home, "incompletes"), me)
+        downloadManager = new DownloadManager(eventBus, trustService, meshManager, props, i2pConnector, home, me)
         eventBus.register(UIDownloadEvent.class, downloadManager)
-        
+        eventBus.register(UILoadedEvent.class, downloadManager)
+        eventBus.register(FileDownloadedEvent.class, downloadManager)
+        eventBus.register(UIDownloadCancelledEvent.class, downloadManager)
+        eventBus.register(SourceDiscoveredEvent.class, downloadManager)
+        eventBus.register(UIDownloadPausedEvent.class, downloadManager)
+        eventBus.register(UIDownloadResumedEvent.class, downloadManager)
+                
         log.info("initializing upload manager")
-        UploadManager uploadManager = new UploadManager(eventBus, fileManager)
+        uploadManager = new UploadManager(eventBus, fileManager, meshManager, downloadManager)
         
+        log.info("initializing connection establisher")
+        connectionEstablisher = new ConnectionEstablisher(eventBus, i2pConnector, props, connectionManager, hostCache)
         
 		log.info("initializing acceptor")
 		I2PAcceptor i2pAcceptor = new I2PAcceptor(socketManager)
 		connectionAcceptor = new ConnectionAcceptor(eventBus, connectionManager, props, 
-            i2pAcceptor, hostCache, trustService, searchManager, uploadManager)
+            i2pAcceptor, hostCache, trustService, searchManager, uploadManager, connectionEstablisher)
 		
-        
-        connectionEstablisher = new ConnectionEstablisher(eventBus, i2pConnector, props, connectionManager, hostCache)
+        log.info("initializing directory watcher")
+        directoryWatcher = new DirectoryWatcher(eventBus, fileManager)
+        eventBus.register(FileSharedEvent.class, directoryWatcher)
+        eventBus.register(AllFilesLoadedEvent.class, directoryWatcher)
+        eventBus.register(DirectoryUnsharedEvent.class, directoryWatcher)
         
         log.info("initializing hasher service")
-        hasherService = new HasherService(new FileHasher(), eventBus)
+        hasherService = new HasherService(new FileHasher(), eventBus, fileManager)
         eventBus.register(FileSharedEvent.class, hasherService)
 	}
     
@@ -195,7 +285,6 @@ public class Core {
         hasherService.start()
         trustService.start()
         trustService.waitForLoad()
-        persisterService.start()
         hostCache.start()
         connectionManager.start()
         cacheClient.start()
@@ -206,9 +295,39 @@ public class Core {
     }
     
     public void shutdown() {
+        if (!shutdown.compareAndSet(false, true)) {
+            log.info("already shutting down")
+            return
+        }
+        log.info("shutting down download manageer")
+        downloadManager.shutdown()
+        log.info("shutting down connection acceeptor")
+        connectionAcceptor.stop()
+        log.info("shutting down connection establisher")
+        connectionEstablisher.stop()
+        log.info("shutting down directory watcher")
+        directoryWatcher.stop()
+        log.info("shutting down connection manager")
         connectionManager.shutdown()
+        if (router != null) {
+            log.info("shutting down embedded router")
+            router.shutdown(0)
+        }
     }
 
+    static class RouterContextMetaClass extends DelegatingMetaClass {
+        private final Object logManager = new MuWireLogManager()
+        RouterContextMetaClass() {
+            super(RouterContext.class)
+        }
+        
+        Object invokeMethod(Object object, String name, Object[] args) {
+            if (name == "logManager")
+                return logManager
+            super.invokeMethod(object, name, args)
+        }
+    }
+    
     static main(args) {
         def home = System.getProperty("user.home") + File.separator + ".MuWire"
         home = new File(home)
@@ -233,7 +352,7 @@ public class Core {
             }
         }
         
-        Core core = new Core(props, home, "0.0.7")
+        Core core = new Core(props, home, "0.4.3")
         core.startServices()
         
         // ... at the end, sleep or execute script

core/src/main/groovy/com/muwire/core/EventBus.groovy

@@ -3,6 +3,7 @@ package com.muwire.core
 import java.util.concurrent.CopyOnWriteArrayList
 import java.util.concurrent.Executor
 import java.util.concurrent.Executors
+import java.util.logging.Level
 
 import com.muwire.core.files.FileSharedEvent
 
@@ -23,14 +24,18 @@ class EventBus {
 	}
 	
 	private void publishInternal(Event e) {
-		log.fine "publishing event $e of type ${e.getClass().getSimpleName()}"
+		log.fine "publishing event $e of type ${e.getClass().getSimpleName()} event $e"
 		def currentHandlers
 		final def clazz = e.getClass()
 		synchronized(this) {
 			currentHandlers = handlers.getOrDefault(clazz, [])
 		}
 		currentHandlers.each {
-			it."on${clazz.getSimpleName()}"(e)
+            try {
+                it."on${clazz.getSimpleName()}"(e)
+            } catch (Exception bad) {
+                log.log(Level.SEVERE, "exception dispatching event",bad)
+            }
 		}
 	}
 	

core/src/main/groovy/com/muwire/core/MuWireSettings.groovy

@@ -1,6 +1,11 @@
 package com.muwire.core
 
+import java.util.stream.Collectors
+
 import com.muwire.core.hostcache.CrawlerResponse
+import com.muwire.core.util.DataUtil
+
+import net.i2p.data.Base64
 
 class MuWireSettings {
 	
@@ -8,10 +13,18 @@ class MuWireSettings {
     boolean allowUntrusted
     int downloadRetryInterval
     int updateCheckInterval
+    boolean autoDownloadUpdate
+    String updateType
     String nickname
     File downloadLocation
-    String sharedFiles
     CrawlerResponse crawlerResponse
+    boolean shareDownloadedFiles
+    Set<String> watchedDirectories
+    float downloadSequentialRatio
+    int hostClearInterval
+    int meshExpiration
+    boolean embeddedRouter
+    int inBw, outBw
     
 	MuWireSettings() {
         this(new Properties())
@@ -24,9 +37,24 @@ class MuWireSettings {
         nickname = props.getProperty("nickname","MuWireUser")
         downloadLocation = new File((String)props.getProperty("downloadLocation", 
             System.getProperty("user.home")))
-        sharedFiles = props.getProperty("sharedFiles")
-        downloadRetryInterval = Integer.parseInt(props.getProperty("downloadRetryInterval","15"))
-        updateCheckInterval = Integer.parseInt(props.getProperty("updateCheckInterval","36"))
+        downloadRetryInterval = Integer.parseInt(props.getProperty("downloadRetryInterval","1"))
+        updateCheckInterval = Integer.parseInt(props.getProperty("updateCheckInterval","24"))
+        autoDownloadUpdate = Boolean.parseBoolean(props.getProperty("autoDownloadUpdate","true"))
+        updateType = props.getProperty("updateType","jar")
+        shareDownloadedFiles = Boolean.parseBoolean(props.getProperty("shareDownloadedFiles","true"))
+        downloadSequentialRatio = Float.valueOf(props.getProperty("downloadSequentialRatio","0.8"))
+        hostClearInterval = Integer.valueOf(props.getProperty("hostClearInterval","60"))
+        meshExpiration = Integer.valueOf(props.getProperty("meshExpiration","60"))
+        embeddedRouter = Boolean.valueOf(props.getProperty("embeddedRouter","false"))
+        inBw = Integer.valueOf(props.getProperty("inBw","256"))
+        outBw = Integer.valueOf(props.getProperty("outBw","128"))
+        
+        watchedDirectories = new HashSet<>()
+        if (props.containsKey("watchedDirectories")) {
+            String[] encoded = props.getProperty("watchedDirectories").split(",")
+            encoded.each { watchedDirectories << DataUtil.readi18nString(Base64.decode(it)) }
+        }
+        
 	}
     
     void write(OutputStream out) throws IOException {
@@ -38,8 +66,23 @@ class MuWireSettings {
         props.setProperty("downloadLocation", downloadLocation.getAbsolutePath())
         props.setProperty("downloadRetryInterval", String.valueOf(downloadRetryInterval))
         props.setProperty("updateCheckInterval", String.valueOf(updateCheckInterval))
-        if (sharedFiles != null)
-            props.setProperty("sharedFiles", sharedFiles)
+        props.setProperty("autoDownloadUpdate", String.valueOf(autoDownloadUpdate))
+        props.setProperty("updateType",updateType)
+        props.setProperty("shareDownloadedFiles", String.valueOf(shareDownloadedFiles))
+        props.setProperty("downloadSequentialRatio", String.valueOf(downloadSequentialRatio))
+        props.setProperty("hostClearInterval", String.valueOf(hostClearInterval))
+        props.setProperty("meshExpiration", String.valueOf(meshExpiration))
+        props.setProperty("embeddedRouter", String.valueOf(embeddedRouter))
+        props.setProperty("inBw", String.valueOf(inBw))
+        props.setProperty("outBw", String.valueOf(outBw))
+        
+        if (!watchedDirectories.isEmpty()) {
+            String encoded = watchedDirectories.stream().
+                map({Base64.encode(DataUtil.encodei18nString(it))}).
+                collect(Collectors.joining(","))
+            props.setProperty("watchedDirectories", encoded)
+        }
+        
         props.store(out, "")
     }
 

core/src/main/groovy/com/muwire/core/RouterDisconnectedEvent.groovy

@@ -0,0 +1,4 @@
+package com.muwire.core
+
+class RouterDisconnectedEvent extends Event {
+}

core/src/main/groovy/com/muwire/core/UILoadedEvent.groovy

@@ -0,0 +1,4 @@
+package com.muwire.core
+
+class UILoadedEvent extends Event {
+}

core/src/main/groovy/com/muwire/core/connection/Connection.groovy

@@ -6,6 +6,7 @@ import java.util.concurrent.atomic.AtomicBoolean
 import java.util.logging.Level
 
 import com.muwire.core.EventBus
+import com.muwire.core.MuWireSettings
 import com.muwire.core.Persona
 import com.muwire.core.hostcache.HostCache
 import com.muwire.core.hostcache.HostDiscoveredEvent
@@ -26,7 +27,8 @@ abstract class Connection implements Closeable {
 	final boolean incoming
 	final HostCache hostCache
     final TrustService trustService
-	
+    final MuWireSettings settings
+    	
 	private final AtomicBoolean running = new AtomicBoolean()
 	private final BlockingQueue messages = new LinkedBlockingQueue()
 	private final Thread reader, writer
@@ -35,12 +37,14 @@ abstract class Connection implements Closeable {
 	
 	long lastPingSentTime, lastPongReceivedTime
 	
-	Connection(EventBus eventBus, Endpoint endpoint, boolean incoming, HostCache hostCache, TrustService trustService) {
+	Connection(EventBus eventBus, Endpoint endpoint, boolean incoming, 
+        HostCache hostCache, TrustService trustService, MuWireSettings settings) {
 		this.eventBus = eventBus
 		this.incoming = incoming
 		this.endpoint = endpoint
 		this.hostCache = hostCache
         this.trustService = trustService
+        this.settings = settings
 		
 		this.name = endpoint.destination.toBase32().substring(0,8)
 		
@@ -72,9 +76,9 @@ abstract class Connection implements Closeable {
 			return
 		}
         log.info("closing $name")
-        endpoint.close()
 		reader.interrupt()
 		writer.interrupt()
+		endpoint.close()
 		eventBus.publish(new DisconnectionEvent(destination: endpoint.destination))
 	}
 	
@@ -123,6 +127,9 @@ abstract class Connection implements Closeable {
         query.uuid = e.searchEvent.getUuid()
         query.firstHop = e.firstHop
         query.keywords = e.searchEvent.getSearchTerms()
+        query.oobInfohash = e.searchEvent.oobInfohash
+        if (e.searchEvent.searchHash != null)
+            query.infohash = Base64.encode(e.searchEvent.searchHash)
         query.replyTo = e.replyTo.toBase64()
         if (e.originator != null)
             query.originator = e.originator.toBase64()
@@ -151,15 +158,22 @@ abstract class Connection implements Closeable {
     
     protected void handleSearch(def search) {
         UUID uuid = UUID.fromString(search.uuid)
-        if (search.infohash != null)
+        byte [] infohash = null
+        if (search.infohash != null) {
             search.keywords = null
+            infohash = Base64.decode(search.infohash)
+        }
             
         Destination replyTo = new Destination(search.replyTo)
-        if (trustService.getLevel(replyTo) == TrustLevel.DISTRUSTED) {
+        TrustLevel trustLevel = trustService.getLevel(replyTo)
+        if (trustLevel == TrustLevel.DISTRUSTED) {
             log.info "dropping search from distrusted peer"
             return
         }
-        // TODO: add option to respond only to trusted peers
+        if (trustLevel == TrustLevel.NEUTRAL && !settings.allowUntrusted()) {
+            log.info("dropping search from neutral peer")
+            return
+        }
         
         Persona originator = null
         if (search.originator != null) {
@@ -170,10 +184,14 @@ abstract class Connection implements Closeable {
             }
         }
         
+        boolean oob = false
+        if (search.oobInfohash != null)
+            oob = search.oobInfohash
         
         SearchEvent searchEvent = new SearchEvent(searchTerms : search.keywords,
-                                            searchHash : search.infohash,
-                                            uuid : uuid)
+                                            searchHash : infohash,
+                                            uuid : uuid,
+                                            oobInfohash : oob)
         QueryEvent event = new QueryEvent ( searchEvent : searchEvent,
                                             replyTo : replyTo,
                                             originator : originator,

core/src/main/groovy/com/muwire/core/connection/ConnectionAcceptor.groovy

@@ -17,6 +17,8 @@ import com.muwire.core.upload.UploadManager
 import com.muwire.core.search.InvalidSearchResultException
 import com.muwire.core.search.ResultsParser
 import com.muwire.core.search.SearchManager
+import com.muwire.core.search.UIResultBatchEvent
+import com.muwire.core.search.UIResultEvent
 import com.muwire.core.search.UnexpectedResultsException
 
 import groovy.json.JsonOutput
@@ -34,13 +36,17 @@ class ConnectionAcceptor {
 	final TrustService trustService
     final SearchManager searchManager 
     final UploadManager uploadManager
+    final ConnectionEstablisher establisher
 	
 	final ExecutorService acceptorThread
 	final ExecutorService handshakerThreads
+    
+    private volatile shutdown
 	
 	ConnectionAcceptor(EventBus eventBus, UltrapeerConnectionManager manager,
 		MuWireSettings settings, I2PAcceptor acceptor, HostCache hostCache,
-		TrustService trustService, SearchManager searchManager, UploadManager uploadManager) {
+		TrustService trustService, SearchManager searchManager, UploadManager uploadManager,
+        ConnectionEstablisher establisher) {
 		this.eventBus = eventBus
 		this.manager = manager
 		this.settings = settings
@@ -49,7 +55,8 @@ class ConnectionAcceptor {
 		this.trustService = trustService
         this.searchManager = searchManager
         this.uploadManager = uploadManager
-		
+		this.establisher = establisher
+        
 		acceptorThread = Executors.newSingleThreadExecutor { r -> 
 			def rv = new Thread(r)
 			rv.setDaemon(true)
@@ -70,11 +77,13 @@ class ConnectionAcceptor {
 	}
 	
 	void stop() {
+        shutdown = true
 		acceptorThread.shutdownNow()
 		handshakerThreads.shutdownNow()
 	}
 	
 	private void acceptLoop() {
+        try {
 		while(true) {
 			def incoming = acceptor.accept()
 			log.info("accepted connection from ${incoming.destination.toBase32()}")
@@ -90,6 +99,11 @@ class ConnectionAcceptor {
 			}
 			handshakerThreads.execute({processIncoming(incoming)} as Runnable)
 		}
+        } catch (Exception e) {
+            log.log(Level.WARNING, "exception in accept loop",e)
+            if (!shutdown)
+                throw e
+        }
 	}
 	
 	private void processIncoming(Endpoint e) {
@@ -105,6 +119,9 @@ class ConnectionAcceptor {
 				case (byte)'G':
 					processGET(e)
 					break
+                case (byte)'H':
+                    processHashList(e)
+                    break
                 case (byte)'P':
                     processPOST(e)
                     break
@@ -140,7 +157,9 @@ class ConnectionAcceptor {
     }
 
 	private void handleIncoming(Endpoint e, boolean leaf) {
-		boolean accept = !manager.isConnected(e.destination) && (leaf ? manager.hasLeafSlots() : manager.hasPeerSlots())
+		boolean accept = !manager.isConnected(e.destination) && 
+            !establisher.isInProgress(e.destination) &&
+            (leaf ? manager.hasLeafSlots() : manager.hasPeerSlots())
 		if (accept) {
 			log.info("accepting connection, leaf:$leaf")
 			e.outputStream.write("OK".bytes)
@@ -173,9 +192,18 @@ class ConnectionAcceptor {
         dis.readFully(et)
         if (et != "ET ".getBytes(StandardCharsets.US_ASCII))
             throw new IOException("Invalid GET connection")
-        uploadManager.processEndpoint(e)
+        uploadManager.processGET(e)
 	}
     
+    private void processHashList(Endpoint e) {
+        byte[] ashList = new byte[8]
+        final DataInputStream dis = new DataInputStream(e.getInputStream())
+        dis.readFully(ashList)
+        if (ashList != "ASHLIST ".getBytes(StandardCharsets.US_ASCII))
+            throw new IOException("Invalid HASHLIST connection")
+        uploadManager.processHashList(e)
+    }
+    
     private void processPOST(final Endpoint e) throws IOException {
         byte [] ost = new byte[4]
         final DataInputStream dis = new DataInputStream(e.getInputStream())
@@ -199,13 +227,15 @@ class ConnectionAcceptor {
             if (sender.destination != e.getDestination())
                 throw new IOException("Sender destination mismatch expected $e.getDestination(), got $sender.destination")
             int nResults = dis.readUnsignedShort()
+            UIResultEvent[] results = new UIResultEvent[nResults]
             for (int i = 0; i < nResults; i++) {
                 int jsonSize = dis.readUnsignedShort()
                 byte [] payload = new byte[jsonSize]
                 dis.readFully(payload)
                 def json = slurper.parse(payload)
-                eventBus.publish(ResultsParser.parse(sender, resultsUUID, json))
+                results[i] = ResultsParser.parse(sender, resultsUUID, json)
             }
+            eventBus.publish(new UIResultBatchEvent(uuid: resultsUUID, results: results))
         } catch (IOException | UnexpectedResultsException | InvalidSearchResultException bad) {
             log.log(Level.WARNING, "failed to process POST", bad)
         } finally {

core/src/main/groovy/com/muwire/core/connection/ConnectionEstablisher.groovy

@@ -35,6 +35,8 @@ class ConnectionEstablisher {
 	
 	final Set inProgress = new ConcurrentHashSet()
 	
+    ConnectionEstablisher(){}
+    
 	ConnectionEstablisher(EventBus eventBus, I2PConnector i2pConnector, MuWireSettings settings,
 		ConnectionManager connectionManager, HostCache hostCache) {
 		this.eventBus = eventBus
@@ -176,4 +178,8 @@ class ConnectionEstablisher {
 			e.close()
 		}
 	}
+    
+    public boolean isInProgress(Destination d) {
+        inProgress.contains(d)
+    }
 }

core/src/main/groovy/com/muwire/core/connection/ConnectionManager.groovy

@@ -1,6 +1,7 @@
 package com.muwire.core.connection
 
 import com.muwire.core.EventBus
+import com.muwire.core.MuWireSettings
 import com.muwire.core.Persona
 import com.muwire.core.hostcache.HostCache
 import com.muwire.core.search.QueryEvent
@@ -19,13 +20,15 @@ abstract class ConnectionManager {
 	
 	protected final HostCache hostCache
     protected final Persona me
+    protected final MuWireSettings settings
 	
 	ConnectionManager() {}
 	
-	ConnectionManager(EventBus eventBus, Persona me, HostCache hostCache) {
+	ConnectionManager(EventBus eventBus, Persona me, HostCache hostCache, MuWireSettings settings) {
 		this.eventBus = eventBus
         this.me = me
 		this.hostCache = hostCache
+        this.settings = settings
 		this.timer = new Timer("connections-pinger",true)
 	}
 	

core/src/main/groovy/com/muwire/core/connection/Endpoint.groovy

@@ -1,6 +1,7 @@
 package com.muwire.core.connection
 
 import java.util.concurrent.atomic.AtomicBoolean
+import java.util.logging.Level
 
 import groovy.util.logging.Log
 import net.i2p.data.Destination
@@ -24,7 +25,7 @@ class Endpoint implements Closeable {
 	@Override
 	public void close() {
 		if (!closed.compareAndSet(false, true)) {
-			log.warning("Close loop detected for ${destination.toBase32()}", new Exception())
+			log.log(Level.WARNING,"Close loop detected for ${destination.toBase32()}", new Exception())
 			return
 		}
 		if (inputStream != null) {
@@ -34,7 +35,7 @@ class Endpoint implements Closeable {
 			try {outputStream.close()} catch (Exception ignore) {}
 		}
         if (toClose != null) {
-            try {toClose.close()} catch (Exception ignore) {}
+            try {toClose.reset()} catch (Exception ignore) {}
         }
 	}
 	

core/src/main/groovy/com/muwire/core/connection/LeafConnection.groovy

@@ -4,6 +4,7 @@ import java.io.InputStream
 import java.io.OutputStream
 
 import com.muwire.core.EventBus
+import com.muwire.core.MuWireSettings
 import com.muwire.core.hostcache.HostCache
 import com.muwire.core.trust.TrustService
 
@@ -16,8 +17,9 @@ import net.i2p.data.Destination
  */
 class LeafConnection extends Connection {
 
-	public LeafConnection(EventBus eventBus, Endpoint endpoint, HostCache hostCache, TrustService trustService) {
-		super(eventBus, endpoint, true, hostCache, trustService);
+	public LeafConnection(EventBus eventBus, Endpoint endpoint, HostCache hostCache, 
+        TrustService trustService, MuWireSettings settings) {
+		super(eventBus, endpoint, true, hostCache, trustService, settings);
 	}
 
 	@Override

core/src/main/groovy/com/muwire/core/connection/LeafConnectionManager.groovy

@@ -3,6 +3,7 @@ package com.muwire.core.connection
 import java.util.concurrent.ConcurrentHashMap
 
 import com.muwire.core.EventBus
+import com.muwire.core.MuWireSettings
 import com.muwire.core.Persona
 import com.muwire.core.hostcache.HostCache
 import com.muwire.core.search.QueryEvent
@@ -17,8 +18,9 @@ class LeafConnectionManager extends ConnectionManager {
 	
 	final Map<Destination, UltrapeerConnection> connections = new ConcurrentHashMap()
 	
-	public LeafConnectionManager(EventBus eventBus, Persona me, int maxConnections, HostCache hostCache) {
-		super(eventBus, me, hostCache)
+	public LeafConnectionManager(EventBus eventBus, Persona me, int maxConnections, 
+        HostCache hostCache, MuWireSettings settings) {
+		super(eventBus, me, hostCache, settings)
 		this.maxConnections = maxConnections
 	}
 	

core/src/main/groovy/com/muwire/core/connection/PeerConnection.groovy

@@ -4,6 +4,7 @@ import java.io.InputStream
 import java.io.OutputStream
 
 import com.muwire.core.EventBus
+import com.muwire.core.MuWireSettings
 import com.muwire.core.hostcache.HostCache
 import com.muwire.core.trust.TrustService
 import com.muwire.core.util.DataUtil
@@ -29,8 +30,9 @@ class PeerConnection extends Connection {
 	private final JsonSlurper slurper = new JsonSlurper()
 
 	public PeerConnection(EventBus eventBus, Endpoint endpoint,
-			boolean incoming, HostCache hostCache, TrustService trustService) {
-		super(eventBus, endpoint, incoming, hostCache, trustService)
+			boolean incoming, HostCache hostCache, TrustService trustService,
+            MuWireSettings settings) {
+		super(eventBus, endpoint, incoming, hostCache, trustService, settings)
 		this.dis = new DataInputStream(endpoint.inputStream)
 		this.dos = new DataOutputStream(endpoint.outputStream)
 	}

core/src/main/groovy/com/muwire/core/connection/UltrapeerConnectionManager.groovy

@@ -4,6 +4,7 @@ import java.util.Collection
 import java.util.concurrent.ConcurrentHashMap
 
 import com.muwire.core.EventBus
+import com.muwire.core.MuWireSettings
 import com.muwire.core.Persona
 import com.muwire.core.hostcache.HostCache
 import com.muwire.core.search.QueryEvent
@@ -17,15 +18,15 @@ class UltrapeerConnectionManager extends ConnectionManager {
 	
 	final int maxPeers, maxLeafs
     final TrustService trustService
-	
+    
 	final Map<Destination, PeerConnection> peerConnections = new ConcurrentHashMap()
 	final Map<Destination, LeafConnection> leafConnections = new ConcurrentHashMap()
     
 	UltrapeerConnectionManager() {}
 
 	public UltrapeerConnectionManager(EventBus eventBus, Persona me, int maxPeers, int maxLeafs, 
-        HostCache hostCache, TrustService trustService) {
-		super(eventBus, me, hostCache)
+        HostCache hostCache, TrustService trustService, MuWireSettings settings) {
+		super(eventBus, me, hostCache, settings)
 		this.maxPeers = maxPeers
 		this.maxLeafs = maxLeafs
         this.trustService = trustService
@@ -85,8 +86,8 @@ class UltrapeerConnectionManager extends ConnectionManager {
 			return
 		
 		Connection c = e.leaf ? 
-			new LeafConnection(eventBus, e.endpoint, hostCache, trustService) : 
-			new PeerConnection(eventBus, e.endpoint, e.incoming, hostCache, trustService)
+			new LeafConnection(eventBus, e.endpoint, hostCache, trustService, settings) : 
+			new PeerConnection(eventBus, e.endpoint, e.incoming, hostCache, trustService, settings)
 		def map = e.leaf ? leafConnections : peerConnections
 		map.put(e.endpoint.destination, c)
 		c.start()
@@ -103,8 +104,8 @@ class UltrapeerConnectionManager extends ConnectionManager {
     
     @Override
     void shutdown() {
-        peerConnections.each {k,v -> v.close() }
-        leafConnections.each {k,v -> v.close() }
+        peerConnections.values().stream().parallel().forEach({v -> v.close()})
+        leafConnections.values().stream().parallel().forEach({v -> v.close()})
         peerConnections.clear()
         leafConnections.clear()
     }

core/src/main/groovy/com/muwire/core/download/DownloadManager.groovy

@@ -1,28 +1,53 @@
 package com.muwire.core.download
 
 import com.muwire.core.connection.I2PConnector
+import com.muwire.core.files.FileDownloadedEvent
+import com.muwire.core.files.FileHasher
+import com.muwire.core.mesh.Mesh
+import com.muwire.core.mesh.MeshManager
+import com.muwire.core.trust.TrustLevel
+import com.muwire.core.trust.TrustService
+import com.muwire.core.util.DataUtil
 
+import groovy.json.JsonBuilder
+import groovy.json.JsonOutput
+import groovy.json.JsonSlurper
 import net.i2p.data.Base64
 import net.i2p.data.Destination
+import net.i2p.util.ConcurrentHashSet
 
 import com.muwire.core.EventBus
+import com.muwire.core.InfoHash
+import com.muwire.core.MuWireSettings
 import com.muwire.core.Persona
+import com.muwire.core.UILoadedEvent
 
+import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.Executor
 import java.util.concurrent.Executors
 
 public class DownloadManager {
     
     private final EventBus eventBus
+    private final TrustService trustService
+    private final MeshManager meshManager
+    private final MuWireSettings muSettings
     private final I2PConnector connector
     private final Executor executor
-    private final File incompletes
+    private final File incompletes, home
     private final Persona me
     
-    public DownloadManager(EventBus eventBus, I2PConnector connector, File incompletes, Persona me) {
+    private final Map<InfoHash, Downloader> downloaders = new ConcurrentHashMap<>()
+    
+    public DownloadManager(EventBus eventBus, TrustService trustService, MeshManager meshManager, MuWireSettings muSettings,
+        I2PConnector connector, File home, Persona me) {
         this.eventBus = eventBus
+        this.trustService = trustService
+        this.meshManager = meshManager
+        this.muSettings = muSettings
         this.connector = connector
-        this.incompletes = incompletes
+        this.incompletes = new File(home,"incompletes")
+        this.home = home
         this.me = me
         
         incompletes.mkdir()
@@ -46,15 +71,131 @@ public class DownloadManager {
         e.result.each { 
             destinations.add(it.sender.destination)
         }
+        destinations.addAll(e.sources)
+        destinations.remove(me.destination)
         
-        def downloader = new Downloader(this, me, e.target, size,
+        Pieces pieces = getPieces(infohash, size, pieceSize)
+        
+        def downloader = new Downloader(eventBus, this, me, e.target, size,
             infohash, pieceSize, connector, destinations,
-            incompletes)
+            incompletes, pieces)
+        downloaders.put(infohash, downloader)
+        persistDownloaders()
         executor.execute({downloader.download()} as Runnable)
         eventBus.publish(new DownloadStartedEvent(downloader : downloader))
     }
     
+    public void onUIDownloadCancelledEvent(UIDownloadCancelledEvent e) {
+        downloaders.remove(e.downloader.infoHash)
+        persistDownloaders()
+    }
+    
+    public void onUIDownloadPausedEvent(UIDownloadPausedEvent e) {
+        persistDownloaders()
+    }
+    
+    public void onUIDownloadResumedEvent(UIDownloadResumedEvent e) {
+        persistDownloaders()
+    }
+    
     void resume(Downloader downloader) {
         executor.execute({downloader.download() as Runnable})
     }
+    
+    void onUILoadedEvent(UILoadedEvent e) {
+        File downloadsFile = new File(home, "downloads.json")
+        if (!downloadsFile.exists())
+            return
+        def slurper = new JsonSlurper()
+        downloadsFile.eachLine {
+            def json = slurper.parseText(it)
+            File file = new File(DataUtil.readi18nString(Base64.decode(json.file)))
+            def destinations = new HashSet<>()
+            json.destinations.each { destination -> 
+                destinations.add new Destination(destination)
+            }
+            InfoHash infoHash
+            if (json.hashList != null) {
+                byte[] hashList = Base64.decode(json.hashList)
+                infoHash = InfoHash.fromHashList(hashList)
+            } else {
+                byte [] root = Base64.decode(json.hashRoot)
+                infoHash = new InfoHash(root)
+            }
+            
+            Pieces pieces = getPieces(infoHash, (long)json.length, json.pieceSizePow2)
+            
+            def downloader = new Downloader(eventBus, this, me, file, (long)json.length,
+                infoHash, json.pieceSizePow2, connector, destinations, incompletes, pieces)
+            if (json.paused != null)
+                downloader.paused = json.paused
+            downloaders.put(infoHash, downloader)
+            downloader.readPieces()
+            if (!downloader.paused)
+                downloader.download()
+            eventBus.publish(new DownloadStartedEvent(downloader : downloader))
+        }
+    }
+    
+    private Pieces getPieces(InfoHash infoHash, long length, int pieceSizePow2) {
+        int pieceSize = 0x1 << pieceSizePow2
+        int nPieces = (int)(length / pieceSize)
+        if (length % pieceSize != 0)
+            nPieces++
+        Mesh mesh = meshManager.getOrCreate(infoHash, nPieces)
+        mesh.pieces
+    }
+    
+    void onSourceDiscoveredEvent(SourceDiscoveredEvent e) {
+        Downloader downloader = downloaders.get(e.infoHash)
+        if (downloader == null)
+            return
+        boolean ok = false
+        switch(trustService.getLevel(e.source.destination)) {
+            case TrustLevel.TRUSTED: ok = true; break
+            case TrustLevel.NEUTRAL: ok = muSettings.allowUntrusted; break
+            case TrustLevel.DISTRUSTED: ok = false; break
+        }
+        
+        if (ok)
+            downloader.addSource(e.source.destination)
+    }
+    
+    void onFileDownloadedEvent(FileDownloadedEvent e) {
+        downloaders.remove(e.downloader.infoHash)
+        persistDownloaders()
+    }
+    
+    private void persistDownloaders() {
+        File downloadsFile = new File(home,"downloads.json")
+        downloadsFile.withPrintWriter { writer -> 
+            downloaders.values().each { downloader ->
+                if (!downloader.cancelled) {
+                    def json = [:]
+                    json.file = Base64.encode(DataUtil.encodei18nString(downloader.file.getAbsolutePath()))
+                    json.length = downloader.length
+                    json.pieceSizePow2 = downloader.pieceSizePow2
+                    def destinations = []
+                    downloader.destinations.each {
+                        destinations << it.toBase64()
+                    }
+                    json.destinations = destinations
+                    
+                    InfoHash infoHash = downloader.getInfoHash()
+                    if (infoHash.hashList != null)
+                        json.hashList = Base64.encode(infoHash.hashList)
+                    else
+                        json.hashRoot = Base64.encode(infoHash.getRoot())
+                        
+                    json.paused = downloader.paused
+                    writer.println(JsonOutput.toJson(json))
+                }
+            }
+        }
+    }
+    
+    public void shutdown() {
+        downloaders.values().each { it.stop() }
+        Downloader.executorService.shutdownNow()
+    }
 }

core/src/main/groovy/com/muwire/core/download/DownloadSession.groovy

@@ -3,8 +3,12 @@ package com.muwire.core.download;
 import net.i2p.data.Base64
 
 import com.muwire.core.Constants
+import com.muwire.core.EventBus
 import com.muwire.core.InfoHash
+import com.muwire.core.Persona
 import com.muwire.core.connection.Endpoint
+import com.muwire.core.util.DataUtil
+
 import static com.muwire.core.util.DataUtil.readTillRN
 
 import groovy.util.logging.Log
@@ -16,36 +20,40 @@ import java.nio.file.Files
 import java.nio.file.StandardOpenOption
 import java.security.MessageDigest
 import java.security.NoSuchAlgorithmException
+import java.util.logging.Level
 
 @Log
 class DownloadSession {
     
     private static int SAMPLES = 10
     
+    private final EventBus eventBus
     private final String meB64
-    private final Pieces downloaded, claimed
+    private final Pieces pieces
     private final InfoHash infoHash
     private final Endpoint endpoint
     private final File file
     private final int pieceSize
     private final long fileLength
+    private final Set<Integer> available
     private final MessageDigest digest
     
-    private final ArrayDeque<Long> timestamps = new ArrayDeque<>(SAMPLES)
-    private final ArrayDeque<Integer> reads = new ArrayDeque<>(SAMPLES)
+    private final LinkedList<Long> timestamps = new LinkedList<>()
+    private final LinkedList<Integer> reads = new LinkedList<>()
     
     private ByteBuffer mapped
     
-    DownloadSession(String meB64, Pieces downloaded, Pieces claimed, InfoHash infoHash, Endpoint endpoint, File file, 
-        int pieceSize, long fileLength) {
+    DownloadSession(EventBus eventBus, String meB64, Pieces pieces, InfoHash infoHash, Endpoint endpoint, File file, 
+        int pieceSize, long fileLength, Set<Integer> available) {
+        this.eventBus = eventBus
         this.meB64 = meB64
-        this.downloaded = downloaded
-        this.claimed = claimed
+        this.pieces = pieces
         this.endpoint = endpoint
         this.infoHash = infoHash
         this.file = file
         this.pieceSize = pieceSize
         this.fileLength = fileLength
+        this.available = available
         try {
             digest = MessageDigest.getInstance("SHA-256")
         } catch (NoSuchAlgorithmException impossible) {
@@ -64,19 +72,14 @@ class DownloadSession {
         InputStream is = endpoint.getInputStream()
         
         int piece
-        while(true) {
-            piece = downloaded.getRandomPiece()
-            if (claimed.isMarked(piece)) {
-                if (downloaded.donePieces() + claimed.donePieces() == downloaded.nPieces) {
-                    log.info("all pieces claimed")
-                    return false
-                }
-                continue
-            }
-            break
-        }
-        claimed.markDownloaded(piece)
-        
+        if (available.isEmpty())
+            piece = pieces.claim()
+        else
+            piece = pieces.claim(new HashSet<>(available))
+        if (piece == -1)
+            return false
+        boolean unclaim = true
+            
         log.info("will download piece $piece")
         
         long start = piece * pieceSize
@@ -85,91 +88,129 @@ class DownloadSession {
         
         String root = Base64.encode(infoHash.getRoot())
                 
-        FileChannel channel
         try {
             os.write("GET $root\r\n".getBytes(StandardCharsets.US_ASCII))
             os.write("Range: $start-$end\r\n".getBytes(StandardCharsets.US_ASCII))
-            os.write("X-Persona: $meB64\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+            os.write("X-Persona: $meB64\r\n".getBytes(StandardCharsets.US_ASCII))
+            String xHave = DataUtil.encodeXHave(pieces.getDownloaded(), pieces.nPieces)
+            os.write("X-Have: $xHave\r\n\r\n".getBytes(StandardCharsets.US_ASCII)) 
             os.flush()
-            String code = readTillRN(is)
-            if (code.startsWith("404 ")) {
+            String codeString = readTillRN(is)
+            int space = codeString.indexOf(' ')
+            if (space > 0)
+                codeString = codeString.substring(0, space)
+            
+            int code = Integer.parseInt(codeString.trim())
+            
+            if (code == 404) {
                 log.warning("file not found")
                 endpoint.close()
-                return
+                return false
             }
                 
-            if (code.startsWith("416 ")) {
-                log.warning("range $start-$end cannot be satisfied")
-                return // leave endpoint open
-            }
-            
-            if (!code.startsWith("200 ")) {
+            if (!(code == 200 || code == 416)) {
                 log.warning("unknown code $code")
                 endpoint.close()
-                return
+                return false
             }
 
             // parse all headers
-            Set<String> headers = new HashSet<>()
+            Map<String,String> headers = new HashMap<>()
             String header
-            while((header = readTillRN(is)) != "" && headers.size() < Constants.MAX_HEADERS) 
-                headers.add(header)
-
-            long receivedStart = -1
-            long receivedEnd = -1
-            for (String receivedHeader : headers) {
-                def group = (receivedHeader =~ /^Content-Range: (\d+)-(\d+)$/)
-                if (group.size() != 1) {
-                    log.info("ignoring header $receivedHeader")
-                    continue
-                } 
-
-                receivedStart = Long.parseLong(group[0][1])
-                receivedEnd = Long.parseLong(group[0][2])
+            while((header = readTillRN(is)) != "" && headers.size() < Constants.MAX_HEADERS) {
+                int colon = header.indexOf(':')
+                if (colon == -1 || colon == header.length() - 1)
+                    throw new IOException("invalid header $header")
+                String key = header.substring(0, colon)
+                String value = header.substring(colon + 1) 
+                headers[key] = value.trim()
             }
             
+            // prase X-Alt if present
+            if (headers.containsKey("X-Alt")) {
+                headers["X-Alt"].split(",").each {
+                    if (it.length() > 0) {
+                        byte [] raw = Base64.decode(it)
+                        Persona source = new Persona(new ByteArrayInputStream(raw))
+                        eventBus.publish(new SourceDiscoveredEvent(infoHash : infoHash, source : source))
+                    }
+                }
+            }
+
+            // parse X-Have if present
+            if (headers.containsKey("X-Have")) { 
+                DataUtil.decodeXHave(headers["X-Have"]).each {
+                    available.add(it)
+                }
+                if (!available.contains(piece))
+                    return true // try again next time
+            } else {
+                if (code != 200)
+                    throw new IOException("Code $code but no X-Have")
+                available.clear()
+            }
+            
+            if (code != 200)
+                return true
+            
+            String range = headers["Content-Range"]
+            if (range == null) 
+                throw new IOException("Code 200 but no Content-Range")
+            
+            def group = (range =~ /^(\d+)-(\d+)$/)
+            if (group.size() != 1) 
+                throw new IOException("invalid Content-Range header $range")
+
+            long receivedStart = Long.parseLong(group[0][1])
+            long receivedEnd = Long.parseLong(group[0][2])
+
             if (receivedStart != start || receivedEnd != end) {
                 log.warning("We don't support mismatching ranges yet")
                 endpoint.close()
-                return
+                return false
             }
             
             // start the download
-            channel = Files.newByteChannel(file.toPath(), EnumSet.of(StandardOpenOption.READ, StandardOpenOption.WRITE, 
-                StandardOpenOption.SPARSE, StandardOpenOption.CREATE)) // TODO: double-check, maybe CREATE_NEW
-            mapped = channel.map(FileChannel.MapMode.READ_WRITE, start, end - start + 1)
-            
-            byte[] tmp = new byte[0x1 << 13]
-            while(mapped.hasRemaining()) {
-                if (mapped.remaining() < tmp.length)
-                    tmp = new byte[mapped.remaining()]
-                int read = is.read(tmp)
-                if (read == -1)
-                    throw new IOException()
-                synchronized(this) {
-                    mapped.put(tmp, 0, read)
-                    
-                    if (timestamps.size() == SAMPLES) {
-                        timestamps.removeFirst()
-                        reads.removeFirst()
+            FileChannel channel
+            try {
+                channel = Files.newByteChannel(file.toPath(), EnumSet.of(StandardOpenOption.READ, StandardOpenOption.WRITE,
+                        StandardOpenOption.SPARSE, StandardOpenOption.CREATE)) // TODO: double-check, maybe CREATE_NEW
+                mapped = channel.map(FileChannel.MapMode.READ_WRITE, start, end - start + 1)
+
+                byte[] tmp = new byte[0x1 << 13]
+                while(mapped.hasRemaining()) {
+                    if (mapped.remaining() < tmp.length)
+                        tmp = new byte[mapped.remaining()]
+                    int read = is.read(tmp)
+                    if (read == -1)
+                        throw new IOException()
+                    synchronized(this) {
+                        mapped.put(tmp, 0, read)
+
+                        if (timestamps.size() == SAMPLES) {
+                            timestamps.removeFirst()
+                            reads.removeFirst()
+                        }
+                        timestamps.addLast(System.currentTimeMillis())
+                        reads.addLast(read)
                     }
-                    timestamps.addLast(System.currentTimeMillis())
-                    reads.addLast(read)
                 }
+
+                mapped.clear()
+                digest.update(mapped)
+                byte [] hash = digest.digest()
+                byte [] expected = new byte[32]
+                System.arraycopy(infoHash.getHashList(), piece * 32, expected, 0, 32)
+                if (hash != expected)
+                    throw new BadHashException()
+            } finally {
+                try { channel?.close() } catch (IOException ignore) {}
             }
-            
-            mapped.clear()
-            digest.update(mapped)
-            byte [] hash = digest.digest()
-            byte [] expected = new byte[32]
-            System.arraycopy(infoHash.getHashList(), piece * 32, expected, 0, 32)    
-            if (hash != expected) 
-                throw new BadHashException()
-            
-            downloaded.markDownloaded(piece)        
+            pieces.markDownloaded(piece)
+            unclaim = false
         } finally {
-            claimed.clear(piece)
-            try { channel?.close() } catch (IOException ignore) {}
+            if (unclaim)
+                pieces.unclaim(piece)
         }
         return true
     }
@@ -183,9 +224,22 @@ class DownloadSession {
     synchronized int speed() {
         if (timestamps.size() < SAMPLES)
             return 0
-        long interval = timestamps.last - timestamps.first
         int totalRead = 0
-        reads.each { totalRead += it }
+        int idx = 0
+        final long now = System.currentTimeMillis()
+        
+        while(idx < SAMPLES && timestamps.get(idx) < now - 1000)
+            idx++
+        if (idx == SAMPLES)
+            return 0
+        if (idx == SAMPLES - 1)
+            return reads[idx]
+            
+        long interval = timestamps.last - timestamps[idx]
+        if (interval == 0) 
+            interval = 1
+        for (int i = idx; i < SAMPLES; i++)
+            totalRead += reads[idx]
         (int)(totalRead * 1000.0 / interval)
     }
 }

core/src/main/groovy/com/muwire/core/download/Downloader.groovy

@@ -4,21 +4,30 @@ import com.muwire.core.InfoHash
 import com.muwire.core.Persona
 import com.muwire.core.connection.Endpoint
 
+import java.nio.file.AtomicMoveNotSupportedException
+import java.nio.file.Files
+import java.nio.file.StandardCopyOption
 import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.ExecutorService
 import java.util.concurrent.Executors
+import java.util.concurrent.atomic.AtomicBoolean
 import java.util.logging.Level
 
 import com.muwire.core.Constants
+import com.muwire.core.DownloadedFile
+import com.muwire.core.EventBus
 import com.muwire.core.connection.I2PConnector
+import com.muwire.core.files.FileDownloadedEvent
+import com.muwire.core.util.DataUtil
 
 import groovy.util.logging.Log
 import net.i2p.data.Destination
+import net.i2p.util.ConcurrentHashSet
 
 @Log
 public class Downloader {
-    public enum DownloadState { CONNECTING, DOWNLOADING, FAILED, CANCELLED, FINISHED }
-    private enum WorkerState { CONNECTING, DOWNLOADING, FINISHED}
+    public enum DownloadState { CONNECTING, HASHLIST, DOWNLOADING, FAILED, CANCELLED, PAUSED, FINISHED }
+    private enum WorkerState { CONNECTING, HASHLIST, DOWNLOADING, FINISHED}
     
     private static final ExecutorService executorService = Executors.newCachedThreadPool({r ->
         Thread rv = new Thread(r)
@@ -27,25 +36,33 @@ public class Downloader {
         rv
     })
 
+    private final EventBus eventBus
     private final DownloadManager downloadManager 
     private final Persona me   
     private final File file
-    private final Pieces downloaded, claimed
+    private final Pieces pieces
     private final long length
-    private final InfoHash infoHash
+    private InfoHash infoHash
     private final int pieceSize
     private final I2PConnector connector
     private final Set<Destination> destinations
     private final int nPieces
     private final File piecesFile
+    private final File incompleteFile
+    final int pieceSizePow2
     private final Map<Destination, DownloadWorker> activeWorkers = new ConcurrentHashMap<>()
+    private final Set<Destination> successfulDestinations = new ConcurrentHashSet<>()
     
     
-    private volatile boolean cancelled
+    private volatile boolean cancelled, paused
+    private final AtomicBoolean eventFired = new AtomicBoolean()
+    private boolean piecesFileClosed
 
-    public Downloader(DownloadManager downloadManager, Persona me, File file, long length, InfoHash infoHash, 
+    public Downloader(EventBus eventBus, DownloadManager downloadManager, 
+        Persona me, File file, long length, InfoHash infoHash, 
         int pieceSizePow2, I2PConnector connector, Set<Destination> destinations,
-        File incompletes) {
+        File incompletes, Pieces pieces) {
+        this.eventBus = eventBus
         this.me = me
         this.downloadManager = downloadManager
         this.file = file
@@ -54,17 +71,19 @@ public class Downloader {
         this.connector = connector
         this.destinations = destinations
         this.piecesFile = new File(incompletes, file.getName()+".pieces")
+        this.incompleteFile = new File(incompletes, file.getName()+".part")
+        this.pieceSizePow2 = pieceSizePow2
         this.pieceSize = 1 << pieceSizePow2
-        
-        int nPieces
-        if (length % pieceSize == 0)
-            nPieces = length / pieceSize
-        else
-            nPieces = length / pieceSize + 1
-        this.nPieces = nPieces
-        
-        downloaded = new Pieces(nPieces, Constants.DOWNLOAD_SEQUENTIAL_RATIO)
-        claimed = new Pieces(nPieces)
+        this.pieces = pieces
+        this.nPieces = pieces.nPieces
+    }
+    
+    public synchronized InfoHash getInfoHash() {
+        infoHash
+    }
+    
+    private synchronized void setInfoHash(InfoHash infoHash) {
+        this.infoHash = infoHash
     }
     
     void download() {
@@ -81,29 +100,36 @@ public class Downloader {
     void readPieces() {
         if (!piecesFile.exists())
             return
-        piecesFile.withReader { 
-            int piece = Integer.parseInt(it.readLine())
-            downloaded.markDownloaded(piece)
+        piecesFile.eachLine { 
+            int piece = Integer.parseInt(it)
+            pieces.markDownloaded(piece)
         }
     }
     
     void writePieces() {
-        piecesFile.withPrintWriter { writer ->
-            downloaded.getDownloaded().each { piece -> 
-                writer.println(piece)
+        synchronized(piecesFile) {
+            if (piecesFileClosed)
+                return
+            piecesFile.withPrintWriter { writer ->
+                pieces.getDownloaded().each { piece ->
+                    writer.println(piece)
+                }
             }
         }
     }
     
     public long donePieces() {
-        downloaded.donePieces()
+        pieces.donePieces()
     }
     
     
     public int speed() {
         int total = 0
-        activeWorkers.values().each {
-            total += it.speed()
+        if (getCurrentState() == DownloadState.DOWNLOADING) {
+            activeWorkers.values().each {
+                if (it.currentState == WorkerState.DOWNLOADING)
+                    total += it.speed()
+            }
         }
         total
     }
@@ -111,12 +137,15 @@ public class Downloader {
     public DownloadState getCurrentState() {
         if (cancelled)
             return DownloadState.CANCELLED
+        if (paused)
+            return DownloadState.PAUSED
+            
         boolean allFinished = true
         activeWorkers.values().each { 
             allFinished &= it.currentState == WorkerState.FINISHED
         }
         if (allFinished) {
-            if (downloaded.isComplete())
+            if (pieces.isComplete())
                 return DownloadState.FINISHED
             return DownloadState.FAILED
         }
@@ -133,18 +162,76 @@ public class Downloader {
         if (oneDownloading)
             return DownloadState.DOWNLOADING
         
+        // at least one is requesting hashlist
+        boolean oneHashlist = false
+        activeWorkers.values().each { 
+            if (it.currentState == WorkerState.HASHLIST) {
+                oneHashlist = true
+                return
+            }
+        }
+        if (oneHashlist)
+            return DownloadState.HASHLIST
+            
         return DownloadState.CONNECTING
     }
     
     public void cancel() {
         cancelled = true
+        stop()
+        synchronized(piecesFile) {
+            piecesFileClosed = true
+            piecesFile.delete()
+        }
+        incompleteFile.delete()
+        pieces.clearAll()
+    }
+    
+    public void pause() {
+        paused = true
+        stop()
+    }
+    
+    void stop() {
         activeWorkers.values().each { 
             it.cancel()
         }
     }
     
+    public int activeWorkers() {
+        int active = 0
+        activeWorkers.values().each { 
+            if (it.currentState != WorkerState.FINISHED)
+                active++
+        }
+        active
+    }
+    
     public void resume() {
-        downloadManager.resume(this)
+        paused = false
+        readPieces()
+        destinations.each { destination ->
+            def worker = activeWorkers.get(destination)
+            if (worker != null) {
+                if (worker.currentState == WorkerState.FINISHED) {
+                    def newWorker = new DownloadWorker(destination)
+                    activeWorkers.put(destination, newWorker)
+                    executorService.submit(newWorker)
+                }
+            } else {
+                worker = new DownloadWorker(destination)
+                activeWorkers.put(destination, worker)
+                executorService.submit(worker)
+            }
+        }
+    }
+    
+    void addSource(Destination d) {
+        if (activeWorkers.containsKey(d))
+            return
+        DownloadWorker newWorker = new DownloadWorker(d)
+        activeWorkers.put(d, newWorker)
+        executorService.submit(newWorker)
     }
     
     class DownloadWorker implements Runnable {
@@ -153,6 +240,7 @@ public class Downloader {
         private volatile Thread downloadThread
         private Endpoint endpoint
         private volatile DownloadSession currentSession
+        private final Set<Integer> available = new HashSet<>()
                 
         DownloadWorker(Destination destination) {
             this.destination = destination
@@ -164,19 +252,44 @@ public class Downloader {
             Endpoint endpoint = null
             try {
                 endpoint = connector.connect(destination)
+                while(getInfoHash().hashList == null) {
+                    currentState = WorkerState.HASHLIST
+                    HashListSession session = new HashListSession(me.toBase64(), infoHash, endpoint)
+                    InfoHash received = session.request()
+                    setInfoHash(received)
+                }
                 currentState = WorkerState.DOWNLOADING
                 boolean requestPerformed
-                while(!downloaded.isComplete()) {
-                    currentSession = new DownloadSession(me.toBase64(), downloaded, claimed, infoHash, endpoint, file, pieceSize, length)
+                while(!pieces.isComplete()) {
+                    currentSession = new DownloadSession(eventBus, me.toBase64(), pieces, getInfoHash(), 
+                        endpoint, incompleteFile, pieceSize, length, available)
                     requestPerformed = currentSession.request()
                     if (!requestPerformed)
                         break
+                    successfulDestinations.add(endpoint.destination)
                     writePieces()
                 }
             } catch (Exception bad) {
-                log.log(Level.WARNING,"Exception while downloading",bad)
+                log.log(Level.WARNING,"Exception while downloading",DataUtil.findRoot(bad))
             } finally {
                 currentState = WorkerState.FINISHED
+                if (pieces.isComplete() && eventFired.compareAndSet(false, true)) {
+                    synchronized(piecesFile) {
+                        piecesFileClosed = true
+                        piecesFile.delete()
+                    }
+                    try {
+                        Files.move(incompleteFile.toPath(), file.toPath(), StandardCopyOption.ATOMIC_MOVE)
+                    } catch (AtomicMoveNotSupportedException e) {
+                        Files.copy(incompleteFile.toPath(), file.toPath(), StandardCopyOption.REPLACE_EXISTING)
+                        incompleteFile.delete()
+                    }
+                    eventBus.publish(
+                        new FileDownloadedEvent(
+                            downloadedFile : new DownloadedFile(file, getInfoHash(), pieceSizePow2, successfulDestinations),
+                        downloader : Downloader.this))
+                            
+                } 
                 endpoint?.close()
             }
         }

core/src/main/groovy/com/muwire/core/download/HashListSession.groovy

@@ -0,0 +1,82 @@
+package com.muwire.core.download
+
+import java.nio.ByteBuffer
+import java.nio.charset.StandardCharsets
+import java.security.MessageDigest
+import java.security.NoSuchAlgorithmException
+
+import com.muwire.core.Constants
+import com.muwire.core.InfoHash
+import com.muwire.core.connection.Endpoint
+
+import groovy.util.logging.Log
+
+import static com.muwire.core.util.DataUtil.readTillRN
+
+import net.i2p.data.Base64
+
+@Log
+class HashListSession {
+    private final String meB64
+    private final InfoHash infoHash
+    private final Endpoint endpoint
+    
+    HashListSession(String meB64, InfoHash infoHash, Endpoint endpoint) {
+        this.meB64 = meB64
+        this.infoHash = infoHash
+        this.endpoint = endpoint
+    }
+    
+    InfoHash request() throws IOException {
+        InputStream is = endpoint.getInputStream()
+        OutputStream os = endpoint.getOutputStream()
+        
+        String root = Base64.encode(infoHash.getRoot())
+        os.write("HASHLIST $root\r\n".getBytes(StandardCharsets.US_ASCII))
+        os.write("X-Persona: $meB64\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+        os.flush()
+        
+        String code = readTillRN(is)
+        if (!code.startsWith("200"))
+            throw new IOException("unknown code $code")
+        
+        // parse all headers
+        Set<String> headers = new HashSet<>()
+        String header
+        while((header = readTillRN(is)) != "" && headers.size() < Constants.MAX_HEADERS)
+            headers.add(header)
+            
+        long receivedStart = -1
+        long receivedEnd = -1
+        for (String receivedHeader : headers) {
+            def group = (receivedHeader =~ /^Content-Range: (\d+)-(\d+)$/)
+            if (group.size() != 1) {
+                log.info("ignoring header $receivedHeader")
+                continue
+            }
+
+            receivedStart = Long.parseLong(group[0][1])
+            receivedEnd = Long.parseLong(group[0][2])
+        }
+        
+        if (receivedStart != 0)
+            throw new IOException("hashlist started at $receivedStart")
+        
+        byte[] hashList = new byte[receivedEnd]
+        ByteBuffer hashListBuf = ByteBuffer.wrap(hashList)
+        byte[] tmp = new byte[0x1 << 13]
+        while(hashListBuf.hasRemaining()) {
+            if (hashListBuf.remaining() > tmp.length)
+                tmp = new byte[hashListBuf.remaining()]
+            int read = is.read(tmp)
+            if (read == -1)
+                throw new IOException()
+            hashListBuf.put(tmp, 0, read)
+        }
+        
+        InfoHash received = InfoHash.fromHashList(hashList)
+        if (received.getRoot() != infoHash.getRoot())
+            throw new IOException("fetched list doesn't match root")
+        received
+    }
+}

core/src/main/groovy/com/muwire/core/download/Pieces.groovy

@@ -1,7 +1,7 @@
 package com.muwire.core.download
 
 class Pieces {
-    private final BitSet bitSet
+    private final BitSet done, claimed
     private final int nPieces
     private final float ratio
     private final Random random = new Random()
@@ -13,52 +13,74 @@ class Pieces {
     Pieces(int nPieces, float ratio) {
         this.nPieces = nPieces
         this.ratio = ratio
-        bitSet = new BitSet(nPieces)
+        done = new BitSet(nPieces)
+        claimed = new BitSet(nPieces)
     }
     
-    synchronized int getRandomPiece() {
-        int cardinality = bitSet.cardinality()
-        if (cardinality == nPieces)
+    synchronized int claim() {
+        int claimedCardinality = claimed.cardinality()
+        if (claimedCardinality == nPieces)
             return -1
         
         // if fuller than ratio just do sequential
-        if ( (1.0f * cardinality) / nPieces > ratio) {
-            return bitSet.nextClearBit(0)
+        if ( (1.0f * claimedCardinality) / nPieces > ratio) {
+            int rv = claimed.nextClearBit(0)
+            claimed.set(rv)
+            return rv
         }
         
         while(true) {
             int start = random.nextInt(nPieces)
-            if (bitSet.get(start))
+            if (claimed.get(start))
                 continue
+            claimed.set(start)
             return start
         }
     }
     
-    def getDownloaded() {
+    synchronized int claim(Set<Integer> available) {
+        for (int i = claimed.nextSetBit(0); i >= 0; i = claimed.nextSetBit(i+1))
+            available.remove(i)
+        if (available.isEmpty())
+            return -1
+        List<Integer> toList = available.toList()
+        Collections.shuffle(toList)
+        int rv = toList[0]
+        claimed.set(rv)
+        rv
+    }
+    
+    synchronized def getDownloaded() {
         def rv = []
-        for (int i = bitSet.nextSetBit(0); i >= 0; i = bitSet.nextSetBit(i+1)) {
+        for (int i = done.nextSetBit(0); i >= 0; i = done.nextSetBit(i+1)) {
             rv << i
         }
         rv
     }
     
     synchronized void markDownloaded(int piece) {
-        bitSet.set(piece)
+        done.set(piece)
+        claimed.set(piece)
     }
     
-    synchronized void clear(int piece) {
-        bitSet.clear(piece)
+    synchronized void unclaim(int piece) {
+        claimed.clear(piece)
     }
     
     synchronized boolean isComplete() {
-        bitSet.cardinality() == nPieces
-    }
-    
-    synchronized boolean isMarked(int piece) {
-        bitSet.get(piece)
+        done.cardinality() == nPieces
     }
     
     synchronized int donePieces() {
-        bitSet.cardinality()
+        done.cardinality()
+    }
+    
+    synchronized boolean isDownloaded(int piece) {
+        done.get(piece)
+    }
+    
+    synchronized void clearAll() {
+        done.clear()
+        claimed.clear()
     }
 }

core/src/main/groovy/com/muwire/core/download/SourceDiscoveredEvent.groovy

@@ -0,0 +1,10 @@
+package com.muwire.core.download
+
+import com.muwire.core.Event
+import com.muwire.core.InfoHash
+import com.muwire.core.Persona
+
+class SourceDiscoveredEvent extends Event {
+    InfoHash infoHash
+    Persona source
+}

core/src/main/groovy/com/muwire/core/download/UIDownloadCancelledEvent.groovy

@@ -0,0 +1,7 @@
+package com.muwire.core.download
+
+import com.muwire.core.Event
+
+class UIDownloadCancelledEvent extends Event {
+    Downloader downloader
+}

core/src/main/groovy/com/muwire/core/download/UIDownloadEvent.groovy

@@ -3,8 +3,11 @@ package com.muwire.core.download
 import com.muwire.core.Event
 import com.muwire.core.search.UIResultEvent
 
+import net.i2p.data.Destination
+
 class UIDownloadEvent extends Event {
     
     UIResultEvent[] result
+    Set<Destination> sources
     File target
 }

core/src/main/groovy/com/muwire/core/download/UIDownloadPausedEvent.groovy

@@ -0,0 +1,6 @@
+package com.muwire.core.download
+
+import com.muwire.core.Event
+
+class UIDownloadPausedEvent extends Event {
+}

core/src/main/groovy/com/muwire/core/download/UIDownloadResumedEvent.groovy

@@ -0,0 +1,6 @@
+package com.muwire.core.download
+
+import com.muwire.core.Event
+
+class UIDownloadResumedEvent extends Event {
+}

core/src/main/groovy/com/muwire/core/files/AllFilesLoadedEvent.groovy

@@ -0,0 +1,6 @@
+package com.muwire.core.files
+
+import com.muwire.core.Event
+
+class AllFilesLoadedEvent extends Event {
+}

core/src/main/groovy/com/muwire/core/files/DirectoryUnsharedEvent.groovy

@@ -0,0 +1,7 @@
+package com.muwire.core.files
+
+import com.muwire.core.Event
+
+class DirectoryUnsharedEvent extends Event {
+    File directory
+}

core/src/main/groovy/com/muwire/core/files/DirectoryWatcher.groovy

@@ -0,0 +1,148 @@
+package com.muwire.core.files
+
+import java.nio.file.FileSystem
+import java.nio.file.FileSystems
+import java.nio.file.Path
+import java.nio.file.Paths
+import static java.nio.file.StandardWatchEventKinds.*
+
+import java.nio.file.ClosedWatchServiceException
+import java.nio.file.WatchEvent
+import java.nio.file.WatchKey
+import java.nio.file.WatchService
+import java.util.concurrent.ConcurrentHashMap
+
+import com.muwire.core.EventBus
+import com.muwire.core.SharedFile
+
+import groovy.util.logging.Log
+import net.i2p.util.SystemVersion
+
+@Log
+class DirectoryWatcher {
+    
+    private static final long WAIT_TIME = 1000
+    
+    private static final WatchEvent.Kind[] kinds
+    static {
+        if (SystemVersion.isMac())
+            kinds = [ENTRY_MODIFY, ENTRY_DELETE]
+        else
+            kinds = [ENTRY_CREATE, ENTRY_MODIFY, ENTRY_DELETE]
+    }
+    
+    private final EventBus eventBus
+    private final FileManager fileManager
+    private final Thread watcherThread, publisherThread
+    private final Map<File, Long> waitingFiles = new ConcurrentHashMap<>()
+    private final Map<File, WatchKey> watchedDirectories = new ConcurrentHashMap<>()
+    private WatchService watchService
+    private volatile boolean shutdown
+    
+    DirectoryWatcher(EventBus eventBus, FileManager fileManager) {
+        this.eventBus = eventBus
+        this.fileManager = fileManager
+        this.watcherThread = new Thread({watch() } as Runnable, "directory-watcher")
+        watcherThread.setDaemon(true)
+        this.publisherThread = new Thread({publish()} as Runnable, "watched-files-publisher")
+        publisherThread.setDaemon(true)
+    }
+    
+    void onAllFilesLoadedEvent(AllFilesLoadedEvent e) {
+        watchService = FileSystems.getDefault().newWatchService()
+        watcherThread.start()
+        publisherThread.start()
+    }
+    
+    void stop() {
+        shutdown = true
+        watcherThread?.interrupt()
+        publisherThread?.interrupt()
+        watchService?.close()
+    }
+    
+    void onFileSharedEvent(FileSharedEvent e) {
+        if (!e.file.isDirectory())
+            return
+        Path path = e.file.getCanonicalFile().toPath()
+        WatchKey wk = path.register(watchService, kinds)
+        watchedDirectories.put(e.file, wk)
+        
+    }
+    
+    void onDirectoryUnsharedEvent(DirectoryUnsharedEvent e) {
+        WatchKey wk = watchedDirectories.remove(e.directory)
+        wk?.cancel()
+    }
+
+    private void watch() {
+        try {
+            while(!shutdown) {
+                WatchKey key = watchService.take()
+                key.pollEvents().each {
+                    switch(it.kind()) {
+                        case ENTRY_CREATE: processCreated(key.watchable(), it.context()); break
+                        case ENTRY_MODIFY: processModified(key.watchable(), it.context()); break
+                        case ENTRY_DELETE: processDeleted(key.watchable(), it.context()); break
+                    }
+                }
+                key.reset()
+            }
+        } catch (InterruptedException|ClosedWatchServiceException e) {
+            if (!shutdown)
+                throw e
+        }
+    }
+    
+
+    private void processCreated(Path parent, Path path) {
+        File f= join(parent, path)
+        log.fine("created entry $f")
+        if (f.isDirectory())
+            f.toPath().register(watchService, kinds)
+        else
+            waitingFiles.put(f, System.currentTimeMillis())
+    }
+        
+    private void processModified(Path parent, Path path) {
+        File f = join(parent, path)
+        log.fine("modified entry $f")
+        waitingFiles.put(f, System.currentTimeMillis())
+    }
+    
+    private void processDeleted(Path parent, Path path) {
+        File f = join(parent, path)
+        log.fine("deleted entry $f")
+        SharedFile sf = fileManager.fileToSharedFile.get(f)
+        if (sf != null)
+            eventBus.publish(new FileUnsharedEvent(unsharedFile : sf))
+    }
+    
+    private static File join(Path parent, Path path) {
+        File parentFile = parent.toFile().getCanonicalFile()
+        new File(parentFile, path.toFile().getName())
+    }
+    
+    private void publish() {
+        try {
+            while(!shutdown) {
+                Thread.sleep(WAIT_TIME)
+                long now = System.currentTimeMillis()
+                def published = []
+                waitingFiles.each { file, timestamp ->
+                    if (now - timestamp > WAIT_TIME) {
+                        log.fine("publishing file $file")
+                        eventBus.publish new FileSharedEvent(file : file)
+                        published << file
+                    }
+                }
+                published.each {
+                    waitingFiles.remove(it)
+                }
+            }
+        } catch (InterruptedException e) {
+            if (!shutdown)
+                throw e
+        }
+    }
+}

core/src/main/groovy/com/muwire/core/files/FileDownloadedEvent.groovy

@@ -2,10 +2,11 @@ package com.muwire.core.files
 
 import com.muwire.core.DownloadedFile
 import com.muwire.core.Event
+import com.muwire.core.download.Downloader
 
 import net.i2p.data.Destination
 
 class FileDownloadedEvent extends Event {
-
+    Downloader downloader
 	DownloadedFile downloadedFile
 }

core/src/main/groovy/com/muwire/core/files/FileHashedEvent.groovy

@@ -7,4 +7,10 @@ class FileHashedEvent extends Event {
 
 	SharedFile sharedFile
 	String error
+    
+    @Override
+    public String toString() {
+        super.toString() + " sharedFile " + sharedFile?.file.getAbsolutePath() + " error: $error"
+    }
+    
 }

core/src/main/groovy/com/muwire/core/files/FileHasher.groovy

@@ -1,6 +1,9 @@
 package com.muwire.core.files
 
 import com.muwire.core.InfoHash
+
+import net.i2p.data.Base64
+
 import java.nio.MappedByteBuffer
 import java.nio.channels.FileChannel
 import java.nio.channels.FileChannel.MapMode
@@ -17,12 +20,12 @@ class FileHasher {
 	 * @return the size of each piece in power of 2
 	 */
 	static int getPieceSize(long size) {
-		if (size <= 0x1 << 25)
-			return 18
+		if (size <= 0x1 << 30)
+			return 17
 		
-		for (int i = 26; i <= 37; i++) {
+		for (int i = 31; i <= 37; i++) {
 			if (size <= 0x1L << i) {
-				return i-7
+				return i-13
 			}
 		}
 		
@@ -52,11 +55,11 @@ class FileHasher {
 		try {
 			MappedByteBuffer buf
 			for (int i = 0; i < numPieces - 1; i++) {
-				buf = raf.getChannel().map(MapMode.READ_ONLY, size * i, size)
+				buf = raf.getChannel().map(MapMode.READ_ONLY, ((long)size) * i, size)
 				digest.update buf
 				output.write(digest.digest(), 0, 32)
 			}
-			def lastPieceLength = length - (numPieces - 1) * size
+			def lastPieceLength = length - (numPieces - 1) * ((long)size)
 			buf = raf.getChannel().map(MapMode.READ_ONLY, length - lastPieceLength, lastPieceLength)
 			digest.update buf
 			output.write(digest.digest(), 0, 32)
@@ -67,4 +70,18 @@ class FileHasher {
 		byte [] hashList = output.toByteArray()
 		InfoHash.fromHashList(hashList)
 	}
+    
+    public static void main(String[] args) {
+        if (args.length != 1) {
+            println "This utility computes an infohash of a file"
+            println "Pass absolute path to a file as an argument"
+            System.exit(1)
+        }
+        
+        def file = new File(args[0])
+        file = file.getAbsoluteFile()
+        def hasher = new FileHasher()
+        def infohash = hasher.hashFile(file)
+        println Base64.encode(infohash.getRoot())
+    }
 }

core/src/main/groovy/com/muwire/core/files/FileManager.groovy

@@ -2,7 +2,9 @@ package com.muwire.core.files
 
 import com.muwire.core.EventBus
 import com.muwire.core.InfoHash
+import com.muwire.core.MuWireSettings
 import com.muwire.core.SharedFile
+import com.muwire.core.UILoadedEvent
 import com.muwire.core.search.ResultsEvent
 import com.muwire.core.search.SearchEvent
 import com.muwire.core.search.SearchIndex
@@ -14,27 +16,31 @@ class FileManager {
 
 
 	final EventBus eventBus
+    final MuWireSettings settings
 	final Map<InfoHash, Set<SharedFile>> rootToFiles = Collections.synchronizedMap(new HashMap<>())
 	final Map<File, SharedFile> fileToSharedFile = Collections.synchronizedMap(new HashMap<>())
 	final Map<String, Set<File>> nameToFiles = new HashMap<>()
 	final SearchIndex index = new SearchIndex()
 	
-	FileManager(EventBus eventBus) {
+	FileManager(EventBus eventBus, MuWireSettings settings) {
+        this.settings = settings
 		this.eventBus = eventBus
 	}
 	
-	void onFileHashedEvent(FileHashedEvent e) {
-		if (e.sharedFile != null)
-			addToIndex(e.sharedFile)
-	}
+    void onFileHashedEvent(FileHashedEvent e) {
+        if (e.sharedFile != null)
+            addToIndex(e.sharedFile)
+    }
 	
 	void onFileLoadedEvent(FileLoadedEvent e) {
 		addToIndex(e.loadedFile)
 	}
 	
-	void onFileDownloadedEvent(FileDownloadedEvent e) {
-		addToIndex(e.downloadedFile)
-	}
+    void onFileDownloadedEvent(FileDownloadedEvent e) {
+        if (settings.shareDownloadedFiles) {
+            addToIndex(e.downloadedFile)
+        }
+    }
 	
 	private void addToIndex(SharedFile sf) {
         log.info("Adding shared file " + sf.getFile())
@@ -100,20 +106,45 @@ class FileManager {
 		if (e.searchHash != null) {
             Set<SharedFile> found
             found = rootToFiles.get new InfoHash(e.searchHash)
+            found = filter(found, e.oobInfohash)
 			if (found != null && !found.isEmpty())
-				re = new ResultsEvent(results: found.asList(), uuid: e.uuid)
+				re = new ResultsEvent(results: found.asList(), uuid: e.uuid, searchEvent: e)
 		} else {
 			def names = index.search e.searchTerms
 			Set<File> files = new HashSet<>()
 			names.each { files.addAll nameToFiles.getOrDefault(it, []) }
 			Set<SharedFile> sharedFiles = new HashSet<>()
 			files.each { sharedFiles.add fileToSharedFile[it] }
+            files = filter(sharedFiles, e.oobInfohash)
 			if (!sharedFiles.isEmpty())
-				re = new ResultsEvent(results: sharedFiles.asList(), uuid: e.uuid)
+				re = new ResultsEvent(results: sharedFiles.asList(), uuid: e.uuid, searchEvent: e)
 			
 		}
 		
 		if (re != null)
 			eventBus.publish(re)
 	}
+    
+    private static Set<SharedFile> filter(Set<SharedFile> files, boolean oob) {
+        if (!oob)
+            return files
+        Set<SharedFile> rv = new HashSet<>()
+        files.each { 
+            if (it.getPieceSize() != 0)
+                rv.add(it)
+        }
+        rv
+    }
+    
+    void onDirectoryUnsharedEvent(DirectoryUnsharedEvent e) {
+        e.directory.listFiles().each { 
+            if (it.isDirectory())
+                eventBus.publish(new DirectoryUnsharedEvent(directory : it))
+            else {
+                SharedFile sf = fileToSharedFile.get(it)
+                if (sf != null)
+                    eventBus.publish(new FileUnsharedEvent(unsharedFile : sf))
+            }
+        }
+    }
 }

core/src/main/groovy/com/muwire/core/files/FileSharedEvent.groovy

@@ -5,4 +5,9 @@ import com.muwire.core.Event
 class FileSharedEvent extends Event {
 
 	File file
+    
+    @Override
+    public String toString() {
+        return super.toString() + " file: "+file.getAbsolutePath()
+    }
 }

core/src/main/groovy/com/muwire/core/files/HasherService.groovy

@@ -10,11 +10,13 @@ class HasherService {
 
 	final FileHasher hasher
 	final EventBus eventBus
+    final FileManager fileManager
 	Executor executor
 	
-	HasherService(FileHasher hasher, EventBus eventBus) {
+	HasherService(FileHasher hasher, EventBus eventBus, FileManager fileManager) {
 		this.hasher = hasher
 		this.eventBus = eventBus
+        this.fileManager = fileManager
 	}
 	
 	void start() {
@@ -22,13 +24,15 @@ class HasherService {
 	}
 	
 	void onFileSharedEvent(FileSharedEvent evt) {
+        if (fileManager.fileToSharedFile.containsKey(evt.file))
+            return
 		executor.execute( { -> process(evt.file) } as Runnable)
 	}
 	
 	private void process(File f) {
 		f = f.getCanonicalFile()
 		if (f.isDirectory()) {
-			f.listFiles().each {onFileSharedEvent new FileSharedEvent(file: it) }
+			f.listFiles().each {eventBus.publish new FileSharedEvent(file: it) }
 		} else {
 			if (f.length() == 0) {
 				eventBus.publish new FileHashedEvent(error: "Not sharing empty file $f")
@@ -36,7 +40,7 @@ class HasherService {
 				eventBus.publish new FileHashedEvent(error: "$f is too large to be shared ${f.length()}")
 			} else {
 				def hash = hasher.hashFile f
-				eventBus.publish new FileHashedEvent(sharedFile: new SharedFile(f, hash))
+				eventBus.publish new FileHashedEvent(sharedFile: new SharedFile(f, hash, FileHasher.getPieceSize(f.length())))
 			}
 		}
 	}

core/src/main/groovy/com/muwire/core/files/PersisterService.groovy

@@ -1,5 +1,8 @@
 package com.muwire.core.files
 
+import java.nio.file.CopyOption
+import java.nio.file.Files
+import java.nio.file.StandardCopyOption
 import java.util.logging.Level
 import java.util.stream.Collectors
 
@@ -8,6 +11,7 @@ import com.muwire.core.EventBus
 import com.muwire.core.InfoHash
 import com.muwire.core.Service
 import com.muwire.core.SharedFile
+import com.muwire.core.UILoadedEvent
 import com.muwire.core.util.DataUtil
 
 import groovy.json.JsonOutput
@@ -33,14 +37,14 @@ class PersisterService extends Service {
 		timer = new Timer("file persister", true)
 	}
 	
-	void start() {
-		timer.schedule({load()} as TimerTask, 1000)
-	}
-	
 	void stop() {
 		timer.cancel()
 	}
-	
+
+    void onUILoadedEvent(UILoadedEvent e) {
+        timer.schedule({load()} as TimerTask, 1)
+    }
+    	
 	void load() {
 		if (location.exists() && location.isFile()) {
 			def slurper = new JsonSlurper()
@@ -55,10 +59,13 @@ class PersisterService extends Service {
 						}
 					}
 				}
+                listener.publish(new AllFilesLoadedEvent())
 			} catch (IllegalArgumentException|NumberFormatException e) {
                 log.log(Level.WARNING, "couldn't load files",e)
 			}
-		}
+		} else {
+            listener.publish(new AllFilesLoadedEvent())
+        }
 		timer.schedule({persistFiles()} as TimerTask, 0, interval)
 		loaded = true
 	}
@@ -94,28 +101,37 @@ class PersisterService extends Service {
 		if (!Arrays.equals(root, ih.getRoot()))
 			return null
 			
-		if (json.sources != null) {
+        int pieceSize = 0
+        if (json.pieceSize != null)
+            pieceSize = json.pieceSize
+            
+        if (json.sources != null) {
 			List sources = (List)json.sources
 			Set<Destination> sourceSet = sources.stream().map({d -> new Destination(d.toString())}).collect Collectors.toSet()
-			DownloadedFile df = new DownloadedFile(file, ih, sourceSet)
+			DownloadedFile df = new DownloadedFile(file, ih, pieceSize, sourceSet)
 			return new FileLoadedEvent(loadedFile : df)
 		}
+        
 		 
-		SharedFile sf = new SharedFile(file, ih)
+		SharedFile sf = new SharedFile(file, ih, pieceSize)
 		return new FileLoadedEvent(loadedFile: sf)
 		
 	}
 	
 	private void persistFiles() {
-		location.delete()
 		def sharedFiles = fileManager.getSharedFiles()
-		location.withPrintWriter { writer ->
+        
+        File tmp = File.createTempFile("muwire-files", "tmp")
+        tmp.deleteOnExit()
+		tmp.withPrintWriter { writer ->
 			sharedFiles.each { k, v ->
 				def json = toJson(k,v)
 				json = JsonOutput.toJson(json)
 				writer.println json
 			}
 		}
+        Files.copy(tmp.toPath(), location.toPath(), StandardCopyOption.REPLACE_EXISTING)
+        tmp.delete()
 	}
 	
 	private def toJson(File f, SharedFile sf) {
@@ -124,6 +140,7 @@ class PersisterService extends Service {
 		json.length = f.length()
 		InfoHash ih = sf.getInfoHash()
 		json.infoHash = Base64.encode ih.getRoot()
+        json.pieceSize = sf.getPieceSize()
 		byte [] tmp = new byte [32]
 		json.hashList = []
 		for (int i = 0;i < ih.getHashList().length / 32; i++) {

core/src/main/groovy/com/muwire/core/hostcache/CacheClient.groovy

@@ -140,7 +140,7 @@ class CacheClient {
 		pong.pongs.asList().each { 
 			Destination dest = new Destination(it)
 			if (!session.getMyDestination().equals(dest))
-				eventBus.publish(new HostDiscoveredEvent(destination: dest)) 
+				eventBus.publish(new HostDiscoveredEvent(destination: dest, fromHostcache : true)) 
 		}
 		
 	}

core/src/main/groovy/com/muwire/core/hostcache/Host.groovy

@@ -7,20 +7,25 @@ class Host {
 	private static final int MAX_FAILURES = 3
 	
 	final Destination destination
+    private final int clearInterval
 	int failures,successes
+    long lastAttempt
 	
-	public Host(Destination destination) {
+	public Host(Destination destination, int clearInterval) {
 		this.destination = destination
+        this.clearInterval = clearInterval
 	}
 
 	synchronized void onConnect() {
 		failures = 0
 		successes++
+        lastAttempt = System.currentTimeMillis()
 	}
 	
 	synchronized void onFailure() {
 		failures++
 		successes = 0
+        lastAttempt = System.currentTimeMillis()
 	}
 	
 	synchronized boolean isFailed() {
@@ -30,4 +35,12 @@ class Host {
 	synchronized boolean hasSucceeded() {
 		successes > 0
 	}
+    
+    synchronized void clearFailures() {
+        failures = 0
+    }
+    
+    synchronized void canTryAgain() {
+        System.currentTimeMillis() - lastAttempt > (clearInterval * 60 * 1000)
+    }
 }

core/src/main/groovy/com/muwire/core/hostcache/HostCache.groovy

@@ -46,9 +46,13 @@ class HostCache extends Service {
 	void onHostDiscoveredEvent(HostDiscoveredEvent e) {
 		if (myself == e.destination)
 			return
-		if (hosts.containsKey(e.destination))
-			return
-		Host host = new Host(e.destination)
+		if (hosts.containsKey(e.destination)) {
+            if (!e.fromHostcache)
+                return
+            hosts.get(e.destination).clearFailures()
+            return
+		}
+		Host host = new Host(e.destination, settings.hostClearInterval)
 		if (allowHost(host)) {
 			hosts.put(e.destination, host)
 		}
@@ -60,7 +64,7 @@ class HostCache extends Service {
 		Destination dest = e.endpoint.destination
 		Host host = hosts.get(dest)
 		if (host == null) {
-			host = new Host(dest)
+			host = new Host(dest, settings.hostClearInterval)
 			hosts.put(dest, host)
 		}
 
@@ -102,9 +106,11 @@ class HostCache extends Service {
 			storage.eachLine {
 				def entry = slurper.parseText(it)
 				Destination dest = new Destination(entry.destination)
-				Host host = new Host(dest)
+				Host host = new Host(dest, settings.hostClearInterval)
 				host.failures = Integer.valueOf(String.valueOf(entry.failures))
 				host.successes = Integer.valueOf(String.valueOf(entry.successes))
+                if (entry.lastAttempt != null)
+                    host.lastAttempt = entry.lastAttempt
 				if (allowHost(host))
 					hosts.put(dest, host)
 			}
@@ -114,7 +120,7 @@ class HostCache extends Service {
 	}
 	
 	private boolean allowHost(Host host) {
-		if (host.isFailed())
+		if (host.isFailed() && !host.canTryAgain())
 			return false
 		if (host.destination == myself)
 			return false
@@ -139,6 +145,7 @@ class HostCache extends Service {
 					map.destination = dest.toBase64()
 					map.failures = host.failures
 					map.successes = host.successes
+                    map.lastAttempt = host.lastAttempt
 					def json = JsonOutput.toJson(map)
 					writer.println json
 				}

core/src/main/groovy/com/muwire/core/hostcache/HostDiscoveredEvent.groovy

@@ -7,9 +7,10 @@ import net.i2p.data.Destination
 class HostDiscoveredEvent extends Event {
 
 	Destination destination
-	
+    boolean fromHostcache
+    
 	@Override
 	public String toString() {
-		"HostDiscoveredEvent ${super.toString()} destination:${destination.toBase32()}"
+		"HostDiscoveredEvent ${super.toString()} destination:${destination.toBase32()} from hostcache $fromHostcache"
 	}
 }

core/src/main/groovy/com/muwire/core/mesh/Mesh.groovy

@@ -0,0 +1,28 @@
+package com.muwire.core.mesh
+
+import com.muwire.core.InfoHash
+import com.muwire.core.Persona
+import com.muwire.core.download.Pieces
+
+import net.i2p.data.Destination
+import net.i2p.util.ConcurrentHashSet
+
+class Mesh {
+    private final InfoHash infoHash
+    private final Set<Persona> sources = new ConcurrentHashSet<>()
+    private final Pieces pieces
+    
+    Mesh(InfoHash infoHash, Pieces pieces) {
+        this.infoHash = infoHash
+        this.pieces = pieces
+    }
+    
+    Set<Persona> getRandom(int n, Persona exclude) {
+        List<Persona> tmp = new ArrayList<>(sources)
+        tmp.remove(exclude)
+        Collections.shuffle(tmp)
+        if (tmp.size() < n)
+            return tmp
+        tmp[0..n-1]
+    }
+}

core/src/main/groovy/com/muwire/core/mesh/MeshManager.groovy

@@ -0,0 +1,102 @@
+package com.muwire.core.mesh
+
+import java.util.stream.Collectors
+
+import com.muwire.core.Constants
+import com.muwire.core.InfoHash
+import com.muwire.core.MuWireSettings
+import com.muwire.core.Persona
+import com.muwire.core.download.Pieces
+import com.muwire.core.download.SourceDiscoveredEvent
+import com.muwire.core.files.FileManager
+import com.muwire.core.util.DataUtil
+
+import groovy.json.JsonOutput
+import groovy.json.JsonSlurper
+import net.i2p.data.Base64
+
+class MeshManager {
+    
+    private final Map<InfoHash, Mesh> meshes = Collections.synchronizedMap(new HashMap<>())
+    private final FileManager fileManager
+    private final File home
+    private final MuWireSettings settings
+    
+    MeshManager(FileManager fileManager, File home, MuWireSettings settings) {
+        this.fileManager = fileManager
+        this.home = home
+        this.settings = settings
+        load()
+    }
+    
+    Mesh get(InfoHash infoHash) {
+        meshes.get(infoHash)
+    }
+    
+    Mesh getOrCreate(InfoHash infoHash, int nPieces) {
+        synchronized(meshes) {
+            if (meshes.containsKey(infoHash))
+                return meshes.get(infoHash)
+            Pieces pieces = new Pieces(nPieces, settings.downloadSequentialRatio)
+            if (fileManager.rootToFiles.containsKey(infoHash)) {
+                for (int i = 0; i < nPieces; i++)
+                    pieces.markDownloaded(i)
+            }
+            Mesh rv = new Mesh(infoHash, pieces)
+            meshes.put(infoHash, rv)
+            return rv
+        }
+    }
+    
+    void onSourceDiscoveredEvent(SourceDiscoveredEvent e) {
+        Mesh mesh = meshes.get(e.infoHash)
+        if (mesh == null)
+            return
+       mesh.sources.add(e.source)
+       save()
+    }
+    
+    private void save() {
+        File meshFile = new File(home, "mesh.json")
+        synchronized(meshes) {
+            meshFile.withPrintWriter { writer ->
+                meshes.values().each { mesh ->
+                    def json = [:]
+                    json.timestamp = System.currentTimeMillis()
+                    json.infoHash = Base64.encode(mesh.infoHash.getRoot())
+                    json.sources = mesh.sources.stream().map({it.toBase64()}).collect(Collectors.toList())
+                    json.nPieces = mesh.pieces.nPieces
+                    json.xHave = DataUtil.encodeXHave(mesh.pieces.downloaded, mesh.pieces.nPieces)
+                    writer.println(JsonOutput.toJson(json))
+                }
+            }
+        }
+    }
+    
+    private void load() {
+        File meshFile = new File(home, "mesh.json")
+        if (!meshFile.exists())
+            return
+        long now = System.currentTimeMillis()
+        JsonSlurper slurper = new JsonSlurper()
+        meshFile.eachLine { 
+            def json = slurper.parseText(it)
+            if (now - json.timestamp > settings.meshExpiration * 60 * 1000)
+                return
+            InfoHash infoHash = new InfoHash(Base64.decode(json.infoHash))
+            Pieces pieces = new Pieces(json.nPieces, settings.downloadSequentialRatio)
+            
+            Mesh mesh = new Mesh(infoHash, pieces)
+            json.sources.each { source -> 
+                Persona persona = new Persona(new ByteArrayInputStream(Base64.decode(source)))
+                mesh.sources.add(persona)
+            }
+            
+            if (json.xHave != null) 
+                DataUtil.decodeXHave(json.xHave).each { pieces.markDownloaded(it) }
+                
+            if (!mesh.sources.isEmpty())
+                meshes.put(infoHash, mesh)
+        }
+    }
+}

core/src/main/groovy/com/muwire/core/search/QueryEvent.groovy

@@ -13,4 +13,8 @@ class QueryEvent extends Event {
     Persona originator
 	Destination receivedOn
 
+    String toString() {
+        "searchEvent: $searchEvent firstHop:$firstHop, replyTo:${replyTo.toBase32()}" +
+        "originator: ${originator.getHumanReadableName()} receivedOn: ${receivedOn.toBase32()}"
+    }
 }

core/src/main/groovy/com/muwire/core/search/ResultsEvent.groovy

@@ -5,6 +5,7 @@ import com.muwire.core.SharedFile
 
 class ResultsEvent extends Event {
 
+    SearchEvent searchEvent
 	SharedFile[] results
 	UUID uuid
 }

core/src/main/groovy/com/muwire/core/search/ResultsParser.groovy

@@ -1,5 +1,7 @@
 package com.muwire.core.search
 
+import java.util.stream.Collectors
+
 import javax.naming.directory.InvalidSearchControlsException
 
 import com.muwire.core.InfoHash
@@ -7,13 +9,25 @@ import com.muwire.core.Persona
 import com.muwire.core.util.DataUtil
 
 import net.i2p.data.Base64
+import net.i2p.data.Destination
 
 class ResultsParser {
     public static UIResultEvent parse(Persona p, UUID uuid, def json) throws InvalidSearchResultException {
         if (json.type != "Result")
             throw new InvalidSearchResultException("not a result json")
-        if (json.version != 1)
-            throw new InvalidSearchResultException("unknown version $json.version")
+        switch(json.version) {
+            case 1:
+                return parseV1(p, uuid, json)
+            case 2:
+                return parseV2(p, uuid, json)
+            default:
+                throw new InvalidSearchResultException("unknown version $json.version")
+
+        }
+
+    }
+    
+    private static parseV1(Persona p, UUID uuid, def json) {
         if (json.name == null)
             throw new InvalidSearchResultException("name missing")
         if (json.size == null)
@@ -47,9 +61,45 @@ class ResultsParser {
                  size : size,
                  infohash : parsedIH,
                  pieceSize : pieceSize,
+                 sources : Collections.emptySet(),
                  uuid : uuid)
         } catch (Exception e) {
             throw new InvalidSearchResultException("parsing search result failed",e)
         }
     }
+    
+    private static UIResultEvent parseV2(Persona p, UUID uuid, def json) {
+        if (json.name == null)
+            throw new InvalidSearchResultException("name missing")
+        if (json.size == null)
+            throw new InvalidSearchResultException("length missing")
+        if (json.infohash == null)
+            throw new InvalidSearchResultException("infohash missing")
+        if (json.pieceSize == null)
+            throw new InvalidSearchResultException("pieceSize missing")
+        if (json.hashList != null)
+            throw new InvalidSearchResultException("V2 result with hashlist")
+        try {
+            String name = DataUtil.readi18nString(Base64.decode(json.name))
+            long size = json.size
+            byte [] infoHash = Base64.decode(json.infohash)
+            if (infoHash.length != InfoHash.SIZE)
+                throw new InvalidSearchResultException("invalid infohash size $infoHash.length")
+            int pieceSize = json.pieceSize
+            
+            Set<Destination> sources = Collections.emptySet()
+            if (json.sources != null) 
+                sources = json.sources.stream().map({new Destination(it)}).collect(Collectors.toSet())
+            
+            return new UIResultEvent( sender : p,
+                name : name,
+                size : size,
+                infohash : new InfoHash(infoHash),
+                pieceSize : pieceSize,
+                sources : sources,
+                uuid: uuid)
+        } catch (Exception e) {
+            throw new InvalidSearchResultException("parsing search result failed",e)
+        }
+    }
 }

core/src/main/groovy/com/muwire/core/search/ResultsSender.groovy

@@ -11,7 +11,10 @@ import java.util.concurrent.Executor
 import java.util.concurrent.Executors
 import java.util.concurrent.ThreadFactory
 import java.util.concurrent.atomic.AtomicInteger
+import java.util.logging.Level
+import java.util.stream.Collectors
 
+import com.muwire.core.DownloadedFile
 import com.muwire.core.EventBus
 import com.muwire.core.InfoHash
 
@@ -46,22 +49,30 @@ class ResultsSender {
         this.me = me
     }
     
-    void sendResults(UUID uuid, SharedFile[] results, Destination target) {
-        log.info("Sending $results.length results for uuid $uuid to ${target.toBase32()}")
+    void sendResults(UUID uuid, SharedFile[] results, Destination target, boolean oobInfohash) {
+        log.info("Sending $results.length results for uuid $uuid to ${target.toBase32()} oobInfohash : $oobInfohash")
         if (target.equals(me.destination)) {
             results.each { 
                 long length = it.getFile().length()
+                int pieceSize = it.getPieceSize()
+                if (pieceSize == 0)
+                    pieceSize = FileHasher.getPieceSize(length)
+                Set<Destination> suggested = Collections.emptySet()
+                if (it instanceof DownloadedFile) 
+                    suggested = it.sources
                 def uiResultEvent = new UIResultEvent( sender : me,
                     name : it.getFile().getName(),
                     size : length,
                     infohash : it.getInfoHash(),
-                    pieceSize : FileHasher.getPieceSize(length),
-                    uuid : uuid
+                    pieceSize : pieceSize,
+                    uuid : uuid,
+                    sources : suggested
                     )
                     eventBus.publish(uiResultEvent)
             }
         } else {
-            executor.execute(new ResultSendJob(uuid : uuid, results : results, target: target))
+            executor.execute(new ResultSendJob(uuid : uuid, results : results, 
+                target: target, oobInfohash : oobInfohash))
         }
     }
     
@@ -69,48 +80,58 @@ class ResultsSender {
         UUID uuid
         SharedFile [] results
         Destination target
+        boolean oobInfohash
         
         @Override
         public void run() {
-            byte [] tmp = new byte[InfoHash.SIZE]
-            JsonOutput jsonOutput = new JsonOutput()
-            Endpoint endpoint = null;
             try {
-                endpoint = connector.connect(target)
-                DataOutputStream os = new DataOutputStream(endpoint.getOutputStream())
-                os.write("POST $uuid\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
-                me.write(os)
-                os.writeShort((short)results.length)
-                results.each {
-                    byte [] name = it.getFile().getName().getBytes(StandardCharsets.UTF_8)
-                    def baos = new ByteArrayOutputStream()
-                    def daos = new DataOutputStream(baos)
-                    daos.writeShort((short) name.length)
-                    daos.write(name)
-                    daos.flush()
-                    String encodedName = Base64.encode(baos.toByteArray())
-                    def obj = [:]
-                    obj.type = "Result"
-                    obj.version = 1
-                    obj.name = encodedName
-                    obj.infohash = Base64.encode(it.getInfoHash().getRoot())
-                    obj.size = it.getFile().length()
-                    obj.pieceSize = FileHasher.getPieceSize(it.getFile().length())
-                    byte [] hashList = it.getInfoHash().getHashList()
-                    def hashListB64 = []
-                    for (int i = 0; i < hashList.length / InfoHash.SIZE; i++) {
-                        System.arraycopy(hashList, InfoHash.SIZE * i, tmp, 0, InfoHash.SIZE)
-                        hashListB64 << Base64.encode(tmp)
-                    }
-                    obj.hashList = hashListB64
+                byte [] tmp = new byte[InfoHash.SIZE]
+                JsonOutput jsonOutput = new JsonOutput()
+                Endpoint endpoint = null;
+                try {
+                    endpoint = connector.connect(target)
+                    DataOutputStream os = new DataOutputStream(endpoint.getOutputStream())
+                    os.write("POST $uuid\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+                    me.write(os)
+                    os.writeShort((short)results.length)
+                    results.each {
+                        byte [] name = it.getFile().getName().getBytes(StandardCharsets.UTF_8)
+                        def baos = new ByteArrayOutputStream()
+                        def daos = new DataOutputStream(baos)
+                        daos.writeShort((short) name.length)
+                        daos.write(name)
+                        daos.flush()
+                        String encodedName = Base64.encode(baos.toByteArray())
+                        def obj = [:]
+                        obj.type = "Result"
+                        obj.version = oobInfohash ? 2 : 1
+                        obj.name = encodedName
+                        obj.infohash = Base64.encode(it.getInfoHash().getRoot())
+                        obj.size = it.getFile().length()
+                        obj.pieceSize = it.getPieceSize()
+                        if (!oobInfohash) {
+                            byte [] hashList = it.getInfoHash().getHashList()
+                            def hashListB64 = []
+                            for (int i = 0; i < hashList.length / InfoHash.SIZE; i++) {
+                                System.arraycopy(hashList, InfoHash.SIZE * i, tmp, 0, InfoHash.SIZE)
+                                hashListB64 << Base64.encode(tmp)
+                            }
+                            obj.hashList = hashListB64
+                        }
 
-                    def json = jsonOutput.toJson(obj)
-                    os.writeShort((short)json.length())
-                    os.write(json.getBytes(StandardCharsets.US_ASCII))
+                        if (it instanceof DownloadedFile)
+                            obj.sources = it.sources.stream().map({dest -> dest.toBase64()}).collect(Collectors.toSet())
+
+                        def json = jsonOutput.toJson(obj)
+                        os.writeShort((short)json.length())
+                        os.write(json.getBytes(StandardCharsets.US_ASCII))
+                    }
+                    os.flush()
+                } finally {
+                    endpoint?.close()
                 }
-                os.flush()
-            } finally {
-                endpoint?.close()
+            } catch (Exception e) {
+                log.log(Level.WARNING, "problem sending results",e)
             }
         }
     }

core/src/main/groovy/com/muwire/core/search/SearchEvent.groovy

@@ -1,10 +1,19 @@
 package com.muwire.core.search
 
 import com.muwire.core.Event
+import com.muwire.core.InfoHash
 
 class SearchEvent extends Event {
 
 	List<String> searchTerms
 	byte [] searchHash
 	UUID uuid
+    boolean oobInfohash
+    
+    String toString() {
+        def infoHash = null
+        if (searchHash != null)
+            infoHash = new InfoHash(searchHash)
+        "searchTerms: $searchTerms searchHash:$infoHash, uuid:$uuid oobInfohash:$oobInfohash"
+    }
 }

core/src/main/groovy/com/muwire/core/search/SearchIndex.groovy

@@ -33,7 +33,10 @@ class SearchIndex {
 	
 	private static String[] split(String source) {
 		source = source.replaceAll(Constants.SPLIT_PATTERN, " ").toLowerCase()
-		source.split(" ")
+		String [] split = source.split(" ")
+        def rv = []
+        split.each { if (it.length() > 0) rv << it }
+        rv.toArray(new String[0])
 	}
 	
 	String[] search(List<String> terms) {
@@ -42,7 +45,7 @@ class SearchIndex {
 		terms.each {
 			Set<String> forWord = keywords.getOrDefault(it,[])
 			if (rv == null) {
-				rv = forWord
+				rv = new HashSet<>(forWord)
 			} else {
 				rv.retainAll(forWord)
 			}

core/src/main/groovy/com/muwire/core/search/SearchManager.groovy

@@ -44,7 +44,7 @@ public class SearchManager {
             log.info("No results for search uuid $event.uuid")
             return
         }
-        resultsSender.sendResults(event.uuid, event.results, target)
+        resultsSender.sendResults(event.uuid, event.results, target, event.searchEvent.oobInfohash)
     }
     
     boolean hasLocalSearch(UUID uuid) {

core/src/main/groovy/com/muwire/core/search/UIResultBatchEvent.groovy

@@ -0,0 +1,8 @@
+package com.muwire.core.search
+
+import com.muwire.core.Event
+
+class UIResultBatchEvent extends Event {
+    UUID uuid
+    UIResultEvent[] results
+}

core/src/main/groovy/com/muwire/core/search/UIResultEvent.groovy

@@ -4,11 +4,19 @@ import com.muwire.core.Event
 import com.muwire.core.InfoHash
 import com.muwire.core.Persona
 
+import net.i2p.data.Destination
+
 class UIResultEvent extends Event {
     Persona sender
+    Set<Destination> sources
     UUID uuid
     String name
     long size
     InfoHash infohash
     int pieceSize
+    
+    @Override
+    public String toString() {
+        super.toString() + "name:$name size:$size sender:${sender.getHumanReadableName()} pieceSize $pieceSize"
+    }
 }

core/src/main/groovy/com/muwire/core/update/UpdateAvailableEvent.groovy

@@ -1,8 +1,10 @@
 package com.muwire.core.update
 
 import com.muwire.core.Event
+import com.muwire.core.InfoHash
 
 class UpdateAvailableEvent extends Event {
     String version
     String signer
+    String infoHash
 }

core/src/main/groovy/com/muwire/core/update/UpdateClient.groovy

@@ -3,7 +3,15 @@ package com.muwire.core.update
 import java.util.logging.Level
 
 import com.muwire.core.EventBus
+import com.muwire.core.InfoHash
 import com.muwire.core.MuWireSettings
+import com.muwire.core.Persona
+import com.muwire.core.download.UIDownloadEvent
+import com.muwire.core.files.FileDownloadedEvent
+import com.muwire.core.files.FileManager
+import com.muwire.core.search.QueryEvent
+import com.muwire.core.search.SearchEvent
+import com.muwire.core.search.UIResultBatchEvent
 
 import groovy.json.JsonOutput
 import groovy.json.JsonSlurper
@@ -13,6 +21,7 @@ import net.i2p.client.I2PSessionMuxedListener
 import net.i2p.client.SendMessageOptions
 import net.i2p.client.datagram.I2PDatagramDissector
 import net.i2p.client.datagram.I2PDatagramMaker
+import net.i2p.data.Base64
 import net.i2p.util.VersionComparator
 
 @Log
@@ -21,28 +30,54 @@ class UpdateClient {
     final I2PSession session
     final String myVersion
     final MuWireSettings settings
+    final FileManager fileManager
+    final Persona me
     
     private final Timer timer
     
     private long lastUpdateCheckTime
     
-    UpdateClient(EventBus eventBus, I2PSession session, String myVersion, MuWireSettings settings) {
+    private volatile InfoHash updateInfoHash
+    private volatile String version, signer
+    private volatile boolean updateDownloading
+    
+    UpdateClient(EventBus eventBus, I2PSession session, String myVersion, MuWireSettings settings, FileManager fileManager, Persona me) {
         this.eventBus = eventBus
         this.session = session
         this.myVersion = myVersion
         this.settings = settings
+        this.fileManager = fileManager
+        this.me = me
         timer = new Timer("update-client",true)
     }
     
     void start() {
         session.addMuxedSessionListener(new Listener(), I2PSession.PROTO_DATAGRAM, 2)
-        timer.schedule({checkUpdate()} as TimerTask, 30000, 60 * 60 * 1000)
+        timer.schedule({checkUpdate()} as TimerTask, 60000, 60 * 60 * 1000)
     }
     
     void stop() {
         timer.cancel()
     }
     
+    void onUIResultBatchEvent(UIResultBatchEvent results) {
+        if (results.results[0].infohash != updateInfoHash)
+            return
+        if (updateDownloading)
+            return
+        updateDownloading = true
+        def file = new File(settings.downloadLocation, results.results[0].name)
+        def downloadEvent = new UIDownloadEvent(result: results.results[0], sources : results.results[0].sources, target : file)
+        eventBus.publish(downloadEvent)
+    }
+ 
+    void onFileDownloadedEvent(FileDownloadedEvent e) {
+        if (e.downloadedFile.infoHash != updateInfoHash)
+            return
+        updateDownloading = false
+        eventBus.publish(new UpdateDownloadedEvent(version : version, signer : signer))
+    }
+    
     private void checkUpdate() {
         final long now = System.currentTimeMillis()
         if (lastUpdateCheckTime > 0) {
@@ -106,8 +141,32 @@ class UpdateClient {
                     return
                 }
                 
-                log.info("new version $payload.version available, publishing event")
-                eventBus.publish(new UpdateAvailableEvent(version : payload.version, signer : payload.signer))
+                String infoHash
+                if (settings.updateType == "jar") {
+                    infoHash = payload.infoHash
+                } else
+                    infoHash = payload[settings.updateType]
+                
+              
+                if (!settings.autoDownloadUpdate) {
+                    log.info("new version $payload.version available, publishing event")
+                    eventBus.publish(new UpdateAvailableEvent(version : payload.version, signer : payload.signer, infoHash : infoHash))
+                } else {
+                    log.info("new version $payload.version available")
+                    updateInfoHash = new InfoHash(Base64.decode(infoHash))
+                    if (fileManager.rootToFiles.containsKey(updateInfoHash))
+                        eventBus.publish(new UpdateDownloadedEvent(version : payload.version, signer : payload.signer))
+                    else {
+                        updateDownloading = false
+                        version = payload.version
+                        signer = payload.signer
+                        log.info("starting search for new version hash $payload.infoHash")
+                        def searchEvent = new SearchEvent(searchHash : updateInfoHash.getRoot(), uuid : UUID.randomUUID(), oobInfohash : true)
+                        def queryEvent = new QueryEvent(searchEvent : searchEvent, firstHop : true, replyTo : me.destination,
+                            receivedOn : me.destination, originator : me)
+                        eventBus.publish(queryEvent)
+                    }
+                }
                 
             } catch (Exception e) {
                 log.log(Level.WARNING,"Invalid datagram",e)

core/src/main/groovy/com/muwire/core/update/UpdateDownloadedEvent.groovy

@@ -0,0 +1,8 @@
+package com.muwire.core.update
+
+import com.muwire.core.Event
+
+class UpdateDownloadedEvent extends Event {
+    String version
+    String signer
+}

core/src/main/groovy/com/muwire/core/upload/ContentRequest.groovy

@@ -0,0 +1,6 @@
+package com.muwire.core.upload
+
+class ContentRequest extends Request {
+    Range range
+    int have
+}

core/src/main/groovy/com/muwire/core/upload/ContentUploader.groovy

@@ -0,0 +1,118 @@
+package com.muwire.core.upload
+
+import java.nio.ByteBuffer
+import java.nio.channels.FileChannel
+import java.nio.charset.StandardCharsets
+import java.nio.file.Files
+import java.nio.file.StandardOpenOption
+import java.util.stream.Collectors
+
+import com.muwire.core.Persona
+import com.muwire.core.connection.Endpoint
+import com.muwire.core.mesh.Mesh
+import com.muwire.core.util.DataUtil
+
+import net.i2p.data.Destination
+
+class ContentUploader extends Uploader {
+    
+    private final File file
+    private final ContentRequest request
+    private final Mesh mesh
+    private final int pieceSize
+    
+    ContentUploader(File file, ContentRequest request, Endpoint endpoint, Mesh mesh, int pieceSize) {
+        super(endpoint)
+        this.file = file
+        this.request = request
+        this.mesh = mesh
+        this.pieceSize = pieceSize
+    }
+    
+    @Override
+    void respond() {
+        OutputStream os = endpoint.getOutputStream()
+        Range range = request.getRange()
+        boolean satisfiable = true
+        final long length = file.length()
+        if (range.start >= length || range.end >= length)
+            satisfiable = false
+        if (satisfiable) {
+            int startPiece = range.start / (0x1 << pieceSize)
+            int endPiece = range.end / (0x1 << pieceSize)
+            for (int i = startPiece; i <= endPiece; i++)
+                satisfiable &= mesh.pieces.isDownloaded(i)
+        }
+        if (!satisfiable) {
+            os.write("416 Range Not Satisfiable\r\n".getBytes(StandardCharsets.US_ASCII))
+            writeMesh(request.downloader)
+            os.write("\r\n".getBytes(StandardCharsets.US_ASCII))
+            os.flush()
+            return
+        }
+
+        os.write("200 OK\r\n".getBytes(StandardCharsets.US_ASCII))
+        os.write("Content-Range: $range.start-$range.end\r\n".getBytes(StandardCharsets.US_ASCII))
+        writeMesh(request.downloader)
+        os.write("\r\n".getBytes(StandardCharsets.US_ASCII))
+        
+        FileChannel channel
+        try {
+            channel = Files.newByteChannel(file.toPath(), EnumSet.of(StandardOpenOption.READ))
+            mapped = channel.map(FileChannel.MapMode.READ_ONLY, range.start, range.end - range.start + 1)
+            byte [] tmp = new byte[0x1 << 13]
+            while(mapped.hasRemaining()) {
+                int start = mapped.position()
+                synchronized(this) {
+                    mapped.get(tmp, 0, Math.min(tmp.length, mapped.remaining()))
+                }
+                int read = mapped.position() - start
+                endpoint.getOutputStream().write(tmp, 0, read)
+            }
+        } finally {
+            try {channel?.close() } catch (IOException ignored) {}
+            endpoint.getOutputStream().flush()
+        }
+    }
+    
+    private void writeMesh(Persona toExclude) {
+        String xHave = DataUtil.encodeXHave(mesh.pieces.getDownloaded(), mesh.pieces.nPieces)
+        endpoint.getOutputStream().write("X-Have: $xHave\r\n".getBytes(StandardCharsets.US_ASCII))
+        
+        Set<Persona> sources = mesh.getRandom(3, toExclude)
+        if (!sources.isEmpty()) {
+            String xAlts = sources.stream().map({ it.toBase64() }).collect(Collectors.joining(","))
+            endpoint.getOutputStream().write("X-Alt: $xAlts\r\n".getBytes(StandardCharsets.US_ASCII))
+        }
+    }
+
+    @Override
+    public String getName() {
+        return file.getName();
+    }
+
+    @Override
+    public synchronized int getProgress() {
+        if (mapped == null)
+            return 0
+        int position = mapped.position()
+        int total = request.getRange().end - request.getRange().start
+        (int)(position * 100.0 / total)
+    }
+
+    @Override
+    public String getDownloader() {
+        request.downloader.getHumanReadableName()
+    }
+
+    @Override
+    public int getDonePieces() {
+        return request.have;
+    }
+
+    @Override
+    public int getTotalPieces() {
+        return mesh.pieces.nPieces;
+    }
+
+}

core/src/main/groovy/com/muwire/core/upload/HashListRequest.groovy

@@ -0,0 +1,4 @@
+package com.muwire.core.upload
+
+class HashListRequest extends Request {
+}

core/src/main/groovy/com/muwire/core/upload/HashListUploader.groovy

@@ -0,0 +1,65 @@
+package com.muwire.core.upload
+
+import java.nio.ByteBuffer
+import java.nio.charset.StandardCharsets
+
+import com.muwire.core.InfoHash
+import com.muwire.core.connection.Endpoint
+
+import net.i2p.data.Base64
+
+class HashListUploader extends Uploader {
+    private final InfoHash infoHash
+    private final HashListRequest request
+    
+    HashListUploader(Endpoint endpoint, InfoHash infoHash, HashListRequest request) {
+        super(endpoint)
+        this.infoHash = infoHash
+        mapped = ByteBuffer.wrap(infoHash.getHashList())
+        this.request = request
+    }
+    
+    void respond() {
+        OutputStream os = endpoint.getOutputStream()
+        os.write("200 OK\r\n".getBytes(StandardCharsets.US_ASCII))
+        os.write("Content-Range: 0-${mapped.remaining()}\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+        
+        byte[]tmp = new byte[0x1 << 13]
+        while(mapped.hasRemaining()) {
+            int start = mapped.position()
+            synchronized(this) {
+                mapped.get(tmp, 0, Math.min(tmp.length, mapped.remaining()))
+            }
+            int read = mapped.position() - start
+            endpoint.getOutputStream().write(tmp, 0, read)
+        }
+        endpoint.getOutputStream().flush()
+    }
+
+    @Override
+    public String getName() {
+        return "Hash list for " + Base64.encode(infoHash.getRoot());
+    }
+
+    @Override
+    public synchronized int getProgress() {
+        (int)(mapped.position() * 100.0 / mapped.capacity())
+    }
+
+    @Override
+    public String getDownloader() {
+        request.downloader.getHumanReadableName()
+    }
+
+    @Override
+    public int getDonePieces() {
+        return 0;
+    }
+
+    @Override
+    public int getTotalPieces() {
+        return 1;
+    }
+    
+    
+}

core/src/main/groovy/com/muwire/core/upload/Request.groovy

@@ -5,6 +5,7 @@ import java.nio.charset.StandardCharsets
 import com.muwire.core.Constants
 import com.muwire.core.InfoHash
 import com.muwire.core.Persona
+import com.muwire.core.util.DataUtil
 
 import groovy.util.logging.Log
 import net.i2p.data.Base64
@@ -16,57 +17,12 @@ class Request {
     private static final byte N = "\n".getBytes(StandardCharsets.US_ASCII)[0]
     
     InfoHash infoHash
-    Range range
     Persona downloader
     Map<String, String> headers
     
-    static Request parse(InfoHash infoHash, InputStream is) throws IOException {
-        Map<String,String> headers = new HashMap<>()
-        byte [] tmp = new byte[Constants.MAX_HEADER_SIZE]
-        while(headers.size() < Constants.MAX_HEADERS) {
-            boolean r = false
-            boolean n = false
-            int idx = 0
-            while (true) {
-                byte read = is.read()
-                if (read == -1)
-                    throw new IOException("Stream closed")
-                    
-                if (!r && read == N)
-                    throw new IOException("Received N before R")
-                if (read == R) {
-                    if (r) 
-                        throw new IOException("double R")
-                    r = true
-                    continue
-                }
-                
-                if (r && !n) {
-                    if (read != N) 
-                        throw new IOException("R not followed by N")
-                    n = true
-                    break
-                }
-                if (idx == 0x1 << 14)
-                    throw new IOException("Header too long")    
-                tmp[idx++] = read
-            }
-            
-            if (idx == 0)
-                break
-                
-            String header = new String(tmp, 0, idx, StandardCharsets.US_ASCII)
-            log.fine("Read header $header")
-            
-            int keyIdx = header.indexOf(":")
-            if (keyIdx < 1)
-                throw new IOException("Header key not found")
-            if (keyIdx == header.length())
-                throw new IOException("Header value not found")
-            String key = header.substring(0, keyIdx)
-            String value = header.substring(keyIdx + 1)
-            headers.put(key, value)
-        }
+    static Request parseContentRequest(InfoHash infoHash, InputStream is) throws IOException {
+        
+        Map<String, String> headers = parseHeaders(is)
         
         if (!headers.containsKey("Range"))
             throw new IOException("Range header not found")
@@ -93,7 +49,75 @@ class Request {
             def decoded = Base64.decode(encoded)
             downloader = new Persona(new ByteArrayInputStream(decoded))
         }
-        new Request( infoHash : infoHash, range : new Range(start, end), headers : headers, downloader : downloader)
+        
+        int have = 0
+        if (headers.containsKey("X-Have")) {
+            def encoded = headers["X-Have"].trim()
+            have = DataUtil.decodeXHave(encoded).size()
+        }
+        new ContentRequest( infoHash : infoHash, range : new Range(start, end), 
+            headers : headers, downloader : downloader, have : have)
+    }
+    
+    static Request parseHashListRequest(InfoHash infoHash, InputStream is) throws IOException {
+        Map<String,String> headers = parseHeaders(is)
+        Persona downloader = null
+        if (headers.containsKey("X-Persona")) {
+            def encoded = headers["X-Persona"].trim()
+            def decoded = Base64.decode(encoded)
+            downloader = new Persona(new ByteArrayInputStream(decoded))
+        }
+        new HashListRequest(infoHash : infoHash, headers : headers, downloader : downloader)
+    }
+    
+    private static Map<String, String> parseHeaders(InputStream is) {
+        Map<String,String> headers = new HashMap<>()
+        byte [] tmp = new byte[Constants.MAX_HEADER_SIZE]
+        while(headers.size() < Constants.MAX_HEADERS) {
+            boolean r = false
+            boolean n = false
+            int idx = 0
+            while (true) {
+                byte read = is.read()
+                if (read == -1)
+                    throw new IOException("Stream closed")
+                    
+                if (!r && read == N)
+                    throw new IOException("Received N before R")
+                if (read == R) {
+                    if (r)
+                        throw new IOException("double R")
+                    r = true
+                    continue
+                }
+                
+                if (r && !n) {
+                    if (read != N)
+                        throw new IOException("R not followed by N")
+                    n = true
+                    break
+                }
+                if (idx == 0x1 << 14)
+                    throw new IOException("Header too long")
+                tmp[idx++] = read
+            }
+            
+            if (idx == 0)
+                break
+                
+            String header = new String(tmp, 0, idx, StandardCharsets.US_ASCII)
+            log.fine("Read header $header")
+            
+            int keyIdx = header.indexOf(":")
+            if (keyIdx < 1)
+                throw new IOException("Header key not found")
+            if (keyIdx == header.length())
+                throw new IOException("Header value not found")
+            String key = header.substring(0, keyIdx)
+            String value = header.substring(keyIdx + 1)
+            headers.put(key, value)
+        }
+        headers
     }
     
 }

core/src/main/groovy/com/muwire/core/upload/UploadManager.groovy

@@ -6,7 +6,12 @@ import com.muwire.core.EventBus
 import com.muwire.core.InfoHash
 import com.muwire.core.SharedFile
 import com.muwire.core.connection.Endpoint
+import com.muwire.core.download.DownloadManager
+import com.muwire.core.download.Downloader
+import com.muwire.core.download.SourceDiscoveredEvent
 import com.muwire.core.files.FileManager
+import com.muwire.core.mesh.Mesh
+import com.muwire.core.mesh.MeshManager
 
 import groovy.util.logging.Log
 import net.i2p.data.Base64
@@ -15,17 +20,22 @@ import net.i2p.data.Base64
 public class UploadManager {
     private final EventBus eventBus
     private final FileManager fileManager
+    private final MeshManager meshManager
+    private final DownloadManager downloadManager
     
     public UploadManager() {}
     
-    public UploadManager(EventBus eventBus, FileManager fileManager) {
+    public UploadManager(EventBus eventBus, FileManager fileManager, 
+        MeshManager meshManager, DownloadManager downloadManager) {
         this.eventBus = eventBus
         this.fileManager = fileManager
+        this.meshManager = meshManager
+        this.downloadManager = downloadManager
     }
     
-    public void processEndpoint(Endpoint e) throws IOException {
+    public void processGET(Endpoint e) throws IOException {
         byte [] infoHashStringBytes = new byte[44]
-                DataInputStream dis = new DataInputStream(e.getInputStream())
+        DataInputStream dis = new DataInputStream(e.getInputStream())
         boolean first = true
         while(true) {
             if (first)
@@ -44,8 +54,10 @@ public class UploadManager {
             log.info("Responding to upload request for root $infoHashString")
 
             byte [] infoHashRoot = Base64.decode(infoHashString)
+            InfoHash infoHash = new InfoHash(infoHashRoot)
             Set<SharedFile> sharedFiles = fileManager.getSharedFiles(infoHashRoot)
-            if (sharedFiles == null || sharedFiles.isEmpty()) {
+            Downloader downloader = downloadManager.downloaders.get(infoHash)
+            if (downloader == null && (sharedFiles == null || sharedFiles.isEmpty())) {
                 log.info "file not found"
                 e.getOutputStream().write("404 File Not Found\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
                 e.getOutputStream().flush()
@@ -61,13 +73,31 @@ public class UploadManager {
                 return
             }
 
-            Request request = Request.parse(new InfoHash(infoHashRoot), e.getInputStream())
+            ContentRequest request = Request.parseContentRequest(infoHash, e.getInputStream())
             if (request.downloader != null && request.downloader.destination != e.destination) {
                 log.info("Downloader persona doesn't match their destination")
                 e.close()
                 return
             }
-            Uploader uploader = new Uploader(sharedFiles.iterator().next().file, request, e)
+            
+            if (request.have > 0) 
+                eventBus.publish(new SourceDiscoveredEvent(infoHash : request.infoHash, source : request.downloader))
+            
+            Mesh mesh
+            File file
+            int pieceSize
+            if (downloader != null) {
+                mesh = meshManager.get(infoHash)
+                file = downloader.incompleteFile
+                pieceSize = downloader.pieceSizePow2
+            } else {
+                SharedFile sharedFile = sharedFiles.iterator().next();
+                mesh = meshManager.getOrCreate(request.infoHash, sharedFile.NPieces)
+                file = sharedFile.file
+                pieceSize = sharedFile.pieceSize
+            }
+                
+            Uploader uploader = new ContentUploader(file, request, e, mesh, pieceSize)
             eventBus.publish(new UploadEvent(uploader : uploader))
             try {
                 uploader.respond()
@@ -75,7 +105,131 @@ public class UploadManager {
                 eventBus.publish(new UploadFinishedEvent(uploader : uploader))
             }
         }
+    }
+    
+    public void processHashList(Endpoint e) {
+        byte [] infoHashStringBytes = new byte[44]
+        DataInputStream dis = new DataInputStream(e.getInputStream())
+        dis.readFully(infoHashStringBytes)
+        String infoHashString = new String(infoHashStringBytes, StandardCharsets.US_ASCII)
+        log.info("Responding to hashlist request for root $infoHashString")
         
+        byte [] infoHashRoot = Base64.decode(infoHashString)
+        InfoHash infoHash = new InfoHash(infoHashRoot)
+        Downloader downloader = downloadManager.downloaders.get(infoHash)
+        Set<SharedFile> sharedFiles = fileManager.getSharedFiles(infoHashRoot)
+        if (downloader == null && (sharedFiles == null || sharedFiles.isEmpty())) {
+            log.info "file not found"
+            e.getOutputStream().write("404 File Not Found\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+            e.getOutputStream().flush()
+            e.close()
+            return
+        }
+        
+        byte [] rn = new byte[2]
+        dis.readFully(rn)
+        if (rn != "\r\n".getBytes(StandardCharsets.US_ASCII)) {
+            log.warning("Malformed HASHLIST header")
+            e.close()
+            return
+        }
+        
+        Request request = Request.parseHashListRequest(infoHash, e.getInputStream())
+        if (request.downloader != null && request.downloader.destination != e.destination) {
+            log.info("Downloader persona doesn't match their destination")
+            e.close()
+            return
+        }
+        
+        InfoHash fullInfoHash
+        if (downloader == null) {
+            fullInfoHash = sharedFiles.iterator().next().infoHash
+        } else {
+            byte [] hashList = downloader.getInfoHash().getHashList()
+            if (hashList != null && hashList.length > 0)
+                fullInfoHash = downloader.getInfoHash()
+            else {
+                log.info("infohash not found in downloader")
+                e.getOutputStream().write("404 File Not Found\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+                e.getOutputStream().flush()
+                e.close()
+                return
+            }
+        }
+        
+        Uploader uploader = new HashListUploader(e, fullInfoHash, request)
+        eventBus.publish(new UploadEvent(uploader : uploader))
+        try {
+            uploader.respond()
+        } finally {
+            eventBus.publish(new UploadFinishedEvent(uploader : uploader))
+        }
+        
+        // proceed with content
+        while(true) {
+            byte[] get = new byte[4]
+            dis.readFully(get)
+            if (get != "GET ".getBytes(StandardCharsets.US_ASCII)) {
+                log.warning("received a method other than GET on subsequent call")
+                e.close()
+                return
+            }
+            dis.readFully(infoHashStringBytes)
+            infoHashString = new String(infoHashStringBytes, StandardCharsets.US_ASCII)
+            log.info("Responding to upload request for root $infoHashString")
+
+            infoHashRoot = Base64.decode(infoHashString)
+            infoHash = new InfoHash(infoHashRoot)
+            sharedFiles = fileManager.getSharedFiles(infoHashRoot)
+            downloader = downloadManager.downloaders.get(infoHash)
+            if (downloader == null && (sharedFiles == null || sharedFiles.isEmpty())) {
+                log.info "file not found"
+                e.getOutputStream().write("404 File Not Found\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+                e.getOutputStream().flush()
+                e.close()
+                return
+            }
+
+            rn = new byte[2]
+            dis.readFully(rn)
+            if (rn != "\r\n".getBytes(StandardCharsets.US_ASCII)) {
+                log.warning("Malformed GET header")
+                e.close()
+                return
+            }
+
+            request = Request.parseContentRequest(new InfoHash(infoHashRoot), e.getInputStream())
+            if (request.downloader != null && request.downloader.destination != e.destination) {
+                log.info("Downloader persona doesn't match their destination")
+                e.close()
+                return
+            }
+            
+            if (request.have > 0)
+                eventBus.publish(new SourceDiscoveredEvent(infoHash : request.infoHash, source : request.downloader))
+            
+            Mesh mesh
+            File file
+            int pieceSize
+            if (downloader != null) {
+                mesh = meshManager.get(infoHash)
+                file = downloader.incompleteFile
+                pieceSize = downloader.pieceSizePow2
+            } else {
+                SharedFile sharedFile = sharedFiles.iterator().next();
+                mesh = meshManager.getOrCreate(request.infoHash, sharedFile.NPieces)
+                file = sharedFile.file
+                pieceSize = sharedFile.pieceSize
+            }
+
+            uploader = new ContentUploader(file, request, e, mesh, pieceSize)
+            eventBus.publish(new UploadEvent(uploader : uploader))
+            try {
+                uploader.respond()
+            } finally {
+                eventBus.publish(new UploadFinishedEvent(uploader : uploader))
+            }
+        }
     }
 }
 

core/src/main/groovy/com/muwire/core/upload/Uploader.groovy

@@ -8,52 +8,32 @@ import java.nio.file.StandardOpenOption
 
 import com.muwire.core.connection.Endpoint
 
-class Uploader {
-    private final File file
-    private final Request request
-    private final Endpoint endpoint
-    private ByteBuffer mapped
+abstract class Uploader {
+    protected final Endpoint endpoint
+    protected ByteBuffer mapped
     
-    Uploader(File file, Request request, Endpoint endpoint) {
-        this.file = file
-        this.request = request
+    Uploader(Endpoint endpoint) {
         this.endpoint = endpoint
     }
     
-    void respond() {
-        OutputStream os = endpoint.getOutputStream()
-        Range range = request.getRange()
-        if (range.start >= file.length() || range.end >= file.length()) {
-            os.write("416 Range Not Satisfiable\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
-            os.flush()
-            return
-        }
-
-        os.write("200 OK\r\n".getBytes(StandardCharsets.US_ASCII))
-        os.write("Content-Range: $range.start-$range.end\r\n\r\n".getBytes(StandardCharsets.US_ASCII))        
-
-        FileChannel channel
-        try {
-            channel = Files.newByteChannel(file.toPath(), EnumSet.of(StandardOpenOption.READ))
-            mapped = channel.map(FileChannel.MapMode.READ_ONLY, range.start, range.end - range.start + 1)
-            byte [] tmp = new byte[0x1 << 13]
-            while(mapped.hasRemaining()) {
-                int start = mapped.position()
-                synchronized(this) {
-                    mapped.get(tmp, 0, Math.min(tmp.length, mapped.remaining()))
-                }
-                int read = mapped.position() - start
-                endpoint.getOutputStream().write(tmp, 0, read)
-            }
-        } finally {
-            try {channel?.close() } catch (IOException ignored) {}
-            endpoint.getOutputStream().flush()
-        }     
-    }
-    
+    abstract void respond()
+        
     public synchronized int getPosition() {
         if (mapped == null)
             return -1
         mapped.position()
     }
+    
+    abstract String getName();
+    
+    /**
+     * @return an integer between 0 and 100
+     */
+    abstract int getProgress();
+    
+    abstract String getDownloader();
+    
+    abstract int getDonePieces();
+    
+    abstract int getTotalPieces()
 }

core/src/main/groovy/com/muwire/core/util/DataUtil.groovy

@@ -4,6 +4,8 @@ import java.nio.charset.StandardCharsets
 
 import com.muwire.core.Constants
 
+import net.i2p.data.Base64
+
 class DataUtil {
 	
 	private final static int MAX_SHORT = (0x1 << 16) - 1
@@ -79,4 +81,38 @@ class DataUtil {
         }
         new String(baos.toByteArray(), StandardCharsets.US_ASCII)
     }
+    
+    public static String encodeXHave(List<Integer> pieces, int totalPieces) {
+        int bytes = totalPieces / 8
+        if (totalPieces % 8 != 0)
+            bytes++
+        byte[] raw = new byte[bytes]
+        pieces.each {
+            int byteIdx = it / 8
+            int offset = it % 8
+            int mask = 0x80 >>> offset
+            raw[byteIdx] |= mask
+        }
+        Base64.encode(raw)
+    }
+    
+    public static List<Integer> decodeXHave(String xHave) {
+        byte [] availablePieces = Base64.decode(xHave)
+        List<Integer> available = new ArrayList<>()
+        availablePieces.eachWithIndex {b, i ->
+            for (int j = 0; j < 8 ; j++) {
+                byte mask = 0x80 >>> j
+                if ((b & mask) == mask) {
+                    available.add(i * 8 + j)
+                }
+            }
+        }
+        available
+    }
+    
+    public static Exception findRoot(Exception e) {
+        while(e.getCause() != null)
+            e = e.getCause()
+        e
+    }
 }

core/src/main/groovy/com/muwire/core/util/JULLog.groovy

@@ -55,21 +55,21 @@ class JULLog extends Log {
 
     @Override
     public boolean shouldDebug() {
-        level.intValue().intValue() >= Level.FINE.intValue()
+        level.intValue().intValue() <= Level.FINE.intValue()
     }
 
     @Override
     public boolean shouldInfo() {
-        level.intValue().intValue() >= Level.INFO.intValue()
+        level.intValue().intValue() <= Level.INFO.intValue()
     }
 
     @Override
     public boolean shouldWarn() {
-        level.intValue().intValue() >= Level.WARNING.intValue()
+        level.intValue().intValue() <= Level.WARNING.intValue()
     }
 
     @Override
     public boolean shouldError() {
-        level.intValue().intValue() >= Level.SEVERE.intValue()
+        level.intValue().intValue() <= Level.SEVERE.intValue()
     }
 }

core/src/main/java/com/muwire/core/DownloadedFile.java

@@ -1,6 +1,7 @@
 package com.muwire.core;
 
 import java.io.File;
+import java.io.IOException;
 import java.util.Set;
 
 import net.i2p.data.Destination;
@@ -9,8 +10,9 @@ public class DownloadedFile extends SharedFile {
 	
 	private final Set<Destination> sources;
 
-	public DownloadedFile(File file, InfoHash infoHash, Set<Destination> sources) {
-		super(file, infoHash);
+	public DownloadedFile(File file, InfoHash infoHash, int pieceSize, Set<Destination> sources) 
+	throws IOException {
+		super(file, infoHash, pieceSize);
 		this.sources = sources;
 	}
 	

core/src/main/java/com/muwire/core/InfoHash.java

@@ -7,6 +7,7 @@ import java.util.Arrays;
 import java.util.List;
 
 import net.i2p.data.Base32;
+import net.i2p.data.Base64;
 
 public class InfoHash {
 
@@ -76,14 +77,16 @@ public class InfoHash {
 	}
 	
 	public String toString() {
-		String rv = "InfoHash[root:"+Base32.encode(root) + " hashList:";
-		List<String> b32HashList = new ArrayList<>(hashList.length / SIZE);
-		byte [] tmp = new byte[SIZE];
-		for (int i = 0; i < hashList.length / SIZE; i++) {
-			System.arraycopy(hashList, SIZE * i, tmp, 0, SIZE);
-			b32HashList.add(Base32.encode(tmp));
+		String rv = "InfoHash[root:"+Base64.encode(root) + " hashList:";
+		List<String> b64HashList = new ArrayList<>();
+		if (hashList != null) {       
+		    byte [] tmp = new byte[SIZE];
+		    for (int i = 0; i < hashList.length / SIZE; i++) {
+		        System.arraycopy(hashList, SIZE * i, tmp, 0, SIZE);
+		        b64HashList.add(Base64.encode(tmp));
+		    }
 		}
-		rv += b32HashList.toString();
+		rv += b64HashList.toString();
 		rv += "]";
 		return rv;
 	}

core/src/main/java/com/muwire/core/SharedFile.java

@@ -1,15 +1,23 @@
 package com.muwire.core;
 
 import java.io.File;
+import java.io.IOException;
 
 public class SharedFile {
 
 	private final File file;
 	private final InfoHash infoHash;
+	private final int pieceSize;
 	
-	public SharedFile(File file, InfoHash infoHash) {
+	private final String cachedPath;
+	private final long cachedLength;
+	
+	public SharedFile(File file, InfoHash infoHash, int pieceSize) throws IOException {
 		this.file = file;
 		this.infoHash = infoHash;
+		this.pieceSize = pieceSize;
+		this.cachedPath = file.getAbsolutePath();
+		this.cachedLength = file.length();
 	}
 
 	public File getFile() {
@@ -20,4 +28,37 @@ public class SharedFile {
 		return infoHash;
 	}
 	
+	public int getPieceSize() {
+	    return pieceSize;
+	}
+	
+	public int getNPieces() {
+	    long length = file.length();
+	    int rawPieceSize = 0x1 << pieceSize;
+	    int rv = (int) (length / rawPieceSize);
+	    if (length % rawPieceSize != 0)
+	        rv++;
+	    return rv;
+	}
+	
+	public String getCachedPath() {
+	    return cachedPath;
+	}
+	
+	public long getCachedLength() {
+	    return cachedLength;
+	}
+	
+	@Override
+	public int hashCode() {
+	    return file.hashCode() ^ infoHash.hashCode();
+	}
+	
+	@Override
+	public boolean equals(Object o) {
+	    if (!(o instanceof SharedFile))
+	        return false;
+	    SharedFile other = (SharedFile)o;
+	    return file.equals(other.file) && infoHash.equals(other.infoHash);
+	}
 }

core/src/test/groovy/com/muwire/core/connection/ConnectionAcceptorTest.groovy

@@ -43,6 +43,9 @@ class ConnectionAcceptorTest {
     
     def uploadManagerMock
     UploadManager uploadManager
+    
+    def connectionEstablisherMock
+    ConnectionEstablisher connectionEstablisher
 	
 	ConnectionAcceptor acceptor
 	List<ConnectionEvent> connectionEvents
@@ -57,6 +60,7 @@ class ConnectionAcceptorTest {
 		trustServiceMock = new MockFor(TrustService.class)
         searchManagerMock = new MockFor(SearchManager.class)
         uploadManagerMock = new MockFor(UploadManager.class)
+        connectionEstablisherMock = new MockFor(ConnectionEstablisher.class)
 	}
 	
 	@After
@@ -68,6 +72,7 @@ class ConnectionAcceptorTest {
 		trustServiceMock.verify trustService
         searchManagerMock.verify searchManager
         uploadManagerMock.verify uploadManager
+        connectionEstablisherMock.verify connectionEstablisher
 		Thread.sleep(100)
 	}
 	
@@ -87,8 +92,10 @@ class ConnectionAcceptorTest {
 		trustService = trustServiceMock.proxyInstance()
         searchManager = searchManagerMock.proxyInstance()
         uploadManager = uploadManagerMock.proxyInstance()
+        connectionEstablisher = connectionEstablisherMock.proxyInstance()
 		
-		acceptor = new ConnectionAcceptor(eventBus, connectionManager, settings, i2pAcceptor, hostCache, trustService, searchManager, uploadManager)
+		acceptor = new ConnectionAcceptor(eventBus, connectionManager, settings, i2pAcceptor, 
+            hostCache, trustService, searchManager, uploadManager, connectionEstablisher)
 		acceptor.start()
 		Thread.sleep(100)
 	}
@@ -108,6 +115,7 @@ class ConnectionAcceptorTest {
 			new Endpoint(destinations.dest1, is, os, null)
 		}
 		i2pAcceptorMock.demand.accept { Thread.sleep(Integer.MAX_VALUE) }
+        connectionEstablisherMock.demand.isInProgress(destinations.dest1) { false }
         connectionManagerMock.demand.isConnected { dest ->
             assert dest == destinations.dest1
             false
@@ -150,6 +158,7 @@ class ConnectionAcceptorTest {
 			new Endpoint(destinations.dest1, is, os, null)
 		}
 		i2pAcceptorMock.demand.accept { Thread.sleep(Integer.MAX_VALUE) }
+        connectionEstablisherMock.demand.isInProgress(destinations.dest1) { false }
         connectionManagerMock.demand.isConnected { dest ->
             assert dest == destinations.dest1
             false
@@ -264,6 +273,7 @@ class ConnectionAcceptorTest {
 			new Endpoint(destinations.dest1, is, os, null)
 		}
 		i2pAcceptorMock.demand.accept { Thread.sleep(Integer.MAX_VALUE) }
+        connectionEstablisherMock.demand.isInProgress(destinations.dest1) { false }
         connectionManagerMock.demand.isConnected { dest ->
             assert dest == destinations.dest1
             false
@@ -310,6 +320,7 @@ class ConnectionAcceptorTest {
 			new Endpoint(destinations.dest1, is, os, null)
 		}
 		i2pAcceptorMock.demand.accept { Thread.sleep(Integer.MAX_VALUE) }
+        connectionEstablisherMock.demand.isInProgress(destinations.dest1) { false }
         connectionManagerMock.demand.isConnected { dest ->
             assert dest == destinations.dest1
             false
@@ -356,6 +367,7 @@ class ConnectionAcceptorTest {
 			new Endpoint(destinations.dest1, is, os, null)
 		}
 		i2pAcceptorMock.demand.accept { Thread.sleep(Integer.MAX_VALUE) }
+        connectionEstablisherMock.demand.isInProgress(destinations.dest1) { false }
         connectionManagerMock.demand.isConnected { dest ->
             assert dest == destinations.dest1
             false

core/src/test/groovy/com/muwire/core/download/DownloadSessionTest.groovy

@@ -1,21 +1,30 @@
 package com.muwire.core.download
 
+import static org.junit.Assert.fail
+
 import org.junit.After
+import org.junit.Before
 import org.junit.Test
 
+import com.muwire.core.EventBus
 import com.muwire.core.InfoHash
+import com.muwire.core.Persona
+import com.muwire.core.Personas
 import com.muwire.core.connection.Endpoint
 import com.muwire.core.files.FileHasher
 import static com.muwire.core.util.DataUtil.readTillRN
+import static com.muwire.core.util.DataUtil.encodeXHave
 
 import net.i2p.data.Base64
+import net.i2p.util.ConcurrentHashSet
 
 class DownloadSessionTest {
     
+    private EventBus eventBus
     private File source, target
     private InfoHash infoHash
     private Endpoint endpoint
-    private Pieces pieces, claimed
+    private Pieces pieces
     private String rootBase64
     
     private DownloadSession session
@@ -24,6 +33,16 @@ class DownloadSessionTest {
     private InputStream fromDownloader, fromUploader
     private OutputStream toDownloader, toUploader
     
+    private volatile boolean performed
+    private Set<Integer> available = new ConcurrentHashSet<>()
+    private volatile IOException thrown
+    
+    
+    @Before
+    public void setUp() {
+        eventBus = new EventBus()
+    }
+    
     private void initSession(int size, def claimedPieces = []) {
         Random r = new Random()
         byte [] content = new byte[size]
@@ -48,8 +67,7 @@ class DownloadSessionTest {
         else
             nPieces = size / pieceSize + 1
         pieces = new Pieces(nPieces)
-        claimed = new Pieces(nPieces)
-        claimedPieces.each {claimed.markDownloaded(it)}
+        claimedPieces.each {pieces.claimed.set(it)}
         
         fromDownloader = new PipedInputStream()
         fromUploader = new PipedInputStream()
@@ -57,12 +75,20 @@ class DownloadSessionTest {
         toUploader = new PipedOutputStream(fromDownloader)
         endpoint = new Endpoint(null, fromUploader, toUploader, null)
         
-        session = new DownloadSession("",pieces, claimed, infoHash, endpoint, target, pieceSize, size)
-        downloadThread = new Thread( { session.request() } as Runnable)
+        session = new DownloadSession(eventBus, "",pieces, infoHash, endpoint, target, pieceSize, size, available)
+        downloadThread = new Thread( { perform() } as Runnable)
         downloadThread.setDaemon(true)
         downloadThread.start()
     }
     
+    private void perform() {
+        try { 
+            performed = session.request()
+        } catch (IOException e) {
+            thrown = e
+        }
+    }
+    
     @After
     public void teardown() {
         source?.delete()
@@ -77,6 +103,7 @@ class DownloadSessionTest {
         assert "GET $rootBase64" == readTillRN(fromDownloader)
         assert "Range: 0-19" == readTillRN(fromDownloader)
         readTillRN(fromDownloader)
+        readTillRN(fromDownloader)
         assert "" == readTillRN(fromDownloader)
         
         toDownloader.write("200 OK\r\n".bytes)
@@ -88,6 +115,9 @@ class DownloadSessionTest {
         
         assert pieces.isComplete()
         assert target.bytes == source.bytes
+        assert performed
+        assert available.isEmpty()
+        assert thrown == null
     }
     
     @Test
@@ -99,6 +129,7 @@ class DownloadSessionTest {
         assert "GET $rootBase64" == readTillRN(fromDownloader)
         readTillRN(fromDownloader)
         readTillRN(fromDownloader)
+        readTillRN(fromDownloader)
         assert "" == readTillRN(fromDownloader)
         
         toDownloader.write("200 OK\r\n".bytes)
@@ -109,6 +140,9 @@ class DownloadSessionTest {
         Thread.sleep(150)
         assert pieces.isComplete()
         assert target.bytes == source.bytes
+        assert performed
+        assert available.isEmpty()
+        assert thrown == null
     }
     
     @Test
@@ -126,6 +160,7 @@ class DownloadSessionTest {
         assert (start == 0 && end == ((1 << pieceSize) - 1)) || 
             (start == (1 << pieceSize) && end == (1 << pieceSize))
         
+        readTillRN(fromDownloader)
         readTillRN(fromDownloader)
         assert "" == readTillRN(fromDownloader)
         
@@ -139,6 +174,9 @@ class DownloadSessionTest {
         Thread.sleep(150)
         assert !pieces.isComplete()
         assert 1 == pieces.donePieces()
+        assert performed
+        assert available.isEmpty()
+        assert thrown == null
     }
     
     @Test
@@ -146,7 +184,10 @@ class DownloadSessionTest {
         initSession(20, [0])
         long now = System.currentTimeMillis()
         downloadThread.join(100)
-        assert 100 > (System.currentTimeMillis() - now)
+        assert 100 >= (System.currentTimeMillis() - now)
+        assert !performed
+        assert available.isEmpty()
+        assert thrown == null
     }
     
     @Test
@@ -154,7 +195,7 @@ class DownloadSessionTest {
         int pieceSize = FileHasher.getPieceSize(1)
         int size = (1 << pieceSize) * 10
         initSession(size, [1,2,3,4,5,6,7,8,9])
-        assert !claimed.isMarked(0)
+        assert !pieces.claimed.get(0)
         
         assert "GET $rootBase64" == readTillRN(fromDownloader)
         String range = readTillRN(fromDownloader)
@@ -162,7 +203,131 @@ class DownloadSessionTest {
         int start = Integer.parseInt(matcher[0][1])
         int end = Integer.parseInt(matcher[0][2])
         
-        assert claimed.isMarked(0)
+        assert pieces.claimed.get(0)
         assert start == 0 && end == (1 << pieceSize) - 1
     }
+    
+    @Test
+    public void test416NoHave() {
+        initSession(20)
+        readAllHeaders(fromDownloader)
+        
+        toDownloader.write("416 don't have it\r\n\r\n".bytes)
+        toDownloader.flush()
+        Thread.sleep(150)
+        assert !performed
+        assert available.isEmpty()
+        assert thrown != null
+    }
+    
+    @Test
+    public void test416Have() {
+        initSession(20)
+        readAllHeaders(fromDownloader)
+        
+        toDownloader.write("416 don't have it\r\n".bytes)
+        toDownloader.write("X-Have: ${encodeXHave([0], 1)}\r\n\r\n".bytes)
+        toDownloader.flush()
+        
+        Thread.sleep(150)
+        assert performed
+        assert available.contains(0)
+        assert thrown == null
+    }
+    
+    @Test
+    public void test416Have2Pieces() {
+        int pieceSize = FileHasher.getPieceSize(1)
+        int size = (1 << pieceSize) + 1
+        initSession(size)
+        readAllHeaders(fromDownloader)
+        
+        toDownloader.write("416 don't have it\r\n".bytes)
+        toDownloader.write("X-Have: ${encodeXHave([1], 2)}\r\n\r\n".bytes)
+        toDownloader.flush()
+        
+        Thread.sleep(150)
+        assert performed
+        assert available.contains(1)
+        assert thrown == null
+    }
+    
+    @Test
+    public void test200TwoPieces1Available() {
+        int pieceSize = FileHasher.getPieceSize(1)
+        int size = (1 << pieceSize) * 9 + 1
+        initSession(size)
+        
+        Set<String> headers = readAllHeaders(fromDownloader)
+        def matcher = null
+        headers.each {
+            if (it.startsWith("Range"))
+                matcher = (it =~ /^Range: (\d+)-(\d+)$/)
+        }
+        assert matcher.groupCount() > 0
+        int start = Integer.parseInt(matcher[0][1])
+        int end = Integer.parseInt(matcher[0][2])
+        
+        if (start == 0) 
+            fail("inconlcusive")
+        
+        toDownloader.write("416 don't have it \r\n".bytes)
+        toDownloader.write("X-Have: ${encodeXHave([0],2)}\r\n\r\n".bytes)
+        toDownloader.flush()
+        downloadThread.join()
+        
+        assert performed
+        performed = false
+        assert available.contains(0)
+        assert thrown == null
+        
+        // request same session
+        downloadThread = new Thread( { perform() } as Runnable)
+        downloadThread.setDaemon(true)
+        downloadThread.start()
+        
+        Thread.sleep(150)
+        
+        headers = readAllHeaders(fromDownloader)
+        matcher = null
+        headers.each {
+            if (it.startsWith("Range"))
+            matcher = (it =~ /^Range: (\d+)-(\d+)$/)
+        }
+        assert matcher.groupCount() > 0
+        start = Integer.parseInt(matcher[0][1])
+        end = Integer.parseInt(matcher[0][2])
+        assert start == 0
+    }
+    
+    @Test
+    public void testXAlt() throws Exception {
+        Personas personas = new Personas()
+        def sources = []
+        def listener = new Object() {
+            public void onSourceDiscoveredEvent(SourceDiscoveredEvent e) {
+                sources << e.source
+            }
+        }
+        eventBus.register(SourceDiscoveredEvent.class, listener)
+        
+        initSession(20)
+        readAllHeaders(fromDownloader)
+        toDownloader.write("416 don't have it\r\n".bytes)
+        toDownloader.write("X-Alt: ${personas.persona1.toBase64()},${personas.persona2.toBase64()}\r\n\r\n".bytes)
+        toDownloader.flush()
+        
+        Thread.sleep(150)
+        assert sources.contains(personas.persona1)
+        assert sources.contains(personas.persona2)
+        assert 2 == sources.size()
+    }
+    
+    private static Set<String> readAllHeaders(InputStream is) {
+        Set<String> rv = new HashSet<>()
+        String header
+        while((header = readTillRN(is)) != "")
+            rv.add(header)
+        rv
+    }
 }

core/src/test/groovy/com/muwire/core/download/PiecesTest.groovy

@@ -16,7 +16,7 @@ class PiecesTest {
     public void testSinglePiece() {
         pieces = new Pieces(1)
         assert !pieces.isComplete()
-        assert pieces.getRandomPiece() == 0
+        assert pieces.claim() == 0
         pieces.markDownloaded(0)
         assert pieces.isComplete()
     }
@@ -25,13 +25,28 @@ class PiecesTest {
     public void testTwoPieces() {
         pieces = new Pieces(2)
         assert !pieces.isComplete()
-        int piece = pieces.getRandomPiece()
+        int piece = pieces.claim()
         assert piece == 0 || piece == 1
         pieces.markDownloaded(piece)
         assert !pieces.isComplete()
-        int piece2 = pieces.getRandomPiece()
+        int piece2 = pieces.claim()
         assert piece != piece2
         pieces.markDownloaded(piece2)
         assert pieces.isComplete()
     }
+    
+    @Test
+    public void testClaimAvailable() {
+        pieces = new Pieces(2)
+        int claimed = pieces.claim([0].toSet())
+        assert claimed == 0
+        assert -1 == pieces.claim([0].toSet())
+    }
+    
+    @Test
+    public void testClaimNoneAvailable() {
+        pieces = new Pieces(20)
+        int claimed = pieces.claim()
+        assert -1 == pieces.claim([claimed].toSet())
+    }
 }

core/src/test/groovy/com/muwire/core/files/FileHasherTest.groovy

@@ -24,9 +24,9 @@ class FileHasherTest extends GroovyTestCase {
 	
 	@Test
 	void testPieceSize() {
-		assert 18 == FileHasher.getPieceSize(1000000)
-		assert 20 == FileHasher.getPieceSize(100000000)
-		assert 30 == FileHasher.getPieceSize(FileHasher.MAX_SIZE)
+		assert 17 == FileHasher.getPieceSize(1000000)
+		assert 17 == FileHasher.getPieceSize(100000000)
+		assert 24 == FileHasher.getPieceSize(FileHasher.MAX_SIZE)
 		shouldFail IllegalArgumentException, {
 			FileHasher.getPieceSize(Long.MAX_VALUE)
 		}
@@ -48,7 +48,7 @@ class FileHasherTest extends GroovyTestCase {
 		fos.write b
 		fos.close()
 		def ih = hasher.hashFile tmp
-		assert ih.getHashList().length == 32
+		assert ih.getHashList().length == 64
 	}
 	
 	@Test
@@ -58,7 +58,7 @@ class FileHasherTest extends GroovyTestCase {
 		fos.write b
 		fos.close()
 		def ih = hasher.hashFile tmp
-		assert ih.getHashList().length == 64
+		assert ih.getHashList().length == 96
 	}
 	
 	@Test
@@ -68,7 +68,7 @@ class FileHasherTest extends GroovyTestCase {
 		fos.write b
 		fos.close()
 		def ih = hasher.hashFile tmp
-		assert ih.getHashList().length == 64
+		assert ih.getHashList().length == 128
 	}
 	
 	@Test
@@ -78,6 +78,6 @@ class FileHasherTest extends GroovyTestCase {
 		fos.write b
 		fos.close()
 		def ih = hasher.hashFile tmp
-		assert ih.getHashList().length == 32 * 3
+		assert ih.getHashList().length == 160
 	}
 }

core/src/test/groovy/com/muwire/core/files/FileManagerTest.groovy

@@ -5,6 +5,7 @@ import org.junit.Test
 
 import com.muwire.core.EventBus
 import com.muwire.core.InfoHash
+import com.muwire.core.MuWireSettings
 import com.muwire.core.SharedFile
 import com.muwire.core.search.ResultsEvent
 import com.muwire.core.search.SearchEvent
@@ -26,7 +27,7 @@ class FileManagerTest {
 	void before() {
 		eventBus = new EventBus()
 		eventBus.register(ResultsEvent.class, listener)
-		manager = new FileManager(eventBus)
+		manager = new FileManager(eventBus, new MuWireSettings())
 		results = null
 	}
 	
@@ -34,7 +35,7 @@ class FileManagerTest {
 	void testHash1Result() {
 		File f = new File("a b.c")
 		InfoHash ih = InfoHash.fromHashList(new byte[32])
-		SharedFile sf = new SharedFile(f,ih)
+		SharedFile sf = new SharedFile(f,ih, 0)
 		FileHashedEvent fhe = new FileHashedEvent(sharedFile: sf)
 		manager.onFileHashedEvent(fhe)
 		
@@ -53,8 +54,8 @@ class FileManagerTest {
 	@Test
 	void testHash2Results() {
 		InfoHash ih = InfoHash.fromHashList(new byte[32])
-		SharedFile sf1 = new SharedFile(new File("a b.c"), ih)
-		SharedFile sf2 = new SharedFile(new File("d e.f"), ih)
+		SharedFile sf1 = new SharedFile(new File("a b.c"), ih, 0)
+		SharedFile sf2 = new SharedFile(new File("d e.f"), ih, 0)
 		manager.onFileLoadedEvent new FileLoadedEvent(loadedFile : sf1)
 		manager.onFileLoadedEvent new FileLoadedEvent(loadedFile : sf2)
 
@@ -75,7 +76,7 @@ class FileManagerTest {
 	void testHash0Results() {
 		File f = new File("a b.c")
 		InfoHash ih = InfoHash.fromHashList(new byte[32])
-		SharedFile sf = new SharedFile(f,ih)
+		SharedFile sf = new SharedFile(f,ih, 0)
 		FileHashedEvent fhe = new FileHashedEvent(sharedFile: sf)
 		manager.onFileHashedEvent(fhe)
 		
@@ -89,7 +90,7 @@ class FileManagerTest {
 	void testKeyword1Result() {
 		File f = new File("a b.c")
 		InfoHash ih = InfoHash.fromHashList(new byte[32])
-		SharedFile sf = new SharedFile(f,ih)
+		SharedFile sf = new SharedFile(f,ih,0)
 		FileHashedEvent fhe = new FileHashedEvent(sharedFile: sf)
 		manager.onFileHashedEvent(fhe)
 		
@@ -107,12 +108,12 @@ class FileManagerTest {
 	void testKeyword2Results() {
 		File f1 = new File("a b.c")
 		InfoHash ih1 = InfoHash.fromHashList(new byte[32])
-		SharedFile sf1 = new SharedFile(f1, ih1)
+		SharedFile sf1 = new SharedFile(f1, ih1, 0)
 		manager.onFileLoadedEvent new FileLoadedEvent(loadedFile: sf1)
 		
 		File f2 = new File("c d.e")
 		InfoHash ih2 = InfoHash.fromHashList(new byte[64])
-		SharedFile sf2 = new SharedFile(f2, ih2)
+		SharedFile sf2 = new SharedFile(f2, ih2, 0)
 		manager.onFileLoadedEvent new FileLoadedEvent(loadedFile: sf2)
 		
 		UUID uuid = UUID.randomUUID()
@@ -130,7 +131,7 @@ class FileManagerTest {
 	void testKeyword0Results() {
 		File f = new File("a b.c")
 		InfoHash ih = InfoHash.fromHashList(new byte[32])
-		SharedFile sf = new SharedFile(f,ih)
+		SharedFile sf = new SharedFile(f,ih,0)
 		FileHashedEvent fhe = new FileHashedEvent(sharedFile: sf)
 		manager.onFileHashedEvent(fhe)
 		
@@ -143,8 +144,8 @@ class FileManagerTest {
 	@Test
 	void testRemoveFileExistingHash() {
 		InfoHash ih = InfoHash.fromHashList(new byte[32])
-		SharedFile sf1 = new SharedFile(new File("a b.c"), ih)
-		SharedFile sf2 = new SharedFile(new File("d e.f"), ih)
+		SharedFile sf1 = new SharedFile(new File("a b.c"), ih, 0)
+		SharedFile sf2 = new SharedFile(new File("d e.f"), ih, 0)
 		manager.onFileLoadedEvent new FileLoadedEvent(loadedFile : sf1)
 		manager.onFileLoadedEvent new FileLoadedEvent(loadedFile : sf2)
 		
@@ -161,12 +162,12 @@ class FileManagerTest {
 	void testRemoveFile() {
 		File f1 = new File("a b.c")
 		InfoHash ih1 = InfoHash.fromHashList(new byte[32])
-		SharedFile sf1 = new SharedFile(f1, ih1)
+		SharedFile sf1 = new SharedFile(f1, ih1, 0)
 		manager.onFileLoadedEvent new FileLoadedEvent(loadedFile: sf1)
 		
 		File f2 = new File("c d.e")
 		InfoHash ih2 = InfoHash.fromHashList(new byte[64])
-		SharedFile sf2 = new SharedFile(f2, ih2)
+		SharedFile sf2 = new SharedFile(f2, ih2, 0)
 		manager.onFileLoadedEvent new FileLoadedEvent(loadedFile: sf2)
 		
 		manager.onFileUnsharedEvent new FileUnsharedEvent(unsharedFile: sf2)

core/src/test/groovy/com/muwire/core/files/HasherServiceTest.groovy

@@ -8,6 +8,7 @@ import org.junit.Before
 import org.junit.Test
 
 import com.muwire.core.EventBus
+import com.muwire.core.MuWireSettings
 
 class HasherServiceTest {
 
@@ -24,8 +25,9 @@ class HasherServiceTest {
 	void before() {
         eventBus = new EventBus()
 		hasher = new FileHasher()
-		service = new HasherService(hasher, eventBus)
+		service = new HasherService(hasher, eventBus, new FileManager(eventBus, new MuWireSettings()))
         eventBus.register(FileHashedEvent.class, listener)
+        eventBus.register(FileSharedEvent.class, service)
 		service.start()
 	}
 	

core/src/test/groovy/com/muwire/core/files/PersisterServiceLoadingTest.groovy

@@ -78,7 +78,7 @@ class PersisterServiceLoadingTest {
 		persisted.write json
 		
 		PersisterService ps = new PersisterService(persisted, eventBus, 100, null)
-		ps.start()
+		ps.onUILoadedEvent(null)
 		Thread.sleep(2000)
 		
 		assert listener.publishedFiles.size() == 1
@@ -99,7 +99,7 @@ class PersisterServiceLoadingTest {
 		FileHasher fh = new FileHasher()
 		InfoHash ih1 = fh.hashFile(sharedFile1)
 		
-		assert ih1.getHashList().length == 2 * 32
+		assert ih1.getHashList().length == 96
 		
 		def json = [:]
 		json.file = getSharedFileJsonName(sharedFile1)
@@ -111,7 +111,9 @@ class PersisterServiceLoadingTest {
 		String hash1 = Base64.encode(tmp)
 		System.arraycopy(ih1.getHashList(), 32, tmp, 0, 32)
 		String hash2 = Base64.encode(tmp)
-		json.hashList = [hash1, hash2]
+        System.arraycopy(ih1.getHashList(), 64, tmp, 0, 32)
+        String hash3 = Base64.encode(tmp)
+		json.hashList = [hash1, hash2, hash3]
 		
 		json = JsonOutput.toJson(json)
 		
@@ -119,7 +121,7 @@ class PersisterServiceLoadingTest {
 		persisted.write json
 		
 		PersisterService ps = new PersisterService(persisted, eventBus, 100, null)
-		ps.start()
+		ps.onUILoadedEvent(null)
 		Thread.sleep(2000)
 		
 		assert listener.publishedFiles.size() == 1
@@ -161,7 +163,7 @@ class PersisterServiceLoadingTest {
 		persisted.append "$json2\n"
 		
 		PersisterService ps = new PersisterService(persisted, eventBus, 100, null)
-		ps.start()
+		ps.onUILoadedEvent(null)
 		Thread.sleep(2000)
 		
 		assert listener.publishedFiles.size() == 2
@@ -193,7 +195,7 @@ class PersisterServiceLoadingTest {
 		persisted.write json1
 		
 		PersisterService ps = new PersisterService(persisted, eventBus, 100, null)
-		ps.start()
+		ps.onUILoadedEvent(null)
 		Thread.sleep(2000)
 		
 		assert listener.publishedFiles.size() == 1

core/src/test/groovy/com/muwire/core/files/PersisterServiceSavingTest.groovy

@@ -8,6 +8,7 @@ import com.muwire.core.Destinations
 import com.muwire.core.DownloadedFile
 import com.muwire.core.EventBus
 import com.muwire.core.InfoHash
+import com.muwire.core.MuWireSettings
 import com.muwire.core.SharedFile
 import com.muwire.core.util.DataUtil
 
@@ -31,7 +32,7 @@ class PersisterServiceSavingTest {
 		f = new File("build.gradle")
 		f = f.getCanonicalFile()
 		ih = fh.hashFile(f)
-		fileSource = new FileManager(eventBus) {
+		fileSource = new FileManager(eventBus, new MuWireSettings()) {
 					Map<File, SharedFile> getSharedFiles() {
 						Map<File, SharedFile> rv = new HashMap<>()
 						rv.put(f, sf)
@@ -54,10 +55,10 @@ class PersisterServiceSavingTest {
 	
 	@Test
 	void testSavingSharedFile() {
-		sf = new SharedFile(f, ih)
+		sf = new SharedFile(f, ih, 0)
 		
 		ps = new PersisterService(persisted, eventBus, 100, fileSource)
-		ps.start()
+		ps.onUILoadedEvent(null)
 		Thread.sleep(1500)
 	
 		JsonSlurper jsonSlurper = new JsonSlurper()	
@@ -73,10 +74,10 @@ class PersisterServiceSavingTest {
 	@Test
 	void testSavingDownloadedFile() {
 		Destinations dests = new Destinations()
-		sf = new DownloadedFile(f, ih, new HashSet([dests.dest1, dests.dest2]))
+		sf = new DownloadedFile(f, ih, 0, new HashSet([dests.dest1, dests.dest2]))
 		
 		ps = new PersisterService(persisted, eventBus, 100, fileSource)
-		ps.start()
+		ps.onUILoadedEvent(null)
 		Thread.sleep(1500)
 	
 		JsonSlurper jsonSlurper = new JsonSlurper()

core/src/test/groovy/com/muwire/core/search/SearchIndexTest.groovy

@@ -30,7 +30,18 @@ class SearchIndexTest {
 		assert found.size() == 2
 		assert found.contains("a b.c")
 		assert found.contains("c d.e")
+        
 	}
+    
+    @Test
+    public void testDrillDownDoesNotModifyIndex() {
+        initIndex(["a b.c", "c d.e"])
+        index.search(["c","e"])
+        def found = index.search(["c"])
+        assert found.size() == 2
+        assert found.contains("a b.c")
+        assert found.contains("c d.e")
+    }
 	
 	@Test
 	void testDrillDown() {
@@ -72,4 +83,11 @@ class SearchIndexTest {
 		assert found.size() == 1
 		assert found.contains("b c.d")
 	}
+    
+    @Test
+    void testDuplicateTerm() {
+        initIndex(["MuWire-0.3.3.jar"])
+        def found = index.search(["muwire", "0", "3", "jar"])
+        assert found.size() == 1
+    }
 }

core/src/test/groovy/com/muwire/core/upload/RequestParsingTest.groovy

@@ -9,18 +9,18 @@ import com.muwire.core.InfoHash
 
 class RequestParsingTest {
     
-    Request request
+    ContentRequest request
     
     private void fromString(String requestString) {
         def is = new ByteArrayInputStream(requestString.getBytes(StandardCharsets.US_ASCII))
-        request = Request.parse(new InfoHash(new byte[InfoHash.SIZE]), is)
+        request = Request.parseContentRequest(new InfoHash(new byte[InfoHash.SIZE]), is)
     }
 
     
     private static void failed(String requestString) {
         try {
             def is = new ByteArrayInputStream(requestString.getBytes(StandardCharsets.US_ASCII))
-            Request.parse(new InfoHash(new byte[InfoHash.SIZE]), is)
+            Request.parseContentRequest(new InfoHash(new byte[InfoHash.SIZE]), is)
             assert false
         } catch (IOException expected) {}
     }

core/src/test/groovy/com/muwire/core/upload/UploaderTest.groovy

@@ -19,7 +19,7 @@ class UploaderTest {
     InputStream is
     OutputStream os
     
-    Request request
+    ContentRequest request
     Uploader uploader
     
     byte[] inFile
@@ -52,7 +52,7 @@ class UploaderTest {
     }
     
     private void startUpload() {
-        uploader = new Uploader(file, request, endpoint)
+        uploader = new ContentUploader(file, request, endpoint)
         uploadThread = new Thread(uploader.respond() as Runnable)
         uploadThread.setDaemon(true)
         uploadThread.start()
@@ -77,7 +77,7 @@ class UploaderTest {
     @Test
     public void testSmallFile() {
         fillFile(20)
-        request = new Request(range : new Range(0,19))
+        request = new ContentRequest(range : new Range(0,19))
         startUpload()
         assert "200 OK" == readUntilRN()
         assert "Content-Range: 0-19" == readUntilRN()
@@ -92,7 +92,7 @@ class UploaderTest {
     @Test
     public void testRequestMiddle() {
         fillFile(20)
-        request = new Request(range : new Range(5,15))
+        request = new ContentRequest(range : new Range(5,15))
         startUpload()
         assert "200 OK" == readUntilRN()
         assert "Content-Range: 5-15" == readUntilRN()
@@ -108,7 +108,7 @@ class UploaderTest {
     @Test
     public void testOutOfRange() {
         fillFile(20)
-        request = new Request(range : new Range(0,20))
+        request = new ContentRequest(range : new Range(0,20))
         startUpload()
         assert "416 Range Not Satisfiable" == readUntilRN()
         assert "" == readUntilRN()
@@ -118,7 +118,7 @@ class UploaderTest {
     public void testLargeFile() {
         final int length = 0x1 << 14
         fillFile(length)
-        request = new Request(range : new Range(0, length - 1))
+        request = new ContentRequest(range : new Range(0, length - 1))
         startUpload()
         readUntilRN()
         readUntilRN()

doc/design.md

@@ -49,7 +49,7 @@ Files are transferred over HTTP1.1 protocol with some custom headers added for d
 
 ### Mesh management
 
-Download mesh management is identical to Gnutella, except instead of ip addresses MuWire personas are used.  [More information](http://rfc-gnutella.sourceforge.net/developer/tmp/download-mesh.html) 
+Download mesh management is a simplified version of Gnutella's "Alternate Location" system.  For more information see the "download-mesh" document.
 
 ### In-Network updates
 

doc/download-mesh.md

@@ -0,0 +1,15 @@
+# Download Mesh / Partial Sharing
+
+MuWire uses a system similar to Gnutella's "Alternate Location" download mesh management system, however it is simplified to account for I2P's strengths and borrows a bit from BitTorrent's "Have" message.
+
+### "X-Have" header
+
+With every request a downloader makes it sends an "X-Have" header containing the Base64-encoded representation of a bitfield where bits set to 1 represent pieces of the file that the downloader already has.  To make partial file sharing possible, if the uploader does not have the complete file it also sends this header in every response.  If the header is missing it is assumed the uploader has the complete file.
+
+### "X-Alt" header
+
+The uploader can recommend other uploaders to the downloader via the "X-Alt" header.  The format of this header is a comma-separated list of Base64-encoded Personas that have previously reported having at least one piece of the file to the uploader via the "X-Have" header.
+
+### Differences from Gnutella
+
+Unlike Gnutella the uploader is the sole repository where possible sources of the file are tracked.  There is no negative "X-Nalt" header to prevent attacking the download mesh by mass downvoting of sources.

doc/infohash-upgrade.md

@@ -0,0 +1,37 @@
+# InfoHash Upgrade
+
+An infohash is a list of hashes of the pieces of the file.  In MuWire 0.1.0 the piece size is determined by policy based on the file size, with the intention being to keep the list of hashes to maximum 128 in number.  The reason for this is that infohashes get returned with search results, and smaller piece size will result in larger infohash which will slow down the transmission of search results.
+
+### The problem
+
+This presents the following problem - larger files have larger piece sizes: a 2GB file will have a 16MB piece size, a 4GB file 32MB and so on.  Pieces are atomic, i.e. if a download fails halfway through a piece it will resume since the beginning of the piece.  Unfortunately in the current state of I2P the failure rate of streaming connections is too high and transmitting an entire piece over a single connection is not likely to succeed as the size of the piece increases.  This makes downloading multi-gigabyte files nearly impossible.
+
+### Out-of-band request proposal
+
+Barring any improvement to the reliability of I2P connections, the following approach can be used to enable smaller piece sizes and the corresponding increase in download success rate of large files:
+
+* Search results do carry the full infohash of the file, instead they carry just the root and the number of 32-byte hashes in the infohash
+* When a downloader begins a download, it issues a request for the full infohash first.  Only after that is fetched and verified, the download proceeds as usual.
+
+Such approach is more complicated in nature than the current simplistic one, but it has the additional benefit of reducing the size of search results.
+
+### Wire protocol changes
+
+A new request method - "HASHLIST" is introduced.  It is immediately followed by the Base64 encoded root of the infohash and '\r\n'.  The request may contain HTTP headers in the same format as in HTTP 1.1.  One such header may be the X-Persona header, but that is optional.  After all the headers a blank line with just '\r\n' is sent.
+
+The response is identical to that of regular GET request, with the same response codes.  The response may also carry headers, and is also followed by a blank line with '\r\n'.  What follows immediately after that is a binary representation of the hashlist.  After sending the full hashlist, the uploader keeps the connection open in anticipation of the first content GET request.
+
+The downloader verifies the hashlist by hashing it with SHA256 and comparing it to the advertised infohash root.  If there is a match, it proceeds with the rest of the download as in MuWire 0.1.0.
+
+### Necessary changes to MuWire 0.1.0
+
+To accommodate this proposal in a backwards compatible manner, it is necessary to first de-hardcode the piece count computation logic which is currently hardcoded in a few places.  Then it is necessary to:
+
+* persist the piece size to disk when a file is being shared so that it can be returned in search results
+* search queries need to carry a flag of some kind that indicates support for out-of-band infohash support
+  * that in turn requires nodes to support passing of that flag as the queries are being routed through the network
+* the returned results need to indicate whether they are returning a full infohash or just a root; the "version" field in the json can be used for that
+
+### Roadmap
+
+Support for this proposal is currently intended for MuWire 0.2.0.  However, in order to make rollout smooth, in MuWire 0.1.1 support for the first two items will be introduced.  Since there already are users on the network who have shared files without persisting the size of their pieces on disk, those files will not be eligible to participate in this scheme unless re-shared (which implies re-hashing).

doc/wire-protocol.md

@@ -131,12 +131,18 @@ Sent by a leaf or ultrapeer when performing a search.  Contains the reply-to per
     firstHop: false,
     keywords : ["keyword1","keyword2"...]
     infohash: "asdfasdf...",
-    replyTo : "asdfasf...b64"
+    replyTo : "asdfasf...b64",
+    originator : "asfasdf...",
+    "oobHashlist" : true
 }
 ```
 
 A search can contain either the query entered by the user in the UI or the infohash if the user is looking for a specific file.  If both are present, the infohash takes precedence and the keyword query is ignored.
 
+The "originator" field contains the Base64-encoded persona of the originator of the query.  It is used for display purposes only.  The I2P destination in that persona must match the one in the "replyTo" field.
+
+The oobHashlist flag indicates support for out-of-band hashlist delivery, which is not yet implemented.  Nevertheless, this flag gets propagated through the network for future-proofing.
+
 ### Ultrapeer to leaf
 
 The "Search" message is also sent from an ultrapeer to a leaf.
@@ -175,6 +181,8 @@ Search results are sent through and HTTP POST method from the responder to the o
 * The "altlocs" list contains list of alternate personas that the responder thinks may also have the file.
 * The "pieceSize" field is the size of the each individual file piece (except possibly the last) in powers of 2
 
+Results version 1 contain the full hashlist, version 2 does not contain that list.  See the "infohash-upgrade" document for more information.
+
 ### "Who do you trust" query - any node to any node
 (See the "web-of-trust" document for more info on this query)
 

gradle.properties

@@ -1,5 +1,8 @@
 group         = com.muwire
-version       = 0.0.7
+version       = 0.4.3
 groovyVersion = 2.4.15
 slf4jVersion  = 1.7.25
 spockVersion  = 1.1-groovy-2.4
+
+sourceCompatibility=1.8
+targetCompatibility=1.8

gui/build.gradle

@@ -41,6 +41,7 @@ griffon {
 }
 
 mainClassName = 'com.muwire.gui.Launcher'
+applicationDefaultJvmArgs = ['-Djava.util.logging.config.file=logging.properties']
 
 apply from: 'gradle/publishing.gradle'
 apply from: 'gradle/code-coverage.gradle'

gui/griffon-app/conf/Config.groovy

@@ -26,4 +26,14 @@ mvcGroups {
         view = 'com.muwire.gui.OptionsView'
         controller = 'com.muwire.gui.OptionsController'
     }
+    "mu-wire-status" {
+        model = 'com.muwire.gui.MuWireStatusModel'
+        view = 'com.muwire.gui.MuWireStatusView'
+        controller = 'com.muwire.gui.MuWireStatusController'
+    }
+    'i-2-p-status' {
+        model = 'com.muwire.gui.I2PStatusModel'
+        view = 'com.muwire.gui.I2PStatusView'
+        controller = 'com.muwire.gui.I2PStatusController'
+    }
 }

gui/griffon-app/controllers/com/muwire/gui/I2PStatusController.groovy

@@ -0,0 +1,40 @@
+package com.muwire.gui
+
+import griffon.core.artifact.GriffonController
+import griffon.core.controller.ControllerAction
+import griffon.inject.MVCMember
+import griffon.metadata.ArtifactProviderFor
+import net.i2p.router.Router
+
+import javax.annotation.Nonnull
+
+import com.muwire.core.Core
+
+@ArtifactProviderFor(GriffonController)
+class I2PStatusController {
+    @MVCMember @Nonnull
+    I2PStatusModel model
+    @MVCMember @Nonnull
+    I2PStatusView view
+
+    @ControllerAction
+    void refresh() {
+        Core core = application.context.get("core")
+        Router router = core.router
+        model.networkStatus = router._context.commSystem().status.toStatusString()
+        model.ntcpConnections = router._context.commSystem().getTransports()["NTCP"].countPeers()
+        model.ssuConnections = router._context.commSystem().getTransports()["SSU"].countPeers()
+        model.participatingTunnels = router._context.tunnelManager().getParticipatingCount()
+        model.activePeers = router._context.profileOrganizer().countActivePeers()
+        model.receiveBps = router._context.bandwidthLimiter().getReceiveBps15s()
+        model.sendBps = router._context.bandwidthLimiter().getSendBps15s()
+        model.participatingBW = router._context.bandwidthLimiter().getCurrentParticipatingBandwidth()
+        
+    }
+    
+    @ControllerAction
+    void close() {
+        view.dialog.setVisible(false)
+        mvcGroup.destroy()
+    }
+}

gui/griffon-app/controllers/com/muwire/gui/MainFrameController.groovy

@@ -7,13 +7,19 @@ import griffon.core.mvc.MVCGroup
 import griffon.core.mvc.MVCGroupConfiguration
 import griffon.inject.MVCMember
 import griffon.metadata.ArtifactProviderFor
+import net.i2p.data.Base64
+
 import javax.annotation.Nonnull
 import javax.inject.Inject
 
 import com.muwire.core.Constants
 import com.muwire.core.Core
 import com.muwire.core.download.DownloadStartedEvent
+import com.muwire.core.download.UIDownloadCancelledEvent
 import com.muwire.core.download.UIDownloadEvent
+import com.muwire.core.download.UIDownloadPausedEvent
+import com.muwire.core.download.UIDownloadResumedEvent
+import com.muwire.core.files.DirectoryUnsharedEvent
 import com.muwire.core.search.QueryEvent
 import com.muwire.core.search.SearchEvent
 import com.muwire.core.trust.TrustEvent
@@ -36,21 +42,62 @@ class MainFrameController {
         cardsPanel.getLayout().show(cardsPanel, "search window")
         
         def search = builder.getVariable("search-field").text
+        search = search.trim()
+        if (search.length() == 0)
+            return
+        if (search.length() > 128)
+            search = search.substring(0,128)
         def uuid = UUID.randomUUID()
         Map<String, Object> params = new HashMap<>()
         params["search-terms"] = search
         params["uuid"] = uuid.toString()
         def group = mvcGroup.createMVCGroup("SearchTab", uuid.toString(), params)
         model.results[uuid.toString()] = group
+
+        boolean hashSearch = false
+        byte [] root = null
+        if (search.length() == 44 && search.indexOf(" ") < 0) {
+            try {
+                root = Base64.decode(search)
+                hashSearch = true
+            } catch (Exception e) {
+                // not a hash search
+            }
+        }
         
-        // this can be improved a lot
-        def terms = search.toLowerCase().trim().split(Constants.SPLIT_PATTERN)
-        def searchEvent = new SearchEvent(searchTerms : terms, uuid : uuid)
+        def searchEvent
+        if (hashSearch) {
+            searchEvent = new SearchEvent(searchHash : root, uuid : uuid, oobInfohash: true)
+        } else {
+            // this can be improved a lot
+            def replaced = search.toLowerCase().trim().replaceAll(Constants.SPLIT_PATTERN, " ")
+            def terms = replaced.split(" ")
+            def nonEmpty = []
+            terms.each { if (it.length() > 0) nonEmpty << it }
+            searchEvent = new SearchEvent(searchTerms : nonEmpty, uuid : uuid, oobInfohash: true)
+        }
         core.eventBus.publish(new QueryEvent(searchEvent : searchEvent, firstHop : true, 
             replyTo: core.me.destination, receivedOn: core.me.destination,
             originator : core.me))
     }
     
+    void search(String infoHash, String tabTitle) {
+        def cardsPanel = builder.getVariable("cards-panel")
+        cardsPanel.getLayout().show(cardsPanel, "search window")
+        def uuid = UUID.randomUUID()
+        Map<String, Object> params = new HashMap<>()
+        params["search-terms"] = tabTitle
+        params["uuid"] = uuid.toString()
+        def group = mvcGroup.createMVCGroup("SearchTab", uuid.toString(), params)
+        model.results[uuid.toString()] = group
+        
+        def searchEvent = new SearchEvent(searchHash : Base64.decode(infoHash), uuid:uuid,
+            oobInfohash: true)
+        core.eventBus.publish(new QueryEvent(searchEvent : searchEvent, firstHop : true,
+            replyTo: core.me.destination, receivedOn: core.me.destination,
+            originator : core.me))
+    }
+    
     private def selectedResult() {
         def selected = builder.getVariable("result-tabs").getSelectedComponent()
         def group = selected.getClientProperty("mvc-group")
@@ -58,28 +105,40 @@ class MainFrameController {
         int row = table.getSelectedRow()
         if (row == -1)
             return
+        def sortEvt = group.view.lastSortEvent
+        if (sortEvt != null) {
+            row = group.view.resultsTable.rowSorter.convertRowIndexToModel(row)
+        } 
         group.model.results[row]        
     }
     
-    private def selectedDownload() {
-        def selected = builder.getVariable("downloads-table").getSelectedRow()
-        model.downloads[selected].downloader
+    private int selectedDownload() {
+        def downloadsTable = builder.getVariable("downloads-table")
+        def selected = downloadsTable.getSelectedRow()
+        def sortEvt = mvcGroup.view.lastDownloadSortEvent
+        if (sortEvt != null)
+            selected = downloadsTable.rowSorter.convertRowIndexToModel(selected)
+        selected
     }
     
     @ControllerAction
     void download() {
         def result = selectedResult()
         if (result == null)
-            return // TODO disable button
-            
+            return
+        
+        if (!model.canDownload(result.infohash))
+            return   
+             
         def file = new File(application.context.get("muwire-settings").downloadLocation, result.name)
         
         def selected = builder.getVariable("result-tabs").getSelectedComponent()
         def group = selected.getClientProperty("mvc-group")
         
         def resultsBucket = group.model.hashBucket[result.infohash]
+        def sources = group.model.sourcesBucket[result.infohash]
          
-        core.eventBus.publish(new UIDownloadEvent(result : resultsBucket, target : file))
+        core.eventBus.publish(new UIDownloadEvent(result : resultsBucket, sources: sources, target : file))
     }
     
     @ControllerAction
@@ -100,14 +159,24 @@ class MainFrameController {
     
     @ControllerAction 
     void cancel() {
-        def downloader = selectedDownload()
+        def downloader = model.downloads[selectedDownload()].downloader
         downloader.cancel()
+        model.downloadInfoHashes.remove(downloader.getInfoHash())
+        core.eventBus.publish(new UIDownloadCancelledEvent(downloader : downloader))
     }
     
     @ControllerAction
     void resume() {
-        def downloader = selectedDownload()
+        def downloader = model.downloads[selectedDownload()].downloader
         downloader.resume()
+        core.eventBus.publish(new UIDownloadResumedEvent())
+    }
+    
+    @ControllerAction
+    void pause() {
+        def downloader = model.downloads[selectedDownload()].downloader
+        downloader.pause()
+        core.eventBus.publish(new UIDownloadPausedEvent())
     }
 
     private void markTrust(String tableName, TrustLevel level, def list) {
@@ -137,6 +206,29 @@ class MainFrameController {
         markTrust("trusted-table", TrustLevel.NEUTRAL, model.trusted)
     }
     
+    void unshareSelectedFiles() {
+        println "unsharing selected files"
+    }
+    
+    void stopWatchingDirectory() {
+        String directory = mvcGroup.view.getSelectedWatchedDirectory()
+        if (directory == null)
+            return
+        core.muOptions.watchedDirectories.remove(directory)
+        saveMuWireSettings()    
+        core.eventBus.publish(new DirectoryUnsharedEvent(directory : new File(directory)))
+                
+        model.watched.remove(directory)
+        builder.getVariable("watched-directories-table").model.fireTableDataChanged()
+    }
+    
+    void saveMuWireSettings() {
+        File f = new File(core.home, "MuWire.properties")
+        f.withOutputStream { 
+            core.muOptions.write(it)
+        }
+    }
+    
     void mvcGroupInit(Map<String, String> args) {
         application.addPropertyChangeListener("core", {e-> 
             core = e.getNewValue()

gui/griffon-app/controllers/com/muwire/gui/MuWireStatusController.groovy

@@ -0,0 +1,45 @@
+package com.muwire.gui
+
+import griffon.core.artifact.GriffonController
+import griffon.core.controller.ControllerAction
+import griffon.inject.MVCMember
+import griffon.metadata.ArtifactProviderFor
+import javax.annotation.Nonnull
+
+import com.muwire.core.Core
+
+@ArtifactProviderFor(GriffonController)
+class MuWireStatusController {
+    @MVCMember @Nonnull
+    MuWireStatusModel model
+    @MVCMember @Nonnull
+    MuWireStatusView view
+
+    @ControllerAction
+    void refresh() {
+        Core core = application.context.get("core")
+        
+        int incoming = 0
+        int outgoing = 0
+        core.connectionManager.getConnections().each {
+            if (it.incoming)
+                incoming++
+            else
+                outgoing++
+        }
+        model.incomingConnections = incoming
+        model.outgoingConnections = outgoing
+        
+        model.knownHosts = core.hostCache.hosts.size()
+        
+        model.sharedFiles = core.fileManager.fileToSharedFile.size()
+        
+        model.downloads = core.downloadManager.downloaders.size()
+    }
+    
+    @ControllerAction
+    void close() {
+        view.dialog.setVisible(false)
+        mvcGroup.destroy()
+    }
+}

gui/griffon-app/controllers/com/muwire/gui/OptionsController.groovy

@@ -4,7 +4,15 @@ import griffon.core.artifact.GriffonController
 import griffon.core.controller.ControllerAction
 import griffon.inject.MVCMember
 import griffon.metadata.ArtifactProviderFor
+import groovy.util.logging.Log
+
+import java.util.logging.Level
+
 import javax.annotation.Nonnull
+import javax.swing.JFileChooser
+
+import com.muwire.core.Core
+import com.muwire.core.MuWireSettings
 
 @ArtifactProviderFor(GriffonController)
 class OptionsController {
@@ -15,21 +23,118 @@ class OptionsController {
 
     @ControllerAction
     void save() {
-        String text = view.retryField.text
-        model.downloadRetryInterval = text
+        String text
+        Core core = application.context.get("core")
+        MuWireSettings settings = application.context.get("muwire-settings")
         
-        def settings = application.context.get("muwire-settings")
+        def i2pProps = core.i2pOptions
+        
+        text = view.inboundLengthField.text
+        model.inboundLength = text
+        i2pProps["inbound.length"] = text
+        
+        text = view.inboundQuantityField.text
+        model.inboundQuantity = text
+        i2pProps["inbound.quantity"] = text
+        
+        text = view.outboundQuantityField.text
+        model.outboundQuantity = text
+        i2pProps["outbound.quantity"] = text
+        
+        text = view.outboundLengthField.text
+        model.outboundLength = text
+        i2pProps["outbound.length"] = text
+        
+        if (settings.embeddedRouter) {
+            text = view.i2pNTCPPortField.text
+            model.i2pNTCPPort = text
+            i2pProps["i2np.ntcp.port"] = text
+            
+            text = view.i2pUDPPortField.text
+            model.i2pUDPPort = text
+            i2pProps["i2np.udp.port"] = text
+        }
+        
+        
+        File i2pSettingsFile = new File(core.home, "i2p.properties")
+        i2pSettingsFile.withOutputStream { 
+            i2pProps.store(it,"")
+        }
+                
+        text = view.retryField.text
+        model.downloadRetryInterval = text
+
         settings.downloadRetryInterval = Integer.valueOf(text)
 
         text = view.updateField.text
         model.updateCheckInterval = text
         settings.updateCheckInterval = Integer.valueOf(text)
-                
-        File settingsFile = new File(application.context.get("core").home, "MuWire.properties")
+
+        boolean autoDownloadUpdate = view.autoDownloadUpdateCheckbox.model.isSelected()
+        model.autoDownloadUpdate = autoDownloadUpdate
+        settings.autoDownloadUpdate = autoDownloadUpdate
+        
+        boolean onlyTrusted = view.allowUntrustedCheckbox.model.isSelected()
+        model.onlyTrusted = onlyTrusted
+        settings.setAllowUntrusted(!onlyTrusted)
+        
+        boolean shareDownloaded = view.shareDownloadedCheckbox.model.isSelected()
+        model.shareDownloadedFiles = shareDownloaded
+        settings.shareDownloadedFiles = shareDownloaded
+        
+        String downloadLocation = model.downloadLocation
+        settings.downloadLocation = new File(downloadLocation)
+
+        if (settings.embeddedRouter) {
+            text = view.inBwField.text
+            model.inBw = text
+            settings.inBw = Integer.valueOf(text)
+            text = view.outBwField.text
+            model.outBw = text
+            settings.outBw = Integer.valueOf(text)
+        }
+                                
+        File settingsFile = new File(core.home, "MuWire.properties")
         settingsFile.withOutputStream { 
             settings.write(it)
         }
         
+        // UI Setttings
+        
+        UISettings uiSettings = application.context.get("ui-settings")
+        text = view.lnfField.text
+        model.lnf = text
+        uiSettings.lnf = text
+        
+        text = view.fontField.text
+        model.font = text
+        uiSettings.font = text
+        
+//        boolean showMonitor = view.monitorCheckbox.model.isSelected()
+//        model.showMonitor = showMonitor
+//        uiSettings.showMonitor = showMonitor
+        
+        boolean clearCancelledDownloads = view.clearCancelledDownloadsCheckbox.model.isSelected()
+        model.clearCancelledDownloads = clearCancelledDownloads
+        uiSettings.clearCancelledDownloads = clearCancelledDownloads
+        
+        boolean clearFinishedDownloads = view.clearFinishedDownloadsCheckbox.model.isSelected()
+        model.clearFinishedDownloads = clearFinishedDownloads
+        uiSettings.clearFinishedDownloads = clearFinishedDownloads
+        
+        boolean excludeLocalResult = view.excludeLocalResultCheckbox.model.isSelected()
+        model.excludeLocalResult = excludeLocalResult
+        uiSettings.excludeLocalResult = excludeLocalResult
+        
+//        boolean showSearchHashes = view.showSearchHashesCheckbox.model.isSelected()
+//        model.showSearchHashes = showSearchHashes
+//        uiSettings.showSearchHashes = showSearchHashes
+        
+        File uiSettingsFile = new File(core.home, "gui.properties")
+        uiSettingsFile.withOutputStream { 
+            uiSettings.write(it)
+        }
+        
         cancel()
     }
     
@@ -38,4 +143,15 @@ class OptionsController {
         view.d.setVisible(false)
         mvcGroup.destroy()
     }
+    
+    @ControllerAction
+    void downloadLocation() {
+        def chooser = new JFileChooser()
+        chooser.setFileHidingEnabled(false)
+        chooser.setDialogTitle("Select location for downloaded files")
+        chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY)
+        int rv = chooser.showOpenDialog(null)
+        if (rv == JFileChooser.APPROVE_OPTION)
+            model.downloadLocation = chooser.getSelectedFile().getAbsolutePath()
+    }
 }

gui/griffon-app/lifecycle/Initialize.groovy

@@ -1,17 +1,25 @@
 import griffon.core.GriffonApplication
 import groovy.util.logging.Log
+import net.i2p.util.SystemVersion
 
 import org.codehaus.griffon.runtime.core.AbstractLifecycleHandler
 
 import com.muwire.core.Core
 import com.muwire.core.MuWireSettings
+import com.muwire.gui.UISettings
 
 import javax.annotation.Nonnull
 import javax.inject.Inject
+import javax.swing.JTable
+import javax.swing.LookAndFeel
+import javax.swing.UIManager
 
 import static griffon.util.GriffonApplicationUtils.isMacOSX
 import static groovy.swing.SwingBuilder.lookAndFeel
 
+import java.awt.Font
+import java.util.logging.Level
+
 @Log
 class Initialize extends AbstractLifecycleHandler {
     @Inject
@@ -21,11 +29,89 @@ class Initialize extends AbstractLifecycleHandler {
 
     @Override
     void execute() {
-        if (isMacOSX()) {
-            lookAndFeel('nimbus') // otherwise the file chooser doesn't open???
-        } else {
-            lookAndFeel('system', 'gtk')
+        log.info "Loading home dir"
+        def portableHome = System.getProperty("portable.home")
+        def home = portableHome == null ?
+            selectHome() :
+            portableHome
+            
+        home = new File(home)
+        if (!home.exists()) {
+            log.info("creating home dir $home")
+            home.mkdirs()
         }
+        
+        application.context.put("muwire-home", home.getAbsolutePath())
+        
+        System.getProperties().setProperty("awt.useSystemAAFontSettings", "true")
+        
+        def guiPropsFile = new File(home, "gui.properties")
+        UISettings uiSettings
+        if (guiPropsFile.exists()) {
+            Properties props = new Properties()
+            guiPropsFile.withInputStream { props.load(it) }
+            uiSettings = new UISettings(props)
+            
+            log.info("settting user-specified lnf $uiSettings.lnf")
+            try {
+                lookAndFeel(uiSettings.lnf)
+            } catch (Throwable bad) {
+                log.log(Level.WARNING,"couldn't set desired look and feeel, switching to defaults", bad)
+                uiSettings.lnf = lookAndFeel("system","gtk","metal").getID()
+            }
+            
+            if (uiSettings.font != null) {
+                log.info("setting user-specified font $uiSettings.font")
+                Font font = new Font(uiSettings.font, Font.PLAIN, 12)
+                def defaults = UIManager.getDefaults()
+                defaults.put("Button.font", font)
+                defaults.put("RadioButton.font", font)
+                defaults.put("Label.font", font)
+                defaults.put("CheckBox.font", font)
+                defaults.put("Table.font", font)
+                defaults.put("TableHeader.font", font)
+                // TODO: add others
+            }
+        } else {
+            Properties props = new Properties()
+            uiSettings = new UISettings(props)
+            log.info "will try default lnfs"
+            if (isMacOSX()) {
+                if (SystemVersion.isJava9()) {
+                    uiSettings.lnf = "metal"
+                    lookAndFeel("metal")
+                } else {
+                    uiSettings.lnf = "nimbus"
+                    lookAndFeel('nimbus') // otherwise the file chooser doesn't open???
+                }
+            } else {
+                LookAndFeel chosen = lookAndFeel('system', 'gtk')
+                uiSettings.lnf = chosen.getID()
+                log.info("ended up applying $chosen.name")
+            }
+        }
+        
+        application.context.put("ui-settings", uiSettings)
+    }
+    
+    private static String selectHome() {
+        def home = new File(System.properties["user.home"])
+        def defaultHome = new File(home, ".MuWire")
+        if (defaultHome.exists())
+            return defaultHome.getAbsolutePath()
+        if (SystemVersion.isMac()) {
+            def library = new File(home, "Library")
+            def appSupport = new File(library, "Application Support")
+            def muwire = new File(appSupport,"MuWire")
+            return muwire.getAbsolutePath()
+        }
+        if (SystemVersion.isWindows()) {
+            def appData = new File(home,"AppData")
+            def roaming = new File(appData, "Roaming")
+            def muwire = new File(roaming, "MuWire")
+            return muwire.getAbsolutePath()
+        }
+        defaultHome.getAbsolutePath()
     }
 }
 

gui/griffon-app/lifecycle/Ready.groovy

@@ -1,11 +1,14 @@
+
 import griffon.core.GriffonApplication
 import griffon.core.env.Metadata
 import groovy.util.logging.Log
+import net.i2p.util.SystemVersion
 
 import org.codehaus.griffon.runtime.core.AbstractLifecycleHandler
 
 import com.muwire.core.Core
 import com.muwire.core.MuWireSettings
+import com.muwire.core.UILoadedEvent
 import com.muwire.core.files.FileSharedEvent
 
 import javax.annotation.Nonnull
@@ -32,17 +35,8 @@ class Ready extends AbstractLifecycleHandler {
     @Override
     void execute() {
         log.info "starting core services"
-        def portableHome = System.getProperty("portable.home")
-        def home = portableHome == null ? 
-            System.getProperty("user.home") + File.separator + ".MuWire" :
-            portableHome
-            
-        home = new File(home)
-        if (!home.exists()) {
-            log.info("creating home dir")
-            home.mkdir()
-        }
         
+        def home = new File(application.getContext().getAsString("muwire-home"))
         def props = new Properties()
         def propsFile = new File(home, "MuWire.properties")
         if (propsFile.exists()) {
@@ -54,6 +48,8 @@ class Ready extends AbstractLifecycleHandler {
         } else {
             log.info("creating new properties")
             props = new MuWireSettings()
+            props.embeddedRouter = Boolean.parseBoolean(System.getProperties().getProperty("embeddedRouter"))
+            props.updateType = System.getProperty("updateType")
             def nickname
             while (true) {
                 nickname = JOptionPane.showInputDialog(null,
@@ -80,6 +76,7 @@ class Ready extends AbstractLifecycleHandler {
                 props.downloadLocation = new File(portableDownloads)
             } else {
                 def chooser = new JFileChooser()
+                chooser.setFileHidingEnabled(false)
                 chooser.setDialogTitle("Select a directory where downloads will be saved")
                 chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY)
                 int rv = chooser.showOpenDialog(null)
@@ -104,6 +101,9 @@ class Ready extends AbstractLifecycleHandler {
                 "Can't connect to I2P router", JOptionPane.WARNING_MESSAGE)
             System.exit(0)
         }
+        Runtime.getRuntime().addShutdownHook({
+            core.shutdown() 
+        })
         core.startServices()
         application.context.put("muwire-settings", props)
         application.context.put("core",core)
@@ -111,11 +111,7 @@ class Ready extends AbstractLifecycleHandler {
             it.propertyChange(new PropertyChangeEvent(this, "core", null, core)) 
         }
         
-        if (props.sharedFiles != null) {
-            props.sharedFiles.split(",").each {
-                core.eventBus.publish(new FileSharedEvent(file : new File(it)))
-            }
-        }
+        core.eventBus.publish(new UILoadedEvent())
     }
 }
 

gui/griffon-app/models/com/muwire/gui/I2PStatusModel.groovy

@@ -0,0 +1,27 @@
+package com.muwire.gui
+
+import javax.annotation.Nonnull
+
+import griffon.core.artifact.GriffonModel
+import griffon.inject.MVCMember
+import griffon.transform.Observable
+import griffon.metadata.ArtifactProviderFor
+
+@ArtifactProviderFor(GriffonModel)
+class I2PStatusModel {
+    @MVCMember @Nonnull
+    I2PStatusController controller
+    
+    @Observable int ntcpConnections
+    @Observable int ssuConnections
+    @Observable String networkStatus
+    @Observable int participatingTunnels
+    @Observable int activePeers
+    @Observable int receiveBps
+    @Observable int sendBps
+    @Observable int participatingBW
+    
+    void mvcGroupInit(Map<String,String> args) {
+        controller.refresh()
+    }
+}

gui/griffon-app/models/com/muwire/gui/MainFrameModel.groovy

@@ -9,43 +9,57 @@ import javax.swing.JTable
 
 import com.muwire.core.Core
 import com.muwire.core.InfoHash
+import com.muwire.core.MuWireSettings
 import com.muwire.core.Persona
+import com.muwire.core.RouterDisconnectedEvent
 import com.muwire.core.connection.ConnectionAttemptStatus
 import com.muwire.core.connection.ConnectionEvent
 import com.muwire.core.connection.DisconnectionEvent
 import com.muwire.core.download.DownloadStartedEvent
 import com.muwire.core.download.Downloader
+import com.muwire.core.files.AllFilesLoadedEvent
+import com.muwire.core.files.FileDownloadedEvent
 import com.muwire.core.files.FileHashedEvent
 import com.muwire.core.files.FileLoadedEvent
 import com.muwire.core.files.FileSharedEvent
+import com.muwire.core.files.FileUnsharedEvent
 import com.muwire.core.search.QueryEvent
+import com.muwire.core.search.UIResultBatchEvent
 import com.muwire.core.search.UIResultEvent
 import com.muwire.core.trust.TrustEvent
 import com.muwire.core.trust.TrustService
 import com.muwire.core.update.UpdateAvailableEvent
+import com.muwire.core.update.UpdateDownloadedEvent
 import com.muwire.core.upload.UploadEvent
 import com.muwire.core.upload.UploadFinishedEvent
 
 import griffon.core.GriffonApplication
 import griffon.core.artifact.GriffonModel
+import griffon.core.env.Metadata
 import griffon.core.mvc.MVCGroup
 import griffon.inject.MVCMember
 import griffon.transform.FXObservable
 import griffon.transform.Observable
+import net.i2p.data.Base64
 import net.i2p.data.Destination
 import griffon.metadata.ArtifactProviderFor
 
 @ArtifactProviderFor(GriffonModel)
 class MainFrameModel {
+    @Inject Metadata metadata
     @MVCMember @Nonnull
     FactoryBuilderSupport builder
+    @MVCMember @Nonnull
+    MainFrameController controller
     @Inject @Nonnull GriffonApplication application
     @Observable boolean coreInitialized = false
+    @Observable boolean routerPresent
     
     def results = new ConcurrentHashMap<>()
     def downloads = []
     def uploads = []
     def shared = []
+    def watched = []
     def connectionList = []
     def searches = new LinkedList()
     def trusted = []
@@ -53,15 +67,22 @@ class MainFrameModel {
     
     @Observable int connections
     @Observable String me
-    @Observable boolean searchButtonsEnabled
+    @Observable boolean downloadActionEnabled
+    @Observable boolean trustButtonsEnabled
     @Observable boolean cancelButtonEnabled
     @Observable boolean retryButtonEnabled
+    @Observable boolean pauseButtonEnabled
+    @Observable String resumeButtonText
     
     private final Set<InfoHash> infoHashes = new HashSet<>()
+    
+    private final Set<InfoHash> downloadInfoHashes = new HashSet<>()
 
-    volatile Core core    
+    @Observable volatile Core core    
 
     private long lastRetryTime = System.currentTimeMillis()
+    
+    UISettings uiSettings
         
     void updateTablePreservingSelection(String tableName) {
         def downloadTable = builder.getVariable(tableName)
@@ -72,11 +93,28 @@ class MainFrameModel {
     
     void mvcGroupInit(Map<String, Object> args) {
         
+        uiSettings = application.context.get("ui-settings")
+        
         Timer timer = new Timer("download-pumper", true)
         timer.schedule({
             runInsideUIAsync {
                 if (!mvcGroup.alive)
                     return
+                
+                // remove cancelled or finished downloads
+                def toRemove = []    
+                downloads.each {
+                    if (uiSettings.clearCancelledDownloads &&
+                        it.downloader.getCurrentState() == Downloader.DownloadState.CANCELLED)
+                        toRemove << it
+                    if (uiSettings.clearFinishedDownloads &&
+                        it.downloader.getCurrentState() == Downloader.DownloadState.FINISHED)
+                        toRemove << it
+                }
+                toRemove.each {
+                    downloads.remove(it)
+                }    
+                
                 builder.getVariable("uploads-table")?.model.fireTableDataChanged()
                 
                 updateTablePreservingSelection("downloads-table")
@@ -88,8 +126,10 @@ class MainFrameModel {
         application.addPropertyChangeListener("core", {e ->
             coreInitialized = (e.getNewValue() != null)
             core = e.getNewValue()
+            routerPresent = core.router != null
             me = core.me.getHumanReadableName()
             core.eventBus.register(UIResultEvent.class, this)
+            core.eventBus.register(UIResultBatchEvent.class, this)
             core.eventBus.register(DownloadStartedEvent.class, this)
             core.eventBus.register(ConnectionEvent.class, this)
             core.eventBus.register(DisconnectionEvent.class, this)
@@ -100,9 +140,16 @@ class MainFrameModel {
             core.eventBus.register(TrustEvent.class, this)
             core.eventBus.register(QueryEvent.class, this)
             core.eventBus.register(UpdateAvailableEvent.class, this)
+            core.eventBus.register(FileDownloadedEvent.class, this)
+            core.eventBus.register(FileUnsharedEvent.class, this)
+            core.eventBus.register(RouterDisconnectedEvent.class, this)
+            core.eventBus.register(AllFilesLoadedEvent.class, this)
+            core.eventBus.register(UpdateDownloadedEvent.class, this)
             
             timer.schedule({
-                int retryInterval = application.context.get("muwire-settings").downloadRetryInterval
+                if (core.shutdown.get())
+                    return
+                int retryInterval = core.muOptions.downloadRetryInterval
                 if (retryInterval > 0) {
                     retryInterval *= 60000
                     long now = System.currentTimeMillis()
@@ -110,7 +157,9 @@ class MainFrameModel {
                         lastRetryTime = now
                         runInsideUIAsync {
                             downloads.each {
-                                if (it.downloader.currentState == Downloader.DownloadState.FAILED)
+                                def state = it.downloader.currentState
+                                if (state == Downloader.DownloadState.FAILED || 
+                                    state == Downloader.DownloadState.DOWNLOADING)
                                     it.downloader.resume()
                                 updateTablePreservingSelection("downloads-table")
                             }
@@ -123,19 +172,43 @@ class MainFrameModel {
             runInsideUIAsync {
                 trusted.addAll(core.trustService.good.values())
                 distrusted.addAll(core.trustService.bad.values())
+                
+                
+                resumeButtonText = "Retry"
             }
         })
         
     }
     
+    void onAllFilesLoadedEvent(AllFilesLoadedEvent e) {
+        runInsideUIAsync {
+            watched.addAll(core.muOptions.watchedDirectories)
+            builder.getVariable("watched-directories-table").model.fireTableDataChanged()
+            watched.each { core.eventBus.publish(new FileSharedEvent(file : new File(it))) }
+        }
+    }
+    
+    void onUpdateDownloadedEvent(UpdateDownloadedEvent e) {
+        runInsideUIAsync {
+            JOptionPane.showMessageDialog(null, "MuWire $e.version has been downloaded.  You can update now", 
+                "Update Downloaded", JOptionPane.INFORMATION_MESSAGE)
+        }
+    }
+    
     void onUIResultEvent(UIResultEvent e) {
         MVCGroup resultsGroup = results.get(e.uuid)
         resultsGroup?.model.handleResult(e)
     }
     
+    void onUIResultBatchEvent(UIResultBatchEvent e) {
+        MVCGroup resultsGroup = results.get(e.uuid)
+        resultsGroup?.model.handleResultBatch(e.results)
+    }
+    
     void onDownloadStartedEvent(DownloadStartedEvent e) {
         runInsideUIAsync {
             downloads << e
+            downloadInfoHashes.add(e.downloader.infoHash)
         }
     }
     
@@ -150,7 +223,8 @@ class MainFrameModel {
                 topPanel.getLayout().show(topPanel, "top-search-panel")
             }
             
-            connectionList.add(e.endpoint.destination)
+            UIConnection con = new UIConnection(destination : e.endpoint.destination, incoming : e.incoming)
+            connectionList.add(con)
             JTable table = builder.getVariable("connections-table")
             table.model.fireTableDataChanged()
         }
@@ -165,7 +239,8 @@ class MainFrameModel {
                 topPanel.getLayout().show(topPanel, "top-connect-panel")
             }
             
-            connectionList.remove(e.destination)
+            UIConnection con = new UIConnection(destination : e.destination)
+            connectionList.remove(con)
             JTable table = builder.getVariable("connections-table")
             table.model.fireTableDataChanged()
         }
@@ -195,6 +270,17 @@ class MainFrameModel {
         }
     }
     
+    void onFileUnsharedEvent(FileUnsharedEvent e) {
+        InfoHash infohash = e.unsharedFile.infoHash
+        if (!infoHashes.remove(infohash))
+            return
+        runInsideUIAsync {
+            shared.remove(e.unsharedFile)
+            JTable table = builder.getVariable("shared-files-table")
+            table.model.fireTableDataChanged()
+        }
+    }
+    
     void onUploadEvent(UploadEvent e) {
         runInsideUIAsync {
             uploads << e.uploader
@@ -222,8 +308,10 @@ class MainFrameModel {
             updateTablePreservingSelection("trusted-table")
             updateTablePreservingSelection("distrusted-table")
             
-            results.values().each { 
-                it.view.pane.getClientProperty("results-table")?.model.fireTableDataChanged()
+            results.values().each { MVCGroup group -> 
+                if (group.alive) {
+                    group.view.pane.getClientProperty("results-table")?.model.fireTableDataChanged()
+                }
             }
         }
     }
@@ -231,14 +319,23 @@ class MainFrameModel {
     void onQueryEvent(QueryEvent e) {
         if (e.replyTo == core.me.destination)
             return
-        StringBuilder sb = new StringBuilder()
-        e.searchEvent.searchTerms?.each {
-            sb.append(it)
-            sb.append(" ")
+        
+        def search
+        if (e.searchEvent.searchHash != null) {
+            if (!uiSettings.showSearchHashes) {
+                return
+            }
+            search = Base64.encode(e.searchEvent.searchHash)
+        } else {
+            StringBuilder sb = new StringBuilder()
+            e.searchEvent.searchTerms?.each {
+                sb.append(it)
+                sb.append(" ")
+            }
+            search = sb.toString()
+            if (search.trim().size() == 0)
+                return
         }
-        def search = sb.toString()
-        if (search.trim().size() == 0)
-            return
         runInsideUIAsync {
             searches.addFirst(new IncomingSearch(search : search, replyTo : e.replyTo, originator : e.originator))
             while(searches.size() > 200)
@@ -256,7 +353,54 @@ class MainFrameModel {
     
     void onUpdateAvailableEvent(UpdateAvailableEvent e) {
         runInsideUIAsync {
-            JOptionPane.showMessageDialog(null, "A new version of MuWire is available from $e.signer.  Please update to $e.version")
+            
+            int option = JOptionPane.showConfirmDialog(null, 
+                "MuWire $e.version is available from $e.signer.  You have "+ metadata["application.version"]+" Update?",
+                "New MuWire version availble", JOptionPane.OK_CANCEL_OPTION)
+            if (option == JOptionPane.CANCEL_OPTION)
+                return
+            controller.search(e.infoHash,"MuWire update")
         }
     }
+    
+    void onRouterDisconnectedEvent(RouterDisconnectedEvent e) {
+        runInsideUIAsync {
+            JOptionPane.showMessageDialog(null, "MuWire lost connection to the I2P router and will now exit.",
+                "Connection to I2P router lost", JOptionPane.WARNING_MESSAGE)
+            System.exit(0)
+        }
+    }
+    
+    void onFileDownloadedEvent(FileDownloadedEvent e) {
+        if (!core.muOptions.shareDownloadedFiles)
+            return
+        infoHashes.add(e.downloadedFile.infoHash)
+        runInsideUIAsync {
+            shared << e.downloadedFile
+            JTable table = builder.getVariable("shared-files-table")
+            table.model.fireTableDataChanged()
+        }
+    }
+    
+    private static class UIConnection {
+        Destination destination
+        boolean incoming
+        
+        @Override
+        public int hashCode() {
+            destination.hashCode()
+        }
+        
+        @Override
+        public boolean equals(Object o) {
+            if (!(o instanceof UIConnection))
+                return false
+            UIConnection other = (UIConnection) o
+            return destination == other.destination
+        }
+    }
+    
+    boolean canDownload(InfoHash hash) {
+        !downloadInfoHashes.contains(hash)
+    }
 }

gui/griffon-app/models/com/muwire/gui/MuWireStatusModel.groovy

@@ -0,0 +1,25 @@
+package com.muwire.gui
+
+import javax.annotation.Nonnull
+
+import griffon.core.artifact.GriffonModel
+import griffon.inject.MVCMember
+import griffon.transform.Observable
+import griffon.metadata.ArtifactProviderFor
+
+@ArtifactProviderFor(GriffonModel)
+class MuWireStatusModel {
+    
+    @MVCMember @Nonnull
+    MuWireStatusController controller
+    
+    @Observable int incomingConnections
+    @Observable int outgoingConnections
+    @Observable int knownHosts
+    @Observable int sharedFiles
+    @Observable int downloads
+    
+    void mvcGroupInit(Map<String,String> args) {
+        controller.refresh()
+    }
+}

gui/griffon-app/models/com/muwire/gui/OptionsModel.groovy

@@ -1,5 +1,8 @@
 package com.muwire.gui
 
+import com.muwire.core.Core
+import com.muwire.core.MuWireSettings
+
 import griffon.core.artifact.GriffonModel
 import griffon.transform.Observable
 import griffon.metadata.ArtifactProviderFor
@@ -8,9 +11,61 @@ import griffon.metadata.ArtifactProviderFor
 class OptionsModel {
     @Observable String downloadRetryInterval 
     @Observable String updateCheckInterval
+    @Observable boolean autoDownloadUpdate
+    @Observable boolean onlyTrusted
+    @Observable boolean shareDownloadedFiles
+    @Observable String downloadLocation
+    
+    // i2p options
+    @Observable String inboundLength
+    @Observable String inboundQuantity
+    @Observable String outboundLength
+    @Observable String outboundQuantity
+    @Observable String i2pUDPPort
+    @Observable String i2pNTCPPort
+    
+    // gui options
+    @Observable boolean showMonitor
+    @Observable String lnf
+    @Observable String font
+    @Observable boolean clearCancelledDownloads
+    @Observable boolean clearFinishedDownloads
+    @Observable boolean excludeLocalResult
+    @Observable boolean showSearchHashes
+    
+    // bw options
+    @Observable String inBw
+    @Observable String outBw
     
     void mvcGroupInit(Map<String, String> args) {
-        downloadRetryInterval = application.context.get("muwire-settings").downloadRetryInterval
-        updateCheckInterval = application.context.get("muwire-settings").updateCheckInterval
+        MuWireSettings settings = application.context.get("muwire-settings")
+        downloadRetryInterval = settings.downloadRetryInterval
+        updateCheckInterval = settings.updateCheckInterval
+        autoDownloadUpdate = settings.autoDownloadUpdate
+        onlyTrusted = !settings.allowUntrusted()
+        shareDownloadedFiles = settings.shareDownloadedFiles
+        downloadLocation = settings.downloadLocation.getAbsolutePath()
+        
+        Core core = application.context.get("core")
+        inboundLength = core.i2pOptions["inbound.length"]
+        inboundQuantity = core.i2pOptions["inbound.quantity"]
+        outboundLength = core.i2pOptions["outbound.length"]
+        outboundQuantity = core.i2pOptions["outbound.quantity"]
+        i2pUDPPort = core.i2pOptions["i2np.udp.port"]
+        i2pNTCPPort = core.i2pOptions["i2np.ntcp.port"]
+        
+        UISettings uiSettings = application.context.get("ui-settings")
+        showMonitor = uiSettings.showMonitor
+        lnf = uiSettings.lnf
+        font = uiSettings.font
+        clearCancelledDownloads = uiSettings.clearCancelledDownloads
+        clearFinishedDownloads = uiSettings.clearFinishedDownloads
+        excludeLocalResult = uiSettings.excludeLocalResult
+        showSearchHashes = uiSettings.showSearchHashes
+        
+        if (core.router != null) {
+            inBw = String.valueOf(settings.inBw)
+            outBw = String.valueOf(settings.outBw)
+        }
     }
 }