give it a port flag to determine a default port for the webUI

lib/cors.go

@@ -24,8 +24,8 @@ var (
 	connDone = make(chan uint64)
 )
 
-func Listen() net.Listener {
-	ln, err := net.Listen("tcp", "127.0.0.1:0")
+func Listen(port string) net.Listener {
+	ln, err := net.Listen("tcp", "127.0.0.1:"+port)
 	if err != nil {
 		log.Fatal(err)
 	}

lib/launch.go

@@ -7,8 +7,8 @@ import (
 	"github.com/webview/webview"
 )
 
-func Launch() {
-	ln := Listen()
+func Launch(port string) {
+	ln := Listen(port)
 	defer ln.Close()
 	debug := true
 	w := webview.New(debug)

main.go

@@ -3,9 +3,16 @@
 package main
 
 import (
+  "flag"
+  
 	"github.com/eyedeekay/toopie.html/lib"
 )
 
+var (
+  port := flag.String("port", "0", "Port to run the web interface on, default is randomly assigned.")
+)
+
 func main() {
-	toopie.Launch()
+  flag.Parse()
+	toopie.Launch(*port)
 }