No longer close xfer connections on ice state disconnected and instead sed bye message when downloader does no longer require a connection.

doc/CHANNELING-API.txt

@@ -687,6 +687,17 @@ File sharing data channel protocol
         sequentially, and waiting for each chunk to be complete before
         sending the request for the next one.
 
+      JSON bye request
+
+        {
+            "m": "bye"
+        }
+
+        This is used to clean up connections when the downloader is finished
+        or has manually aborted downloading. The downloader sends this message
+        to the connected peer which then may close the connection where this
+        message was received.
+
 
 End of Channeling API.
 

static/js/mediastream/peerxfer.js

@@ -58,13 +58,6 @@ define(['jquery', 'underscore', 'mediastream/peercall', 'mediastream/tokens', 'w
 			data._id = this.id;
 		}, this));
 
-		this.e.on("connectionStateChange", _.bind(function(event, iceConnectionState) {
-			if (iceConnectionState === "disconnected") {
-				// Auto cleanup stuff when we get disconnected.
-				this.close();
-			}
-		}, this));
-
 	};
 
 	// Inherit from PeerCall.
@@ -78,7 +71,7 @@ define(['jquery', 'underscore', 'mediastream/peercall', 'mediastream/tokens', 'w
 	PeerXfer.prototype.cancel = function() {
 		this.e.triggerHandler("cancel", [this]);
 		this.close();
-	}
+	};
 
 	PeerXfer.prototype.onMessage = function(event) {
 		// Our own datachannel event.

static/js/services/filedownload.js

@@ -20,7 +20,7 @@
  */
 define(["jquery", "underscore"], function($, _) {
 
-	return ["fileData", "fileTransfer", "$window", "mediaStream", "safeApply", function(fileData, fileTransfer, $window, mediaStream, safeApply) {
+	return ["fileData", "fileTransfer", "$window", "mediaStream", "safeApply", "$timeout", function(fileData, fileTransfer, $window, mediaStream, safeApply, $timeout) {
 
 		var downloads = 0;
 
@@ -57,9 +57,14 @@ define(["jquery", "underscore"], function($, _) {
 			$window.clearInterval(this.interval);
 			this.interval = null;
 
-			// close all known xfers.
+			// Close all known xfers.
 			_.each(this.xfer_all, function(xfer) {
+				// Implement own clean up message.
+				// NOTE(longsleep): See https://code.google.com/p/webrtc/issues/detail?id=1676 for reason.
+				xfer.send({m: "bye"});
+				$timeout(function() {
 					xfer.cancel();
+				}, 0);
 			});
 			_.each(this.jobs, function(job) {
 				job.stop = true;

static/js/services/fileupload.js

@@ -112,6 +112,10 @@ define(["jquery", "underscore", "webrtc.adapter"], function($, _) {
 					});
 				}, this));
 				break;
+			case "bye":
+				// Close this xfer.
+				xfer.cancel();
+				break;
 			default:
 				console.log("Unknown xfer control request", msg.m, msg);
 				break;