Stop keepalive when socket closes

// FREEBIE

libtextsecure/websocket-resources.js

@@ -92,11 +92,6 @@
             return new OutgoingWebSocketRequest(options, socket);
         };
 
-        this.close = function(code, reason) {
-            if (!code) { code = 3000; }
-            socket.close(code, reason);
-        };
-
         socket.onmessage = function(socketMessage) {
             var blob = socketMessage.data;
             var reader = new FileReader();
@@ -134,14 +129,24 @@
             reader.readAsArrayBuffer(blob);
         };
 
+        var keepalive;
         if (opts.keepalive) {
-            var keepalive = new KeepAlive(this, {
+            keepalive = new KeepAlive(this, {
                 path       : opts.keepalive.path,
                 disconnect : opts.keepalive.disconnect
             });
 
             this.resetKeepAliveTimer = keepalive.reset.bind(keepalive);
         }
+
+        this.close = function(code, reason) {
+            if (!code) { code = 3000; }
+            socket.close(code, reason);
+            if (keepalive) {
+                keepalive.close();
+            }
+        };
+
     };
 
     function KeepAlive(websocketResource, opts) {
@@ -164,6 +169,10 @@
 
     KeepAlive.prototype = {
         constructor: KeepAlive,
+        close: function() {
+            clearTimeout(this.keepAliveTimer);
+            clearTimeout(this.disconnectTimer);
+        },
         reset: function() {
             clearTimeout(this.keepAliveTimer);
             clearTimeout(this.disconnectTimer);