Use postMessage to communicate from parent to child. Fixes #532

index.js

@@ -36,10 +36,6 @@ var DumbPipe = {
   // Functions that receive messages from the other side for active pipes.
   recipients: {},
 
-  // Queue of messages to send to the other side.  Retrieved by the other side
-  // via a "get" message.
-  outgoingMessages: [],
-
   // Every time we want to make the other side retrieve messages, the hash
   // of the other side's web page has to change, so we increment it.
   nextHashID: 0,
@@ -76,9 +72,6 @@ var DumbPipe = {
         //console.log("outer recv: " + JSON.stringify(envelope));
         this.receiveMessage(envelope.pipeID, envelope.message);
         break;
-      case "get":
-        this.getMessages(event);
-        break;
       case "close":
         //console.log("outer recv: " + JSON.stringify(envelope));
         this.closePipe(envelope.pipeID);
@@ -109,12 +102,12 @@ var DumbPipe = {
     // Oh my shod, that's some funky git!
     var envelope = { pipeID: pipeID, message: message };
     //console.log("outer send: " + JSON.stringify(envelope));
-    this.outgoingMessages.push(envelope);
 
-    var mozbrowser = document.getElementById("mozbrowser");
-    window.setZeroTimeout(function() {
-      mozbrowser.src = mozbrowser.src.split("#")[0] + "#" + this.nextHashID++;
-    }.bind(this));
+    try {
+      document.getElementById("mozbrowser").contentWindow.postMessage(envelope, "*");
+    } catch (e) {
+      console.log("Error " + e + " while sending message: " + JSON.stringify(message));
+    }
   },
 
   receiveMessage: function(pipeID, message, detail) {
@@ -132,17 +125,6 @@ var DumbPipe = {
     }.bind(this));
   },
 
-  getMessages: function(event) {
-    try {
-      event.detail.returnValue = JSON.stringify(this.outgoingMessages);
-    } catch(ex) {
-      console.error("failed to stringify outgoing messages: " + ex);
-    } finally {
-      this.outgoingMessages = [];
-      event.detail.unblock();
-    }
-  },
-
   closePipe: function(pipeID) {
     delete this.recipients[pipeID];
   }
@@ -226,11 +208,7 @@ DumbPipe.registerOpener("socket", function(message, sender) {
   }
 
   socket.ondata = function(event) {
-    // Turn the buffer into a regular Array to traverse the mozbrowser boundary.
-    var array = Array.prototype.slice.call(new Uint8Array(event.data));
-    array.constructor = Array;
-
-    sender({ type: "data", data: array });
+    sender({ type: "data", data: event.data });
   }
 
   socket.ondrain = function(event) {

libs/pipe.js

@@ -78,29 +78,13 @@ var DumbPipe = {
     }
   },
 
-  handleEvent: function(event) {
-    // To ensure we don't fill up the browser history over time, we navigate
-    // "back" every time the other side navigates us "forward" by changing
-    // the hash.  This will trigger a second hashchange event; to avoid getting
-    // messages twice, we only get them for the second hashchange event,
-    // i.e. once we've returned to the hashless page, at which point a second
-    // call to window.history.back() will have had no effect.
-    //
-    // We only do this when we're in mozbrowser (i.e. window.parent === window),
-    // since window.history.back() affects the parent window otherwise.
-    //
-    if (window.parent === window) {
-      var hash = window.location.hash;
-      window.history.back();
-      if (window.location.hash != hash) {
+  receiveMessage: function(event) {
+    var envelope = event.data;
+
+    if (envelope === "zero-timeout-message") {
       return;
     }
-    }
 
-    this.send({ command: "get" }, function(envelopes) {
-      envelopes.forEach((function(envelope) {
-        //console.log("inner recv: " + JSON.stringify(envelope));
-        window.setZeroTimeout(function() {
     if (this.recipients[envelope.pipeID]) {
       try {
         this.recipients[envelope.pipeID](envelope.message);
@@ -111,13 +95,10 @@ var DumbPipe = {
       console.warn("nonexistent pipe " + envelope.pipeID + " received message " +
                    JSON.stringify(envelope.message));
     }
-        }.bind(this));
-      }).bind(this));
-    }.bind(this));
   },
 };
 
-window.addEventListener("hashchange", DumbPipe.handleEvent.bind(DumbPipe), false);
+window.addEventListener("message", DumbPipe.receiveMessage.bind(DumbPipe), false);
 
 // If "mozbrowser" isn't enabled on the frame we're loaded in, then override
 // the alert/prompt functions to funnel messages to the endpoint in the parent.

midp/socket.js

@@ -80,9 +80,10 @@ Native.create("com/sun/midp/io/j2me/socket/Protocol.open0.([BI)V", function(ipBy
 
         this.socket.ondata = (function(message) {
             // console.log("this.socket.ondata: " + JSON.stringify(message));
-            var newArray = new Uint8Array(this.data.byteLength + message.data.length);
+            var newData = new Uint8Array(message.data);
+            var newArray = new Uint8Array(this.data.byteLength + newData.byteLength);
             newArray.set(this.data);
-            newArray.set(message.data, this.data.byteLength);
+            newArray.set(newData, this.data.byteLength);
             this.data = newArray;
 
             if (this.waitingData) {