Native Messaging!

chrome/renderer/resources/extensions/miscellaneous_bindings.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This script contains unprivileged javascript APIs related to chrome
 // extensions.  It is loaded by any extension-related context, such as content
 // scripts or background pages.
 // See user_script_slave.cc for script that is loaded by content scripts only.
 
   require('json_schema');
   require('event_bindings');
   var lastError = require('lastError');
   var miscNatives = requireNative('miscellaneous_bindings');
   var CloseChannel = miscNatives.CloseChannel;
   var PortAddRef = miscNatives.PortAddRef;
   var PortRelease = miscNatives.PortRelease;
   var PostMessage = miscNatives.PostMessage;
   var BindToGC = miscNatives.BindToGC;
 
   var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
 
   var processNatives = requireNative('process');
   var manifestVersion = processNatives.GetManifestVersion();
   var extensionId = processNatives.GetExtensionId();
 
   // The reserved channel name for the sendRequest/sendMessage APIs.
   // Note: sendRequest is deprecated.
   chromeHidden.kRequestChannel = "chrome.extension.sendRequest";
   chromeHidden.kMessageChannel = "chrome.extension.sendMessage";
+  chromeHidden.kNativeMessageChannel = "chrome.extension.sendNativeMessage";
 
   // Map of port IDs to port object.
   var ports = {};
 
   // Map of port IDs to chromeHidden.onUnload listeners. Keep track of these
   // to free the onUnload listeners when ports are closed.
   var portReleasers = {};
 
   // Change even to odd and vice versa, to get the other side of a given
   // channel.
@@ skipping 135 matching lines @@
       });
       return true;
     }
     return false;
   }
 
   // Called by native code when a channel has been opened to this context.
   chromeHidden.Port.dispatchOnConnect = function(portId, channelName, tab,
                                                  sourceExtensionId,
                                                  targetExtensionId) {
+    // Native connections only require one end in JS.
+    if (targetExtensionId == "native")

[Matt Perry, 2012/08/09 02:13:00]

This shouldn't happen if you remove the DispatchOnConnect in
extension_message_service.cc

[eaugusti, 2012/08/13 23:22:34]

Done.

+      return true;
+
     // Only create a new Port if someone is actually listening for a connection.
     // In addition to being an optimization, this also fixes a bug where if 2
     // channels were opened to and from the same process, closing one would
     // close both.
     if (targetExtensionId != extensionId)
       return false;  // not for us
     if (ports[getOppositePortId(portId)])
       return false;  // this channel was opened by us, so ignore it
 
     // Determine whether this is coming from another extension, so we can use
@@ skipping 88 matching lines @@
     });
     port.onMessage.addListener(function(response) {
       try {
         responseCallback(response);
       } finally {
         port.disconnect();
         port = null;
       }
     });
   }