chrome.experimental.downloads

chrome/renderer/resources/extension_process_bindings.js

 // Copyright (c) 2011 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 privileged chrome extension related javascript APIs.
 // It is loaded by pages whose URL has the chrome-extension protocol.
 
 var chrome = chrome || {};
 (function() {
   native function GetExtensionAPIDefinition();
@@ skipping 724 matching lines @@
         try {
           if (responseCallback)
             responseCallback(response);
         } finally {
           port.disconnect();
           port = null;
         }
       });
     };
 
+    apiFunctions["experimental.downloads.download"].customCallback =

[Sam Kerner (Chrome), 2011/06/21 03:37:40]

Why do you need to set a custom callback?

[bSh, 2011/06/24 19:46:25]

This is the only way to pass more than one parameter to the extension's
callback. This customCallback wouldn't be necessary if we merged the error
parameter with chrome.extensions.lastError.

+      function(name, request, response) {
+        if (response) {
+          response = chromeHidden.JSON.parse(response);
+        } else {
+          response = {};
+        }
+        if (request.callback) {
+          request.callback(response["id"], response["error"]);
+        }
+        request.callback = null;
+      };
+
     apiFunctions["fileBrowserPrivate.requestLocalFileSystem"].customCallback =
       function(name, request, response) {
         var resp = response ? [chromeHidden.JSON.parse(response)] : [];
         var fs = null;
         if (!resp[0].error)
           fs = GetLocalFileSystem(resp[0].name, resp[0].path);
         if (request.callback)
           request.callback(fs);
         request.callback = null;
       };
@@ skipping 246 matching lines @@
 
   if (!chrome.experimental)
     chrome.experimental = {};
 
   if (!chrome.experimental.accessibility)
     chrome.experimental.accessibility = {};
 
   if (!chrome.experimental.tts)
     chrome.experimental.tts = {};
 })();