1 files changed, 100 insertions, 0 deletions
diff --git a/toolkit/mozapps/extensions/amContentHandler.js b/toolkit/mozapps/extensions/amContentHandler.js
new file mode 100644
index 000000000..708f670b1
--- /dev/null
+++ b/toolkit/mozapps/extensions/amContentHandler.js
@@ -0,0 +1,100 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cr = Components.results;
+
+const XPI_CONTENT_TYPE = "application/x-xpinstall";
+const MSG_INSTALL_ADDONS = "WebInstallerInstallAddonsFromWebpage";
+
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+Components.utils.import("resource://gre/modules/Services.jsm");
+
+function amContentHandler() {
+}
+
+amContentHandler.prototype = {
+  /**
+   * Handles a new request for an application/x-xpinstall file.
+   *
+   * @param  aMimetype
+   *         The mimetype of the file
+   * @param  aContext
+   *         The context passed to nsIChannel.asyncOpen
+   * @param  aRequest
+   *         The nsIRequest dealing with the content
+   */
+  handleContent: function XCH_handleContent(aMimetype, aContext, aRequest) {
+    if (aMimetype != XPI_CONTENT_TYPE)
+      throw Cr.NS_ERROR_WONT_HANDLE_CONTENT;
+
+    if (!(aRequest instanceof Ci.nsIChannel))
+      throw Cr.NS_ERROR_WONT_HANDLE_CONTENT;
+
+    let uri = aRequest.URI;
+
+    let window = null;
+    let callbacks = aRequest.notificationCallbacks ?
+                    aRequest.notificationCallbacks :
+                    aRequest.loadGroup.notificationCallbacks;
+    if (callbacks)
+      window = callbacks.getInterface(Ci.nsIDOMWindow);
+
+    aRequest.cancel(Cr.NS_BINDING_ABORTED);
+
+    let installs = {
+      uris: [uri.spec],
+      hashes: [null],
+      names: [null],
+      icons: [null],
+      mimetype: XPI_CONTENT_TYPE,
+      triggeringPrincipal: aRequest.loadInfo.triggeringPrincipal,
+      callbackID: -1
+    };
+
+    if (Services.appinfo.processType == Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT) {
+      // When running in the main process this might be a frame inside an
+      // in-content UI page, walk up to find the first frame element in a chrome
+      // privileged document
+      let element = window.frameElement;
+      let ssm = Services.scriptSecurityManager;
+      while (element && !ssm.isSystemPrincipal(element.ownerDocument.nodePrincipal))
+        element = element.ownerDocument.defaultView.frameElement;
+
+      if (element) {
+        let listener = Cc["@mozilla.org/addons/integration;1"].
+                       getService(Ci.nsIMessageListener);
+        listener.wrappedJSObject.receiveMessage({
+          name: MSG_INSTALL_ADDONS,
+          target: element,
+          data: installs,
+        });
+        return;
+      }
+    }
+
+    // Fall back to sending through the message manager
+    let messageManager = window.QueryInterface(Ci.nsIInterfaceRequestor)
+                               .getInterface(Ci.nsIDocShell)
+                               .QueryInterface(Ci.nsIInterfaceRequestor)
+                               .getInterface(Ci.nsIContentFrameMessageManager);
+
+    messageManager.sendAsyncMessage(MSG_INSTALL_ADDONS, installs);
+  },
+
+  classID: Components.ID("{7beb3ba8-6ec3-41b4-b67c-da89b8518922}"),
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIContentHandler]),
+
+  log : function XCH_log(aMsg) {
+    let msg = "amContentHandler.js: " + (aMsg.join ? aMsg.join("") : aMsg);
+    Cc["@mozilla.org/consoleservice;1"].getService(Ci.nsIConsoleService).
+      logStringMessage(msg);
+    dump(msg + "\n");
+  }
+};
+
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory([amContentHandler]);