extension_message_handler.cc revision ddb351dbec246cf1fab5ec20d2d5520909041de1 
1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/extensions/extension_message_handler.h"
6
7#include "chrome/browser/extensions/extension_message_service.h"
8#include "chrome/browser/profiles/profile.h"
9#include "chrome/common/extensions/extension_messages.h"
10#include "content/browser/child_process_security_policy.h"
11#include "content/browser/renderer_host/render_process_host.h"
12#include "content/browser/renderer_host/render_view_host.h"
13#include "content/browser/renderer_host/render_view_host_delegate.h"
14
15ExtensionMessageHandler::ExtensionMessageHandler(
16    RenderViewHost* render_view_host)
17    : RenderViewHostObserver(render_view_host) {
18}
19
20ExtensionMessageHandler::~ExtensionMessageHandler() {
21}
22
23bool ExtensionMessageHandler::OnMessageReceived(
24    const IPC::Message& message) {
25  bool handled = true;
26  IPC_BEGIN_MESSAGE_MAP(ExtensionMessageHandler, message)
27    IPC_MESSAGE_HANDLER(ExtensionHostMsg_PostMessage, OnPostMessage)
28    IPC_MESSAGE_HANDLER(ExtensionHostMsg_Request, OnRequest)
29    IPC_MESSAGE_UNHANDLED(handled = false)
30  IPC_END_MESSAGE_MAP()
31  return handled;
32}
33
34void ExtensionMessageHandler::OnPostMessage(int port_id,
35                                            const std::string& message) {
36  Profile* profile = render_view_host()->process()->profile();
37  if (profile->GetExtensionMessageService()) {
38    profile->GetExtensionMessageService()->PostMessageFromRenderer(
39        port_id, message);
40  }
41}
42
43void ExtensionMessageHandler::OnRequest(
44    const ExtensionHostMsg_DomMessage_Params& params) {
45  if (!ChildProcessSecurityPolicy::GetInstance()->
46          HasExtensionBindings(render_view_host()->process()->id())) {
47    // This can happen if someone uses window.open() to open an extension URL
48    // from a non-extension context.
49    Send(new ExtensionMsg_Response(
50        routing_id(), params.request_id, false, std::string(),
51        "Access to extension API denied."));
52    return;
53  }
54
55  render_view_host()->delegate()->ProcessWebUIMessage(params);
56}
57