1 // Copyright 2014 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/android/meta_tag_observer.h"
6
7 #include "chrome/common/chrome_constants.h"
8 #include "chrome/common/render_messages.h"
9 #include "content/public/browser/render_view_host.h"
10 #include "content/public/browser/web_contents.h"
11 #include "content/public/browser/web_contents_observer.h"
12
MetaTagObserver(const std::string & meta_tag)13 MetaTagObserver::MetaTagObserver(const std::string& meta_tag)
14 : meta_tag_(meta_tag) {
15 if (meta_tag_.size() > chrome::kMaxMetaTagAttributeLength) {
16 VLOG(1) << "Length of the <meta> name attribute is too large.";
17 NOTREACHED();
18 }
19 }
20
~MetaTagObserver()21 MetaTagObserver::~MetaTagObserver() {
22 }
23
DidFinishLoad(int64 frame_id,const GURL & validated_url,bool is_main_frame,content::RenderViewHost * render_view_host)24 void MetaTagObserver::DidFinishLoad(
25 int64 frame_id,
26 const GURL& validated_url,
27 bool is_main_frame,
28 content::RenderViewHost* render_view_host) {
29 if (!is_main_frame) return;
30 validated_url_ = validated_url;
31 Send(new ChromeViewMsg_RetrieveMetaTagContent(routing_id(),
32 validated_url,
33 meta_tag_));
34 }
35
OnMessageReceived(const IPC::Message & message)36 bool MetaTagObserver::OnMessageReceived(const IPC::Message& message) {
37 bool handled = true;
38 IPC_BEGIN_MESSAGE_MAP(MetaTagObserver, message)
39 IPC_MESSAGE_HANDLER(ChromeViewHostMsg_DidRetrieveMetaTagContent,
40 OnDidRetrieveMetaTagContent)
41 IPC_MESSAGE_UNHANDLED(handled = false)
42 IPC_END_MESSAGE_MAP()
43 return handled;
44 }
45
OnDidRetrieveMetaTagContent(bool success,const std::string & tag_name,const std::string & tag_content,const GURL & expected_url)46 void MetaTagObserver::OnDidRetrieveMetaTagContent(
47 bool success,
48 const std::string& tag_name,
49 const std::string& tag_content,
50 const GURL& expected_url) {
51 if (!success || tag_name != meta_tag_ || validated_url_ != expected_url ||
52 tag_content.size() >= chrome::kMaxMetaTagAttributeLength) {
53 return;
54 }
55 HandleMetaTagContent(tag_content, expected_url);
56 }
57