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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