components/plugins/renderer/mobile_youtube_plugin.cc

   1 // Copyright 2013 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 "components/plugins/renderer/mobile_youtube_plugin.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/strings/string_piece.h"
  10 #include "base/strings/string_util.h"
  11 #include "base/values.h"
  12 #include "content/public/common/content_constants.h"
  13 #include "content/public/renderer/render_frame.h"
  14 #include "gin/object_template_builder.h"
  15 #include "third_party/WebKit/public/web/WebFrame.h"
  16 #include "ui/base/webui/jstemplate_builder.h"
  17
  18 using blink::WebFrame;
  19 using blink::WebPlugin;
  20 using blink::WebURLRequest;
  21
  22 const char* const kSlashVSlash = "/v/";
  23 const char* const kSlashESlash = "/e/";
  24
  25 namespace {
  26
  27 std::string GetYoutubeVideoId(const blink::WebPluginParams& params) {
  28   GURL url(params.url);
  29   std::string video_id = url.path().substr(strlen(kSlashVSlash));
  30
  31   // Extract just the video id
  32   size_t video_id_end = video_id.find('&');
  33   if (video_id_end != std::string::npos)
  34     video_id = video_id.substr(0, video_id_end);
  35   return video_id;
  36 }
  37
  38 std::string HtmlData(const blink::WebPluginParams& params,
  39                      base::StringPiece template_html) {
  40   base::DictionaryValue values;
  41   values.SetString("video_id", GetYoutubeVideoId(params));
  42   return webui::GetI18nTemplateHtml(template_html, &values);
  43 }
  44
  45 bool IsValidYouTubeVideo(const std::string& path) {
  46   unsigned len = strlen(kSlashVSlash);
  47
  48   // check for more than just /v/ or /e/.
  49   if (path.length() <= len)
  50     return false;
  51
  52   std::string str = base::StringToLowerASCII(path);
  53   // Youtube flash url can start with /v/ or /e/.
  54   if (strncmp(str.data(), kSlashVSlash, len) != 0 &&
  55       strncmp(str.data(), kSlashESlash, len) != 0)
  56     return false;
  57
  58   // Start after /v/
  59   for (unsigned i = len; i < path.length(); i++) {
  60     char c = str[i];
  61     if (isalpha(c) || isdigit(c) || c == '_' || c == '-')
  62       continue;
  63     // The url can have more parameters such as &hl=en after the video id.
  64     // Once we start seeing extra parameters we can return true.
  65     return c == '&' && i > len;
  66   }
  67   return true;
  68 }
  69
  70 }  // namespace
  71
  72 namespace plugins {
  73
  74 gin::WrapperInfo MobileYouTubePlugin::kWrapperInfo = {gin::kEmbedderNativeGin};
  75
  76 MobileYouTubePlugin::MobileYouTubePlugin(content::RenderFrame* render_frame,
  77                                          blink::WebLocalFrame* frame,
  78                                          const blink::WebPluginParams& params,
  79                                          base::StringPiece& template_html)
  80     : PluginPlaceholderBase(render_frame,
  81                             frame,
  82                             params,
  83                             HtmlData(params, template_html)) {
  84 }
  85
  86 MobileYouTubePlugin::~MobileYouTubePlugin() {}
  87
  88 // static
  89 bool MobileYouTubePlugin::IsYouTubeURL(const GURL& url,
  90                                        const std::string& mime_type) {
  91   std::string host = url.host();
  92   bool is_youtube = EndsWith(host, "youtube.com", true) ||
  93                     EndsWith(host, "youtube-nocookie.com", true);
  94
  95   return is_youtube && IsValidYouTubeVideo(url.path()) &&
  96          base::LowerCaseEqualsASCII(mime_type,
  97                                     content::kFlashPluginSwfMimeType);
  98 }
  99
 100 void MobileYouTubePlugin::OpenYoutubeUrlCallback() {
 101   std::string youtube("vnd.youtube:");
 102   GURL url(youtube.append(GetYoutubeVideoId(GetPluginParams())));
 103   WebURLRequest request;
 104   request.initialize();
 105   request.setURL(url);
 106   render_frame()->LoadURLExternally(
 107       GetFrame(), request, blink::WebNavigationPolicyNewForegroundTab);
 108 }
 109
 110 v8::Local<v8::Value> MobileYouTubePlugin::GetV8Handle(v8::Isolate* isolate) {
 111   return gin::CreateHandle(isolate, this).ToV8();
 112 }
 113
 114 gin::ObjectTemplateBuilder MobileYouTubePlugin::GetObjectTemplateBuilder(
 115     v8::Isolate* isolate) {
 116   return gin::Wrappable<MobileYouTubePlugin>::GetObjectTemplateBuilder(isolate)
 117       .SetMethod("openYoutubeURL",
 118                  &MobileYouTubePlugin::OpenYoutubeUrlCallback);
 119 }
 120
 121 }  // namespace plugins