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/handle.h"
  15 #include "gin/object_template_builder.h"
  16 #include "third_party/WebKit/public/web/WebFrame.h"
  17 #include "third_party/WebKit/public/web/WebKit.h"
  18 #include "ui/base/webui/jstemplate_builder.h"
  19
  20 using blink::WebFrame;
  21 using blink::WebPlugin;
  22 using blink::WebURLRequest;
  23
  24 const char* const kSlashVSlash = "/v/";
  25 const char* const kSlashESlash = "/e/";
  26
  27 namespace {
  28
  29 std::string GetYoutubeVideoId(const blink::WebPluginParams& params) {
  30   GURL url(params.url);
  31   std::string video_id = url.path().substr(strlen(kSlashVSlash));
  32
  33   // Extract just the video id
  34   size_t video_id_end = video_id.find('&');
  35   if (video_id_end != std::string::npos)
  36     video_id = video_id.substr(0, video_id_end);
  37   return video_id;
  38 }
  39
  40 std::string HtmlData(const blink::WebPluginParams& params,
  41                      base::StringPiece template_html) {
  42   base::DictionaryValue values;
  43   values.SetString("video_id", GetYoutubeVideoId(params));
  44   return webui::GetI18nTemplateHtml(template_html, &values);
  45 }
  46
  47 bool IsValidYouTubeVideo(const std::string& path) {
  48   unsigned len = strlen(kSlashVSlash);
  49
  50   // check for more than just /v/ or /e/.
  51   if (path.length() <= len)
  52     return false;
  53
  54   std::string str = base::StringToLowerASCII(path);
  55   // Youtube flash url can start with /v/ or /e/.
  56   if (strncmp(str.data(), kSlashVSlash, len) != 0 &&
  57       strncmp(str.data(), kSlashESlash, len) != 0)
  58     return false;
  59
  60   // Start after /v/
  61   for (unsigned i = len; i < path.length(); i++) {
  62     char c = str[i];
  63     if (isalpha(c) || isdigit(c) || c == '_' || c == '-')
  64       continue;
  65     // The url can have more parameters such as &hl=en after the video id.
  66     // Once we start seeing extra parameters we can return true.
  67     return c == '&' && i > len;
  68   }
  69   return true;
  70 }
  71
  72 }  // namespace
  73
  74 namespace plugins {
  75
  76 MobileYouTubePlugin::MobileYouTubePlugin(content::RenderFrame* render_frame,
  77                                          blink::WebLocalFrame* frame,
  78                                          const blink::WebPluginParams& params,
  79                                          base::StringPiece& template_html,
  80                                          GURL placeholderDataUrl)
  81     : PluginPlaceholder(render_frame,
  82                         frame,
  83                         params,
  84                         HtmlData(params, template_html),
  85                         placeholderDataUrl) {}
  86
  87 MobileYouTubePlugin::~MobileYouTubePlugin() {}
  88
  89 // static
  90 bool MobileYouTubePlugin::IsYouTubeURL(const GURL& url,
  91                                        const std::string& mime_type) {
  92   std::string host = url.host();
  93   bool is_youtube = EndsWith(host, "youtube.com", true) ||
  94                     EndsWith(host, "youtube-nocookie.com", true);
  95
  96   return is_youtube && IsValidYouTubeVideo(url.path()) &&
  97          LowerCaseEqualsASCII(mime_type, 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 void MobileYouTubePlugin::BindWebFrame(WebFrame* frame) {
 111   v8::Isolate* isolate = blink::mainThreadIsolate();
 112   v8::HandleScope handle_scope(isolate);
 113   v8::Local<v8::Context> context = frame->mainWorldScriptContext();
 114   DCHECK(!context.IsEmpty());
 115
 116   v8::Context::Scope context_scope(context);
 117   v8::Local<v8::Object> global = context->Global();
 118   global->Set(gin::StringToV8(isolate, "plugin"),
 119               gin::CreateHandle(isolate, this).ToV8());
 120 }
 121
 122 gin::ObjectTemplateBuilder MobileYouTubePlugin::GetObjectTemplateBuilder(
 123     v8::Isolate* isolate) {
 124   return PluginPlaceholder::GetObjectTemplateBuilder(isolate)
 125     .SetMethod("openYoutubeURL", &MobileYouTubePlugin::OpenYoutubeUrlCallback);
 126 }
 127
 128 }  // namespace plugins