src/chrome/renderer/extensions/extension_localization_peer.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 "chrome/renderer/extensions/extension_localization_peer.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "base/strings/string_util.h"
   9 #include "chrome/common/extensions/extension_messages.h"
  10 #include "chrome/common/extensions/message_bundle.h"
  11 #include "chrome/common/url_constants.h"
  12 #include "extensions/common/constants.h"
  13 #include "grit/generated_resources.h"
  14 #include "net/base/net_errors.h"
  15 #include "net/http/http_response_headers.h"
  16
  17 ExtensionLocalizationPeer::ExtensionLocalizationPeer(
  18     webkit_glue::ResourceLoaderBridge::Peer* peer,
  19     IPC::Sender* message_sender,
  20     const GURL& request_url)
  21     : original_peer_(peer),
  22       message_sender_(message_sender),
  23       request_url_(request_url) {
  24 }
  25
  26 ExtensionLocalizationPeer::~ExtensionLocalizationPeer() {
  27 }
  28
  29 // static
  30 ExtensionLocalizationPeer*
  31 ExtensionLocalizationPeer::CreateExtensionLocalizationPeer(
  32     webkit_glue::ResourceLoaderBridge::Peer* peer,
  33     IPC::Sender* message_sender,
  34     const std::string& mime_type,
  35     const GURL& request_url) {
  36   // Return NULL if content is not text/css or it doesn't belong to extension
  37   // scheme.
  38   return (request_url.SchemeIs(extensions::kExtensionScheme) &&
  39           StartsWithASCII(mime_type, "text/css", false)) ?
  40       new ExtensionLocalizationPeer(peer, message_sender, request_url) : NULL;
  41 }
  42
  43 void ExtensionLocalizationPeer::OnUploadProgress(
  44     uint64 position, uint64 size) {
  45   NOTREACHED();
  46 }
  47
  48 bool ExtensionLocalizationPeer::OnReceivedRedirect(
  49     const GURL& new_url,
  50     const webkit_glue::ResourceResponseInfo& info,
  51     bool* has_new_first_party_for_cookies,
  52     GURL* new_first_party_for_cookies) {
  53   NOTREACHED();
  54   return false;
  55 }
  56
  57 void ExtensionLocalizationPeer::OnReceivedResponse(
  58     const webkit_glue::ResourceResponseInfo& info) {
  59   response_info_ = info;
  60 }
  61
  62 void ExtensionLocalizationPeer::OnReceivedData(const char* data,
  63                                                int data_length,
  64                                                int encoded_data_length) {
  65   data_.append(data, data_length);
  66 }
  67
  68 void ExtensionLocalizationPeer::OnCompletedRequest(
  69     int error_code,
  70     bool was_ignored_by_handler,
  71     const std::string& security_info,
  72     const base::TimeTicks& completion_time) {
  73   // Make sure we delete ourselves at the end of this call.
  74   scoped_ptr<ExtensionLocalizationPeer> this_deleter(this);
  75
  76   // Give sub-classes a chance at altering the data.
  77   if (error_code != net::OK) {
  78     // We failed to load the resource.
  79     original_peer_->OnReceivedResponse(response_info_);
  80     original_peer_->OnCompletedRequest(net::ERR_ABORTED, false, security_info,
  81                                        completion_time);
  82     return;
  83   }
  84
  85   ReplaceMessages();
  86
  87   original_peer_->OnReceivedResponse(response_info_);
  88   if (!data_.empty())
  89     original_peer_->OnReceivedData(data_.data(),
  90                                    static_cast<int>(data_.size()),
  91                                    -1);
  92   original_peer_->OnCompletedRequest(error_code, was_ignored_by_handler,
  93                                      security_info, completion_time);
  94 }
  95
  96 void ExtensionLocalizationPeer::ReplaceMessages() {
  97   if (!message_sender_ || data_.empty())
  98     return;
  99
 100   if (!request_url_.is_valid())
 101     return;
 102
 103   std::string extension_id = request_url_.host();
 104   extensions::L10nMessagesMap* l10n_messages =
 105       extensions::GetL10nMessagesMap(extension_id);
 106   if (!l10n_messages) {
 107     extensions::L10nMessagesMap messages;
 108     message_sender_->Send(new ExtensionHostMsg_GetMessageBundle(
 109         extension_id, &messages));
 110
 111     // Save messages we got, so we don't have to ask again.
 112     // Messages map is never empty, it contains at least @@extension_id value.
 113     extensions::ExtensionToL10nMessagesMap& l10n_messages_map =
 114         *extensions::GetExtensionToL10nMessagesMap();
 115     l10n_messages_map[extension_id] = messages;
 116
 117     l10n_messages = extensions::GetL10nMessagesMap(extension_id);
 118   }
 119
 120   std::string error;
 121   if (extensions::MessageBundle::ReplaceMessagesWithExternalDictionary(
 122           *l10n_messages, &data_, &error)) {
 123     data_.resize(data_.size());
 124   }
 125 }