chrome/browser/net/chrome_http_user_agent_settings.cc

   1 // Copyright (c) 2012 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/net/chrome_http_user_agent_settings.h"
   6
   7 #include "base/prefs/pref_service.h"
   8 #include "chrome/common/chrome_content_client.h"
   9 #include "chrome/common/pref_names.h"
  10 #include "content/public/browser/browser_thread.h"
  11 #include "net/http/http_util.h"
  12
  13 ChromeHttpUserAgentSettings::ChromeHttpUserAgentSettings(PrefService* prefs) {
  14   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  15   pref_accept_language_.Init(prefs::kAcceptLanguages, prefs);
  16   last_pref_accept_language_ = *pref_accept_language_;
  17   last_http_accept_language_ =
  18       net::HttpUtil::GenerateAcceptLanguageHeader(last_pref_accept_language_);
  19   pref_accept_language_.MoveToThread(
  20       content::BrowserThread::GetMessageLoopProxyForThread(
  21           content::BrowserThread::IO));
  22 }
  23
  24 ChromeHttpUserAgentSettings::~ChromeHttpUserAgentSettings() {
  25   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
  26 }
  27
  28 void ChromeHttpUserAgentSettings::CleanupOnUIThread() {
  29   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  30   pref_accept_language_.Destroy();
  31 }
  32
  33 std::string ChromeHttpUserAgentSettings::GetAcceptLanguage() const {
  34   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
  35   std::string new_pref_accept_language = *pref_accept_language_;
  36   if (new_pref_accept_language != last_pref_accept_language_) {
  37     last_http_accept_language_ =
  38         net::HttpUtil::GenerateAcceptLanguageHeader(new_pref_accept_language);
  39     last_pref_accept_language_ = new_pref_accept_language;
  40   }
  41   return last_http_accept_language_;
  42 }
  43
  44 std::string ChromeHttpUserAgentSettings::GetUserAgent() const {
  45   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
  46   return ::GetUserAgent();
  47 }
  48