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 #ifndef CHROME_BROWSER_NET_CHROME_HTTP_USER_AGENT_SETTINGS_H_ 6 #define CHROME_BROWSER_NET_CHROME_HTTP_USER_AGENT_SETTINGS_H_ 7 8 #include <string> 9 10 #include "base/basictypes.h" 11 #include "base/compiler_specific.h" 12 #include "base/prefs/pref_member.h" 13 #include "net/url_request/http_user_agent_settings.h" 14 15 class PrefService; 16 17 // An implementation of |HttpUserAgentSettings| that provides HTTP header 18 // Accept-Language value that tracks Pref settings. 19 class ChromeHttpUserAgentSettings : public net::HttpUserAgentSettings { 20 public: 21 // Must be called on the UI thread. 22 explicit ChromeHttpUserAgentSettings(PrefService* prefs); 23 // Must be called on the IO thread. 24 virtual ~ChromeHttpUserAgentSettings(); 25 26 void CleanupOnUIThread(); 27 28 // net::HttpUserAgentSettings implementation 29 virtual std::string GetAcceptLanguage() const OVERRIDE; 30 virtual std::string GetUserAgent() const OVERRIDE; 31 32 private: 33 StringPrefMember pref_accept_language_; 34 35 // Avoid re-processing by caching the last value from the preferences and the 36 // last result of processing via net::HttpUtil::GenerateAccept*Header(). 37 mutable std::string last_pref_accept_language_; 38 mutable std::string last_http_accept_language_; 39 40 DISALLOW_COPY_AND_ASSIGN(ChromeHttpUserAgentSettings); 41 }; 42 43 #endif // CHROME_BROWSER_NET_CHROME_HTTP_USER_AGENT_SETTINGS_H_ 44 45
