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.
5 #ifndef CHROME_BROWSER_NET_CHROME_HTTP_USER_AGENT_SETTINGS_H_
6 #define CHROME_BROWSER_NET_CHROME_HTTP_USER_AGENT_SETTINGS_H_
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"
17 // An implementation of |HttpUserAgentSettings| that provides HTTP header
18 // Accept-Language value that tracks Pref settings and uses
19 // |content::GetUserAgent| to provide the HTTP User-Agent header value.
20 class ChromeHttpUserAgentSettings : public net::HttpUserAgentSettings {
22 // Must be called on the UI thread.
23 explicit ChromeHttpUserAgentSettings(PrefService* prefs);
24 // Must be called on the IO thread.
25 virtual ~ChromeHttpUserAgentSettings();
27 void CleanupOnUIThread();
29 // net::HttpUserAgentSettings implementation
30 virtual std::string GetAcceptLanguage() const OVERRIDE;
31 virtual std::string GetUserAgent(const GURL& url) const OVERRIDE;
34 StringPrefMember pref_accept_language_;
36 // Avoid re-processing by caching the last value from the preferences and the
37 // last result of processing via net::HttpUtil::GenerateAccept*Header().
38 mutable std::string last_pref_accept_language_;
39 mutable std::string last_http_accept_language_;
41 DISALLOW_COPY_AND_ASSIGN(ChromeHttpUserAgentSettings);
44 #endif // CHROME_BROWSER_NET_CHROME_HTTP_USER_AGENT_SETTINGS_H_