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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_NET_CHROME_HTTP_USER_AGENT_SETTINGS_H_
#define CHROME_BROWSER_NET_CHROME_HTTP_USER_AGENT_SETTINGS_H_
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/prefs/public/pref_member.h"
#include "net/url_request/http_user_agent_settings.h"
class PrefService;
// An implementation of |HttpUserAgentSettings| that provides HTTP headers
// Accept-Language and Accept-Charset values that track Pref settings and uses
// |content::GetUserAgent| to provide the HTTP User-Agent header value.
class ChromeHttpUserAgentSettings : public net::HttpUserAgentSettings {
public:
// Must be called on the UI thread.
explicit ChromeHttpUserAgentSettings(PrefService* prefs);
// Must be called on the IO thread.
virtual ~ChromeHttpUserAgentSettings();
void CleanupOnUIThread();
// net::HttpUserAgentSettings implementation
virtual std::string GetAcceptLanguage() const OVERRIDE;
virtual std::string GetAcceptCharset() const OVERRIDE;
virtual std::string GetUserAgent(const GURL& url) const OVERRIDE;
private:
StringPrefMember pref_accept_language_;
StringPrefMember pref_accept_charset_;
// Avoid re-processing by caching the last value from the preferences and the
// last result of processing via net::HttpUtil::GenerateAccept*Header().
mutable std::string last_pref_accept_language_;
mutable std::string last_http_accept_language_;
mutable std::string last_pref_accept_charset_;
mutable std::string last_http_accept_charset_;
DISALLOW_COPY_AND_ASSIGN(ChromeHttpUserAgentSettings);
};
#endif // CHROME_BROWSER_NET_CHROME_HTTP_USER_AGENT_SETTINGS_H_
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