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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// This is the global interface for the dns prefetch services. It centralizes
// initialization, along with all the callbacks etc. to connect to the browser
// process. This allows the more standard DNS prefetching services, such as
// provided by DnsMaster to be left as more generally usable code, and possibly
// be shared across multiple client projects.
#ifndef CHROME_BROWSER_NET_DNS_GLOBAL_H__
#define CHROME_BROWSER_NET_DNS_GLOBAL_H__
#include "chrome/browser/net/dns_master.h"
#include <string>
class PrefService;
namespace chrome_browser_net {
// Functions to initialize our global state so that PrefetchDns() can be called.
void InitDnsPrefetch(PrefService* user_prefs);
void ShutdownDnsPrefetch();
// Global API relating to Prefetching in browser
void EnableDnsPrefetch(bool enable);
void RegisterPrefs(PrefService* local_state);
void RegisterUserPrefs(PrefService* user_prefs);
void DnsPrefetchList(const NameList& hostnames);
void DnsPrefetchUrlString(const url_canon::UTF16String& url_string);
void DnsPrefetch(const std::string& hostname);
void DnsPrefetchGetHtmlInfo(std::string* output);
// Save the hostnames actually used at the start of this session to prefetch
// during the next startup.
void SaveHostNamesForNextStartup(PrefService* local_state);
void DnsPretchHostNamesAtStartup(PrefService* user_prefs,
PrefService* local_state);
// Helper class to handle global init and shutdown.
class DnsPrefetcherInit {
public:
explicit DnsPrefetcherInit(PrefService* user_prefs) {
InitDnsPrefetch(user_prefs);
}
~DnsPrefetcherInit() {ShutdownDnsPrefetch();}
private:
DISALLOW_EVIL_CONSTRUCTORS(DnsPrefetcherInit);
};
} // namespace chrome_browser_net
#endif // CHROME_BROWSER_NET_DNS_GLOBAL_H__
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