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// Copyright (c) 2006-2010 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.
// A Preconnect instance maintains state while a TCP/IP connection is made, and
// and then released into the pool of available connections for future use.
#ifndef CHROME_BROWSER_NET_PRECONNECT_H_
#define CHROME_BROWSER_NET_PRECONNECT_H_
#pragma once
#include "base/scoped_ptr.h"
#include "chrome/browser/net/url_info.h"
#include "net/base/completion_callback.h"
#include "net/base/net_log.h"
#include "net/http/http_request_info.h"
#include "net/http/stream_factory.h"
namespace net {
class ProxyInfo;
struct SSLConfig;
} // namespace net
namespace chrome_browser_net {
class Preconnect {
public:
// Try to preconnect. Typically motivated by OMNIBOX to reach search service.
// |count| may be used to request more than one connection be established in
// parallel.
static void PreconnectOnUIThread(const GURL& url,
UrlInfo::ResolutionMotivation motivation,
int count);
// Try to preconnect. Typically used by predictor when a subresource probably
// needs a connection. |count| may be used to request more than one connection
// be established in parallel.
static void PreconnectOnIOThread(const GURL& url,
UrlInfo::ResolutionMotivation motivation,
int count);
private:
explicit Preconnect(UrlInfo::ResolutionMotivation motivation);
virtual ~Preconnect();
void OnPreconnectComplete(int error_code);
// Request actual connection, via interface that tags request as needed for
// preconnect only (so that they can be merged with connections needed for
// navigations).
void Connect(const GURL& url, int count);
// Generally either LEARNED_REFERAL_MOTIVATED, OMNIBOX_MOTIVATED or
// EARLY_LOAD_MOTIVATED to indicate why we were trying to do a preconnection.
const UrlInfo::ResolutionMotivation motivation_;
// HttpRequestInfo used for connecting.
scoped_ptr<net::HttpRequestInfo> request_info_;
// SSLConfig used for connecting.
scoped_ptr<net::SSLConfig> ssl_config_;
// ProxyInfo used for connecting.
scoped_ptr<net::ProxyInfo> proxy_info_;
// A net log to use for this preconnect.
net::BoundNetLog net_log_;
// Our preconnect.
scoped_ptr<net::StreamRequest> stream_request_;
net::CompletionCallbackImpl<Preconnect> io_callback_;
DISALLOW_COPY_AND_ASSIGN(Preconnect);
};
} // namespace chrome_browser_net
#endif // CHROME_BROWSER_NET_PRECONNECT_H_
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