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// Copyright (c) 2006-2008 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 NET_HTTP_HTTP_TRANSACTION_WINHTTP_H__
#define NET_HTTP_HTTP_TRANSACTION_WINHTTP_H__
#include <windows.h>
#include <winhttp.h>
#include <string>
#include "base/ref_counted.h"
#include "net/base/completion_callback.h"
#include "net/http/http_response_info.h"
#include "net/http/http_transaction.h"
#include "net/http/http_transaction_factory.h"
#include "net/proxy/proxy_service.h"
namespace net {
class UploadDataStream;
class HttpTransactionWinHttp : public HttpTransaction {
class Session; // Represents a WinHttp session handle.
class SessionCallback;
public:
// Instantiate this class, and use it to create HttpTransaction objects.
class Factory : public HttpTransactionFactory {
public:
explicit Factory(ProxyService* proxy_service)
: session_(NULL), proxy_service_(proxy_service), is_suspended_(false) {
DCHECK(proxy_service);
}
~Factory();
virtual HttpTransaction* CreateTransaction();
virtual HttpCache* GetCache();
virtual void Suspend(bool suspend);
private:
Session* session_;
scoped_refptr<ProxyService> proxy_service_;
bool is_suspended_;
DISALLOW_EVIL_CONSTRUCTORS(Factory);
};
virtual ~HttpTransactionWinHttp();
// HttpTransaction methods:
virtual int Start(const HttpRequestInfo*, CompletionCallback*);
virtual int RestartIgnoringLastError(CompletionCallback*);
virtual int RestartWithAuth(const std::wstring&,
const std::wstring&,
CompletionCallback*);
virtual int Read(char*, int, CompletionCallback*);
virtual const HttpResponseInfo* GetResponseInfo() const;
virtual LoadState GetLoadState() const;
virtual uint64 GetUploadProgress() const;
static void CALLBACK StatusCallback(HINTERNET handle,
DWORD_PTR context,
DWORD status,
LPVOID status_info,
DWORD status_info_len);
// Called via the message loop in response to a WinHttp status callback.
void HandleStatusCallback(DWORD status,
DWORD_PTR result,
DWORD error,
DWORD secure_failure);
private:
friend class Factory;
// Methods ------------------------------------------------------------------
HttpTransactionWinHttp(Session* session, const ProxyInfo* info);
void DoCallback(int rv);
int ResolveProxy();
bool OpenRequest();
int SendRequest();
bool ReopenRequest();
int Restart(CompletionCallback* callback);
int RestartInternal();
int DidResolveProxy();
int DidReceiveError(DWORD error, DWORD secure_failure);
int DidSendRequest();
int DidWriteData(DWORD num_bytes);
int DidReadData(DWORD num_bytes);
void LogTransactionMetrics() const;
int DidReceiveHeaders();
int PopulateAuthChallenge();
void ApplyAuth();
std::string GetRequestHeaders() const;
X509Certificate* GetServerCertificate() const;
int GetSecurityBits() const;
void PopulateSSLInfo(DWORD secure_failure);
void OnProxyInfoAvailable(int result);
// Variables ----------------------------------------------------------------
Session* session_;
const HttpRequestInfo* request_;
// A copy of request_->load_flags that we can modify in
// RestartIgnoringLastError.
int load_flags_;
// Optional auth data for proxy and origin server.
scoped_refptr<AuthData> proxy_auth_;
scoped_refptr<AuthData> server_auth_;
// The key for looking up the auth data in the auth cache, consisting
// of the scheme, host, and port of the request URL and the realm in
// the auth challenge.
std::string proxy_auth_cache_key_;
std::string server_auth_cache_key_;
// The peer of the connection. For a direct connection, this is the
// destination server. If we use a proxy, this is the proxy.
std::string connect_peer_;
// The last error from SendRequest that occurred. Used by
// RestartIgnoringLastError to adjust load_flags_ to ignore this error.
DWORD last_error_;
// This value is non-negative when we are streaming a response over a
// non-keepalive connection. We decrement this value as we receive data to
// allow us to discover end-of-file. This is used to workaround a bug in
// WinHttp (see bug 1063336).
int64 content_length_remaining_;
ProxyInfo proxy_info_;
ProxyService::PacRequest* pac_request_;
CompletionCallbackImpl<HttpTransactionWinHttp> proxy_callback_;
HttpResponseInfo response_;
CompletionCallback* callback_;
HINTERNET connect_handle_;
HINTERNET request_handle_;
scoped_refptr<SessionCallback> session_callback_;
scoped_ptr<UploadDataStream> upload_stream_;
uint64 upload_progress_;
// True if the URL's scheme is https.
bool is_https_;
// True if the SSL server doesn't support TLS but also cannot correctly
// negotiate with a TLS-enabled client to use SSL 3.0. The workaround is
// for the client to downgrade to SSL 3.0 and retry the SSL handshake.
bool is_tls_intolerant_;
// True if revocation checking of the SSL server certificate is enabled.
bool rev_checking_enabled_;
// A flag to indicate whether or not we already have proxy information.
// If false, we will attempt to resolve proxy information from the proxy
// service. This flag is set to true if proxy information is supplied by
// a client.
bool have_proxy_info_;
// If WinHTTP is still using our caller's data (upload data or read buffer),
// we need to wait for the HANDLE_CLOSING status notification after we close
// the request handle.
//
// There are only five WinHTTP functions that work asynchronously (listed in
// the order in which they're called):
// WinHttpSendRequest, WinHttpWriteData, WinHttpReceiveResponse,
// WinHttpQueryDataAvailable, WinHttpReadData.
// WinHTTP is using our caller's data during the two time intervals:
// - From the first WinHttpWriteData call to the completion of the last
// WinHttpWriteData call. (We may call WinHttpWriteData multiple times.)
// - From the WinHttpReadData call to its completion.
// We set need_to_wait_for_handle_closing_ to true at the beginning of these
// time intervals and set it to false at the end. We're not sandwiching the
// intervals as tightly as possible. (To do that, we'd need to give WinHTTP
// worker threads access to the need_to_wait_for_handle_closing_ flag and
// worry about thread synchronization issues.)
bool need_to_wait_for_handle_closing_;
// True if we have called WinHttpRequestThrottle::SubmitRequest but haven't
// called WinHttpRequestThrottle::NotifyRequestDone.
bool request_submitted_;
// True if we have used the username/password embedded in the URL.
bool used_embedded_credentials_;
DISALLOW_EVIL_CONSTRUCTORS(HttpTransactionWinHttp);
};
} // namespace net
#endif // NET_HTTP_HTTP_TRANSACTION_WINHTTP_H__
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