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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_NETWORK_TRANSACTION_H_
#define NET_HTTP_HTTP_NETWORK_TRANSACTION_H_
#include <string>
#include "base/ref_counted.h"
#include "net/base/address_list.h"
#include "net/base/client_socket_handle.h"
#include "net/base/host_resolver.h"
#include "net/http/http_response_info.h"
#include "net/http/http_transaction.h"
#include "net/proxy/proxy_service.h"
namespace net {
class ClientSocketFactory;
class HostResolver;
class HttpChunkedDecoder;
class HttpNetworkSession;
class UploadDataStream;
class HttpNetworkTransaction : public HttpTransaction {
public:
HttpNetworkTransaction(HttpNetworkSession* session,
ClientSocketFactory* socket_factory);
// HttpTransaction methods:
virtual void Destroy();
virtual int Start(const HttpRequestInfo* request_info,
CompletionCallback* callback);
virtual int RestartIgnoringLastError(CompletionCallback* callback);
virtual int RestartWithAuth(const std::wstring& username,
const std::wstring& password,
CompletionCallback* callback);
virtual int Read(char* buf, int buf_len, CompletionCallback* callback);
virtual const HttpResponseInfo* GetResponseInfo() const;
virtual LoadState GetLoadState() const;
virtual uint64 GetUploadProgress() const;
private:
~HttpNetworkTransaction();
void BuildRequestHeaders();
void BuildTunnelRequest();
void DoCallback(int result);
void OnIOComplete(int result);
// Runs the state transition loop.
int DoLoop(int result);
// Each of these methods corresponds to a State value. Those with an input
// argument receive the result from the previous state. If a method returns
// ERR_IO_PENDING, then the result from OnIOComplete will be passed to the
// next state method as the result arg.
int DoResolveProxy();
int DoResolveProxyComplete(int result);
int DoInitConnection();
int DoInitConnectionComplete(int result);
int DoResolveHost();
int DoResolveHostComplete(int result);
int DoConnect();
int DoConnectComplete(int result);
int DoSSLConnectOverTunnel();
int DoSSLConnectOverTunnelComplete(int result);
int DoWriteHeaders();
int DoWriteHeadersComplete(int result);
int DoWriteBody();
int DoWriteBodyComplete(int result);
int DoReadHeaders();
int DoReadHeadersComplete(int result);
int DoReadBody();
int DoReadBodyComplete(int result);
// Called when header_buf_ contains the complete response headers.
int DidReadResponseHeaders();
// Called to handle a certificate error. Returns OK if the error should be
// ignored. Otherwise, stores the certificate in response_.ssl_info and
// returns the same error code.
int HandleCertificateError(int error);
// Called to possibly recover from the given error. Sets next_state_ and
// returns OK if recovering from the error. Otherwise, the same error code
// is returned.
int HandleIOError(int error);
// Return true if based on the bytes read so far, the start of the
// status line is known. This is used to distingish between HTTP/0.9
// responses (which have no status line).
bool has_found_status_line_start() const {
return header_buf_http_offset_ != -1;
}
CompletionCallbackImpl<HttpNetworkTransaction> io_callback_;
CompletionCallback* user_callback_;
scoped_refptr<HttpNetworkSession> session_;
const HttpRequestInfo* request_;
HttpResponseInfo response_;
ProxyService::PacRequest* pac_request_;
ProxyInfo proxy_info_;
HostResolver resolver_;
AddressList addresses_;
ClientSocketFactory* socket_factory_;
ClientSocketHandle connection_;
bool reused_socket_;
bool using_ssl_; // True if handling a HTTPS request
bool using_proxy_; // True if using a proxy for HTTP (not HTTPS)
bool using_tunnel_; // True if using a tunnel for HTTPS
// True while establishing a tunnel. This allows the HTTP CONNECT
// request/response to reuse the STATE_WRITE_HEADERS,
// STATE_WRITE_HEADERS_COMPLETE, STATE_READ_HEADERS, and
// STATE_READ_HEADERS_COMPLETE states and allows us to tell them apart from
// the real request/response of the transaction.
bool establishing_tunnel_;
std::string request_headers_;
size_t request_headers_bytes_sent_;
scoped_ptr<UploadDataStream> request_body_stream_;
// The read buffer may be larger than it is full. The 'capacity' indicates
// the allocation size of the buffer, and the 'len' indicates how much data
// is in the buffer already. The 'body offset' indicates the offset of the
// start of the response body within the read buffer.
scoped_ptr_malloc<char> header_buf_;
int header_buf_capacity_;
int header_buf_len_;
int header_buf_body_offset_;
enum { kHeaderBufInitialSize = 4096 };
// The position where status line starts; -1 if not found yet.
int header_buf_http_offset_;
// Indicates the content length remaining to read. If this value is less
// than zero (and chunked_decoder_ is null), then we read until the server
// closes the connection.
int64 content_length_;
// Keeps track of the number of response body bytes read so far.
int64 content_read_;
scoped_ptr<HttpChunkedDecoder> chunked_decoder_;
// User buffer and length passed to the Read method.
char* read_buf_;
int read_buf_len_;
enum State {
STATE_RESOLVE_PROXY,
STATE_RESOLVE_PROXY_COMPLETE,
STATE_INIT_CONNECTION,
STATE_INIT_CONNECTION_COMPLETE,
STATE_RESOLVE_HOST,
STATE_RESOLVE_HOST_COMPLETE,
STATE_CONNECT,
STATE_CONNECT_COMPLETE,
STATE_SSL_CONNECT_OVER_TUNNEL,
STATE_SSL_CONNECT_OVER_TUNNEL_COMPLETE,
STATE_WRITE_HEADERS,
STATE_WRITE_HEADERS_COMPLETE,
STATE_WRITE_BODY,
STATE_WRITE_BODY_COMPLETE,
STATE_READ_HEADERS,
STATE_READ_HEADERS_COMPLETE,
STATE_READ_BODY,
STATE_READ_BODY_COMPLETE,
STATE_NONE
};
State next_state_;
};
} // namespace net
#endif // NET_HTTP_HTTP_NETWORK_TRANSACTION_H_
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