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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_H_
#define NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_H_
#include <stdint.h>
#include <memory>
#include <string>
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "net/base/completion_once_callback.h"
#include "net/base/completion_repeating_callback.h"
#include "net/base/host_port_pair.h"
#include "net/base/net_export.h"
#include "net/base/proxy_chain.h"
#include "net/http/http_auth_controller.h"
#include "net/http/http_request_headers.h"
#include "net/http/http_request_info.h"
#include "net/http/http_response_info.h"
#include "net/http/proxy_client_socket.h"
#include "net/log/net_log_with_source.h"
#include "net/socket/ssl_client_socket.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
namespace net {
class GrowableIOBuffer;
class HttpStreamParser;
class IOBuffer;
class ProxyDelegate;
class StreamSocket;
// Tunnels a stream socket over an HTTP/1.1 connection.
//
// This class handles only _tunneled_ proxy connections, using `CONNECT`.
// Un-tunneled proxy requests are handled in the HTTP stream layer,
// specifically in `HttpBasicStream`.
class NET_EXPORT_PRIVATE HttpProxyClientSocket : public ProxyClientSocket {
public:
// Takes ownership of |socket|, which should already be connected by the time
// Connect() is called. |socket| is assumed to be a fresh socket.
HttpProxyClientSocket(std::unique_ptr<StreamSocket> socket,
const std::string& user_agent,
const HostPortPair& endpoint,
const ProxyChain& proxy_chain,
size_t proxy_chain_index,
scoped_refptr<HttpAuthController> http_auth_controller,
ProxyDelegate* proxy_delegate,
const NetworkTrafficAnnotationTag& traffic_annotation);
HttpProxyClientSocket(const HttpProxyClientSocket&) = delete;
HttpProxyClientSocket& operator=(const HttpProxyClientSocket&) = delete;
// On destruction Disconnect() is called.
~HttpProxyClientSocket() override;
// ProxyClientSocket implementation.
const HttpResponseInfo* GetConnectResponseInfo() const override;
int RestartWithAuth(CompletionOnceCallback callback) override;
const scoped_refptr<HttpAuthController>& GetAuthController() const override;
// StreamSocket implementation.
int Connect(CompletionOnceCallback callback) override;
void Disconnect() override;
bool IsConnected() const override;
bool IsConnectedAndIdle() const override;
const NetLogWithSource& NetLog() const override;
bool WasEverUsed() const override;
NextProto GetNegotiatedProtocol() const override;
bool GetSSLInfo(SSLInfo* ssl_info) override;
int64_t GetTotalReceivedBytes() const override;
void ApplySocketTag(const SocketTag& tag) override;
// Socket implementation.
int Read(IOBuffer* buf,
int buf_len,
CompletionOnceCallback callback) override;
int ReadIfReady(IOBuffer* buf,
int buf_len,
CompletionOnceCallback callback) override;
int CancelReadIfReady() override;
int Write(IOBuffer* buf,
int buf_len,
CompletionOnceCallback callback,
const NetworkTrafficAnnotationTag& traffic_annotation) override;
int SetReceiveBufferSize(int32_t size) override;
int SetSendBufferSize(int32_t size) override;
int GetPeerAddress(IPEndPoint* address) const override;
int GetLocalAddress(IPEndPoint* address) const override;
private:
enum State {
STATE_NONE,
STATE_GENERATE_AUTH_TOKEN,
STATE_GENERATE_AUTH_TOKEN_COMPLETE,
STATE_SEND_REQUEST,
STATE_SEND_REQUEST_COMPLETE,
STATE_READ_HEADERS,
STATE_READ_HEADERS_COMPLETE,
STATE_DRAIN_BODY,
STATE_DRAIN_BODY_COMPLETE,
STATE_DONE,
};
// The size in bytes of the buffer we use to drain the response body that
// we want to throw away. The response body is typically a small error
// page just a few hundred bytes long.
static const int kDrainBodyBufferSize = 1024;
int PrepareForAuthRestart();
int DidDrainBodyForAuthRestart();
void DoCallback(int result);
void OnIOComplete(int result);
int DoLoop(int last_io_result);
int DoGenerateAuthToken();
int DoGenerateAuthTokenComplete(int result);
int DoSendRequest();
int DoSendRequestComplete(int result);
int DoReadHeaders();
int DoReadHeadersComplete(int result);
int DoDrainBody();
int DoDrainBodyComplete(int result);
// Returns whether |next_state_| is STATE_DONE.
bool CheckDone();
CompletionRepeatingCallback io_callback_;
State next_state_ = STATE_NONE;
// Stores the callback provided by the caller of async operations.
CompletionOnceCallback user_callback_;
// Bogus request info. Only its url and method fields are used.
HttpRequestInfo request_;
const std::string user_agent_;
HttpResponseInfo response_;
scoped_refptr<GrowableIOBuffer> parser_buf_;
scoped_refptr<IOBuffer> drain_buf_;
std::unique_ptr<StreamSocket> socket_;
std::unique_ptr<HttpStreamParser> http_stream_parser_;
// Whether or not |socket_| has been previously used. Once auth credentials
// are sent, set to true.
bool is_reused_ = false;
// The hostname and port of the endpoint. This is not necessarily the one
// specified by the URL, due to Alternate-Protocol or fixed testing ports.
const HostPortPair endpoint_;
scoped_refptr<HttpAuthController> auth_;
std::string request_line_;
HttpRequestHeaders request_headers_;
const ProxyChain proxy_chain_;
const size_t proxy_chain_index_;
// This delegate must outlive this proxy client socket.
raw_ptr<ProxyDelegate> proxy_delegate_;
// Network traffic annotation for handshaking and setup.
const NetworkTrafficAnnotationTag traffic_annotation_;
const NetLogWithSource net_log_;
};
} // namespace net
#endif // NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_H_
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