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// Copyright 2013 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_WEBSOCKETS_WEBSOCKET_BASIC_HANDSHAKE_STREAM_H_
#define NET_WEBSOCKETS_WEBSOCKET_BASIC_HANDSHAKE_STREAM_H_
#include <stdint.h>
#include <memory>
#include <string>
#include <vector>
#include "base/macros.h"
#include "base/optional.h"
#include "net/base/completion_once_callback.h"
#include "net/base/net_export.h"
#include "net/http/http_basic_state.h"
#include "net/websockets/websocket_handshake_stream_base.h"
#include "url/gurl.h"
namespace net {
class ClientSocketHandle;
class HttpResponseHeaders;
class HttpResponseInfo;
class HttpStreamParser;
class WebSocketEndpointLockManager;
struct WebSocketExtensionParams;
class WebSocketStreamRequestAPI;
class NET_EXPORT_PRIVATE WebSocketBasicHandshakeStream final
: public WebSocketHandshakeStreamBase {
public:
// |connect_delegate| and |failure_message| must out-live this object.
WebSocketBasicHandshakeStream(
std::unique_ptr<ClientSocketHandle> connection,
WebSocketStream::ConnectDelegate* connect_delegate,
bool using_proxy,
std::vector<std::string> requested_sub_protocols,
std::vector<std::string> requested_extensions,
WebSocketStreamRequestAPI* request,
WebSocketEndpointLockManager* websocket_endpoint_lock_manager);
~WebSocketBasicHandshakeStream() override;
// HttpStreamBase methods
int InitializeStream(const HttpRequestInfo* request_info,
bool can_send_early,
RequestPriority priority,
const NetLogWithSource& net_log,
CompletionOnceCallback callback) override;
int SendRequest(const HttpRequestHeaders& request_headers,
HttpResponseInfo* response,
CompletionOnceCallback callback) override;
int ReadResponseHeaders(CompletionOnceCallback callback) override;
int ReadResponseBody(IOBuffer* buf,
int buf_len,
CompletionOnceCallback callback) override;
void Close(bool not_reusable) override;
bool IsResponseBodyComplete() const override;
bool IsConnectionReused() const override;
void SetConnectionReused() override;
bool CanReuseConnection() const override;
int64_t GetTotalReceivedBytes() const override;
int64_t GetTotalSentBytes() const override;
bool GetAlternativeService(
AlternativeService* alternative_service) const override;
bool GetLoadTimingInfo(LoadTimingInfo* load_timing_info) const override;
void GetSSLInfo(SSLInfo* ssl_info) override;
void GetSSLCertRequestInfo(SSLCertRequestInfo* cert_request_info) override;
bool GetRemoteEndpoint(IPEndPoint* endpoint) override;
void Drain(HttpNetworkSession* session) override;
void SetPriority(RequestPriority priority) override;
void PopulateNetErrorDetails(NetErrorDetails* details) override;
HttpStream* RenewStreamForAuth() override;
const std::vector<std::string>& GetDnsAliases() const override;
// This is called from the top level once correct handshake response headers
// have been received. It creates an appropriate subclass of WebSocketStream
// depending on what extensions were negotiated. This object is unusable after
// Upgrade() has been called and should be disposed of as soon as possible.
std::unique_ptr<WebSocketStream> Upgrade() override;
base::WeakPtr<WebSocketHandshakeStreamBase> GetWeakPtr() override;
// Set the value used for the next Sec-WebSocket-Key header
// deterministically. The key is only used once, and then discarded.
// For tests only.
void SetWebSocketKeyForTesting(const std::string& key);
private:
// A wrapper for the ReadResponseHeaders callback that checks whether or not
// the connection has been accepted.
void ReadResponseHeadersCallback(CompletionOnceCallback callback, int result);
// Validates the response and sends the finished handshake event.
int ValidateResponse(int rv);
// Check that the headers are well-formed for a 101 response, and returns
// OK if they are, otherwise returns ERR_INVALID_RESPONSE.
int ValidateUpgradeResponse(const HttpResponseHeaders* headers);
void OnFailure(const std::string& message,
int net_error,
base::Optional<int> response_code);
HttpStreamParser* parser() const { return state_.parser(); }
HandshakeResult result_;
// The request URL.
GURL url_;
// HttpBasicState holds most of the handshake-related state.
HttpBasicState state_;
// Owned by another object.
// |connect_delegate| will live during the lifetime of this object.
WebSocketStream::ConnectDelegate* const connect_delegate_;
// This is stored in SendRequest() for use by ReadResponseHeaders().
HttpResponseInfo* http_response_info_;
// The key to be sent in the next Sec-WebSocket-Key header. Usually NULL (the
// key is generated on the fly).
base::Optional<std::string> handshake_challenge_for_testing_;
// The required value for the Sec-WebSocket-Accept header.
std::string handshake_challenge_response_;
// The sub-protocols we requested.
std::vector<std::string> requested_sub_protocols_;
// The extensions we requested.
std::vector<std::string> requested_extensions_;
// The sub-protocol selected by the server.
std::string sub_protocol_;
// The extension(s) selected by the server.
std::string extensions_;
// The extension parameters. The class is defined in the implementation file
// to avoid including extension-related header files here.
std::unique_ptr<WebSocketExtensionParams> extension_params_;
WebSocketStreamRequestAPI* const stream_request_;
WebSocketEndpointLockManager* const websocket_endpoint_lock_manager_;
base::WeakPtrFactory<WebSocketBasicHandshakeStream> weak_ptr_factory_{this};
DISALLOW_COPY_AND_ASSIGN(WebSocketBasicHandshakeStream);
};
} // namespace net
#endif // NET_WEBSOCKETS_WEBSOCKET_BASIC_HANDSHAKE_STREAM_H_
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