mirror of
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211 lines
9.2 KiB
C++
211 lines
9.2 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_HTTP_HTTP_TRANSACTION_H_
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#define NET_HTTP_HTTP_TRANSACTION_H_
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#include <stdint.h>
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#include "net/base/completion_callback.h"
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#include "net/base/load_states.h"
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#include "net/base/net_error_details.h"
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#include "net/base/net_export.h"
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#include "net/base/request_priority.h"
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#include "net/base/upload_progress.h"
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#include "net/http/http_raw_request_headers.h"
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#include "net/http/http_response_headers.h"
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#include "net/socket/connection_attempts.h"
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#include "net/websockets/websocket_handshake_stream_base.h"
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namespace net {
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class AuthCredentials;
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class HttpRequestHeaders;
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struct HttpRequestInfo;
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class HttpResponseInfo;
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class IOBuffer;
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struct LoadTimingInfo;
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class NetLogWithSource;
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class ProxyInfo;
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class QuicServerInfo;
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class SSLPrivateKey;
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class X509Certificate;
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// Represents a single HTTP transaction (i.e., a single request/response pair).
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// HTTP redirects are not followed and authentication challenges are not
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// answered. Cookies are assumed to be managed by the caller.
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class NET_EXPORT_PRIVATE HttpTransaction {
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public:
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// If |*defer| is set to true, the transaction will wait until
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// ResumeNetworkStart is called before establishing a connection.
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typedef base::Callback<void(bool* defer)> BeforeNetworkStartCallback;
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// Provides an opportunity to add additional request headers. Called after
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// a connection is established and before the request headers are sent.
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// |proxy_info| contains information about any proxies being used, and
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// additional headers may be added to |request_headers|.
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typedef base::Callback<void(const ProxyInfo& proxy_info,
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HttpRequestHeaders* request_headers)>
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BeforeHeadersSentCallback;
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// Stops any pending IO and destroys the transaction object.
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virtual ~HttpTransaction() {}
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// Starts the HTTP transaction (i.e., sends the HTTP request).
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//
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// TODO(crbug.com/723786) The consumer should ensure that request_info points
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// to a valid value till final response headers are received; after that
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// point, the HttpTransaction will not access |*request_info| and it may be
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// deleted.
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//
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// Returns OK if the transaction could be started synchronously, which means
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// that the request was served from the cache. ERR_IO_PENDING is returned to
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// indicate that the CompletionCallback will be notified once response info is
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// available or if an IO error occurs. Any other return value indicates that
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// the transaction could not be started.
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//
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// Regardless of the return value, the caller is expected to keep the
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// request_info object alive until Destroy is called on the transaction.
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//
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// NOTE: The transaction is not responsible for deleting the callback object.
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//
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// Profiling information for the request is saved to |net_log| if non-NULL.
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virtual int Start(const HttpRequestInfo* request_info,
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const CompletionCallback& callback,
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const NetLogWithSource& net_log) = 0;
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// Restarts the HTTP transaction, ignoring the last error. This call can
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// only be made after a call to Start (or RestartIgnoringLastError) failed.
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// Once Read has been called, this method cannot be called. This method is
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// used, for example, to continue past various SSL related errors.
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//
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// Not all errors can be ignored using this method. See error code
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// descriptions for details about errors that can be ignored.
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//
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// NOTE: The transaction is not responsible for deleting the callback object.
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//
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virtual int RestartIgnoringLastError(const CompletionCallback& callback) = 0;
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// Restarts the HTTP transaction with a client certificate.
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virtual int RestartWithCertificate(
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scoped_refptr<X509Certificate> client_cert,
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scoped_refptr<SSLPrivateKey> client_private_key,
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const CompletionCallback& callback) = 0;
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// Restarts the HTTP transaction with authentication credentials.
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virtual int RestartWithAuth(const AuthCredentials& credentials,
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const CompletionCallback& callback) = 0;
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// Returns true if auth is ready to be continued. Callers should check
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// this value anytime Start() completes: if it is true, the transaction
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// can be resumed with RestartWithAuth(L"", L"", callback) to resume
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// the automatic auth exchange. This notification gives the caller a
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// chance to process the response headers from all of the intermediate
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// restarts needed for authentication.
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virtual bool IsReadyToRestartForAuth() = 0;
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// Once response info is available for the transaction, response data may be
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// read by calling this method.
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//
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// Response data is copied into the given buffer and the number of bytes
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// copied is returned. ERR_IO_PENDING is returned if response data is not
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// yet available. The CompletionCallback is notified when the data copy
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// completes, and it is passed the number of bytes that were successfully
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// copied. Or, if a read error occurs, the CompletionCallback is notified of
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// the error. Any other negative return value indicates that the transaction
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// could not be read.
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//
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// NOTE: The transaction is not responsible for deleting the callback object.
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// If the operation is not completed immediately, the transaction must acquire
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// a reference to the provided buffer.
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//
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virtual int Read(IOBuffer* buf, int buf_len,
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const CompletionCallback& callback) = 0;
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// Stops further caching of this request by the HTTP cache, if there is any.
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// Note that this is merely a hint to the transaction which it may choose to
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// ignore.
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virtual void StopCaching() = 0;
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// Gets the full request headers sent to the server. This is guaranteed to
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// work only if Start returns success and the underlying transaction supports
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// it. (Right now, this is only network transactions, not cache ones.)
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//
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// Returns true and overwrites headers if it can get the request headers;
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// otherwise, returns false and does not modify headers.
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virtual bool GetFullRequestHeaders(HttpRequestHeaders* headers) const = 0;
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// Get the number of bytes received from network.
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virtual int64_t GetTotalReceivedBytes() const = 0;
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// Get the number of bytes sent over the network.
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virtual int64_t GetTotalSentBytes() const = 0;
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// Called to tell the transaction that we have successfully reached the end
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// of the stream. This is equivalent to performing an extra Read() at the end
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// that should return 0 bytes. This method should not be called if the
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// transaction is busy processing a previous operation (like a pending Read).
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//
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// DoneReading may also be called before the first Read() to notify that the
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// entire response body is to be ignored (e.g., in a redirect).
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virtual void DoneReading() = 0;
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// Returns the response info for this transaction. Must not be called until
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// |Start| completes.
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virtual const HttpResponseInfo* GetResponseInfo() const = 0;
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// Returns the load state for this transaction.
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virtual LoadState GetLoadState() const = 0;
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// SetQuicServerInfo sets a object which reads and writes public information
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// about a QUIC server.
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virtual void SetQuicServerInfo(QuicServerInfo* quic_server_info) = 0;
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// Populates all of load timing, except for request start times and receive
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// headers time.
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// |load_timing_info| must have all null times when called. Returns false and
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// does not modify |load_timing_info| if there's no timing information to
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// provide.
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virtual bool GetLoadTimingInfo(LoadTimingInfo* load_timing_info) const = 0;
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// Gets the remote endpoint of the socket that the transaction's underlying
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// stream is using or did use, if any. Returns true and fills in |endpoint|
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// if it is available; returns false and leaves |endpoint| unchanged if it is
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// unavailable.
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virtual bool GetRemoteEndpoint(IPEndPoint* endpoint) const = 0;
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// Populates network error details for this transaction.
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virtual void PopulateNetErrorDetails(NetErrorDetails* details) const = 0;
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// Called when the priority of the parent job changes.
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virtual void SetPriority(RequestPriority priority) = 0;
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// Set the WebSocketHandshakeStreamBase::CreateHelper to be used for the
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// request. Only relevant to WebSocket transactions. Must be called before
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// Start(). Ownership of |create_helper| remains with the caller.
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virtual void SetWebSocketHandshakeStreamCreateHelper(
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WebSocketHandshakeStreamBase::CreateHelper* create_helper) = 0;
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// Sets the callback to receive notification just before network use.
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virtual void SetBeforeNetworkStartCallback(
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const BeforeNetworkStartCallback& callback) = 0;
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// Sets the callback to receive notification just before request headers
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// are to be sent.
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virtual void SetBeforeHeadersSentCallback(
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const BeforeHeadersSentCallback& callback) = 0;
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virtual void SetRequestHeadersCallback(RequestHeadersCallback callback) = 0;
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virtual void SetResponseHeadersCallback(ResponseHeadersCallback callback) = 0;
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// Resumes the transaction after being deferred.
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virtual int ResumeNetworkStart() = 0;
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virtual void GetConnectionAttempts(ConnectionAttempts* out) const = 0;
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};
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} // namespace net
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#endif // NET_HTTP_HTTP_TRANSACTION_H_
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