Basic HTTP pipelining support

net/http/http_stream.h

 // Copyright (c) 2011 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.
 //
 // HttpStream is an interface for reading and writing data to an HttpStream that
 // keeps the client agnostic of the actual underlying transport layer.  This
 // provides an abstraction for both a basic http stream as well as http
 // pipelining implementations.  The HttpStream subtype is expected to manage the
 // underlying transport appropriately.  For example, a non-pipelined HttpStream
 // would return the transport socket to the pool for reuse.  SPDY streams on the
 // other hand leave the transport socket management to the SpdySession.
 
 #ifndef NET_HTTP_HTTP_STREAM_H_
 #define NET_HTTP_HTTP_STREAM_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_export.h"
 
 namespace net {
 
 class BoundNetLog;
+class HttpNetworkSession;
 class HttpRequestHeaders;
 struct HttpRequestInfo;
 class HttpResponseInfo;
 class IOBuffer;
 class SSLCertRequestInfo;
 class SSLInfo;
 class UploadDataStream;
 
 class NET_EXPORT_PRIVATE HttpStream {
  public:
@@ skipping 96 matching lines @@
   virtual void GetSSLCertRequestInfo(SSLCertRequestInfo* cert_request_info) = 0;
 
   // HACK(willchan): Really, we should move the HttpResponseDrainer logic into
   // the HttpStream implementation. This is just a quick hack.
   virtual bool IsSpdyHttpStream() const = 0;
 
   // Record histogram of number of round trips taken to download the full
   // response body vs bytes transferred.
   virtual void LogNumRttVsBytesMetrics() const = 0;
 
+  // In the case of an HTTP error, flush the response body (usually a simple

[willchan no longer on Chromium, 2011/09/03 01:11:06]

It's not only used for HTTP errors, but also redirects.

[James Simonsen, 2011/09/07 21:20:10]

Done.

+  // error page) so that we can re-use the underlying connection. This stream
+  // is responsible for deleting itself when draining is complete.
+  virtual void Drain(HttpNetworkSession* session) = 0;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(HttpStream);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_H_