Added a net::BidirectionalStream to expose a bidirectional streaming interface

net/spdy/bidirectional_spdy_stream.h

+// Copyright 2015 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_SPDY_BIDIRECTIONAL_SPDY_STREAM_H_
+#define NET_SPDY_BIDIRECTIONAL_SPDY_STREAM_H_
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "net/http/bidirectional_stream.h"
+#include "net/http/http_request_info.h"
+#include "net/spdy/spdy_read_queue.h"
+#include "net/spdy/spdy_session.h"
+#include "net/spdy/spdy_stream.h"
+
+namespace net {
+
+struct HttpRequestInfo;
+class IOBuffer;
+
+class NET_EXPORT_PRIVATE BidirectionalSpdyStream : public BidirectionalStream,
+                                                   public SpdyStream::Delegate {
+ public:
+  BidirectionalSpdyStream(const base::WeakPtr<SpdySession>& spdy_session);
+  ~BidirectionalSpdyStream() override;
+
+  // BidirectionalStream implementation:
+
+  void Start(const HttpRequestInfo* request_info,
+             RequestPriority priority,
+             const BoundNetLog& net_log,
+             BidirectionalStream::Delegate* delegate) override;
+
+  int ReadData(IOBuffer* buf, int buf_len) override;
+
+  void SendData(IOBuffer* data, int length, bool end_stream) override;
+
+  void Cancel() override;
+
+  // SpdyStream::Delegate implementation:
+
+  void OnRequestHeadersSent() override;
+
+  SpdyResponseHeadersStatus OnResponseHeadersUpdated(
+      const SpdyHeaderBlock& response_headers) override;
+
+  void OnDataReceived(scoped_ptr<SpdyBuffer> buffer) override;
+
+  void OnDataSent() override;
+
+  void OnTrailers(const SpdyHeaderBlock& trailers) override;
+
+  void OnClose(int status) override;
+
+ private:
+  void SendRequestHeaders();
+  void OnStreamInitialized(int rv);
+  void ScheduleBufferedRead();
+  void DoBufferedRead();
+  bool ShouldWaitForMoreBufferedData() const;
+
+  const base::WeakPtr<SpdySession> spdy_session_;
+  bool stream_closed_;
+  int closed_stream_status_;
+  bool buffered_read_callback_pending_;
+  bool more_read_data_pending_;
+
+  const HttpRequestInfo* request_info_;
+  // Buffers the data as it arrives asynchronously from the stream.
+  SpdyReadQueue data_queue_;
+  // User provided buffer for ReadData() response.
+  scoped_refptr<IOBuffer> user_buffer_;
+  int user_buffer_len_;
+
+  BidirectionalStream::Delegate* delegate_;
+  SpdyStreamRequest stream_request_;
+  base::WeakPtr<SpdyStream> stream_;
+
+  base::WeakPtrFactory<BidirectionalSpdyStream> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(BidirectionalSpdyStream);
+};
+
+}  // namespace net
+
+#endif  // NET_SPDY_BIDIRECTIONAL_SPDY_STREAM_H_