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

net/http/bidirectional_stream.cc

+// 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.
+
+#include "net/http/bidirectional_stream.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "net/base/request_priority.h"
+#include "net/spdy/spdy_buffer.h"
+#include "net/spdy/spdy_header_block.h"
+#include "net/spdy/spdy_http_utils.h"
+#include "net/spdy/spdy_stream.h"
+
+namespace net {
+
+BidirectionalStream::BidirectionalStream(
+    const base::WeakPtr<SpdySession>& spdy_session)
+    : spdy_session_(spdy_session), weak_factory_(this) {}
+
+BidirectionalStream::~BidirectionalStream() {}
+
+void BidirectionalStream::Start(const HttpRequestInfo* request_info,
+                                Delegate* delegate) {
+  delegate_ = delegate;
+  DCHECK(!stream_);
+  if (!spdy_session_)
+    delegate_->OnFailed(ERR_CONNECTION_CLOSED);
+
+  request_info_ = request_info;
+
+  // TODO(xunjieli): Incorporate request priority and NetLog.
+  int rv = stream_request_.StartRequest(
+      SPDY_REQUEST_RESPONSE_STREAM, spdy_session_, request_info_->url,
+      net::DEFAULT_PRIORITY, BoundNetLog(),
+      base::Bind(&BidirectionalStream::OnStreamInitialized,
+                 weak_factory_.GetWeakPtr()));
+  if (rv != ERR_IO_PENDING)
+    OnStreamInitialized(rv);
+}
+
+void BidirectionalStream::SendData(IOBuffer* data,
+                                   int length,
+                                   bool end_stream) {
+  stream_->SendData(data, length,
+                    end_stream ? NO_MORE_DATA_TO_SEND : MORE_DATA_TO_SEND);
+}
+
+void BidirectionalStream::OnRequestHeadersSent() {
+  delegate_->OnRequestHeadersSent();
+}
+
+SpdyResponseHeadersStatus BidirectionalStream::OnResponseHeadersUpdated(
+    const SpdyHeaderBlock& response_headers) {
+  delegate_->OnHeaders(response_headers);
+  return RESPONSE_HEADERS_ARE_COMPLETE;
+}
+
+void BidirectionalStream::OnDataReceived(scoped_ptr<SpdyBuffer> buffer) {
+  delegate_->OnDataReceived(buffer.Pass());
+}
+
+void BidirectionalStream::OnDataSent() {
+  delegate_->OnDataSent();
+}
+
+void BidirectionalStream::OnTrailers(const SpdyHeaderBlock& trailers) {
+  delegate_->OnTrailers(trailers);
+}
+
+void BidirectionalStream::OnClose(int status) {
+  delegate_->OnClose(status);
+}
+
+void BidirectionalStream::SendRequestHeaders() {
+  stream_->SetDelegate(this);
+  scoped_ptr<SpdyHeaderBlock> headers(new SpdyHeaderBlock);
+  CreateSpdyHeadersFromHttpRequest(*request_info_, request_info_->extra_headers,
+                                   stream_->GetProtocolVersion(), true,
+                                   headers.get());
+  bool end_stream = (request_info_->method == "GET");

[mef, 2015/09/30 16:18:16]

I wonder what should happen with different request methods, like PUT or HEAD?

[xunjieli, 2015/10/01 18:41:16]

I am not sure. Should we limit the use to POST and GET for now? Since that is
probably our test server supports, and what our embedders want right now. 

[mef, 2015/10/07 23:44:56]

Yeah, I think it is fine to keep this for now. 

+  stream_->SendRequestHeaders(
+      headers.Pass(), end_stream ? NO_MORE_DATA_TO_SEND : MORE_DATA_TO_SEND);
+}
+
+void BidirectionalStream::OnStreamInitialized(int rv) {
+  DCHECK_NE(ERR_IO_PENDING, rv);
+  if (rv == OK) {
+    stream_ = stream_request_.ReleaseStream();
+    SendRequestHeaders();
+    return;
+  }
+  delegate_->OnFailed(rv);
+}
+
+}  // namespace net