net/quic/spdy_utils.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/quic/spdy_utils.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "net/spdy/spdy_frame_builder.h"
   9 #include "net/spdy/spdy_framer.h"
  10 #include "net/spdy/spdy_protocol.h"
  11
  12 using std::string;
  13
  14 namespace net {
  15
  16 // static
  17 SpdyMajorVersion SpdyUtils::GetSpdyVersionForQuicVersion(
  18     QuicVersion quic_version) {
  19   if (quic_version > QUIC_VERSION_24) {
  20     return SPDY4;
  21   }
  22   return SPDY3;
  23 }
  24
  25 // static
  26 SpdyHeaderBlock SpdyUtils::ConvertSpdy3ResponseHeadersToSpdy4(
  27     SpdyHeaderBlock response_headers) {
  28   // SPDY/4 headers include neither the version field nor the response details.
  29   response_headers.erase(":version");
  30   size_t end_of_code = response_headers[":status"].find(' ');
  31   if (end_of_code != string::npos) {
  32     response_headers[":status"].erase(end_of_code);
  33   }
  34   return response_headers;
  35 }
  36
  37 // static
  38 string SpdyUtils::SerializeUncompressedHeaders(const SpdyHeaderBlock& headers,
  39                                                QuicVersion quic_version) {
  40   SpdyMajorVersion spdy_version = GetSpdyVersionForQuicVersion(quic_version);
  41
  42   int length = SpdyFramer::GetSerializedLength(spdy_version, &headers);
  43   SpdyFrameBuilder builder(length, spdy_version);
  44   SpdyFramer::WriteHeaderBlock(&builder, spdy_version, &headers);
  45   scoped_ptr<SpdyFrame> block(builder.take());
  46   return string(block->data(), length);
  47 }
  48
  49 }  // namespace net