net/quic/quic_spdy_compressor.h

   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 #ifndef NET_QUIC_QUIC_SPDY_COMPRESSOR_H_
   6 #define NET_QUIC_QUIC_SPDY_COMPRESSOR_H_
   7
   8 #include <string>
   9
  10 #include "net/base/net_export.h"
  11 #include "net/quic/quic_protocol.h"
  12 #include "net/spdy/spdy_framer.h"
  13
  14 namespace net {
  15
  16 // Handles the compression of request/response headers blocks.  The
  17 // serialized format is:
  18 // uint32 - Priority
  19 // uint32 - Header ID
  20 // uint32 - Compressed header length
  21 // ... - Compressed data
  22 //
  23 class NET_EXPORT_PRIVATE QuicSpdyCompressor {
  24  public:
  25   QuicSpdyCompressor();
  26   ~QuicSpdyCompressor();
  27
  28   // Returns a string comprised of [header_sequence_id, compressed_headers].
  29   std::string CompressHeaders(const SpdyHeaderBlock& headers);
  30
  31   // Returns a string comprised of
  32   // [priority, header_sequence_id, compressed_headers]
  33   std::string CompressHeadersWithPriority(QuicPriority priority,
  34                                           const SpdyHeaderBlock& headers);
  35
  36  private:
  37   std::string CompressHeadersInternal(QuicPriority priority,
  38                                       const SpdyHeaderBlock& headers,
  39                                       bool write_priority);
  40
  41   SpdyFramer spdy_framer_;
  42   QuicHeaderId header_sequence_id_;
  43
  44   DISALLOW_COPY_AND_ASSIGN(QuicSpdyCompressor);
  45 };
  46
  47 }  // namespace net
  48
  49 #endif  // NET_QUIC_QUIC_SPDY_COMPRESSOR_H_