src/net/spdy/hpack_decoder.h

   1 // Copyright 2014 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_SPDY_HPACK_DECODER_H_
   6 #define NET_SPDY_HPACK_DECODER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/macros.h"
  13 #include "base/strings/string_piece.h"
  14 #include "net/base/net_export.h"
  15 #include "net/spdy/hpack_encoding_context.h"
  16 #include "net/spdy/hpack_input_stream.h"  // For HpackHeaderPairVector.
  17
  18 namespace net {
  19
  20 // An HpackDecoder decodes header sets as outlined in
  21 // http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-05
  22 // .
  23 class NET_EXPORT_PRIVATE HpackDecoder {
  24  public:
  25   explicit HpackDecoder(uint32 max_string_literal_size);
  26   ~HpackDecoder();
  27
  28   // Decodes the given string into the given header set. Returns
  29   // whether or not the decoding was successful.
  30   //
  31   // TODO(akalin): Emit the headers via a callback/delegate instead of
  32   // putting them into a vector.
  33   bool DecodeHeaderSet(base::StringPiece input,
  34                        HpackHeaderPairVector* header_list);
  35
  36   // Accessors for testing.
  37
  38   bool DecodeNextNameForTest(HpackInputStream* input_stream,
  39                              base::StringPiece* next_name) {
  40     return DecodeNextName(input_stream, next_name);
  41   }
  42
  43  private:
  44   const uint32 max_string_literal_size_;
  45   HpackEncodingContext context_;
  46
  47   // Tries to process the next header representation and maybe emit
  48   // headers into |header_list| according to it. Returns true if
  49   // successful, or false if an error was encountered.
  50   bool ProcessNextHeaderRepresentation(
  51       HpackInputStream* input_stream,
  52       HpackHeaderPairVector* header_list);
  53
  54   bool DecodeNextName(HpackInputStream* input_stream,
  55                       base::StringPiece* next_name);
  56   bool DecodeNextValue(HpackInputStream* input_stream,
  57                        base::StringPiece* next_name);
  58
  59   DISALLOW_COPY_AND_ASSIGN(HpackDecoder);
  60 };
  61
  62 }  // namespace net
  63
  64 #endif  // NET_SPDY_HPACK_DECODER_H_