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.
5 #ifndef NET_QUIC_QUIC_SPDY_DECOMPRESSOR_H_
6 #define NET_QUIC_QUIC_SPDY_DECOMPRESSOR_H_
10 #include "base/basictypes.h"
11 #include "base/memory/scoped_ptr.h"
12 #include "base/strings/string_piece.h"
13 #include "net/base/net_export.h"
14 #include "net/quic/quic_protocol.h"
15 #include "net/spdy/spdy_framer.h"
19 class SpdyFramerVisitor;
21 // Handles the compression of request/response headers blocks.
22 class NET_EXPORT_PRIVATE QuicSpdyDecompressor {
24 // Interface that receives callbacks with decompressed data as it
26 class NET_EXPORT_PRIVATE Visitor {
29 virtual bool OnDecompressedData(base::StringPiece data) = 0;
30 virtual void OnDecompressionError() = 0;
33 QuicSpdyDecompressor();
34 ~QuicSpdyDecompressor();
36 // Decompresses the data in |data| and invokes |OnDecompressedData|,
37 // possibly multiple times, on |visitor|. Returns number of bytes
38 // consumed from |data|.
39 size_t DecompressData(base::StringPiece data, Visitor* visitor);
41 QuicHeaderId current_header_id() { return current_header_id_; }
44 void ResetForNextHeaders();
46 SpdyFramer spdy_framer_;
47 scoped_ptr<SpdyFramerVisitor> spdy_visitor_;
48 // ID of the header currently being parsed.
49 QuicHeaderId current_header_id_;
50 // True when the size of the headers has been parsed.
51 bool has_current_compressed_size_;
52 // Size of the headers being parsed.
53 uint32 current_compressed_size_;
54 // Buffer into which the partial compressed size is written until
55 // it is fully parsed.
56 std::string compressed_size_buffer_;
57 // Number of compressed bytes consumed, out of the total in
58 // |current_compressed_size_|.
59 uint32 compressed_bytes_consumed_;
60 DISALLOW_COPY_AND_ASSIGN(QuicSpdyDecompressor);
65 #endif // NET_QUIC_QUIC_SPDY_DECOMPRESSOR_H_