| // Copyright (c) 2013 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. |
| |
| #ifndef NET_QUIC_QUIC_SPDY_DECOMPRESSOR_H_ |
| #define NET_QUIC_QUIC_SPDY_DECOMPRESSOR_H_ |
| |
| #include <string> |
| |
| #include "base/basictypes.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/strings/string_piece.h" |
| #include "net/base/net_export.h" |
| #include "net/quic/quic_protocol.h" |
| #include "net/spdy/spdy_framer.h" |
| |
| namespace net { |
| |
| class SpdyFramerVisitor; |
| |
| // Handles the compression of request/response headers blocks. |
| class NET_EXPORT_PRIVATE QuicSpdyDecompressor { |
| public: |
| // Interface that receives callbacks with decompressed data as it |
| // becomes available. |
| class NET_EXPORT_PRIVATE Visitor { |
| public: |
| virtual ~Visitor() {} |
| virtual bool OnDecompressedData(base::StringPiece data) = 0; |
| virtual void OnDecompressionError() = 0; |
| }; |
| |
| QuicSpdyDecompressor(); |
| ~QuicSpdyDecompressor(); |
| |
| // Decompresses the data in |data| and invokes |OnDecompressedData|, |
| // possibly multiple times, on |visitor|. Returns number of bytes |
| // consumed from |data|. |
| size_t DecompressData(base::StringPiece data, Visitor* visitor); |
| |
| QuicHeaderId current_header_id() { return current_header_id_; } |
| |
| private: |
| void ResetForNextHeaders(); |
| |
| SpdyFramer spdy_framer_; |
| scoped_ptr<SpdyFramerVisitor> spdy_visitor_; |
| // ID of the header currently being parsed. |
| QuicHeaderId current_header_id_; |
| // True when the size of the headers has been parsed. |
| bool has_current_compressed_size_; |
| // Size of the headers being parsed. |
| uint32 current_compressed_size_; |
| // Buffer into which the partial compressed size is written until |
| // it is fully parsed. |
| std::string compressed_size_buffer_; |
| // Number of compressed bytes consumed, out of the total in |
| // |current_compressed_size_|. |
| uint32 compressed_bytes_consumed_; |
| DISALLOW_COPY_AND_ASSIGN(QuicSpdyDecompressor); |
| }; |
| |
| } // namespace net |
| |
| #endif // NET_QUIC_QUIC_SPDY_DECOMPRESSOR_H_ |