| OLD | NEW |
|---|
| (Empty) |
| 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/quic_spdy_decompressor.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 | |
| 9 #include "base/logging.h" | |
| 10 | |
| 11 using base::StringPiece; | |
| 12 using std::min; | |
| 13 | |
| 14 namespace net { | |
| 15 | |
| 16 class SpdyFramerVisitor : public SpdyFramerVisitorInterface { | |
| 17 public: | |
| 18 explicit SpdyFramerVisitor(QuicSpdyDecompressor::Visitor* visitor) | |
| 19 : visitor_(visitor), | |
| 20 error_(false) { | |
| 21 } | |
| 22 | |
| 23 virtual void OnError(SpdyFramer* framer) OVERRIDE { | |
| 24 error_ = true; | |
| 25 } | |
| 26 virtual void OnDataFrameHeader(SpdyStreamId stream_id, | |
| 27 size_t length, | |
| 28 bool fin) OVERRIDE {} | |
| 29 virtual void OnStreamFrameData(SpdyStreamId stream_id, | |
| 30 const char* data, | |
| 31 size_t len, | |
| 32 bool fin) OVERRIDE {} | |
| 33 virtual bool OnControlFrameHeaderData(SpdyStreamId stream_id, | |
| 34 const char* header_data, | |
| 35 size_t len) OVERRIDE; | |
| 36 virtual void OnSynStream(SpdyStreamId stream_id, | |
| 37 SpdyStreamId associated_stream_id, | |
| 38 SpdyPriority priority, | |
| 39 bool fin, | |
| 40 bool unidirectional) OVERRIDE {} | |
| 41 virtual void OnSynReply(SpdyStreamId stream_id, bool fin) OVERRIDE {} | |
| 42 virtual void OnRstStream(SpdyStreamId stream_id, | |
| 43 SpdyRstStreamStatus status) OVERRIDE {} | |
| 44 virtual void OnSetting(SpdySettingsIds id, | |
| 45 uint8 flags, | |
| 46 uint32 value) OVERRIDE {} | |
| 47 virtual void OnSettingsAck() OVERRIDE {} | |
| 48 virtual void OnSettingsEnd() OVERRIDE {} | |
| 49 virtual void OnPing(SpdyPingId unique_id, bool is_ack) OVERRIDE {} | |
| 50 virtual void OnGoAway(SpdyStreamId last_accepted_stream_id, | |
| 51 SpdyGoAwayStatus status) OVERRIDE {} | |
| 52 virtual void OnHeaders(SpdyStreamId stream_id, bool fin) OVERRIDE {} | |
| 53 virtual void OnWindowUpdate(SpdyStreamId stream_id, | |
| 54 uint32 delta_window_size) OVERRIDE {} | |
| 55 virtual void OnPushPromise(SpdyStreamId stream_id, | |
| 56 SpdyStreamId promised_stream_id) OVERRIDE {} | |
| 57 void set_visitor(QuicSpdyDecompressor::Visitor* visitor) { | |
| 58 DCHECK(visitor); | |
| 59 visitor_ = visitor; | |
| 60 } | |
| 61 | |
| 62 private: | |
| 63 QuicSpdyDecompressor::Visitor* visitor_; | |
| 64 bool error_; | |
| 65 }; | |
| 66 | |
| 67 bool SpdyFramerVisitor::OnControlFrameHeaderData(SpdyStreamId stream_id, | |
| 68 const char* header_data, | |
| 69 size_t len) { | |
| 70 DCHECK(visitor_); | |
| 71 return visitor_->OnDecompressedData(StringPiece(header_data, len)); | |
| 72 } | |
| 73 | |
| 74 QuicSpdyDecompressor::QuicSpdyDecompressor() | |
| 75 : spdy_framer_(SPDY3), | |
| 76 spdy_visitor_(new SpdyFramerVisitor(NULL)), | |
| 77 current_header_id_(1), | |
| 78 has_current_compressed_size_(false), | |
| 79 current_compressed_size_(0), | |
| 80 compressed_bytes_consumed_(0) { | |
| 81 spdy_framer_.set_visitor(spdy_visitor_.get()); | |
| 82 } | |
| 83 | |
| 84 QuicSpdyDecompressor::~QuicSpdyDecompressor() { | |
| 85 } | |
| 86 | |
| 87 size_t QuicSpdyDecompressor::DecompressData(StringPiece data, | |
| 88 Visitor* visitor) { | |
| 89 spdy_visitor_->set_visitor(visitor); | |
| 90 size_t bytes_consumed = 0; | |
| 91 | |
| 92 if (!has_current_compressed_size_) { | |
| 93 const size_t kCompressedBufferSizeSize = sizeof(uint32); | |
| 94 DCHECK_GT(kCompressedBufferSizeSize, compressed_size_buffer_.length()); | |
| 95 size_t missing_size = | |
| 96 kCompressedBufferSizeSize - compressed_size_buffer_.length(); | |
| 97 if (data.length() < missing_size) { | |
| 98 data.AppendToString(&compressed_size_buffer_); | |
| 99 return data.length(); | |
| 100 } | |
| 101 bytes_consumed += missing_size; | |
| 102 data.substr(0, missing_size).AppendToString(&compressed_size_buffer_); | |
| 103 DCHECK_EQ(kCompressedBufferSizeSize, compressed_size_buffer_.length()); | |
| 104 memcpy(¤t_compressed_size_, compressed_size_buffer_.data(), | |
| 105 kCompressedBufferSizeSize); | |
| 106 compressed_size_buffer_.clear(); | |
| 107 has_current_compressed_size_ = true; | |
| 108 data = data.substr(missing_size); | |
| 109 compressed_bytes_consumed_ = 0; | |
| 110 } | |
| 111 | |
| 112 size_t bytes_to_consume = | |
| 113 min(current_compressed_size_ - compressed_bytes_consumed_, | |
| 114 static_cast<uint32>(data.length())); | |
| 115 if (bytes_to_consume > 0) { | |
| 116 if (!spdy_framer_.IncrementallyDecompressControlFrameHeaderData( | |
| 117 current_header_id_, data.data(), bytes_to_consume)) { | |
| 118 visitor->OnDecompressionError(); | |
| 119 return bytes_consumed; | |
| 120 } | |
| 121 compressed_bytes_consumed_ += bytes_to_consume; | |
| 122 bytes_consumed += bytes_to_consume; | |
| 123 } | |
| 124 if (current_compressed_size_ - compressed_bytes_consumed_ == 0) { | |
| 125 ResetForNextHeaders(); | |
| 126 } | |
| 127 return bytes_consumed; | |
| 128 } | |
| 129 | |
| 130 void QuicSpdyDecompressor::ResetForNextHeaders() { | |
| 131 has_current_compressed_size_ = false; | |
| 132 current_compressed_size_ = 0; | |
| 133 compressed_bytes_consumed_ = 0; | |
| 134 ++current_header_id_; | |
| 135 } | |
| 136 | |
| 137 } // namespace net | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 185203003:
Killing off QUICv12, including cleaning out all of the code for handling (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src