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| 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 OnSynStream(SpdyStreamId stream_id, | |
| 27 SpdyStreamId associated_stream_id, | |
| 28 SpdyPriority priority, | |
| 29 uint8 credential_slot, | |
| 30 bool fin, | |
| 31 bool unidirectional) OVERRIDE {} | |
| 32 virtual void OnSynReply(SpdyStreamId stream_id, bool fin) OVERRIDE {} | |
| 33 virtual void OnHeaders(SpdyStreamId stream_id, bool fin) OVERRIDE {} | |
| 34 virtual bool OnControlFrameHeaderData(SpdyStreamId stream_id, | |
| 35 const char* header_data, | |
| 36 size_t len) OVERRIDE; | |
| 37 virtual bool OnCredentialFrameData(const char* credential_data, | |
| 38 size_t len) OVERRIDE { | |
| 39 return false; | |
| 40 } | |
| 41 virtual void OnDataFrameHeader(SpdyStreamId stream_id, | |
| 42 size_t length, | |
| 43 bool fin) OVERRIDE {} | |
| 44 virtual void OnStreamFrameData(SpdyStreamId stream_id, | |
| 45 const char* data, | |
| 46 size_t len, | |
| 47 bool fin) OVERRIDE {} | |
| 48 virtual void OnSetting(SpdySettingsIds id, | |
| 49 uint8 flags, | |
| 50 uint32 value) OVERRIDE {} | |
| 51 virtual void OnPing(uint32 unique_id) OVERRIDE {} | |
| 52 virtual void OnRstStream(SpdyStreamId stream_id, | |
| 53 SpdyRstStreamStatus status) OVERRIDE {} | |
| 54 virtual void OnGoAway(SpdyStreamId last_accepted_stream_id, | |
| 55 SpdyGoAwayStatus status) OVERRIDE {} | |
| 56 virtual void OnWindowUpdate(SpdyStreamId stream_id, | |
| 57 uint32 delta_window_size) OVERRIDE {} | |
| 58 virtual void OnSynStreamCompressed(size_t uncompressed_size, | |
| 59 size_t compressed_size) OVERRIDE {} | |
| 60 void set_visitor(QuicSpdyDecompressor::Visitor* visitor) { | |
| 61 DCHECK(visitor); | |
| 62 visitor_ = visitor; | |
| 63 } | |
| 64 | |
| 65 private: | |
| 66 QuicSpdyDecompressor::Visitor* visitor_; | |
| 67 bool error_; | |
| 68 }; | |
| 69 | |
| 70 bool SpdyFramerVisitor::OnControlFrameHeaderData(SpdyStreamId stream_id, | |
| 71 const char* header_data, | |
| 72 size_t len) { | |
| 73 DCHECK(visitor_); | |
| 74 return visitor_->OnDecompressedData(StringPiece(header_data, len)); | |
| 75 } | |
| 76 | |
| 77 QuicSpdyDecompressor::QuicSpdyDecompressor() | |
| 78 : spdy_framer_(3), | |
| 79 spdy_visitor_(new SpdyFramerVisitor(NULL)), | |
| 80 current_header_id_(1), | |
| 81 has_current_compressed_size_(false), | |
| 82 current_compressed_size_(0), | |
| 83 compressed_bytes_consumed_(0) { | |
| 84 spdy_framer_.set_visitor(spdy_visitor_.get()); | |
| 85 } | |
| 86 | |
| 87 QuicSpdyDecompressor::~QuicSpdyDecompressor() { | |
| 88 } | |
| 89 | |
| 90 size_t QuicSpdyDecompressor::DecompressData(StringPiece data, | |
| 91 Visitor* visitor) { | |
| 92 spdy_visitor_->set_visitor(visitor); | |
| 93 size_t bytes_consumed = 0; | |
| 94 | |
| 95 if (!has_current_compressed_size_) { | |
| 96 const size_t kCompressedBufferSizeSize = sizeof(uint32); | |
| 97 DCHECK_GT(kCompressedBufferSizeSize, compressed_size_buffer_.length()); | |
| 98 size_t missing_size = | |
| 99 kCompressedBufferSizeSize - compressed_size_buffer_.length(); | |
| 100 if (data.length() < missing_size) { | |
| 101 data.AppendToString(&compressed_size_buffer_); | |
| 102 return data.length(); | |
| 103 } | |
| 104 bytes_consumed += missing_size; | |
| 105 data.substr(0, missing_size).AppendToString(&compressed_size_buffer_); | |
| 106 DCHECK_EQ(kCompressedBufferSizeSize, compressed_size_buffer_.length()); | |
| 107 memcpy(¤t_compressed_size_, compressed_size_buffer_.data(), | |
| 108 kCompressedBufferSizeSize); | |
| 109 compressed_size_buffer_.clear(); | |
| 110 has_current_compressed_size_ = true; | |
| 111 data = data.substr(missing_size); | |
| 112 compressed_bytes_consumed_ = 0; | |
| 113 } | |
| 114 | |
| 115 size_t bytes_to_consume = | |
| 116 min(current_compressed_size_ - compressed_bytes_consumed_, | |
| 117 static_cast<uint32>(data.length())); | |
| 118 if (bytes_to_consume > 0) { | |
| 119 bool success = spdy_framer_.IncrementallyDecompressControlFrameHeaderData( | |
| 120 current_header_id_, data.data(), bytes_to_consume); | |
| 121 DCHECK(success); | |
| 122 compressed_bytes_consumed_ += bytes_to_consume; | |
| 123 bytes_consumed += bytes_to_consume; | |
| 124 } | |
| 125 if (current_compressed_size_ - compressed_bytes_consumed_ == 0) { | |
| 126 ResetForNextHeaders(); | |
| 127 } | |
| 128 return bytes_consumed; | |
| 129 } | |
| 130 | |
| 131 void QuicSpdyDecompressor::ResetForNextHeaders() { | |
| 132 has_current_compressed_size_ = false; | |
| 133 current_compressed_size_ = 0; | |
| 134 compressed_bytes_consumed_ = 0; | |
| 135 ++current_header_id_; | |
| 136 } | |
| 137 | |
| 138 } // namespace net | |
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Chromium Code Reviews
Issue 15018013:
Revert 198736 "Land Recent QUIC changes" (Closed)
Base URL: svn://svn.chromium.org/chrome/