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| 1 /* | |
| 2 * Copyright (C) 2012 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions are | |
| 6 * met: | |
| 7 * | |
| 8 * * Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * * Redistributions in binary form must reproduce the above | |
| 11 * copyright notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * * Neither the name of Google Inc. nor the names of its | |
| 15 * contributors may be used to endorse or promote products derived from | |
| 16 * this software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #include "config.h" | |
| 32 | |
| 33 #include "modules/websockets/WebSocketDeflateFramer.h" | |
| 34 | |
| 35 #include "wtf/HashMap.h" | |
| 36 #include "wtf/text/StringHash.h" | |
| 37 #include "wtf/text/WTFString.h" | |
| 38 | |
| 39 namespace blink { | |
| 40 | |
| 41 class WebSocketExtensionDeflateFrame final : public WebSocketExtensionProcessor
{ | |
| 42 WTF_MAKE_FAST_ALLOCATED; | |
| 43 public: | |
| 44 static PassOwnPtr<WebSocketExtensionDeflateFrame> create(WebSocketDeflateFra
mer* framer) | |
| 45 { | |
| 46 return adoptPtr(new WebSocketExtensionDeflateFrame(framer)); | |
| 47 } | |
| 48 virtual ~WebSocketExtensionDeflateFrame() { } | |
| 49 | |
| 50 virtual String handshakeString() override; | |
| 51 virtual bool processResponse(const HashMap<String, String>&) override; | |
| 52 virtual String failureReason() override { return m_failureReason; } | |
| 53 | |
| 54 private: | |
| 55 WebSocketExtensionDeflateFrame(WebSocketDeflateFramer*); | |
| 56 | |
| 57 WebSocketDeflateFramer* m_framer; | |
| 58 bool m_responseProcessed; | |
| 59 String m_failureReason; | |
| 60 }; | |
| 61 | |
| 62 // FXIME: Remove vendor prefix after the specification matured. | |
| 63 WebSocketExtensionDeflateFrame::WebSocketExtensionDeflateFrame(WebSocketDeflateF
ramer* framer) | |
| 64 : WebSocketExtensionProcessor("x-webkit-deflate-frame") | |
| 65 , m_framer(framer) | |
| 66 , m_responseProcessed(false) | |
| 67 { | |
| 68 ASSERT(m_framer); | |
| 69 } | |
| 70 | |
| 71 String WebSocketExtensionDeflateFrame::handshakeString() | |
| 72 { | |
| 73 return extensionToken(); // No parameter | |
| 74 } | |
| 75 | |
| 76 bool WebSocketExtensionDeflateFrame::processResponse(const HashMap<String, Strin
g>& serverParameters) | |
| 77 { | |
| 78 if (m_responseProcessed) { | |
| 79 m_failureReason = "Received duplicate deflate-frame response"; | |
| 80 return false; | |
| 81 } | |
| 82 m_responseProcessed = true; | |
| 83 | |
| 84 unsigned expectedNumParameters = 0; | |
| 85 int windowBits = 15; | |
| 86 HashMap<String, String>::const_iterator parameter = serverParameters.find("m
ax_window_bits"); | |
| 87 if (parameter != serverParameters.end()) { | |
| 88 windowBits = parameter->value.toInt(); | |
| 89 if (windowBits < 8 || windowBits > 15) { | |
| 90 m_failureReason = "Received invalid max_window_bits parameter"; | |
| 91 return false; | |
| 92 } | |
| 93 expectedNumParameters++; | |
| 94 } | |
| 95 | |
| 96 WebSocketDeflater::ContextTakeOverMode mode = WebSocketDeflater::TakeOverCon
text; | |
| 97 parameter = serverParameters.find("no_context_takeover"); | |
| 98 if (parameter != serverParameters.end()) { | |
| 99 if (!parameter->value.isNull()) { | |
| 100 m_failureReason = "Received invalid no_context_takeover parameter"; | |
| 101 return false; | |
| 102 } | |
| 103 mode = WebSocketDeflater::DoNotTakeOverContext; | |
| 104 expectedNumParameters++; | |
| 105 } | |
| 106 | |
| 107 if (expectedNumParameters != serverParameters.size()) { | |
| 108 m_failureReason = "Received unexpected deflate-frame parameter"; | |
| 109 return false; | |
| 110 } | |
| 111 | |
| 112 m_framer->enableDeflate(windowBits, mode); | |
| 113 return true; | |
| 114 } | |
| 115 | |
| 116 DeflateResultHolder::DeflateResultHolder(WebSocketDeflateFramer* framer) | |
| 117 : m_framer(framer) | |
| 118 , m_succeeded(true) | |
| 119 { | |
| 120 ASSERT(m_framer); | |
| 121 } | |
| 122 | |
| 123 DeflateResultHolder::~DeflateResultHolder() | |
| 124 { | |
| 125 m_framer->resetDeflateContext(); | |
| 126 } | |
| 127 | |
| 128 void DeflateResultHolder::fail(const String& failureReason) | |
| 129 { | |
| 130 m_succeeded = false; | |
| 131 m_failureReason = failureReason; | |
| 132 } | |
| 133 | |
| 134 InflateResultHolder::InflateResultHolder(WebSocketDeflateFramer* framer) | |
| 135 : m_framer(framer) | |
| 136 , m_succeeded(true) | |
| 137 { | |
| 138 ASSERT(m_framer); | |
| 139 } | |
| 140 | |
| 141 InflateResultHolder::~InflateResultHolder() | |
| 142 { | |
| 143 m_framer->resetInflateContext(); | |
| 144 } | |
| 145 | |
| 146 void InflateResultHolder::fail(const String& failureReason) | |
| 147 { | |
| 148 m_succeeded = false; | |
| 149 m_failureReason = failureReason; | |
| 150 } | |
| 151 | |
| 152 WebSocketDeflateFramer::WebSocketDeflateFramer() | |
| 153 : m_enabled(false) | |
| 154 { | |
| 155 } | |
| 156 | |
| 157 PassOwnPtr<WebSocketExtensionProcessor> WebSocketDeflateFramer::createExtensionP
rocessor() | |
| 158 { | |
| 159 return WebSocketExtensionDeflateFrame::create(this); | |
| 160 } | |
| 161 | |
| 162 void WebSocketDeflateFramer::enableDeflate(int windowBits, WebSocketDeflater::Co
ntextTakeOverMode mode) | |
| 163 { | |
| 164 m_deflater = WebSocketDeflater::create(windowBits, mode); | |
| 165 m_inflater = WebSocketInflater::create(); | |
| 166 if (!m_deflater->initialize() || !m_inflater->initialize()) { | |
| 167 m_deflater.clear(); | |
| 168 m_inflater.clear(); | |
| 169 return; | |
| 170 } | |
| 171 m_enabled = true; | |
| 172 } | |
| 173 | |
| 174 PassOwnPtr<DeflateResultHolder> WebSocketDeflateFramer::deflate(WebSocketFrame&
frame) | |
| 175 { | |
| 176 OwnPtr<DeflateResultHolder> result = DeflateResultHolder::create(this); | |
| 177 if (!enabled() || !WebSocketFrame::isNonControlOpCode(frame.opCode) || !fram
e.payloadLength) | |
| 178 return result.release(); | |
| 179 if (!m_deflater->addBytes(frame.payload, frame.payloadLength) || !m_deflater
->finish()) { | |
| 180 result->fail("Failed to compress frame"); | |
| 181 return result.release(); | |
| 182 } | |
| 183 frame.compress = true; | |
| 184 frame.payload = m_deflater->data(); | |
| 185 frame.payloadLength = m_deflater->size(); | |
| 186 return result.release(); | |
| 187 } | |
| 188 | |
| 189 void WebSocketDeflateFramer::resetDeflateContext() | |
| 190 { | |
| 191 if (m_deflater) | |
| 192 m_deflater->reset(); | |
| 193 } | |
| 194 | |
| 195 PassOwnPtr<InflateResultHolder> WebSocketDeflateFramer::inflate(WebSocketFrame&
frame) | |
| 196 { | |
| 197 OwnPtr<InflateResultHolder> result = InflateResultHolder::create(this); | |
| 198 if (!enabled()) | |
| 199 return result.release(); | |
| 200 if (!frame.compress) | |
| 201 return result.release(); | |
| 202 if (!WebSocketFrame::isNonControlOpCode(frame.opCode)) { | |
| 203 result->fail("Received unexpected compressed frame"); | |
| 204 return result.release(); | |
| 205 } | |
| 206 if (!m_inflater->addBytes(frame.payload, frame.payloadLength) || !m_inflater
->finish()) { | |
| 207 result->fail("Failed to decompress frame"); | |
| 208 return result.release(); | |
| 209 } | |
| 210 frame.compress = false; | |
| 211 frame.payload = m_inflater->data(); | |
| 212 frame.payloadLength = m_inflater->size(); | |
| 213 return result.release(); | |
| 214 } | |
| 215 | |
| 216 void WebSocketDeflateFramer::resetInflateContext() | |
| 217 { | |
| 218 if (m_inflater) | |
| 219 m_inflater->reset(); | |
| 220 } | |
| 221 | |
| 222 void WebSocketDeflateFramer::didFail() | |
| 223 { | |
| 224 resetDeflateContext(); | |
| 225 resetInflateContext(); | |
| 226 } | |
| 227 | |
| 228 } // namespace blink | |
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Chromium Code Reviews
Issue 639333003:
Delete the old WebSocket implementation. (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master