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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/WebSocketExtensionDispatcher.h" | |
| 34 | |
| 35 #include "modules/websockets/WebSocketExtensionParser.h" | |
| 36 | |
| 37 #include "wtf/ASCIICType.h" | |
| 38 #include "wtf/HashMap.h" | |
| 39 #include "wtf/text/CString.h" | |
| 40 #include "wtf/text/StringHash.h" | |
| 41 | |
| 42 namespace blink { | |
| 43 | |
| 44 void WebSocketExtensionDispatcher::reset() | |
| 45 { | |
| 46 m_processors.clear(); | |
| 47 } | |
| 48 | |
| 49 void WebSocketExtensionDispatcher::addProcessor(PassOwnPtr<WebSocketExtensionPro
cessor> processor) | |
| 50 { | |
| 51 for (size_t i = 0; i < m_processors.size(); ++i) { | |
| 52 if (m_processors[i]->extensionToken() == processor->extensionToken()) | |
| 53 return; | |
| 54 } | |
| 55 ASSERT(processor->handshakeString().length()); | |
| 56 ASSERT(!processor->handshakeString().contains('\n')); | |
| 57 ASSERT(!processor->handshakeString().contains(static_cast<UChar>('\0'))); | |
| 58 m_processors.append(processor); | |
| 59 } | |
| 60 | |
| 61 const String WebSocketExtensionDispatcher::createHeaderValue() const | |
| 62 { | |
| 63 size_t numProcessors = m_processors.size(); | |
| 64 if (!numProcessors) | |
| 65 return String(); | |
| 66 | |
| 67 StringBuilder builder; | |
| 68 builder.append(m_processors[0]->handshakeString()); | |
| 69 for (size_t i = 1; i < numProcessors; ++i) { | |
| 70 builder.appendLiteral(", "); | |
| 71 builder.append(m_processors[i]->handshakeString()); | |
| 72 } | |
| 73 return builder.toString(); | |
| 74 } | |
| 75 | |
| 76 void WebSocketExtensionDispatcher::appendAcceptedExtension(const String& extensi
onToken, HashMap<String, String>& extensionParameters) | |
| 77 { | |
| 78 if (!m_acceptedExtensionsBuilder.isEmpty()) | |
| 79 m_acceptedExtensionsBuilder.appendLiteral(", "); | |
| 80 m_acceptedExtensionsBuilder.append(extensionToken); | |
| 81 // FIXME: Should use ListHashSet to keep the order of the parameters. | |
| 82 for (HashMap<String, String>::const_iterator iterator = extensionParameters.
begin(); iterator != extensionParameters.end(); ++iterator) { | |
| 83 m_acceptedExtensionsBuilder.appendLiteral("; "); | |
| 84 m_acceptedExtensionsBuilder.append(iterator->key); | |
| 85 if (!iterator->value.isNull()) { | |
| 86 m_acceptedExtensionsBuilder.append('='); | |
| 87 m_acceptedExtensionsBuilder.append(iterator->value); | |
| 88 } | |
| 89 } | |
| 90 } | |
| 91 | |
| 92 void WebSocketExtensionDispatcher::fail(const String& reason) | |
| 93 { | |
| 94 m_failureReason = reason; | |
| 95 m_acceptedExtensionsBuilder.clear(); | |
| 96 } | |
| 97 | |
| 98 bool WebSocketExtensionDispatcher::processHeaderValue(const String& headerValue) | |
| 99 { | |
| 100 if (!headerValue.length()) | |
| 101 return true; | |
| 102 | |
| 103 // If we don't send Sec-WebSocket-Extensions header, the server should not r
eturn the header. | |
| 104 if (!m_processors.size()) { | |
| 105 fail("Response must not include 'Sec-WebSocket-Extensions' header if not
present in request: " + headerValue); | |
| 106 return false; | |
| 107 } | |
| 108 | |
| 109 const CString headerValueData = headerValue.utf8(); | |
| 110 WebSocketExtensionParser parser(headerValueData.data(), headerValueData.data
() + headerValueData.length()); | |
| 111 while (!parser.finished()) { | |
| 112 String extensionToken; | |
| 113 HashMap<String, String> extensionParameters; | |
| 114 if (!parser.parseExtension(extensionToken, extensionParameters)) { | |
| 115 fail("Invalid 'Sec-WebSocket-Extensions' header"); | |
| 116 return false; | |
| 117 } | |
| 118 | |
| 119 size_t index; | |
| 120 for (index = 0; index < m_processors.size(); ++index) { | |
| 121 WebSocketExtensionProcessor* processor = m_processors[index].get(); | |
| 122 if (extensionToken == processor->extensionToken()) { | |
| 123 if (processor->processResponse(extensionParameters)) { | |
| 124 appendAcceptedExtension(extensionToken, extensionParameters)
; | |
| 125 break; | |
| 126 } | |
| 127 fail("Error in " + extensionToken + ": " + processor->failureRea
son()); | |
| 128 return false; | |
| 129 } | |
| 130 } | |
| 131 // There is no extension which can process the response. | |
| 132 if (index == m_processors.size()) { | |
| 133 fail("Found an unsupported extension '" + extensionToken + "' in 'Se
c-WebSocket-Extensions' header"); | |
| 134 return false; | |
| 135 } | |
| 136 } | |
| 137 return parser.parsedSuccessfully(); | |
| 138 } | |
| 139 | |
| 140 String WebSocketExtensionDispatcher::acceptedExtensions() const | |
| 141 { | |
| 142 if (m_acceptedExtensionsBuilder.isEmpty()) | |
| 143 return String(); | |
| 144 return m_acceptedExtensionsBuilder.toString(); | |
| 145 } | |
| 146 | |
| 147 String WebSocketExtensionDispatcher::failureReason() const | |
| 148 { | |
| 149 return m_failureReason; | |
| 150 } | |
| 151 | |
| 152 } // 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