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 #ifndef WebSocketExtensionParser_h 32 #define WebSocketExtensionParser_h 33 34 #include "wtf/HashMap.h" 35 #include "wtf/text/StringHash.h" 36 #include "wtf/text/WTFString.h" 37 38 namespace WebCore { 39 40 class WebSocketExtensionParser { 41 public: WebSocketExtensionParser(const char * start,const char * end)42 WebSocketExtensionParser(const char* start, const char* end) 43 : m_current(start) 44 , m_end(end) 45 { 46 } 47 bool finished(); 48 bool parsedSuccessfully(); 49 bool parseExtension(String& extensionToken, HashMap<String, String>& parameters); 50 51 private: 52 class ParserStateBackup { 53 public: ParserStateBackup(WebSocketExtensionParser * parser)54 ParserStateBackup(WebSocketExtensionParser* parser) 55 : m_parser(parser) 56 , m_current(parser->m_current) 57 , m_isDisposed(false) { } 58 ~ParserStateBackup(); 59 dispose()60 void dispose() { m_isDisposed = true; } 61 private: 62 WebSocketExtensionParser* m_parser; 63 const char* m_current; 64 bool m_isDisposed; 65 }; currentToken()66 const String& currentToken() { return m_currentToken; } 67 68 // The following member functions basically follow the grammar defined 69 // in Section 2.2 of RFC 2616. 70 bool consumeToken(); 71 bool consumeQuotedString(); 72 bool consumeQuotedStringOrToken(); 73 bool consumeCharacter(char); 74 75 void skipSpaces(); 76 77 const char* m_current; 78 const char* const m_end; 79 String m_currentToken; 80 }; 81 82 } // namespace WebCore 83 84 #endif // WebSocketExtensionParser_h 85