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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 #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 blink { | |
39 | |
40 class WebSocketExtensionParser { | |
41 public: | |
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>& paramet
ers); | |
50 | |
51 private: | |
52 class ParserStateBackup { | |
53 public: | |
54 ParserStateBackup(WebSocketExtensionParser* parser) | |
55 : m_parser(parser) | |
56 , m_current(parser->m_current) | |
57 , m_isDisposed(false) { } | |
58 ~ParserStateBackup(); | |
59 | |
60 void dispose() { m_isDisposed = true; } | |
61 private: | |
62 WebSocketExtensionParser* m_parser; | |
63 const char* m_current; | |
64 bool m_isDisposed; | |
65 }; | |
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 blink | |
83 | |
84 #endif // WebSocketExtensionParser_h | |
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