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1 // Copyright 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 #ifndef NET_WEBSOCKETS_WEBSOCKET_EXTENSION_PARSER_H_ | |
6 #define NET_WEBSOCKETS_WEBSOCKET_EXTENSION_PARSER_H_ | |
7 | |
8 #include <string> | |
9 | |
10 #include "base/strings/string_piece.h" | |
11 #include "net/base/net_export.h" | |
12 #include "net/websockets/websocket_extension.h" | |
13 | |
14 namespace net { | |
15 | |
16 class NET_EXPORT_PRIVATE WebSocketExtensionParser { | |
17 public: | |
18 WebSocketExtensionParser(); | |
19 ~WebSocketExtensionParser(); | |
20 | |
21 // Parses the given string as a WebSocket extension header value. | |
22 // This parser assumes some preprocesses are made. | |
23 // - The parser parses single extension at a time. This means that | |
24 // the parser parses |extension| in RFC6455 9.1, not |extension-list|. | |
25 // - There is no newline characters in the input. LWS-concatenation must | |
26 // have already been done. | |
27 void Parse(const char* data, size_t size); | |
28 void Parse(const std::string& data) { | |
29 Parse(data.data(), data.size()); | |
30 } | |
31 | |
32 bool has_error() const { return has_error_; } | |
33 const WebSocketExtension& extension() const { return extension_; } | |
34 | |
35 private: | |
36 void Consume(char c); | |
37 void ConsumeExtension(WebSocketExtension* extension); | |
38 void ConsumeExtensionParameter(WebSocketExtension::Parameter* parameter); | |
39 void ConsumeToken(base::StringPiece* token); | |
40 void ConsumeQuotedToken(std::string* token); | |
41 void ConsumeSpaces(); | |
42 bool Lookahead(char c); | |
43 bool ConsumeIfMatch(char c); | |
44 size_t UnconsumedBytes() const { return end_ - current_; } | |
45 | |
46 static bool IsControl(char c); | |
47 static bool IsSeparator(char c); | |
48 | |
49 const char* current_; | |
50 const char* end_; | |
51 bool has_error_; | |
52 WebSocketExtension extension_; | |
53 | |
54 DISALLOW_COPY_AND_ASSIGN(WebSocketExtensionParser); | |
55 }; | |
56 | |
57 } // namespace net | |
58 | |
59 #endif // NET_WEBSOCKETS_WEBSOCKET_EXTENSION_PARSER_H_ | |
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