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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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