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_ 60
