// Copyright 2013 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef NET_WEBSOCKETS_WEBSOCKET_EXTENSION_PARSER_H_ #define NET_WEBSOCKETS_WEBSOCKET_EXTENSION_PARSER_H_ #include #include #include #include "base/strings/string_piece.h" #include "net/base/net_export.h" #include "net/websockets/websocket_extension.h" namespace net { class NET_EXPORT_PRIVATE WebSocketExtensionParser { public: WebSocketExtensionParser(); WebSocketExtensionParser(const WebSocketExtensionParser&) = delete; WebSocketExtensionParser& operator=(const WebSocketExtensionParser&) = delete; ~WebSocketExtensionParser(); // Parses the given string as a Sec-WebSocket-Extensions header value. // // There must be no newline characters in the input. LWS-concatenation must // have already been done before calling this method. // // Returns true if the method was successful (no syntax error was found). bool Parse(const char* data, size_t size); bool Parse(const std::string& data) { return Parse(data.data(), data.size()); } // Returns the result of the last Parse() method call. const std::vector& extensions() const { return extensions_; } private: [[nodiscard]] bool Consume(char c); [[nodiscard]] bool ConsumeExtension(WebSocketExtension* extension); [[nodiscard]] bool ConsumeExtensionParameter( WebSocketExtension::Parameter* parameter); [[nodiscard]] bool ConsumeToken(base::StringPiece* token); [[nodiscard]] bool ConsumeQuotedToken(std::string* token); void ConsumeSpaces(); [[nodiscard]] bool Lookahead(char c); [[nodiscard]] bool ConsumeIfMatch(char c); // The current position in the input string. const char* current_; // The pointer of the end of the input string. const char* end_; std::vector extensions_; }; } // namespace net #endif // NET_WEBSOCKETS_WEBSOCKET_EXTENSION_PARSER_H_