| // |
| // request_parser.hpp |
| // ~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2010 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| // |
| |
| #ifndef HTTP_SERVER4_REQUEST_PARSER_HPP |
| #define HTTP_SERVER4_REQUEST_PARSER_HPP |
| |
| #include <string> |
| #include <boost/logic/tribool.hpp> |
| #include <boost/tuple/tuple.hpp> |
| #include "coroutine.hpp" |
| |
| namespace http { |
| namespace server4 { |
| |
| struct request; |
| |
| /// Parser for incoming requests. |
| class request_parser : coroutine |
| { |
| public: |
| /// Parse some data. The tribool return value is true when a complete request |
| /// has been parsed, false if the data is invalid, indeterminate when more |
| /// data is required. The InputIterator return value indicates how much of the |
| /// input has been consumed. |
| template <typename InputIterator> |
| boost::tuple<boost::tribool, InputIterator> parse(request& req, |
| InputIterator begin, InputIterator end) |
| { |
| while (begin != end) |
| { |
| boost::tribool result = consume(req, *begin++); |
| if (result || !result) |
| return boost::make_tuple(result, begin); |
| } |
| boost::tribool result = boost::indeterminate; |
| return boost::make_tuple(result, begin); |
| } |
| |
| private: |
| /// The name of the content length header. |
| static std::string content_length_name_; |
| |
| /// Content length as decoded from headers. Defaults to 0. |
| std::size_t content_length_; |
| |
| /// Handle the next character of input. |
| boost::tribool consume(request& req, char input); |
| |
| /// Check if a byte is an HTTP character. |
| static bool is_char(int c); |
| |
| /// Check if a byte is an HTTP control character. |
| static bool is_ctl(int c); |
| |
| /// Check if a byte is defined as an HTTP tspecial character. |
| static bool is_tspecial(int c); |
| |
| /// Check if a byte is a digit. |
| static bool is_digit(int c); |
| |
| /// Check if two characters are equal, without regard to case. |
| static bool tolower_compare(char a, char b); |
| |
| /// Check whether the two request header names match. |
| bool headers_equal(const std::string& a, const std::string& b); |
| }; |
| |
| } // namespace server4 |
| } // namespace http |
| |
| #endif // HTTP_SERVER4_REQUEST_PARSER_HPP |