http_request_parser.hpp

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//
// http_request_parser.hpp
// ~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2011 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 CPP_WEB_SERVER_HTTP_REQUEST_PARSER_HPP
#define CPP_WEB_SERVER_HTTP_REQUEST_PARSER_HPP

#include "async_web_server_cpp/http_request.hpp"

#include <boost/logic/tribool.hpp>
#include <boost/tuple/tuple.hpp>

namespace async_web_server_cpp
{

class HttpRequestParser
{
public:
    HttpRequestParser();

    void reset();

    template<typename InputIterator>
    boost::tuple<boost::tribool, InputIterator>
    parse(HttpRequest& 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:
    boost::tribool consume(HttpRequest& req, char input);

    static bool is_char(int c);

    static bool is_ctl(int c);

    static bool is_tspecial(int c);

    static bool is_digit(int c);

    enum state
    {
        method_start,
        method,
        uri,
        http_version_h,
        http_version_t_1,
        http_version_t_2,
        http_version_p,
        http_version_slash,
        http_version_major_start,
        http_version_major,
        http_version_minor_start,
        http_version_minor,
        expecting_newline_1,
        header_line_start,
        header_lws,
        header_name,
        space_before_header_value,
        header_value,
        expecting_newline_2,
        expecting_newline_3
    } state_;
};

}  // namespace async_web_server_cpp

#endif