request_parser.hpp

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//
// request_parser.hpp
// ~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2012 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_REQUEST_PARSER_HPP
#define HTTP_REQUEST_PARSER_HPP

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

class HttpRequest;

class HttpRequestParser
{
public:
    HttpRequestParser();

    void reset();

    template <typename InputIterator>
    boost::tuple<boost::tribool, InputIterator> parse ( shared_ptr<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 ( shared_ptr<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_;
};


#endif // HTTP_REQUEST_PARSER_HPP