311 lines
8.6 KiB
C++
311 lines
8.6 KiB
C++
/*
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Copyright (c) 2015, Project OSRM, Dennis Luxen, others
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "RequestParser.h"
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#include "Http/Request.h"
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namespace http
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{
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RequestParser::RequestParser() : state_(method_start), header({"", ""}) {}
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void RequestParser::Reset() { state_ = method_start; }
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std::tuple<osrm::tribool, char *>
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RequestParser::Parse(Request &req, char *begin, char *end, http::CompressionType &compression_type)
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{
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while (begin != end)
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{
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osrm::tribool result = consume(req, *begin++, compression_type);
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if (result == osrm::tribool::yes || result == osrm::tribool::no)
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{
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return std::make_tuple(result, begin);
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}
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}
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osrm::tribool result = osrm::tribool::indeterminate;
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return std::make_tuple(result, begin);
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}
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osrm::tribool
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RequestParser::consume(Request &req, char input, http::CompressionType &compression_type)
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{
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switch (state_)
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{
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case method_start:
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if (!isChar(input) || isCTL(input) || isTSpecial(input))
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{
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return osrm::tribool::no;
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}
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state_ = method;
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return osrm::tribool::indeterminate;
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case method:
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if (input == ' ')
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{
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state_ = uri;
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return osrm::tribool::indeterminate;
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}
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if (!isChar(input) || isCTL(input) || isTSpecial(input))
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{
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return osrm::tribool::no;
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}
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return osrm::tribool::indeterminate;
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case uri_start:
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if (isCTL(input))
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{
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return osrm::tribool::no;
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}
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state_ = uri;
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req.uri.push_back(input);
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return osrm::tribool::indeterminate;
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case uri:
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if (input == ' ')
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{
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state_ = http_version_h;
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return osrm::tribool::indeterminate;
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}
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if (isCTL(input))
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{
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return osrm::tribool::no;
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}
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req.uri.push_back(input);
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return osrm::tribool::indeterminate;
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case http_version_h:
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if (input == 'H')
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{
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state_ = http_version_t_1;
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return osrm::tribool::indeterminate;
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}
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return osrm::tribool::no;
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case http_version_t_1:
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if (input == 'T')
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{
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state_ = http_version_t_2;
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return osrm::tribool::indeterminate;
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}
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return osrm::tribool::no;
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case http_version_t_2:
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if (input == 'T')
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{
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state_ = http_version_p;
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return osrm::tribool::indeterminate;
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}
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return osrm::tribool::no;
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case http_version_p:
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if (input == 'P')
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{
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state_ = http_version_slash;
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return osrm::tribool::indeterminate;
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}
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return osrm::tribool::no;
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case http_version_slash:
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if (input == '/')
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{
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state_ = http_version_major_start;
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return osrm::tribool::indeterminate;
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}
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return osrm::tribool::no;
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case http_version_major_start:
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if (isDigit(input))
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{
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state_ = http_version_major;
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return osrm::tribool::indeterminate;
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}
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return osrm::tribool::no;
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case http_version_major:
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if (input == '.')
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{
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state_ = http_version_minor_start;
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return osrm::tribool::indeterminate;
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}
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if (isDigit(input))
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{
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return osrm::tribool::indeterminate;
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}
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return osrm::tribool::no;
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case http_version_minor_start:
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if (isDigit(input))
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{
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state_ = http_version_minor;
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return osrm::tribool::indeterminate;
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}
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return osrm::tribool::no;
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case http_version_minor:
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if (input == '\r')
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{
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state_ = expecting_newline_1;
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return osrm::tribool::indeterminate;
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}
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if (isDigit(input))
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{
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return osrm::tribool::indeterminate;
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}
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return osrm::tribool::no;
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case expecting_newline_1:
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if (input == '\n')
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{
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state_ = header_line_start;
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return osrm::tribool::indeterminate;
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}
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return osrm::tribool::no;
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case header_line_start:
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if (header.name == "Accept-Encoding")
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{
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/* giving gzip precedence over deflate */
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if (header.value.find("deflate") != std::string::npos)
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{
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compression_type = deflateRFC1951;
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}
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if (header.value.find("gzip") != std::string::npos)
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{
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compression_type = gzipRFC1952;
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}
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}
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if ("Referer" == header.name)
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{
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req.referrer = header.value;
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}
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if ("User-Agent" == header.name)
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{
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req.agent = header.value;
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}
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if (input == '\r')
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{
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state_ = expecting_newline_3;
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return osrm::tribool::indeterminate;
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}
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if (!isChar(input) || isCTL(input) || isTSpecial(input))
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{
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return osrm::tribool::no;
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}
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state_ = header_name;
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header.Clear();
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header.name.push_back(input);
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return osrm::tribool::indeterminate;
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case header_lws:
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if (input == '\r')
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{
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state_ = expecting_newline_2;
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return osrm::tribool::indeterminate;
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}
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if (input == ' ' || input == '\t')
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{
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return osrm::tribool::indeterminate;
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}
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if (isCTL(input))
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{
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return osrm::tribool::no;
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}
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state_ = header_value;
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return osrm::tribool::indeterminate;
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case header_name:
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if (input == ':')
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{
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state_ = space_before_header_value;
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return osrm::tribool::indeterminate;
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}
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if (!isChar(input) || isCTL(input) || isTSpecial(input))
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{
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return osrm::tribool::no;
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}
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header.name.push_back(input);
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return osrm::tribool::indeterminate;
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case space_before_header_value:
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if (input == ' ')
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{
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state_ = header_value;
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return osrm::tribool::indeterminate;
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}
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return osrm::tribool::no;
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case header_value:
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if (input == '\r')
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{
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state_ = expecting_newline_2;
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return osrm::tribool::indeterminate;
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}
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if (isCTL(input))
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{
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return osrm::tribool::no;
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}
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header.value.push_back(input);
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return osrm::tribool::indeterminate;
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case expecting_newline_2:
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if (input == '\n')
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{
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state_ = header_line_start;
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return osrm::tribool::indeterminate;
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}
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return osrm::tribool::no;
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default: // expecting_newline_3
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return (input == '\n' ? osrm::tribool::yes : osrm::tribool::no);
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// default:
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// return osrm::tribool::no;
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}
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}
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inline bool RequestParser::isChar(int character) { return character >= 0 && character <= 127; }
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inline bool RequestParser::isCTL(int character)
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{
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return (character >= 0 && character <= 31) || (character == 127);
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}
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inline bool RequestParser::isTSpecial(int character)
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{
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switch (character)
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{
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case '(':
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case ')':
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case '<':
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case '>':
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case '@':
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case ',':
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case ';':
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case ':':
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case '\\':
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case '"':
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case '/':
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case '[':
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case ']':
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case '?':
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case '=':
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case '{':
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case '}':
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case ' ':
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case '\t':
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return true;
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default:
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return false;
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}
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}
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inline bool RequestParser::isDigit(int character) { return character >= '0' && character <= '9'; }
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}
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