174 lines
4.8 KiB
C++
174 lines
4.8 KiB
C++
// src/parse_http_request.cc
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// This file is part of libpbe; see http://anyterm.org/
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// (C) 2005-2008 Philip Endecott
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#include "parse_http_request.hh"
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#include <boost/spirit.hpp>
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#include <boost/spirit/actor/insert_at_actor.hpp>
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#include <boost/spirit/dynamic/if.hpp>
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#include <boost/spirit/utility/loops.hpp>
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#include <boost/spirit/iterator/multi_pass.hpp>
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#include <boost/lexical_cast.hpp>
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#include <boost/scoped_array.hpp>
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#include <map>
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using namespace std;
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using namespace boost::spirit;
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namespace pbe {
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HttpRequest parse_http_request(istream& strm)
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{
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HttpRequest request;
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typedef multi_pass<istreambuf_iterator<char> > iterator_t;
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typedef scanner<iterator_t> scanner_t;
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typedef rule<scanner_t> rule_t;
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string tmp_hn;
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string tmp_hv;
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// HTTP/1.1 request parsing, based on:
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// RFC2616
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// RFC2396
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// HTTP/1.1 Errata (http://skrb.org/ietf/http_errata.html)
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rule_t CRLF = str_p("\r\n");
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rule_t extension_method = nothing_p;
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rule_t method = str_p("OPTIONS") | "GET" | "HEAD" | "POST" | "PUT"
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| "DELETE" | "TRACE" | "CONNECT" | extension_method;
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rule_t mark = ch_p('-') | '_' | '.' | '!' | '~' | '*' | '\'' | '(' | ')';
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rule_t unreserved = alnum_p | mark;
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rule_t escaped = ch_p('%') >> xdigit_p >> xdigit_p;
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rule_t reserved = ch_p(';') | '/' | '?' | ':' | '@' | '&' | '=' | '+' | '$' | ',';
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rule_t pchar = unreserved | escaped | ':' | '@' | '&' | '=' | '+' | '$' | ',';
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rule_t param = *pchar;
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rule_t segment = *pchar >> *(';' >> param);
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rule_t path_segments = segment >> *('/' >> segment);
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rule_t abs_path = ( ch_p('/') >> path_segments )[assign_a(request.abs_path)];
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rule_t scheme = alpha_p >> *(alpha_p | digit_p | '+' | '-' | '.' );
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rule_t userinfo = *(unreserved | escaped | ';' | ':' | '&' | '=' | '+' | '$' | ',' );
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rule_t domainlabel = alnum_p | alnum_p >> *(alnum_p | '-') >> alnum_p;
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rule_t toplabel = alpha_p | alpha_p >> *(alnum_p | '-') >> alnum_p;
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rule_t hostname = *(domainlabel >> '.') >> toplabel >> !ch_p('.');
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uint_parser<unsigned,10,1,3> decimal_byte;
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rule_t ipv4address = decimal_byte >> '.' >> decimal_byte >> '.' >>
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decimal_byte >> '.' >> decimal_byte;
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rule_t host = hostname | ipv4address;
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rule_t port = uint_p;
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rule_t hostport = host >> !(':' >> port);
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rule_t server = !( !(userinfo >> '@') >> hostport );
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rule_t reg_name = +(unreserved | escaped | '$' | ',' | ';' | ':' | '@' |
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'&' | '=' | '+');
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rule_t authority = server | reg_name;
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rule_t net_path = str_p("//") >> authority >> !abs_path;
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rule_t uric = reserved | unreserved | escaped;
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rule_t query = (*uric) [assign_a(request.query)];
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rule_t hier_part = (net_path | abs_path) >> !('?' >> query);
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rule_t uric_no_slash = unreserved | escaped | ';' | '?' | ':' | '@' |
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'&' | '=' | '+' | '$' | ',';
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rule_t opaque_part = uric_no_slash >> *uric;
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rule_t absolute_uri = scheme >> ':' >> (hier_part | opaque_part);
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rule_t request_uri = ch_p('*')
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| absolute_uri
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| (abs_path >> !(ch_p('?') >> query))
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| authority;
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rule_t http_version = str_p("HTTP/") >> uint_p >> '.' >> uint_p;
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rule_t request_line =
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method [assign_a(request.method)]
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>> ' ' >> request_uri
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>> ' ' >> http_version [assign_a(request.http_version)]
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>> CRLF ;
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rule_t header_name = +(alnum_p|'-');
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rule_t header_value = *(print_p|' '|'\t');
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rule_t header = ( header_name [assign_a(tmp_hn)] >>
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':' >> *(ch_p(' ')) >> header_value [assign_a(tmp_hv)] )
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[insert_at_a(request.headers,tmp_hn,tmp_hv)];
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rule_t request_r =
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request_line
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>> *(header >> CRLF)
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>> CRLF;
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iterator_t first(make_multi_pass(std::istreambuf_iterator<char>(strm)));
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iterator_t last(make_multi_pass(std::istreambuf_iterator<char>()));
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scanner_t scanner(first,last);
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if (!request_r.parse(scanner)) {
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throw HttpRequestSyntaxError();
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}
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HttpRequest::headers_t::const_iterator i = request.headers.find("Content-Length");
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if (i==request.headers.end()) {
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return request;
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}
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size_t content_length = boost::lexical_cast<size_t>(i->second);
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boost::scoped_array<char> buf(new char[content_length]);
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strm.read(buf.get(),content_length);
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request.body = string(buf.get(),content_length);
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return request;
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}
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};
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