forked from premiere/premiere-libtorrent
182 lines
6.1 KiB
C++
182 lines
6.1 KiB
C++
/*
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Copyright (c) 2008-2014, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_HTTP_PARSER_HPP_INCLUDED
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#define TORRENT_HTTP_PARSER_HPP_INCLUDED
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#include <map>
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#include <string>
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#include <utility>
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#include <vector>
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#ifdef _MSC_VER
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#pragma warning(push, 1)
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#endif
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#include <boost/cstdint.hpp>
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#include <boost/tuple/tuple.hpp>
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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#include "libtorrent/config.hpp"
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#include "libtorrent/buffer.hpp"
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#include "libtorrent/size_type.hpp"
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namespace libtorrent
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{
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// return true if the status code is 200, 206, or in the 300-400 range
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bool is_ok_status(int http_status);
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// return true if the status code is a redirect
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bool is_redirect(int http_status);
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TORRENT_EXTRA_EXPORT std::string resolve_redirect_location(std::string referrer
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, std::string location);
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class TORRENT_EXTRA_EXPORT http_parser
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{
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public:
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enum flags_t { dont_parse_chunks = 1 };
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http_parser(int flags = 0);
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~http_parser();
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std::string const& header(char const* key) const
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{
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static std::string empty;
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std::multimap<std::string, std::string>::const_iterator i
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= m_header.find(key);
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if (i == m_header.end()) return empty;
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return i->second;
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}
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std::string const& protocol() const { return m_protocol; }
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int status_code() const { return m_status_code; }
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std::string const& method() const { return m_method; }
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std::string const& path() const { return m_path; }
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std::string const& message() const { return m_server_message; }
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buffer::const_interval get_body() const;
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bool header_finished() const { return m_state == read_body; }
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bool finished() const { return m_finished; }
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boost::tuple<int, int> incoming(buffer::const_interval recv_buffer
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, bool& error);
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int body_start() const { return m_body_start_pos; }
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size_type content_length() const { return m_content_length; }
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std::pair<size_type, size_type> content_range() const
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{ return std::make_pair(m_range_start, m_range_end); }
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// returns true if this response is using chunked encoding.
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// in this case the body is split up into chunks. You need
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// to call parse_chunk_header() for each chunk, starting with
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// the start of the body.
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bool chunked_encoding() const { return m_chunked_encoding; }
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// removes the chunk headers from the supplied buffer. The buffer
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// must be the stream received from the http server this parser
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// instanced parsed. It will use the internal chunk list to determine
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// where the chunks are in the buffer. It returns the new length of
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// the buffer
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int collapse_chunk_headers(char* buffer, int size) const;
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// returns false if the buffer doesn't contain a complete
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// chunk header. In this case, call the function again with
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// a bigger buffer once more bytes have been received.
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// chunk_size is filled in with the number of bytes in the
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// chunk that follows. 0 means the response terminated. In
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// this case there might be additional headers in the parser
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// object.
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// header_size is filled in with the number of bytes the header
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// itself was. Skip this number of bytes to get to the actual
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// chunk data.
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// if the function returns false, the chunk size and header
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// size may still have been modified, but their values are
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// undefined
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bool parse_chunk_header(buffer::const_interval buf
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, size_type* chunk_size, int* header_size);
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// reset the whole state and start over
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void reset();
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bool connection_close() const { return m_connection_close; }
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std::multimap<std::string, std::string> const& headers() const { return m_header; }
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std::vector<std::pair<size_type, size_type> > const& chunks() const { return m_chunked_ranges; }
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private:
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size_type m_recv_pos;
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std::string m_method;
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std::string m_path;
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std::string m_protocol;
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std::string m_server_message;
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size_type m_content_length;
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size_type m_range_start;
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size_type m_range_end;
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std::multimap<std::string, std::string> m_header;
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buffer::const_interval m_recv_buffer;
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// contains offsets of the first and one-past-end of
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// each chunked range in the response
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std::vector<std::pair<size_type, size_type> > m_chunked_ranges;
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// while reading a chunk, this is the offset where the
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// current chunk will end (it refers to the first character
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// in the chunk tail header or the next chunk header)
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size_type m_cur_chunk_end;
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int m_status_code;
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// the sum of all chunk headers read so far
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int m_chunk_header_size;
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int m_partial_chunk_header;
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// controls some behaviors of the parser
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int m_flags;
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int m_body_start_pos;
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enum { read_status, read_header, read_body, error_state } m_state;
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// this is true if the server is HTTP/1.0 or
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// if it sent "connection: close"
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bool m_connection_close;
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bool m_chunked_encoding;
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bool m_finished;
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};
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}
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#endif // TORRENT_HTTP_PARSER_HPP_INCLUDED
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