152 lines
5.0 KiB
C++
152 lines
5.0 KiB
C++
/*
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open source routing machine
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Copyright (C) Dennis Luxen, others 2010
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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 AFFERO General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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any later version.
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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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You should have received a copy of the GNU Affero 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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or see http://www.gnu.org/licenses/agpl.txt.
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*/
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#ifndef HTTP_SERVER3_CONNECTION_HPP
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#define HTTP_CONNECTION_HPP
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#include <vector>
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#include <boost/asio.hpp>
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#include <boost/array.hpp>
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#include <boost/bind.hpp>
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#include <boost/noncopyable.hpp>
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#include <boost/shared_ptr.hpp>
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#include <boost/enable_shared_from_this.hpp>
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#include "reply.h"
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#include "request.h"
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#include "request_handler.h"
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#include "request_parser.h"
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namespace http {
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/// Represents a single connection from a client.
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template<typename GraphT>
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class connection
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: public boost::enable_shared_from_this<connection<GraphT> >,
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private boost::noncopyable
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{
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public:
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/// Construct a connection with the given io_service.
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explicit connection(boost::asio::io_service& io_service,
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request_handler<GraphT>& handler)
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: strand_(io_service),
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socket_(io_service),
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request_handler_(handler)
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{
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}
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/// Get the socket associated with the connection.
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boost::asio::ip::tcp::socket& socket()
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{
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return socket_;
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}
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/// Start the first asynchronous operation for the connection.
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void start()
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{
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socket_.async_read_some(boost::asio::buffer(buffer_),
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strand_.wrap(
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boost::bind(&connection<GraphT>::handle_read, this->shared_from_this(),
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boost::asio::placeholders::error,
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boost::asio::placeholders::bytes_transferred)));
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}
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private:
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/// Handle completion of a read operation.
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void handle_read(const boost::system::error_code& e,
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std::size_t bytes_transferred)
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{
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if (!e)
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{
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boost::tribool result;
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boost::tie(result, boost::tuples::ignore) = request_parser_.parse(
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request_, buffer_.data(), buffer_.data() + bytes_transferred);
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if (result)
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{
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request_handler_.handle_request(request_, reply_);
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boost::asio::async_write(socket_, reply_.to_buffers(),
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strand_.wrap(
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boost::bind(&connection<GraphT>::handle_write, this->shared_from_this(),
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boost::asio::placeholders::error)));
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}
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else if (!result)
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{
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reply_ = reply::stock_reply(reply::bad_request);
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boost::asio::async_write(socket_, reply_.to_buffers(),
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strand_.wrap(
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boost::bind(&connection<GraphT>::handle_write, this->shared_from_this(),
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boost::asio::placeholders::error)));
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}
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else
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{
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socket_.async_read_some(boost::asio::buffer(buffer_),
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strand_.wrap(
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boost::bind(&connection<GraphT>::handle_read, this->shared_from_this(),
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boost::asio::placeholders::error,
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boost::asio::placeholders::bytes_transferred)));
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}
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}
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}
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/// Handle completion of a write operation.
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void handle_write(const boost::system::error_code& e)
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{
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if (!e)
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{
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// Initiate graceful connection closure.
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boost::system::error_code ignored_ec;
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socket_.shutdown(boost::asio::ip::tcp::socket::shutdown_both, ignored_ec);
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}
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// No new asynchronous operations are started. This means that all shared_ptr
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// references to the connection object will disappear and the object will be
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// destroyed automatically after this handler returns. The connection class's
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// destructor closes the socket.
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}
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/// Strand to ensure the connection's handlers are not called concurrently.
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boost::asio::io_service::strand strand_;
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/// Socket for the connection.
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boost::asio::ip::tcp::socket socket_;
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/// The handler used to process the incoming request.
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request_handler<GraphT>& request_handler_;
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/// Buffer for incoming data.
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boost::array<char, 8192> buffer_;
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/// The incoming request.
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Request request_;
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/// The parser for the incoming request.
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request_parser request_parser_;
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/// The reply to be sent back to the client.
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reply reply_;
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};
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} // namespace http
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#endif /* CONNECTION_HPP_ */
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