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/*
Copyright © 2015 Gluzskiy Alexandr (sss)
This file is part of Unknown Download Manager (UDM).
UDM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
UDM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with UDM. If not, see <http://www.gnu.org/licenses/>.
*/
#include "client_session.h"
#include <boost/bind.hpp>
#include <boost/log/trivial.hpp>
std::shared_ptr<char*> pack_data(const std::string &buf, int *size_)
{
BOOST_LOG_TRIVIAL(debug)<<__FILE__<<":"<<__LINE__<<"\t"<<__func__;
std::shared_ptr<char*> ptr = std::make_shared<char*>(new char[buf.length() + 4]);
int32_t size = buf.length();
*size_ = size + 4;
(*ptr)[3] = size & 0xff;
(*ptr)[2] = (size>>8) & 0xff;
(*ptr)[1] = (size>>16) & 0xff;
(*ptr)[0] = (size>>24) & 0xff;
char *fck = (*ptr)+4;
memcpy(fck, buf.data(), buf.length());
return ptr;
}
std::shared_ptr<char*> pack_msg(client_msg *msg, int *size_)
{
BOOST_LOG_TRIVIAL(debug)<<__FILE__<<":"<<__LINE__<<"\t"<<__func__;
BOOST_LOG_TRIVIAL(trace)<<"packing message:\n"<<msg->DebugString();
std::string msg_buf;
msg->SerializeToString(&msg_buf);
return pack_data(msg_buf, size_);
}
client_session::client_session(QObject *parent, boost::asio::io_service *io_service) : QObject(parent), io_service_(*io_service), socket_(*io_service)
{
}
tcp::socket& client_session::socket()
{
return socket_;
}
void client_session::client_connect(QString host, int port)
{
//TODO: settings for connection timeout
boost::asio::ip::tcp::resolver r(io_service_);
boost::asio::ip::tcp::endpoint ep;
ep.port(port);
ep.address(boost::asio::ip::address::from_string(host.toStdString()));
socket_.async_connect(ep, boost::bind(&client_session::handle_connect, this, boost::asio::placeholders::error));
}
void client_session::handle_connect(const boost::system::error_code &e)
{
BOOST_LOG_TRIVIAL(debug)<<__FILE__<<":"<<__LINE__<<"\t"<<typeid(this).name()<<"::"<<__func__;
if(e)
{
//TODO: settings for reconnect count and timeout
emit client_connected(false, QString::fromStdString(e.message()));
BOOST_LOG_TRIVIAL(error)<<__FILE__<<":"<<__LINE__<<"\t"<<typeid(this).name()<<"::"<<__func__<<"\terror: "<<e.message();
}
else
{
emit client_connected(true, QString::fromStdString(e.message()));
//listen for messages from server
recv_data_ = new char[4];
boost::asio::async_read(socket_, boost::asio::buffer(recv_data_, 4), boost::bind(&client_session::handle_read, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred));
}
}
void client_session::handle_read(const boost::system::error_code& error, size_t bytes_transferred)
{
if (!error)
{
std::string s;
// bool parsed = false;
unsigned size = ntohl(*(int32_t*)recv_data_);
delete [] recv_data_;
char *buf = new char[size];
boost::system::error_code ec;
socket_.read_some(boost::asio::buffer(buf, size), ec);
if(ec)
{
}
//TODO: check for error
s.append(buf, size);
delete [] buf;
if(size != s.length())
{
delete this;
return;
}
//TODO:
server_msg msg;
if(msg.ParseFromString(s))
{
//parsed = true;
emit server_message_received(msg); //at least one more copy ...., i hope messages will be always small
//another way:
//make signal work with pointer to server_msg
//allocate msg via new server_msg and pass pointer to signal
//check if someone connected to signal and delete message if noone
//this will be limited to only one client connection because client will need to delete message manually
recv_data_ = new char[4];
boost::asio::async_read(socket_, boost::asio::buffer(recv_data_, 4), boost::bind(&client_session::handle_read, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred));
}
// if(!parsed)
else
{
BOOST_LOG_TRIVIAL(error)<<"failed to parse client message";
delete this; //close connection
return;
}
}
else
{
delete this;
}
}
void client_session::send_message(client_msg &msg)
{
int size = 0;
std::shared_ptr<char*> ptr = pack_msg(&msg, &size);
boost::asio::async_write(socket_, boost::asio::buffer(*ptr, size), boost::bind(&client_session::handle_write, this, boost::asio::placeholders::error));
}
void client_session::handle_write(const boost::system::error_code& error)
{
if(error)
{
//TODO: handle error
}
}
void client_session::run_io_service()
{
io_service_.run();
}
/*boost::asio::io_service &client_session::io_service()
{
return io_service_;
} */
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