libt2n: (gerd) small fixes, hello unit tests

[libt2n] / src / command_client.cpp

/***************************************************************************
 *   Copyright (C) 2006 by Gerd v. Egidy                                   *
 *   gve@intra2net.com                                                     *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU Lesser General Public License version   *
 *   2.1 as published by the Free Software Foundation.                     *
 *                                                                         *
 *   This library 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 Lesser General Public License for more details.                   *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this program; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#include <string>
#include <sstream>

#include <boost/archive/binary_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/archive/xml_oarchive.hpp>
#include <boost/archive/xml_iarchive.hpp>
#include <boost/serialization/serialization.hpp>

#include <boost/bind.hpp>

#include "command_client.hxx"

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

using namespace std;

namespace libt2n
{

command_client::command_client(client_connection& _c)
    : c(_c)
{
    // for reconnects
    c.add_callback(new_connection,bind(&command_client::read_hello, boost::ref(*this)));

    read_hello();
}

void command_client::read_hello()
{
    // TODO: fix timeout
    string resultpacket;
    while(!c.get_packet(resultpacket) && !c.is_closed())
        c.fill_buffer();

    istringstream hello(resultpacket);

    char chk[5];
    hello.read(chk,4);
    chk[4]=0;
    if (hello.fail() || hello.eof() || string("T2Nv") != chk)
        throw t2n_version_mismatch("illegal hello received (T2N)");

    int prot_version;
    hello >> prot_version;
    if (hello.fail() || hello.eof() || prot_version != PROTOCOL_VERSION)
        throw t2n_version_mismatch("not compatible with the server protocol version");

    hello.read(chk,1);
    if (hello.fail() || hello.eof() || chk[0] != ';')
        throw t2n_version_mismatch("illegal hello received (1. ;)");

    hello.read(chk,4);
    if (hello.fail() || hello.eof() || *((int*)chk) != 1)
        throw t2n_version_mismatch("host byte order not matching");

    hello.read(chk,1);
    if (hello.fail() || hello.eof() || chk[0] != ';')
        throw t2n_version_mismatch("illegal hello received (2. ;)");
}

void command_client::send_command(command* cmd, result_container &res)
{
    ostringstream ofs;
    command_container cc(cmd);
    boost::archive::binary_oarchive oa(ofs);

    // TODO: exceptions
    oa << cc;

    std::ostream* ostr;
    if ((ostr=c.get_logstream(fulldebug))!=NULL)
    {
        (*ostr) << "sending command, decoded data: " << std::endl;
        boost::archive::xml_oarchive xo(*ostr);
        xo << BOOST_SERIALIZATION_NVP(cc);
    }

    c.write(ofs.str());

    // TODO: fix timeout
    string resultpacket;
    while(!c.get_packet(resultpacket))
        c.fill_buffer();

    istringstream ifs(resultpacket);
    boost::archive::binary_iarchive ia(ifs);

    // TODO: exceptions
    ia >> res;

    if ((ostr=c.get_logstream(fulldebug))!=NULL)
    {
        (*ostr) << "received result, decoded data: " << std::endl;
        boost::archive::xml_oarchive xo(*ostr);
        xo << BOOST_SERIALIZATION_NVP(res);
    }
}

}