developer.intra2net.com Git - libt2n/blob - src/command_server.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Gerd v. Egidy                                   *
   3  *   gve@intra2net.com                                                     *
   4  *                                                                         *
   5  *   This library is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU Lesser General Public License version   *
   7  *   2.1 as published by the Free Software Foundation.                     *
   8  *                                                                         *
   9  *   This library is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU Lesser General Public License for more details.                   *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU Lesser General Public      *
  15  *   License along with this program; if not, write to the                 *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  18  ***************************************************************************/
  19
  20 #include <string>
  21 #include <sstream>
  22 #include <stdexcept>
  23 #include <iostream>
  24
  25 #include <boost/archive/binary_oarchive.hpp>
  26 #include <boost/archive/binary_iarchive.hpp>
  27 #include <boost/archive/xml_oarchive.hpp>
  28 #include <boost/archive/xml_iarchive.hpp>
  29 #include <boost/serialization/serialization.hpp>
  30
  31 #include <boost/bind.hpp>
  32
  33 #include "command_server.hxx"
  34 #include "container.hxx"
  35 #include "log.hxx"
  36
  37 #ifdef HAVE_CONFIG_H
  38 #include <config.h>
  39 #endif
  40
  41 using namespace std;
  42
  43 namespace libt2n
  44 {
  45
  46 command_server::command_server(server& _s)
  47     : s(_s)
  48 {
  49     // register callback
  50     s.add_callback(new_connection,bind(&command_server::send_hello, boost::ref(*this), _1));
  51 }
  52
  53 void command_server::send_hello(unsigned int conn_id)
  54 {
  55     server_connection* sc=s.get_connection(conn_id);
  56
  57     ostringstream hello;
  58
  59     hello << "T2Nv" << PROTOCOL_VERSION << ';';
  60
  61     int byteordercheck=1;
  62     hello.write((char*)&byteordercheck,sizeof(byteordercheck));
  63
  64     hello << ';';
  65
  66     sc->write(hello.str());
  67 }
  68
  69 /// handle a command including deserialization and answering
  70 void command_server::handle_packet(const std::string& packet, server_connection* conn)
  71 {
  72     OBJLOGSTREAM(s,debug,"handling packet from connection " << conn->get_id());
  73
  74     // deserialize packet
  75     istringstream ifs(packet);
  76     boost::archive::binary_iarchive ia(ifs);
  77     command_container ccont;
  78
  79     // TODO: catch
  80     ia >> ccont;
  81
  82     std::ostream* ostr;
  83     if ((ostr=s.get_logstream(fulldebug))!=NULL)
  84     {
  85         (*ostr) << "decoded packet data: " << std::endl;
  86         boost::archive::xml_oarchive xo(*ostr);
  87         xo << BOOST_SERIALIZATION_NVP(ccont);
  88     }
  89
  90     // TODO: cast to command subclass (template)
  91     command *cmd=ccont.get_command();
  92
  93     result_container res;
  94
  95     if (cmd)
  96     {
  97         try
  98         {
  99             res.set_result((*cmd)());
 100         }
 101         catch (t2n_exception &e)
 102             { res.set_exception(e.clone()); }
 103         catch (...)
 104             { throw; }
 105     }
 106     else
 107         throw logic_error("uninitialized command called");
 108
 109     ostringstream ofs;
 110     boost::archive::binary_oarchive oa(ofs);
 111
 112     // TODO: catch
 113     oa << res;
 114
 115     if ((ostr=s.get_logstream(fulldebug))!=NULL)
 116     {
 117         (*ostr) << "returning result, decoded data: " << std::endl;
 118         boost::archive::xml_oarchive xo(*ostr);
 119         xo << BOOST_SERIALIZATION_NVP(res);
 120     }
 121
 122     conn->write(ofs.str());
 123 }
 124
 125 /** @brief handle incoming commands
 126     @param usec_timeout wait until new data is found, max timeout usecs.
 127             -1: wait endless, 0: no timeout
 128 */
 129 void command_server::handle(long long usec_timeout)
 130 {
 131     if (s.fill_buffer(usec_timeout))
 132     {
 133         string packet;
 134         unsigned int conn_id;
 135
 136         while (s.get_packet(packet,conn_id))
 137             handle_packet(packet,s.get_connection(conn_id));
 138     }
 139     s.cleanup();
 140 }
 141
 142 }