developer.intra2net.com Git - libt2n/blob - src/command_client.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
  23 #include <boost/archive/binary_oarchive.hpp>
  24 #include <boost/archive/binary_iarchive.hpp>
  25 #include <boost/archive/xml_oarchive.hpp>
  26 #include <boost/archive/xml_iarchive.hpp>
  27 #include <boost/serialization/serialization.hpp>
  28
  29 #include <boost/bind.hpp>
  30
  31 #include "command_client.hxx"
  32
  33 #ifdef HAVE_CONFIG_H
  34 #include <config.h>
  35 #endif
  36
  37 using namespace std;
  38
  39 namespace libt2n
  40 {
  41
  42 command_client::command_client(client_connection& _c, long long _command_timeout_usec, long long _hello_timeout_usec)
  43     : c(_c)
  44 {
  45     command_timeout_usec=_command_timeout_usec;
  46     hello_timeout_usec=_hello_timeout_usec;
  47
  48     // for reconnects
  49     c.add_callback(new_connection,bind(&command_client::read_hello, boost::ref(*this)));
  50
  51     read_hello();
  52 }
  53
  54 std::string command_client::read_packet(const long long &usec_timeout)
  55 {
  56     string resultpacket;
  57     bool got_packet=false;
  58     long long my_timeout=usec_timeout;
  59     while(!(got_packet=c.get_packet(resultpacket)) && my_timeout > 0  && !c.is_closed())
  60         c.fill_buffer(my_timeout,&my_timeout);
  61
  62     if (!got_packet)
  63         throw t2n_transfer_error("timeout exceeded");
  64
  65     return resultpacket;
  66 }
  67
  68 void command_client::read_hello()
  69 {
  70     istringstream hello(read_packet(hello_timeout_usec));
  71
  72     char chk[5];
  73     hello.read(chk,4);
  74     chk[4]=0;
  75     if (hello.fail() || hello.eof() || string("T2Nv") != chk)
  76         throw t2n_version_mismatch("illegal hello received (T2N)");
  77
  78     int prot_version;
  79     hello >> prot_version;
  80     if (hello.fail() || hello.eof() || prot_version != PROTOCOL_VERSION)
  81         throw t2n_version_mismatch("not compatible with the server protocol version");
  82
  83     hello.read(chk,1);
  84     if (hello.fail() || hello.eof() || chk[0] != ';')
  85         throw t2n_version_mismatch("illegal hello received (1. ;)");
  86
  87     hello.read(chk,4);
  88     if (hello.fail() || hello.eof() || *((int*)chk) != 1)
  89         throw t2n_version_mismatch("host byte order not matching");
  90
  91     hello.read(chk,1);
  92     if (hello.fail() || hello.eof() || chk[0] != ';')
  93         throw t2n_version_mismatch("illegal hello received (2. ;)");
  94 }
  95
  96 void command_client::send_command(command* cmd, result_container &res)
  97 {
  98     ostringstream ofs;
  99     command_container cc(cmd);
 100     boost::archive::binary_oarchive oa(ofs);
 101
 102     try
 103     {
 104         oa << cc;
 105     }
 106     catch(boost::archive::archive_exception &e)
 107     {
 108         ostringstream msg;
 109         msg << "archive_exception while serializing on client-side, code " << e.code << " (" << e.what() << ")";
 110         throw t2n_serialization_error(msg.str());
 111     }
 112     catch(...)
 113         { throw; }
 114
 115     std::ostream* ostr;
 116     if ((ostr=c.get_logstream(fulldebug))!=NULL)
 117     {
 118         (*ostr) << "sending command, decoded data: " << std::endl;
 119         boost::archive::xml_oarchive xo(*ostr);
 120         xo << BOOST_SERIALIZATION_NVP(cc);
 121     }
 122
 123     c.write(ofs.str());
 124
 125     istringstream ifs(read_packet(command_timeout_usec));
 126     boost::archive::binary_iarchive ia(ifs);
 127
 128     try
 129     {
 130         ia >> res;
 131     }
 132     catch(boost::archive::archive_exception &e)
 133     {
 134         ostringstream msg;
 135         msg << "archive_exception while deserializing on client-side, code " << e.code << " (" << e.what() << ")";
 136         throw t2n_serialization_error(msg.str());
 137     }
 138     catch(...)
 139         { throw; }
 140
 141     if ((ostr=c.get_logstream(fulldebug))!=NULL)
 142     {
 143         (*ostr) << "received result, decoded data: " << std::endl;
 144         boost::archive::xml_oarchive xo(*ostr);
 145         xo << BOOST_SERIALIZATION_NVP(res);
 146     }
 147 }
 148
 149 }