1 /***************************************************************************
2 * Copyright (C) 2006 by Gerd v. Egidy *
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. *
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. *
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 ***************************************************************************/
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>
29 #include <boost/bind.hpp>
31 #include "command_client.hxx"
42 command_client::command_client(client_connection* _c, long long _command_timeout_usec, long long _hello_timeout_usec)
45 command_timeout_usec=_command_timeout_usec;
46 hello_timeout_usec=_hello_timeout_usec;
49 c->add_callback(new_connection,bind(&command_client::read_hello, boost::ref(*this)));
51 // don't expect hello from an always closed connection (like dummy_client_connection)
56 /** @brief replace the connection currently in use with a new one
58 @param _c pointer to the new connection
60 @note the old connection must still be valid when this method is called,
61 it can safely be deleted after this method returned
63 @note all callbacks registered on the old connection will be copied over
66 void command_client::replace_connection(client_connection* _c)
68 // copy all callbacks registered on the old connection
69 for(callback_event_type e=static_cast<callback_event_type>(0);
71 e=static_cast<callback_event_type>(static_cast<int>(e)+1))
73 list<boost::function<void ()> > evcb=c->get_callback_list(e);
75 for (list<boost::function<void ()> >::iterator i=evcb.begin(); i != evcb.end(); i++)
76 _c->add_callback(e,*i);
79 // replace the connection
85 std::string command_client::read_packet(const long long &usec_timeout)
88 bool got_packet=false;
89 long long my_timeout=usec_timeout;
90 while(!(got_packet=c->get_packet(resultpacket)) && my_timeout > 0 && !c->is_closed())
91 c->fill_buffer(my_timeout,&my_timeout);
94 throw t2n_transfer_error("timeout exceeded");
99 void command_client::read_hello()
102 bool got_packet=false;
103 long long my_timeout=hello_timeout_usec;
104 while(!(got_packet=c->get_packet(resultpacket)) && my_timeout > 0 && !c->is_closed())
106 c->fill_buffer(my_timeout,&my_timeout);
108 c->peek_packet(resultpacket);
109 check_hello(resultpacket); // will throw before timeout if wrong data received
113 throw t2n_transfer_error("timeout exceeded");
115 if (!check_hello(resultpacket))
116 throw t2n_version_mismatch("illegal hello received (incomplete): "+resultpacket);
119 bool command_client::check_hello(const string& hellostr)
121 istringstream hello(hellostr);
125 if (hello.read(&chk,1))
128 throw t2n_version_mismatch("illegal hello received (T2N)");
133 if (hello.read(&chk,1))
136 throw t2n_version_mismatch("illegal hello received (T2N)");
141 if (hello.read(&chk,1))
144 throw t2n_version_mismatch("illegal hello received (T2N)");
149 if (hello.read(&chk,1))
152 throw t2n_version_mismatch("illegal hello received (T2N)");
158 if (hello >> prot_version)
160 if (prot_version != PROTOCOL_VERSION)
161 throw t2n_version_mismatch("not compatible with the server protocol version");
166 if (hello.read(&chk,1))
169 throw t2n_version_mismatch("illegal hello received (1. ;)");
175 if (hello.read((char*)&hbo,sizeof(hbo)))
178 throw t2n_version_mismatch("host byte order not matching");
183 if (hello.read(&chk,1))
186 throw t2n_version_mismatch("illegal hello received (2. ;)");
194 void command_client::send_command(command* cmd, result_container &res)
197 command_container cc(cmd);
198 boost::archive::binary_oarchive oa(ofs);
204 catch(boost::archive::archive_exception &e)
207 msg << "archive_exception while serializing on client-side, code " << e.code << " (" << e.what() << ")";
208 throw t2n_serialization_error(msg.str());
214 if ((ostr=c->get_logstream(fulldebug))!=NULL)
216 (*ostr) << "sending command, decoded data: " << std::endl;
217 boost::archive::xml_oarchive xo(*ostr);
218 xo << BOOST_SERIALIZATION_NVP(cc);
223 istringstream ifs(read_packet(command_timeout_usec));
224 boost::archive::binary_iarchive ia(ifs);
230 catch(boost::archive::archive_exception &e)
233 msg << "archive_exception while deserializing on client-side, code " << e.code << " (" << e.what() << ")";
234 throw t2n_serialization_error(msg.str());
239 if ((ostr=c->get_logstream(fulldebug))!=NULL)
241 (*ostr) << "received result, decoded data: " << std::endl;
242 boost::archive::xml_oarchive xo(*ostr);
243 xo << BOOST_SERIALIZATION_NVP(res);