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/bind.hpp>
31 server_connection::server_connection(int _timeout)
34 set_timeout(_timeout);
40 /// get pointer to logging stream, returns NULL if no logging needed
41 std::ostream* server_connection::get_logstream(log_level_values level)
43 if (my_server != NULL)
45 std::ostream* ostr=my_server->get_logstream(level);
47 (*ostr) << "connection " << get_id() << ": ";
54 /// check if timeout is expired, close connection if so
55 void server_connection::check_timeout()
57 if (timeout != -1 && last_action_time+timeout < time(NULL))
59 LOGSTREAM(debug,"timeout on connection " << connection_id << ", closing");
64 /// reset the timeout, e.g. if something is received
65 void server_connection::reset_timeout()
67 last_action_time=time(NULL);
70 void server_connection::add_callback(callback_event_type event, const boost::function<void ()>& func)
72 if (event == new_connection)
73 throw std::logic_error("new_connection callback not allowed for server_connections");
75 connection::add_callback(event,func);
79 : callbacks(__events_end)
81 set_default_timeout(30);
82 set_logging(NULL,none);
88 std::map<unsigned int, server_connection*>::iterator ie=connections.end();
89 for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++)
93 /** @brief add a callback
95 @param event event the function will be called at
96 @param func functor (see boost function) that will be called
98 @note use boost::bind to bind to member functions like this:
99 s.add_callback(new_connection,bind(&my_class::func_to_call_back, boost::ref(*this), _1));
101 void server::add_callback(callback_event_type event, const boost::function<void (unsigned int)>& func)
103 callbacks[event].push_back(func);
105 // add callback to all existing connections
106 if (event != new_connection)
108 std::map<unsigned int, server_connection*>::iterator ie=connections.end();
109 for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++)
110 i->second->add_callback(event,bind(func, i->first));
114 void server::do_callbacks(callback_event_type event, unsigned int conn_id)
116 std::list<boost::function<void (unsigned int)> >::iterator i,ie=callbacks[event].end();
117 for (i=callbacks[event].begin(); i != ie; i++)
121 int server::add_connection(server_connection* newconn)
123 unsigned int cid=next_id++;
124 newconn->set_id(cid);
125 newconn->set_server(this);
126 connections[cid]=newconn;
129 for(int e=connection_closed; e != __events_end; e++)
131 std::list<boost::function<void (unsigned int)> >::iterator i,ie=callbacks[e].end();
132 for (i=callbacks[e].begin(); i != ie; i++)
133 newconn->add_callback(static_cast<callback_event_type>(e),bind(*i,cid));
136 LOGSTREAM(debug,"new connection accepted, id: " << cid);
138 do_callbacks(new_connection,cid);
143 /// activate logging to the given stream. everything above the given level is logged.
144 void server::set_logging(std::ostream *_logstream, log_level_values _log_level)
146 log_level=_log_level;
147 logstream=_logstream;
151 @brief Gets a connection by id
153 @param conn_id Connection ID
155 @retval Pointer to connection object
157 server_connection* server::get_connection(unsigned int conn_id)
159 std::map<unsigned int, server_connection*>::iterator p=connections.find(conn_id);
160 if (p==connections.end())
166 /// check for timeouts, remove closed connections. don't forget to call this from time to time.
167 void server::cleanup()
169 std::map<unsigned int, server_connection*>::iterator ie=connections.end();
170 for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++)
171 i->second->check_timeout();
173 for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie;)
175 if (i->second->is_closed() && !i->second->packet_available())
177 // closed and no usable data in buffer -> remove
178 LOGSTREAM(debug,"removing connection " << i->first << " because it is closed and no more data waiting");
181 connections.erase(i);
182 i=connections.begin();
183 ie=connections.end();
190 /** @brief get a complete data packet from any client. The packet is removed from the
192 @param[out] data the data package
193 @param[out] conn_id the connection id we got this packet from
194 @retval true if packet found
196 bool server::get_packet(std::string& data, unsigned int& conn_id)
198 // todo: this is somehow unfair: the first connections in the map get checked more
199 // often than the others and can thus block them out
201 std::map<unsigned int, server_connection*>::iterator ie=connections.end();
202 for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++)
203 if (i->second->get_packet(data))
205 LOGSTREAM(debug,"got packet (" << data.size() << " bytes) from connection " << i->first);
214 /// get pointer to logging stream, returns NULL if no logging needed
215 std::ostream* server::get_logstream(log_level_values level)
217 if (logstream && log_level >= level)