Server/src/server.cpp

   1 // vim: set noexpandtab tabstop=4 shiftwidth=4:
   2 //----------------------------------------------------------------------------
   3 //                                  PlaQui
   4 //----------------------------------------------------------------------------
   5 // This file is part of PlaQui.
   6 //
   7 // PlaQui is free software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the Free Software
   9 // Foundation; either version 2 of the License, or (at your option) any later
  10 // version.
  11 //
  12 // PlaQui is distributed in the hope that it will be useful, but WITHOUT ANY
  13 // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  14 // FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
  15 // details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with PlaQui; if not, write to the Free Software Foundation, Inc., 59 Temple
  19 // Place, Suite 330, Boston, MA  02111-1307  USA
  20 //----------------------------------------------------------------------------
  21 // Creado:  Sat Oct 18 18:18:36 2003
  22 // Autores: Leandro Lucarella <llucare@fi.uba.ar>
  23 //----------------------------------------------------------------------------
  24 //
  25 // $Id$
  26 //
  27
  28 #include "plaqui/server/server.h"
  29 #include "plaqui/server/connection.h"
  30 #include "plaqui/server/controlserver.h"
  31 #include <sigc++/class_slot.h>
  32 #include <glibmm/timer.h>
  33 #include <sstream>
  34 #include <exception>
  35 #ifdef DEBUG
  36 #       include "plaqui/server/string.h"
  37 #       include <iostream>
  38 #endif // DEBUG
  39
  40 using namespace std;
  41
  42 namespace PlaQui {
  43
  44 namespace Server {
  45
  46 Server::~Server(void) {
  47 #ifdef DEBUG
  48         cerr << __FILE__ << "(" << __LINE__ << ")"
  49                 <<  ": destructor." << endl;
  50 #endif // DEBUG
  51         // Mando a terminar todas las plantas.
  52         plants_mutex.lock();
  53         for (PlantList::iterator i = plants.begin(); i != plants.end(); i++) {
  54                 i->second->finish();
  55         }
  56         PlantList::size_type count = plants.size();
  57         plants_mutex.unlock();
  58         // Espero que terminen realmente.
  59         while (count) {
  60                 Glib::usleep(10000); // 10 milisegundos
  61                 plants_mutex.lock();
  62                 count = plants.size();
  63                 plants_mutex.unlock();
  64         }
  65 }
  66
  67 Server::Server(const string& plant_filename, const Connection::Port& port)
  68                 throw(sockerr): TCPServer(port) {
  69 #ifdef DEBUG
  70         cerr << __FILE__ << "(" << __LINE__ << ")"
  71                 <<  ": port = " << port << endl;
  72 #endif // DEBUG
  73         // FIXME - hacer que se puedan cargar mas plantas bien.
  74         Glib::Mutex::Lock lock(plants_mutex);
  75         plants["default"] = new Plant(plant_filename);
  76         plants["default"]->signal_finished().connect(
  77                         SigC::bind<const char*>(
  78                                 SigC::slot_class(*this, &Server::on_plant_finished),
  79                                 "default"));
  80         plants["default"]->run();
  81 }
  82
  83 Connection* Server::new_connection(const sockbuf::sockdesc& sd) {
  84 #ifdef DEBUG
  85         cerr << __FILE__ << "(" << __LINE__ << ")"
  86                 <<  ": new_connection(sd = " << sd.sock << ")"
  87                 << endl;
  88 #endif // DEBUG
  89         ControlServer* connection = new ControlServer(sd);
  90         // TODO verificar si el new se hace bien? no creo.
  91         connection->signal_command_received().connect(
  92                         SigC::bind<ControlServer*>(
  93                                 SigC::slot_class(*this, &Server::on_control_command_received),
  94                                 connection));
  95         // TODO:
  96         return connection;
  97 }
  98
  99 void Server::on_plant_finished(const char* plant) {
 100 #ifdef DEBUG
 101         cerr << __FILE__ << "(" << __LINE__ << ")"
 102                 <<  ": on_plant_finished(plant_name = " << plant << endl;
 103 #endif // DEBUG
 104         Glib::Mutex::Lock lock(plants_mutex);
 105         plants.erase(plant);
 106 }
 107
 108 /// \todo Terminar de implementar.
 109 void Server::on_control_command_received(const Command& command,
 110                 ControlServer* controlserver) {
 111 #ifdef DEBUG
 112         cerr << __FILE__ << "(" << __LINE__ << ")"
 113                 <<  ": on_control_command_received(target = "
 114                 << command.get_target() << ", command = " << command.get_command()
 115                 << ", args = [" << String::join(command.get_args(), ", ") << "])"
 116                 << endl;
 117 #endif // DEBUG
 118         HTTPResponse* response;
 119         //bool stop_controlserver = false;
 120         if (command.get_target() == "server") {
 121                 if (command.get_command() == "status") {
 122                         response = cmd_server_status();
 123                 } else if (command.get_command() == "stop") {
 124                         response = new HTTPResponse(HTTPMessage::OK,
 125                                         "<response desc=\"El server se apagará en instantes...\" />");
 126                         // XXX - Sin mandar la respuesta enseguida podría ser que el server
 127                         // cierre la conexión antes de mandar la respuesta.
 128                         //response->headers["Content-Type"] = "text/xml; charset=iso-8859-1";
 129                         //controlserver->send(*response);
 130                         //delete response;
 131                         finish();
 132                         //return;
 133                 } else {
 134                         response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 135                                         "<response desc=\"Invalid command for 'server' taget!\" />");
 136                 }
 137         } else if (command.get_target() == "connection") {
 138                 if (command.get_command() == "list") {
 139                         response = cmd_connection_list();
 140                 } else if (command.get_command() == "stop") {
 141                         response = cmd_connection_stop(command);
 142                 } else {
 143                         response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 144                                         "<response desc=\"Invalid command for 'connection' taget!\" />");
 145                 }
 146         } else if (command.get_target() == "transmission") {
 147                 if (command.get_command() == "list") {
 148                         response = cmd_transmission_list();
 149                 } else if (command.get_command() == "start") {
 150                         response = cmd_transmission_start(command);
 151                 } else if (command.get_command() == "stop") {
 152                         response = cmd_transmission_stop(command);
 153                 } else {
 154                         response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 155                                         "<response desc=\"Invalid command for 'transmission' taget!\" />");
 156                 }
 157         } else if (command.get_target() == "plant") {
 158                 if (command.get_command() == "list") {
 159                         response = cmd_plant_list();
 160                 } else if (command.get_command() == "get") {
 161                         response = cmd_plant_get(command);
 162                 } else if (command.get_command() == "set") {
 163                         response = cmd_plant_set(command);
 164                 } else if (command.get_command() == "stop") {
 165                         response = cmd_plant_stop(command);
 166                 } else {
 167                         response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 168                                         "<response desc=\"Invalid command for 'plant' taget!\" />");
 169                 }
 170         } else {
 171                 response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 172                                 "<response desc=\"Invalid taget!\" />");
 173         }
 174         // FIXME
 175         response->headers["Content-Type"] = "text/xml; charset=iso-8859-1";
 176         //response->headers["Connection"] = "close";
 177         controlserver->send(*response);
 178         delete response;
 179         // FIXME con timeout no debería ser necesario. Verificar cabecera Connection
 180         // para saber si hay que finish()earlo o no.
 181         //if (stop_controlserver) {
 182         //      controlserver->finish();
 183         //}
 184 }
 185
 186 HTTPResponse* Server::cmd_server_status(void) const {
 187         // FIXME
 188         stringstream xml;
 189         xml << "<serverstatus>" << endl;
 190         xml << "\t<version>" VERSION "</version>" << endl;
 191         xml << "\t<authors>" << endl;
 192         xml << "\t\t<author>Nicolás Dimov</author>" << endl;
 193         xml << "\t\t<author>Leandro Lucarella</author>" << endl;
 194         xml << "\t\t<author>Ricardo Markiewicz</author>" << endl;
 195         xml << "\t</authors>" << endl;
 196         xml << "</serverstatus>" << endl;
 197         return new HTTPResponse(HTTPMessage::OK, xml.str());
 198 }
 199
 200 HTTPResponse* Server::cmd_connection_list(void) {
 201         // FIXME
 202         TCPServer::ConnectionInfoList cil = get_connected();
 203         stringstream xml;
 204         xml << "<list type=\"connection\">" << endl;
 205         for (TCPServer::ConnectionInfoList::const_iterator i = cil.begin();
 206                         i != cil.end(); i++) {
 207                 xml << "\t<row>" << endl;
 208                 xml << "\t\t<cell>" << i->host << "</cell>" << endl;
 209                 xml << "\t\t<cell>" << i->port << "</cell>" << endl;
 210                 xml << "\t</row>" << endl;
 211         }
 212         xml << "</list>" << endl;
 213         return new HTTPResponse(HTTPMessage::OK, xml.str());
 214 }
 215
 216 HTTPResponse* Server::cmd_connection_stop(const Command& command) {
 217         const Command::Arguments& args = command.get_args();
 218         Connection::Port port;
 219         if (args.size() < 2) {
 220                 return new HTTPResponse(HTTPMessage::CONFLICT,
 221                                 "<response desc=\"Faltan argumentos.\" />");
 222         } else if (disconnect(args[0], to(args[1], port))) {
 223                 return new HTTPResponse(HTTPMessage::OK,
 224                                 string("<response desc=\"La conexión a ") + args[0] + ":" + args[1]
 225                                 + " se cerrará en instantes...\" />");
 226         } else {
 227                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 228                                 string("<response desc=\"No existe una conexión a ") + args[0]
 229                                 + ":" + args[1] + "\" />");
 230         }
 231 }
 232
 233 HTTPResponse* Server::cmd_transmission_list(void) {
 234         // FIXME
 235         stringstream xml;
 236         xml << "<list type=\"transmission\">" << endl;
 237 /*TODO  plants_mutex.lock();
 238         for (PlantList::const_iterator i = plants.begin();
 239                         i != plants.end(); i++) {
 240                 trans
 241                 xml << "       <li>" << (*i)->get_host() << ":"
 242                         << (*i)->get_port() << " [<a href=\"/transmission/stop/"
 243                         << (*i)->get_host() << "/" << (*i)->get_port()
 244                         << "\">desconectar</a>]</li>" << endl;
 245         }
 246         transmissions_mutex.unlock();*/
 247         xml << "</list>" << endl;
 248         return new HTTPResponse(HTTPMessage::OK, xml.str());
 249 }
 250
 251 HTTPResponse* Server::cmd_transmission_start(const Command& command) {
 252         const Command::Arguments& args = command.get_args();
 253         if (args.size() < 3) {
 254                 return new HTTPResponse(HTTPMessage::CONFLICT,
 255                                 "<response desc=\"Faltan argumentos.\" />");
 256         } else {
 257                 string plant = args[0];
 258                 string host = args[1];
 259                 Connection::Port port = to(args[2], port);
 260                 Glib::Mutex::Lock lock(plants_mutex);
 261                 PlantList::iterator p = plants.find(plant);
 262                 if (p == plants.end()) {
 263                         return new HTTPResponse(HTTPMessage::NOT_FOUND,
 264                                         string("<response desc=\"No existe la planta '") + plant + "'.\" />");
 265                 // TODO - agregar chequeo de que la transmision a ese host:port no
 266                 //        exista para otra planta?
 267                 } else if (plants[plant]->transmission_start(host, port)) {
 268                         return new HTTPResponse(HTTPMessage::OK,
 269                                         string("<response desc=\"Se empieza a transmitir la planta '") + plant
 270                                         + "' a " + host + ":" + String().from(port) + ".\" />");
 271                 } else {
 272                         return new HTTPResponse(HTTPMessage::INTERNAL_SERVER_ERROR,
 273                                         string("<response desc=\"Error al crear la transmisión a de la planta '")
 274                                         + plant + "' a " + host + ":" + args[2] + ".\" />");
 275                 }
 276         }
 277 }
 278
 279 HTTPResponse* Server::cmd_transmission_stop(const Command& command) {
 280         const Command::Arguments& args = command.get_args();
 281         if (args.size() < 2) {
 282                 return new HTTPResponse(HTTPMessage::CONFLICT,
 283                                 "<response desc=\"Faltan argumentos.\" />");
 284         } else {
 285                 const string& host = args[0];
 286                 Connection::Port port = to(args[1], port);
 287                 for (PlantList::iterator i = plants.begin(); i != plants.end(); i++) {
 288                         // TODO - agregar chequeo para saber si existe una conexion (para
 289                         // tirar error de que no hay conexion o de que no se pudo
 290                         // desconectar.
 291                         if (i->second->transmission_stop(host, port)) {
 292                                 return new HTTPResponse(HTTPMessage::OK,
 293                                                 string("<response desc=\"Se finaliza la transmisión de la planta '")
 294                                                 + i->first + "' a " + host + ":" + args[1] + ".\" />");
 295                         }
 296                 }
 297                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 298                                 string("<response desc=\"No se puede finalizar la transmisión a ")
 299                                 + host + ":" + args[1] + ".\" />");
 300         }
 301 }
 302
 303 HTTPResponse* Server::cmd_plant_list(void) {
 304         // FIXME
 305         stringstream xml;
 306         xml << "<list type=\"plant\">" << endl;
 307         plants_mutex.lock();
 308         for (PlantList::const_iterator i = plants.begin();
 309                         i != plants.end(); i++) {
 310                 xml << "\t<row>" << endl;
 311                 xml << "\t\t<cell>" << i->first << "</cell>" << endl;
 312                 xml << "\t</row>" << endl;
 313         }
 314         plants_mutex.unlock();
 315         xml << "</list>" << endl;
 316         return new HTTPResponse(HTTPMessage::OK, xml.str());
 317 }
 318
 319 HTTPResponse* Server::cmd_plant_get(const Command& command) {
 320         if (!command.get_args().size()) {
 321                 return new HTTPResponse(HTTPMessage::CONFLICT,
 322                                 "<response desc=\"Faltan argumentos.\" />");
 323         }
 324         Glib::Mutex::Lock lock(plants_mutex);
 325         string plant = command.get_args()[0];
 326         if (plants.find(plant) == plants.end()) {
 327                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 328                                 string("<response desc=\"No existe la planta ") + plant + "\" />");
 329         }
 330         // TODO try/catch?
 331         string xml = plants[plant]->get_xml();
 332         if (xml.length()) {
 333                 return new HTTPResponse(HTTPMessage::OK, xml);
 334         } else {
 335                 return new HTTPResponse(HTTPMessage::INTERNAL_SERVER_ERROR,
 336                                 ("<response desc=\"No se pudo obtener el XML de la planta ") + plant + "\" />");
 337         }
 338 }
 339
 340 HTTPResponse* Server::cmd_plant_set(const Command& command) {
 341         const Command::Arguments& args = command.get_args();
 342         if (args.size() < 4) {
 343                 return new HTTPResponse(HTTPMessage::CONFLICT,
 344                                 "<response desc=\"Faltan argumentos.\" />");
 345         }
 346         string plant = args[0];
 347         string element = args[1];
 348         string key = args[2];
 349         if (key != "open") {
 350                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 351                                 string("<response desc=\"La clave '") + key + "' es inválida.\" />");
 352         }
 353         string value = args[3];
 354         Glib::Mutex::Lock lock(plants_mutex);
 355         PlantList::iterator p = plants.find(plant);
 356         if (p == plants.end()) {
 357                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 358                                 string("<response desc=\"No existe la planta '") + plant + "'.\" />");
 359         }
 360         bool open = true;
 361         if ((value == "false") || (value == "0") || (value == "off")
 362                         || (value == "no")) {
 363                 open = false;
 364         }
 365         if (!plants[plant]->set_open(element, open)) {
 366                 return new HTTPResponse(HTTPMessage::CONFLICT,
 367                                 string("<response desc=\"No se pudo cambiar el estado del elemento '") + element + "'.\" />");
 368         }
 369         return new HTTPResponse(HTTPMessage::OK,
 370                         string("<response desc=\"Se cambió el estado del elemento '") + element + "'.\" />");
 371 }
 372
 373 HTTPResponse* Server::cmd_plant_stop(const Command& command) {
 374         if (!command.get_args().size()) {
 375                 return new HTTPResponse(HTTPMessage::CONFLICT,
 376                                 "<response desc=\"Faltan argumentos.\" />");
 377         }
 378         Glib::Mutex::Lock lock(plants_mutex);
 379         const string name = command.get_args()[0];
 380         if (plants.find(name) == plants.end()) {
 381                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 382                                 string("<response desc=\"No existe la planta ") + name + "\" />");
 383         }
 384         // TODO Ver si al frenar la planta se destruye (no deberia!!!)
 385         plants[name]->finish();
 386         return new HTTPResponse(HTTPMessage::OK,
 387                         string("<response desc=\"La planta '") + name + "' se cerrará en instantes...\" />");
 388 }
 389
 390 } // namespace Server
 391
 392 } // namespace PlaQui
 393