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(SigC::bind(
  77                         SigC::slot_class(*this, &Server::on_plant_finished),
  78                         "default"));
  79         plants["default"]->run();
  80 }
  81
  82 Connection* Server::new_connection(const sockbuf::sockdesc& sd) {
  83 #ifdef DEBUG
  84         cerr << __FILE__ << "(" << __LINE__ << ")"
  85                 <<  ": new_connection(sd = " << sd.sock << ")"
  86                 << endl;
  87 #endif // DEBUG
  88         ControlServer* connection = new ControlServer(sd);
  89         // TODO verificar si el new se hace bien? no creo.
  90         connection->signal_command_received().connect(SigC::bind(
  91                         SigC::slot_class(*this, &Server::on_control_command_received),
  92                         connection));
  93         // TODO:
  94         return connection;
  95 }
  96
  97 void Server::on_plant_finished(const char* plant) {
  98 #ifdef DEBUG
  99         cerr << __FILE__ << "(" << __LINE__ << ")"
 100                 <<  ": on_plant_finished(plant_name = " << plant << endl;
 101 #endif // DEBUG
 102         Glib::Mutex::Lock lock(plants_mutex);
 103         plants.erase(plant);
 104 }
 105
 106 /// \todo Terminar de implementar.
 107 void Server::on_control_command_received(const Command& command,
 108                 ControlServer* controlserver) {
 109 #ifdef DEBUG
 110         cerr << __FILE__ << "(" << __LINE__ << ")"
 111                 <<  ": on_control_command_received(target = "
 112                 << command.get_target() << ", command = " << command.get_command()
 113                 << ", args = [" << String::join(command.get_args(), ", ") << "])"
 114                 << endl;
 115 #endif // DEBUG
 116         HTTPResponse* response;
 117         //bool stop_controlserver = false;
 118         if (command.get_target() == "server") {
 119                 if (command.get_command() == "status") {
 120                         response = cmd_server_status();
 121                 } else if (command.get_command() == "stop") {
 122                         response = new HTTPResponse(HTTPMessage::OK,
 123                                         "<response desc=\"El server se apagará en instantes...\" />");
 124                         // XXX - Sin mandar la respuesta enseguida podría ser que el server
 125                         // cierre la conexión antes de mandar la respuesta.
 126                         //response->headers["Content-Type"] = "text/xml; charset=iso-8859-1";
 127                         //controlserver->send(*response);
 128                         //delete response;
 129                         finish();
 130                         //return;
 131                 } else {
 132                         response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 133                                         "<response desc=\"Invalid command for 'server' taget!\" />");
 134                 }
 135         } else if (command.get_target() == "connection") {
 136                 if (command.get_command() == "list") {
 137                         response = cmd_connection_list();
 138                 } else if (command.get_command() == "stop") {
 139                         response = cmd_connection_stop(command);
 140                 } else {
 141                         response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 142                                         "<response desc=\"Invalid command for 'connection' taget!\" />");
 143                 }
 144         } else if (command.get_target() == "transmission") {
 145                 if (command.get_command() == "list") {
 146                         response = cmd_transmission_list();
 147                 } else if (command.get_command() == "start") {
 148                         response = cmd_transmission_start(command);
 149                 } else if (command.get_command() == "stop") {
 150                         response = cmd_transmission_stop(command);
 151                 } else {
 152                         response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 153                                         "<response desc=\"Invalid command for 'transmission' taget!\" />");
 154                 }
 155         } else if (command.get_target() == "plant") {
 156                 if (command.get_command() == "list") {
 157                         response = cmd_plant_list();
 158                 } else if (command.get_command() == "get") {
 159                         response = cmd_plant_get(command);
 160                 } else if (command.get_command() == "set") {
 161                         response = cmd_plant_set(command);
 162                 } else if (command.get_command() == "stop") {
 163                         response = cmd_plant_stop(command);
 164                 } else {
 165                         response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 166                                         "<response desc=\"Invalid command for 'plant' taget!\" />");
 167                 }
 168         } else {
 169                 response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 170                                 "<response desc=\"Invalid taget!\" />");
 171         }
 172         // FIXME
 173         response->headers["Content-Type"] = "text/xml; charset=iso-8859-1";
 174         //response->headers["Connection"] = "close";
 175         controlserver->send(*response);
 176         delete response;
 177         // FIXME con timeout no debería ser necesario. Verificar cabecera Connection
 178         // para saber si hay que finish()earlo o no.
 179         //if (stop_controlserver) {
 180         //      controlserver->finish();
 181         //}
 182 }
 183
 184 HTTPResponse* Server::cmd_server_status(void) const {
 185         // FIXME
 186         stringstream xml;
 187         xml << "<serverstatus>" << endl;
 188         xml << "\t<version>" VERSION "</version>" << endl;
 189         xml << "\t<authors>" << endl;
 190         xml << "\t\t<author>Nicolás Dimov</author>" << endl;
 191         xml << "\t\t<author>Leandro Lucarella</author>" << endl;
 192         xml << "\t\t<author>Ricardo Markiewicz</author>" << endl;
 193         xml << "\t</authors>" << endl;
 194         xml << "</serverstatus>" << endl;
 195         return new HTTPResponse(HTTPMessage::OK, xml.str());
 196 }
 197
 198 HTTPResponse* Server::cmd_connection_list(void) {
 199         // FIXME
 200         TCPServer::ConnectionInfoList cil = get_connected();
 201         stringstream xml;
 202         xml << "<list type=\"connection\">" << endl;
 203         for (TCPServer::ConnectionInfoList::const_iterator i = cil.begin();
 204                         i != cil.end(); i++) {
 205                 xml << "\t<row>" << endl;
 206                 xml << "\t\t<cell>" << i->host << "</cell>" << endl;
 207                 xml << "\t\t<cell>" << i->port << "</cell>" << endl;
 208                 xml << "\t</row>" << endl;
 209         }
 210         xml << "</list>" << endl;
 211         return new HTTPResponse(HTTPMessage::OK, xml.str());
 212 }
 213
 214 HTTPResponse* Server::cmd_connection_stop(const Command& command) {
 215         const Command::Arguments& args = command.get_args();
 216         Connection::Port port;
 217         if (args.size() < 2) {
 218                 return new HTTPResponse(HTTPMessage::CONFLICT,
 219                                 "<response desc=\"Faltan argumentos.\" />");
 220         } else if (disconnect(args[0], to(args[1], port))) {
 221                 return new HTTPResponse(HTTPMessage::OK,
 222                                 string("<response desc=\"La conexión a ") + args[0] + ":" + args[1]
 223                                 + " se cerrará en instantes...\" />");
 224         } else {
 225                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 226                                 string("<response desc=\"No existe una conexión a ") + args[0]
 227                                 + ":" + args[1] + "\" />");
 228         }
 229 }
 230
 231 HTTPResponse* Server::cmd_transmission_list(void) {
 232         // FIXME
 233         stringstream xml;
 234         xml << "<list type=\"transmission\">" << endl;
 235 /*TODO  plants_mutex.lock();
 236         for (PlantList::const_iterator i = plants.begin();
 237                         i != plants.end(); i++) {
 238                 trans
 239                 xml << "       <li>" << (*i)->get_host() << ":"
 240                         << (*i)->get_port() << " [<a href=\"/transmission/stop/"
 241                         << (*i)->get_host() << "/" << (*i)->get_port()
 242                         << "\">desconectar</a>]</li>" << endl;
 243         }
 244         transmissions_mutex.unlock();*/
 245         xml << "</list>" << endl;
 246         return new HTTPResponse(HTTPMessage::OK, xml.str());
 247 }
 248
 249 HTTPResponse* Server::cmd_transmission_start(const Command& command) {
 250         const Command::Arguments& args = command.get_args();
 251         if (args.size() < 3) {
 252                 return new HTTPResponse(HTTPMessage::CONFLICT,
 253                                 "<response desc=\"Faltan argumentos.\" />");
 254         } else {
 255                 string plant = args[0];
 256                 string host = args[1];
 257                 Connection::Port port = to(args[2], port);
 258                 Glib::Mutex::Lock lock(plants_mutex);
 259                 PlantList::iterator p = plants.find(plant);
 260                 if (p == plants.end()) {
 261                         return new HTTPResponse(HTTPMessage::NOT_FOUND,
 262                                         string("<response desc=\"No existe la planta '") + plant + "'.\" />");
 263                 // TODO - agregar chequeo de que la transmision a ese host:port no
 264                 //        exista para otra planta?
 265                 } else if (plants[plant]->transmission_start(host, port)) {
 266                         return new HTTPResponse(HTTPMessage::OK,
 267                                         string("<response desc=\"Se empieza a transmitir la planta '") + plant
 268                                         + "' a " + host + ":" + String().from(port) + ".\" />");
 269                 } else {
 270                         return new HTTPResponse(HTTPMessage::INTERNAL_SERVER_ERROR,
 271                                         string("<response desc=\"Error al crear la transmisión a de la planta '")
 272                                         + plant + "' a " + host + ":" + args[2] + ".\" />");
 273                 }
 274         }
 275 }
 276
 277 HTTPResponse* Server::cmd_transmission_stop(const Command& command) {
 278         const Command::Arguments& args = command.get_args();
 279         if (args.size() < 2) {
 280                 return new HTTPResponse(HTTPMessage::CONFLICT,
 281                                 "<response desc=\"Faltan argumentos.\" />");
 282         } else {
 283                 const string& host = args[0];
 284                 Connection::Port port = to(args[1], port);
 285                 for (PlantList::iterator i = plants.begin(); i != plants.end(); i++) {
 286                         // TODO - agregar chequeo para saber si existe una conexion (para
 287                         // tirar error de que no hay conexion o de que no se pudo
 288                         // desconectar.
 289                         if (i->second->transmission_stop(host, port)) {
 290                                 return new HTTPResponse(HTTPMessage::OK,
 291                                                 string("<response desc=\"Se finaliza la transmisión de la planta '")
 292                                                 + i->first + "' a " + host + ":" + args[1] + ".\" />");
 293                         }
 294                 }
 295                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 296                                 string("<response desc=\"No se puede finalizar la transmisión a ")
 297                                 + host + ":" + args[1] + ".\" />");
 298         }
 299 }
 300
 301 HTTPResponse* Server::cmd_plant_list(void) {
 302         // FIXME
 303         stringstream xml;
 304         xml << "<list type=\"plant\">" << endl;
 305         plants_mutex.lock();
 306         for (PlantList::const_iterator i = plants.begin();
 307                         i != plants.end(); i++) {
 308                 xml << "\t<row>" << endl;
 309                 xml << "\t\t<cell>" << i->first << "</cell>" << endl;
 310                 xml << "\t</row>" << endl;
 311         }
 312         plants_mutex.unlock();
 313         xml << "</list>" << endl;
 314         return new HTTPResponse(HTTPMessage::OK, xml.str());
 315 }
 316
 317 HTTPResponse* Server::cmd_plant_get(const Command& command) {
 318         if (!command.get_args().size()) {
 319                 return new HTTPResponse(HTTPMessage::CONFLICT,
 320                                 "<response desc=\"Faltan argumentos.\" />");
 321         }
 322         Glib::Mutex::Lock lock(plants_mutex);
 323         string plant = command.get_args()[0];
 324         if (plants.find(plant) == plants.end()) {
 325                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 326                                 string("<response desc=\"No existe la planta ") + plant + "\" />");
 327         }
 328         // TODO try/catch?
 329         string xml = plants[plant]->get_xml();
 330         if (xml.length()) {
 331                 return new HTTPResponse(HTTPMessage::OK, xml);
 332         } else {
 333                 return new HTTPResponse(HTTPMessage::INTERNAL_SERVER_ERROR,
 334                                 ("<response desc=\"No se pudo obtener el XML de la planta ") + plant + "\" />");
 335         }
 336 }
 337
 338 HTTPResponse* Server::cmd_plant_set(const Command& command) {
 339         const Command::Arguments& args = command.get_args();
 340         if (args.size() < 4) {
 341                 return new HTTPResponse(HTTPMessage::CONFLICT,
 342                                 "<response desc=\"Faltan argumentos.\" />");
 343         }
 344         string plant = args[0];
 345         string element = args[1];
 346         string key = args[2];
 347         if (key != "open") {
 348                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 349                                 string("<response desc=\"La clave '") + key + "' es inválida.\" />");
 350         }
 351         string value = args[3];
 352         Glib::Mutex::Lock lock(plants_mutex);
 353         PlantList::iterator p = plants.find(plant);
 354         if (p == plants.end()) {
 355                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 356                                 string("<response desc=\"No existe la planta '") + plant + "'.\" />");
 357         }
 358         bool open = true;
 359         if ((value == "false") || (value == "0") || (value == "off")
 360                         || (value == "no")) {
 361                 open = false;
 362         }
 363         if (!plants[plant]->set_open(element, open)) {
 364                 return new HTTPResponse(HTTPMessage::CONFLICT,
 365                                 string("<response desc=\"No se pudo cambiar el estado del elemento '") + element + "'.\" />");
 366         }
 367         return new HTTPResponse(HTTPMessage::OK,
 368                         string("<response desc=\"Se cambió el estado del elemento '") + element + "'.\" />");
 369 }
 370
 371 HTTPResponse* Server::cmd_plant_stop(const Command& command) {
 372         if (!command.get_args().size()) {
 373                 return new HTTPResponse(HTTPMessage::CONFLICT,
 374                                 "<response desc=\"Faltan argumentos.\" />");
 375         }
 376         Glib::Mutex::Lock lock(plants_mutex);
 377         const string name = command.get_args()[0];
 378         if (plants.find(name) == plants.end()) {
 379                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 380                                 string("<response desc=\"No existe la planta ") + name + "\" />");
 381         }
 382         // TODO Ver si al frenar la planta se destruye (no deberia!!!)
 383         plants[name]->finish();
 384         return new HTTPResponse(HTTPMessage::OK,
 385                         string("<response desc=\"La planta '") + name + "' se cerrará en instantes...\" />");
 386 }
 387
 388 } // namespace Server
 389
 390 } // namespace PlaQui
 391