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                         finish();
 125                         response = new HTTPResponse(HTTPMessage::OK,
 126                                         "<response desc=\"El server se apagará en instantes...\" />");
 127                         response->headers["Content-Type"] = "text/xml; charset=iso-8859-1";
 128                         controlserver->send(*response);
 129                         delete response;
 130                         // Creo una conexión suicida para que el accept() del server retorne
 131                         // el control y el server pueda terminar realmente.
 132                         try {
 133                                 sockinetbuf suicida(sockbuf::sock_stream);
 134                                 suicida.connect(socket.localhost(), socket.localport());
 135                         } catch (...) {
 136                                 // FIXME
 137                                 signal_error().emit(12345, "ahhhh! no puedo crear conexion suicida");
 138                         }
 139                         return;
 140                 } else {
 141                         response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 142                                         "<response desc=\"Invalid command for 'server' taget!\" />");
 143                 }
 144         } else if (command.get_target() == "connection") {
 145                 if (command.get_command() == "list") {
 146                         response = cmd_connection_list();
 147                 } else if (command.get_command() == "stop") {
 148                         response = cmd_connection_stop(command);
 149                 } else {
 150                         response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 151                                         "<response desc=\"Invalid command for 'connection' taget!\" />");
 152                 }
 153         } else if (command.get_target() == "transmission") {
 154                 if (command.get_command() == "list") {
 155                         response = cmd_transmission_list();
 156                 } else if (command.get_command() == "start") {
 157                         response = cmd_transmission_start(command);
 158                 } else if (command.get_command() == "stop") {
 159                         response = cmd_transmission_stop(command);
 160                 } else {
 161                         response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 162                                         "<response desc=\"Invalid command for 'transmission' taget!\" />");
 163                 }
 164         } else if (command.get_target() == "plant") {
 165                 if (command.get_command() == "list") {
 166                         response = cmd_plant_list();
 167                 } else if (command.get_command() == "get") {
 168                         response = cmd_plant_get(command);
 169                 } else if (command.get_command() == "set") {
 170                         response = cmd_plant_set(command);
 171                 } else if (command.get_command() == "stop") {
 172                         response = cmd_plant_stop(command);
 173                 } else {
 174                         response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 175                                         "<response desc=\"Invalid command for 'plant' taget!\" />");
 176                 }
 177         } else {
 178                 response = new HTTPResponse(HTTPMessage::NOT_FOUND,
 179                                 "<response desc=\"Invalid taget!\" />");
 180         }
 181         // FIXME
 182         response->headers["Content-Type"] = "text/xml; charset=iso-8859-1";
 183         //response->headers["Connection"] = "close";
 184         controlserver->send(*response);
 185         delete response;
 186         // FIXME con timeout no debería ser necesario. Verificar cabecera Connection
 187         // para saber si hay que finish()earlo o no.
 188         //if (stop_controlserver) {
 189         //      controlserver->finish();
 190         //}
 191 }
 192
 193 HTTPResponse* Server::cmd_server_status(void) const {
 194         // FIXME
 195         stringstream xml;
 196         xml << "<serverstatus>" << endl;
 197         xml << "\t<version>" VERSION "</version>" << endl;
 198         xml << "\t<authors>" << endl;
 199         xml << "\t\t<author>Nicolás Dimov</author>" << endl;
 200         xml << "\t\t<author>Leandro Lucarella</author>" << endl;
 201         xml << "\t\t<author>Ricardo Markiewicz</author>" << endl;
 202         xml << "\t</authors>" << endl;
 203         xml << "</serverstatus>" << endl;
 204         return new HTTPResponse(HTTPMessage::OK, xml.str());
 205 }
 206
 207 HTTPResponse* Server::cmd_connection_list(void) {
 208         // FIXME
 209         TCPServer::ConnectionInfoList cil = get_connected();
 210         stringstream xml;
 211         xml << "<list type=\"connection\">" << endl;
 212         for (TCPServer::ConnectionInfoList::const_iterator i = cil.begin();
 213                         i != cil.end(); i++) {
 214                 xml << "\t<row>" << endl;
 215                 xml << "\t\t<cell>" << i->host << "</cell>" << endl;
 216                 xml << "\t\t<cell>" << i->port << "</cell>" << endl;
 217                 xml << "\t</row>" << endl;
 218         }
 219         xml << "</list>" << endl;
 220         return new HTTPResponse(HTTPMessage::OK, xml.str());
 221 }
 222
 223 HTTPResponse* Server::cmd_connection_stop(const Command& command) {
 224         const Command::Arguments& args = command.get_args();
 225         Connection::Port port;
 226         if (args.size() < 2) {
 227                 return new HTTPResponse(HTTPMessage::CONFLICT,
 228                                 "<response desc=\"Faltan argumentos.\" />");
 229         } else if (disconnect(args[0], to(args[1], port))) {
 230                 return new HTTPResponse(HTTPMessage::OK,
 231                                 string("<response desc=\"La conexión a ") + args[0] + ":" + args[1]
 232                                 + " se cerrará en instantes...\" />");
 233         } else {
 234                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 235                                 string("<response desc=\"No existe una conexión a ") + args[0]
 236                                 + ":" + args[1] + "\" />");
 237         }
 238 }
 239
 240 HTTPResponse* Server::cmd_transmission_list(void) {
 241         // FIXME
 242         stringstream xml;
 243         xml << "<list type=\"transmission\">" << endl;
 244 /*TODO  plants_mutex.lock();
 245         for (PlantList::const_iterator i = plants.begin();
 246                         i != plants.end(); i++) {
 247                 trans
 248                 xml << "       <li>" << (*i)->get_host() << ":"
 249                         << (*i)->get_port() << " [<a href=\"/transmission/stop/"
 250                         << (*i)->get_host() << "/" << (*i)->get_port()
 251                         << "\">desconectar</a>]</li>" << endl;
 252         }
 253         transmissions_mutex.unlock();*/
 254         xml << "</list>" << endl;
 255         return new HTTPResponse(HTTPMessage::OK, xml.str());
 256 }
 257
 258 HTTPResponse* Server::cmd_transmission_start(const Command& command) {
 259         const Command::Arguments& args = command.get_args();
 260         if (args.size() < 3) {
 261                 return new HTTPResponse(HTTPMessage::CONFLICT,
 262                                 "<response desc=\"Faltan argumentos.\" />");
 263         } else {
 264                 string plant = args[0];
 265                 string host = args[1];
 266                 Connection::Port port = to(args[2], port);
 267                 Glib::Mutex::Lock lock(plants_mutex);
 268                 PlantList::iterator p = plants.find(plant);
 269                 if (p == plants.end()) {
 270                         return new HTTPResponse(HTTPMessage::NOT_FOUND,
 271                                         string("<response desc=\"No existe la planta '") + plant + "'.\" />");
 272                 // TODO - agregar chequeo de que la transmision a ese host:port no
 273                 //        exista para otra planta?
 274                 } else if (plants[plant]->transmission_start(host, port)) {
 275                         return new HTTPResponse(HTTPMessage::OK,
 276                                         string("<response desc=\"Se empieza a transmitir la planta '") + plant
 277                                         + "' a " + host + ":" + String().from(port) + ".\" />");
 278                 } else {
 279                         return new HTTPResponse(HTTPMessage::INTERNAL_SERVER_ERROR,
 280                                         string("<response desc=\"Error al crear la transmisión a de la planta '")
 281                                         + plant + "' a " + host + ":" + args[2] + ".\" />");
 282                 }
 283         }
 284 }
 285
 286 HTTPResponse* Server::cmd_transmission_stop(const Command& command) {
 287         const Command::Arguments& args = command.get_args();
 288         if (args.size() < 2) {
 289                 return new HTTPResponse(HTTPMessage::CONFLICT,
 290                                 "<response desc=\"Faltan argumentos.\" />");
 291         } else {
 292                 const string& host = args[0];
 293                 Connection::Port port = to(args[1], port);
 294                 for (PlantList::iterator i = plants.begin(); i != plants.end(); i++) {
 295                         // TODO - agregar chequeo para saber si existe una conexion (para
 296                         // tirar error de que no hay conexion o de que no se pudo
 297                         // desconectar.
 298                         if (i->second->transmission_stop(host, port)) {
 299                                 return new HTTPResponse(HTTPMessage::OK,
 300                                                 string("<response desc=\"Se finaliza la transmisión de la planta '")
 301                                                 + i->first + "' a " + host + ":" + args[1] + ".\" />");
 302                         }
 303                 }
 304                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 305                                 string("<response desc=\"No se puede finalizar la transmisión a ")
 306                                 + host + ":" + args[1] + ".\" />");
 307         }
 308 }
 309
 310 HTTPResponse* Server::cmd_plant_list(void) {
 311         // FIXME
 312         stringstream xml;
 313         xml << "<list type=\"plant\">" << endl;
 314         plants_mutex.lock();
 315         for (PlantList::const_iterator i = plants.begin();
 316                         i != plants.end(); i++) {
 317                 xml << "\t<row>" << endl;
 318                 xml << "\t\t<cell>" << i->first << "</cell>" << endl;
 319                 xml << "\t</row>" << endl;
 320         }
 321         plants_mutex.unlock();
 322         xml << "</list>" << endl;
 323         return new HTTPResponse(HTTPMessage::OK, xml.str());
 324 }
 325
 326 HTTPResponse* Server::cmd_plant_get(const Command& command) {
 327         if (!command.get_args().size()) {
 328                 return new HTTPResponse(HTTPMessage::CONFLICT,
 329                                 "<response desc=\"Faltan argumentos.\" />");
 330         }
 331         Glib::Mutex::Lock lock(plants_mutex);
 332         string plant = command.get_args()[0];
 333         if (plants.find(plant) == plants.end()) {
 334                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 335                                 string("<response desc=\"No existe la planta ") + plant + "\" />");
 336         }
 337         // TODO try/catch?
 338         string xml = plants[plant]->get_xml();
 339         if (xml.length()) {
 340                 return new HTTPResponse(HTTPMessage::OK, xml);
 341         } else {
 342                 return new HTTPResponse(HTTPMessage::INTERNAL_SERVER_ERROR,
 343                                 ("<response desc=\"No se pudo obtener el XML de la planta ") + plant + "\" />");
 344         }
 345 }
 346
 347 HTTPResponse* Server::cmd_plant_set(const Command& command) {
 348         const Command::Arguments& args = command.get_args();
 349         if (args.size() < 4) {
 350                 return new HTTPResponse(HTTPMessage::CONFLICT,
 351                                 "<response desc=\"Faltan argumentos.\" />");
 352         }
 353         string plant = args[0];
 354         string element = args[1];
 355         string key = args[2];
 356         if (key != "open") {
 357                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 358                                 string("<response desc=\"La clave '") + key + "' es inválida.\" />");
 359         }
 360         string value = args[3];
 361         Glib::Mutex::Lock lock(plants_mutex);
 362         PlantList::iterator p = plants.find(plant);
 363         if (p == plants.end()) {
 364                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 365                                 string("<response desc=\"No existe la planta '") + plant + "'.\" />");
 366         }
 367         bool open = true;
 368         if ((value == "false") || (value == "0") || (value == "off")
 369                         || (value == "no")) {
 370                 open = false;
 371         }
 372         if (!plants[plant]->set_open(element, open)) {
 373                 return new HTTPResponse(HTTPMessage::CONFLICT,
 374                                 string("<response desc=\"No se pudo cambiar el estado del elemento '") + element + "'.\" />");
 375         }
 376         return new HTTPResponse(HTTPMessage::OK,
 377                         string("<response desc=\"Se cambió el estado del elemento '") + element + "'.\" />");
 378 }
 379
 380 HTTPResponse* Server::cmd_plant_stop(const Command& command) {
 381         if (!command.get_args().size()) {
 382                 return new HTTPResponse(HTTPMessage::CONFLICT,
 383                                 "<response desc=\"Faltan argumentos.\" />");
 384         }
 385         Glib::Mutex::Lock lock(plants_mutex);
 386         const string name = command.get_args()[0];
 387         if (plants.find(name) == plants.end()) {
 388                 return new HTTPResponse(HTTPMessage::NOT_FOUND,
 389                                 string("<response desc=\"No existe la planta ") + name + "\" />");
 390         }
 391         // TODO Ver si al frenar la planta se destruye (no deberia!!!)
 392         plants[name]->finish();
 393         return new HTTPResponse(HTTPMessage::OK,
 394                         string("<response desc=\"La planta '") + name + "' se cerrará en instantes...\" />");
 395 }
 396
 397 } // namespace Server
 398
 399 } // namespace PlaQui
 400