cloudeebus/cloudeebus.js

   1 /******************************************************************************
   2  * Copyright 2012 Intel Corporation.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *****************************************************************************/
  16
  17
  18
  19 /*****************************************************************************/
  20
  21 var dbus = { // hook object for dbus types not translated by python-json
  22                 Double: function(value, level) {
  23                         return value;
  24                 }
  25 };
  26
  27
  28
  29 /*****************************************************************************/
  30
  31 var cloudeebus = window.cloudeebus = {version: "0.2.1"};
  32
  33 cloudeebus.reset = function() {
  34         cloudeebus.sessionBus = null;
  35         cloudeebus.systemBus = null;
  36         cloudeebus.wampSession = null;
  37         cloudeebus.uri = null;
  38 };
  39
  40
  41 cloudeebus.log = function(msg) {
  42 };
  43
  44
  45 cloudeebus.connect = function(uri, manifest, successCB, errorCB) {
  46         cloudeebus.reset();
  47         cloudeebus.uri = uri;
  48
  49         function onCloudeebusVersionCheckCB(version) {
  50                 if (cloudeebus.version == version) {
  51                         cloudeebus.log("Connected to " + cloudeebus.uri);
  52                         if (successCB)
  53                                 successCB();
  54                 } else {
  55                         var errorMsg = "Cloudeebus server version " + version + " and client version " + cloudeebus.version + " mismatch";
  56                         cloudeebus.log(errorMsg);
  57                         if (errorCB)
  58                                 errorCB(errorMsg);
  59                 }
  60         }
  61
  62         function onWAMPSessionAuthErrorCB(error) {
  63                 cloudeebus.log("Authentication error: " + error.desc);
  64                 if (errorCB)
  65                         errorCB(error.desc);
  66         }
  67
  68         function onWAMPSessionAuthenticatedCB(permissions) {
  69                 cloudeebus.sessionBus = new cloudeebus.BusConnection("session", cloudeebus.wampSession);
  70                 cloudeebus.systemBus = new cloudeebus.BusConnection("system", cloudeebus.wampSession);
  71                 cloudeebus.wampSession.call("getVersion").then(onCloudeebusVersionCheckCB, errorCB);
  72         }
  73
  74         function onWAMPSessionChallengedCB(challenge) {
  75                 var signature = cloudeebus.wampSession.authsign(challenge, manifest.key);
  76                 cloudeebus.wampSession.auth(signature).then(onWAMPSessionAuthenticatedCB, onWAMPSessionAuthErrorCB);
  77         }
  78
  79         function onWAMPSessionConnectedCB(session) {
  80                 cloudeebus.wampSession = session;
  81                 if (manifest)
  82                         cloudeebus.wampSession.authreq(
  83                                         manifest.name,
  84                                         {permissions: JSON.stringify(manifest.permissions)}
  85                                 ).then(onWAMPSessionChallengedCB, onWAMPSessionAuthErrorCB);
  86                 else
  87                         cloudeebus.wampSession.authreq().then(function() {
  88                                 cloudeebus.wampSession.auth().then(onWAMPSessionAuthenticatedCB, onWAMPSessionAuthErrorCB);
  89                                 }, onWAMPSessionAuthErrorCB);
  90         }
  91
  92         function onWAMPSessionErrorCB(code, reason) {
  93                 if (code == ab.CONNECTION_UNSUPPORTED) {
  94                         cloudeebus.log("Browser is not supported");
  95                 }
  96                 else {
  97                         cloudeebus.log("Failed to open session, code = " + code + ", reason = " + reason);
  98                 }
  99                 if (errorCB)
 100                         errorCB(reason);
 101         }
 102
 103         return ab.connect(cloudeebus.uri, onWAMPSessionConnectedCB, onWAMPSessionErrorCB);
 104 };
 105
 106
 107 cloudeebus.SessionBus = function() {
 108         return cloudeebus.sessionBus;
 109 };
 110
 111
 112 cloudeebus.SystemBus = function() {
 113         return cloudeebus.systemBus;
 114 };
 115
 116
 117
 118 /*****************************************************************************/
 119
 120 cloudeebus.BusConnection = function(name, session) {
 121         this.name = name;
 122         this.wampSession = session;
 123         this.service = null;
 124         return this;
 125 };
 126
 127
 128 cloudeebus.BusConnection.prototype.getObject = function(busName, objectPath, introspectCB, errorCB) {
 129         var proxy = new cloudeebus.ProxyObject(this.wampSession, this, busName, objectPath);
 130         if (introspectCB)
 131                 proxy._introspect(introspectCB, errorCB);
 132         return proxy;
 133 };
 134
 135
 136 cloudeebus.BusConnection.prototype.addService = function(serviceName, successCB, errorCB) {
 137         var self = this;
 138
 139         cloudeebusService = new cloudeebus.Service(this.wampSession, this, serviceName);
 140
 141         function busServiceAddedSuccessCB(service) {
 142                 self.service = service;
 143                 if (successCB)
 144                         successCB(cloudeebusService);
 145         }
 146
 147         function busServiceAddedErrorCB(error) {
 148                 if (errorCB)
 149                         errorCB();
 150         }
 151
 152         cloudeebusService.add(busServiceAddedSuccessCB, busServiceAddedErrorCB);
 153 };
 154
 155
 156 /*****************************************************************************/
 157
 158 cloudeebus.Service = function(session, busConnection, name) {
 159         this.wampSession = session;
 160         this.busConnection = busConnection;
 161         this.name = name;
 162         this.isCreated = false;
 163         return this;
 164 };
 165
 166 cloudeebus.Service.prototype.add = function(successCB, errorCB) {
 167         function ServiceAddSuccessCB(dbusService) {
 168                 if (successCB) {
 169                         try { // calling dbus hook object function for un-translated types
 170                                 successCB(dbusService);
 171                         }
 172                         catch (e) {
 173                                 alert(arguments.callee.name + "-> Method callback exception: " + e);
 174                         }
 175                 }
 176         }
 177
 178         var arglist = [
 179             this.busConnection,
 180             this.name
 181             ];
 182
 183         // call dbusSend with bus type, destination, object, message and arguments
 184         this.wampSession.call("serviceAdd", arglist).then(ServiceAddSuccessCB, errorCB);
 185 };
 186
 187 cloudeebus.Service.prototype.addAgent = function(objectPath, xmlTemplate, successCB, errorCB) {
 188         function ServiceAddAgentSuccessCB(objPath) {
 189                 if (successCB) {
 190                         try { // calling dbus hook object function for un-translated types
 191                                 successCB(objPath);
 192                         }
 193                         catch (e) {
 194                                 alert(arguments.callee.name + "-> Method callback exception: " + e);
 195                         }
 196                 }
 197         }
 198
 199         var arglist = [
 200             objectPath,
 201             xmlTemplate
 202             ];
 203
 204         // call dbusSend with bus type, destination, object, message and arguments
 205         this.wampSession.call("serviceAddAgent", arglist).then(ServiceAddAgentSuccessCB, errorCB);
 206 };
 207
 208 cloudeebus.Service.prototype.delAgent = function(objectPath, successCB, errorCB) {
 209         function ServiceDelAgentSuccessCB(agent) {
 210                 if (successCB) {
 211                         try { // calling dbus hook object function for un-translated types
 212                                 successCB(agent);
 213                         }
 214                         catch (e) {
 215                                 alert(arguments.callee.name + "-> Method callback exception: " + e);
 216                         }
 217                 }
 218         }
 219
 220         var arglist = [
 221             objectPath
 222             ];
 223
 224         // call dbusSend with bus type, destination, object, message and arguments
 225         this.wampSession.call("serviceDelAgent", arglist).then(ServiceDelAgentSuccessCB, errorCB);
 226 };
 227
 228 cloudeebus.Service.prototype.registerMethod = function(methodId, methodHandler) {
 229         this.wampSession.subscribe(methodId, methodHandler);
 230 };
 231
 232 cloudeebus.Service.prototype.returnMethod = function(methodId, success, result, successCB, errorCB) {
 233         var arglist = [
 234             methodId,
 235             success,
 236             result
 237             ];
 238
 239         this.wampSession.call("returnMethod", arglist).then(successCB, errorCB);
 240 };
 241
 242
 243 /*****************************************************************************/
 244
 245 cloudeebus.ProxyObject = function(session, busConnection, busName, objectPath) {
 246         this.wampSession = session;
 247         this.busConnection = busConnection;
 248         this.busName = busName;
 249         this.objectPath = objectPath;
 250         return this;
 251 };
 252
 253
 254 cloudeebus.ProxyObject.prototype._introspect = function(successCB, errorCB) {
 255
 256         var self = this;
 257
 258         function getAllPropertiesSuccessCB(props) {
 259                 for (var prop in props)
 260                         self[prop] = props[prop];
 261                 getAllPropertiesNextInterfaceCB();
 262         }
 263
 264         function getAllPropertiesNextInterfaceCB() {
 265                 if (self.propInterfaces.length > 0)
 266                         self.callMethod("org.freedesktop.DBus.Properties",
 267                                 "GetAll",
 268                                 [self.propInterfaces.pop()],
 269                                 getAllPropertiesSuccessCB,
 270                                 errorCB ? errorCB : getAllPropertiesNextInterfaceCB);
 271                 else {
 272                         self.propInterfaces = null;
 273                         if (successCB)
 274                                 successCB(self);
 275                 }
 276         }
 277
 278         function introspectSuccessCB(str) {
 279                 var parser = new DOMParser();
 280                 var xmlDoc = parser.parseFromString(str, "text/xml");
 281                 var interfaces = xmlDoc.getElementsByTagName("interface");
 282                 self.propInterfaces = [];
 283                 var supportDBusProperties = false;
 284                 for (var i=0; i < interfaces.length; i++) {
 285                         var ifName = interfaces[i].attributes.getNamedItem("name").value;
 286                         if (ifName == "org.freedesktop.DBus.Properties")
 287                                 supportDBusProperties = true;
 288                         var hasProperties = false;
 289                         var ifChild = interfaces[i].firstChild;
 290                         while (ifChild) {
 291                                 if (ifChild.nodeName == "method") {
 292                                         var nArgs = 0;
 293                                         var metChild = ifChild.firstChild;
 294                                         while (metChild) {
 295                                                 if (metChild.nodeName == "arg" &&
 296                                                         metChild.attributes.getNamedItem("direction").value == "in")
 297                                                                 nArgs++;
 298                                                 metChild = metChild.nextSibling;
 299                                         }
 300                                         self._addMethod(ifName,
 301                                                         ifChild.attributes.getNamedItem("name").value,
 302                                                         nArgs);
 303                                 }
 304                                 else if (ifChild.nodeName == "property") {
 305                                         if (!hasProperties)
 306                                                 self.propInterfaces.push(ifName);
 307                                         hasProperties = true;
 308                                 }
 309                                 ifChild = ifChild.nextSibling;
 310                         }
 311                 }
 312                 if (supportDBusProperties && self.propInterfaces.length > 0) {
 313                         self.callMethod("org.freedesktop.DBus.Properties",
 314                                 "GetAll",
 315                                 [self.propInterfaces.pop()],
 316                                 getAllPropertiesSuccessCB,
 317                                 errorCB ? errorCB : getAllPropertiesNextInterfaceCB);
 318                 }
 319                 else {
 320                         self.propInterfaces = null;
 321                         if (successCB)
 322                                 successCB(self);
 323                 }
 324         }
 325
 326         // call Introspect on self
 327         self.callMethod("org.freedesktop.DBus.Introspectable", "Introspect", [], introspectSuccessCB, errorCB);
 328 };
 329
 330
 331 cloudeebus.ProxyObject.prototype._addMethod = function(ifName, method, nArgs) {
 332
 333         var self = this;
 334
 335         self[method] = function() {
 336                 if (arguments.length < nArgs || arguments.length > nArgs + 2)
 337                         throw "Error: method " + method + " takes " + nArgs + " parameters, got " + arguments.length + ".";
 338                 var args = [];
 339                 var successCB = null;
 340                 var errorCB = null;
 341                 for (var i=0; i < nArgs; i++ )
 342                         args.push(arguments[i]);
 343                 if (arguments.length > nArgs)
 344                         successCB = arguments[nArgs];
 345                 if (arguments.length > nArgs + 1)
 346                         errorCB = arguments[nArgs + 1];
 347                 self.callMethod(ifName, method, args, successCB, errorCB);
 348         };
 349
 350 };
 351
 352
 353 cloudeebus.ProxyObject.prototype.callMethod = function(ifName, method, args, successCB, errorCB) {
 354
 355         var self = this;
 356
 357         function callMethodSuccessCB(str) {
 358                 if (successCB) {
 359                         try { // calling dbus hook object function for un-translated types
 360                                 successCB.apply(self, eval(str));
 361                         }
 362                         catch (e) {
 363                                 cloudeebus.log("Method callback exception: " + e);
 364                                 if (errorCB)
 365                                         errorCB(e);
 366                         }
 367                 }
 368         }
 369
 370         function callMethodErrorCB(error) {
 371                 cloudeebus.log("Error calling method: " + method + " on object: " + self.objectPath + " : " + error.desc);
 372                 if (errorCB)
 373                         errorCB(error.desc);
 374         }
 375
 376         var arglist = [
 377                 self.busConnection.name,
 378                 self.busName,
 379                 self.objectPath,
 380                 ifName,
 381                 method,
 382                 JSON.stringify(args)
 383         ];
 384
 385         // call dbusSend with bus type, destination, object, message and arguments
 386         self.wampSession.call("dbusSend", arglist).then(callMethodSuccessCB, callMethodErrorCB);
 387 };
 388
 389
 390 cloudeebus.ProxyObject.prototype.connectToSignal = function(ifName, signal, successCB, errorCB) {
 391
 392         var self = this;
 393
 394         function signalHandler(id, data) {
 395                 if (successCB) {
 396                         try { // calling dbus hook object function for un-translated types
 397                                 successCB.apply(self, eval(data));
 398                         }
 399                         catch (e) {
 400                                 cloudeebus.log("Signal handler exception: " + e);
 401                                 if (errorCB)
 402                                         errorCB(e);
 403                         }
 404                 }
 405         }
 406
 407         function connectToSignalSuccessCB(str) {
 408                 try {
 409                         self.wampSession.subscribe(str, signalHandler);
 410                 }
 411                 catch (e) {
 412                         cloudeebus.log("Subscribe error: " + e);
 413                 }
 414         }
 415
 416         function connectToSignalErrorCB(error) {
 417                 cloudeebus.log("Error connecting to signal: " + signal + " on object: " + self.objectPath + " : " + error.desc);
 418                 if (errorCB)
 419                         errorCB(error.desc);
 420         }
 421
 422         var arglist = [
 423                 self.busConnection.name,
 424                 self.busName,
 425                 self.objectPath,
 426                 ifName,
 427                 signal
 428         ];
 429
 430         // call dbusSend with bus type, destination, object, message and arguments
 431         self.wampSession.call("dbusRegister", arglist).then(connectToSignalSuccessCB, connectToSignalErrorCB);
 432 };
 433
 434
 435 cloudeebus.ProxyObject.prototype.disconnectSignal = function(ifName, signal) {
 436         try {
 437                 this.wampSession.unsubscribe(this.busConnection.name + "#" + this.busName + "#" + this.objectPath + "#" + ifName + "#" + signal);
 438         }
 439         catch (e) {
 440                 cloudeebus.log("Unsubscribe error: " + e);
 441         }
 442 };