1.4.5

.pubignore

@@ -0,0 +1 @@
+test/

CHANGELOG.md

@@ -1,3 +1,9 @@
+## [1.4.3] - Hotfix
+Bugfix
+
+## [1.4.2] - Release
+Added get-template command
+
 ## [1.2.3] - Release
 Improved property updating
 

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2019-2021 Esiur Foundation, Ahmed Kh. Zamil
+Copyright (c) 2019-2022 Esiur Foundation, Ahmed Kh. Zamil
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

lib/builder.dart

@@ -1,47 +1,47 @@
-import 'package:source_gen/source_gen.dart';
+// import 'package:source_gen/source_gen.dart';
-import 'package:build/build.dart';
+// import 'package:build/build.dart';
-import 'package:yaml/yaml.dart';
+// import 'package:yaml/yaml.dart';
 
-//Builder iipService(BuilderOptions options) {
+// //Builder iipService(BuilderOptions options) {
-  //return LibraryBuilder(TemplateBuilder(), generatedExtension: '.info.dart');
+//   //return LibraryBuilder(TemplateBuilder(), generatedExtension: '.info.dart');
-//}
+// //}
 
-class TemplateBuilder implements Builder {
+// class TemplateBuilder implements Builder {
-  //BuilderOptions options;
+//   //BuilderOptions options;
-  String _fileName;
+//   String _fileName;
-  TemplateBuilder([BuilderOptions? options]) : _fileName = _get_dest(options);
+//   TemplateBuilder([BuilderOptions? options]) : _fileName = _get_dest(options);
 
-  @override
-  Future build(BuildStep buildStep) async {
-    final id = AssetId(buildStep.inputId.package, _fileName);
-
-    // generate
-    var content = "Testing";
-
-    await buildStep.writeAsString(id, content);
-  }
-
-  static String _get_dest(BuilderOptions? options) {
-    const defaultDestination = 'lib/src/iip_template.dart';
-    if (options == null) return defaultDestination;
-    if (options.config == null) return defaultDestination;
-    return options.config['destination_file'] as String ?? defaultDestination;
-  }
-
-  @override
-  Map<String, List<String>> get buildExtensions {
-    return {
-      '.iip.yaml': [".iip.dart"]
-    };
-  }
-}
-
-// class TemplateBuilder extends Generator {
 //   @override
-//   String generate(LibraryReader library, BuildStep buildStep) {
+//   Future build(BuildStep buildStep) async {
-//     return '''
+//     final id = AssetId(buildStep.inputId.package, _fileName);
-// // Source library: ${library.element.source.uri}
+
-// const Testinggggg = 3;
+//     // generate
-// ''';
+//     var content = "Testing";
+
+//     await buildStep.writeAsString(id, content);
+//   }
+
+//   static String _get_dest(BuilderOptions? options) {
+//     const defaultDestination = 'lib/src/iip_template.dart';
+//     if (options == null) return defaultDestination;
+//     if (options.config == null) return defaultDestination;
+//     return options.config['destination_file'] as String ?? defaultDestination;
+//   }
+
+//   @override
+//   Map<String, List<String>> get buildExtensions {
+//     return {
+//       '.iip.yaml': [".iip.dart"]
+//     };
 //   }
 // }
+
+// // class TemplateBuilder extends Generator {
+// //   @override
+// //   String generate(LibraryReader library, BuildStep buildStep) {
+// //     return '''
+// // // Source library: ${library.element.source.uri}
+// // const Testinggggg = 3;
+// // ''';
+// //   }
+// // }

lib/src/Core/AsyncBag.dart

@@ -23,7 +23,14 @@ class AsyncBag<T> extends AsyncReply<List<T>> {
     if (_sealedBag) return;
     _sealedBag = true;
 
-    if (_replies.length == 0) trigger(<T>[]);
+    if (_replies.length == 0) {
+      if (arrayType != null) {
+        var ar = Warehouse.createArray(arrayType as Type);
+        trigger(ar as List<T>);
+      } else {
+        trigger(<T>[]);
+      }
+    }
 
     var results = List<T?>.filled(_replies.length, null);
 
@@ -31,21 +38,23 @@ class AsyncBag<T> extends AsyncReply<List<T>> {
       var k = _replies[i];
       var index = i;
 
-      k..then((r) {
+      k
-        results[index] = r;
+        ..then((r) {
-        _count++;
+          results[index] = r;
-        if (_count == _replies.length) {
+          _count++;
-          if (arrayType != null) {
+          if (_count == _replies.length) {
-            var ar = Warehouse.createArray(arrayType as Type);
+            if (arrayType != null) {
-            results.forEach(ar.add);
+              var ar = Warehouse.createArray(arrayType as Type);
-            trigger(ar as List<T>);
+              results.forEach(ar.add);
-          } else {
+              trigger(ar as List<T>);
-            trigger(results.cast<T>());
+            } else {
+              trigger(results.cast<T>());
+            }
           }
-        }
+        })
-      })..error((ex) {
+        ..error((ex) {
-        triggerError(ex);
+          triggerError(ex);
-      });
+        });
     }
   }
 

lib/src/Core/IEventHandler.dart

@@ -1,4 +1,8 @@
+import 'dart:async';
+
 class IEventHandler {
+  final _propertyModifiedController = StreamController<String>();
+
   Map<String, List<Function>> _events = {};
 
   register(String event) {
@@ -7,6 +11,12 @@ class IEventHandler {
 
   IEventHandler() {}
 
+  Stream get properyModified => _propertyModifiedController.stream;
+
+  emitProperty(String name) {
+    _propertyModifiedController.add(name);
+  }
+
   emitArgs(String event, List arguments) {
     //event = event.toLowerCase();
 
@@ -21,13 +31,13 @@ class IEventHandler {
 
   on(String event, Function callback) {
     event = event.toLowerCase();
-    if (_events.containsKey(event)) register(event);
+    if (!_events.containsKey(event)) register(event);
     _events[event]?.add(callback);
     return this;
   }
 
-  off(event, callback) {
+  off(String event, callback) {
-    event = event.toString();
+    event = event.toLowerCase();
     if (_events.containsKey(event)) {
       if (callback != null)
         _events[event]?.remove(callback);

lib/src/Data/Codec.dart

@@ -170,9 +170,12 @@ class Codec {
 
       AsyncReply<IRecord?>? previous = null;
 
-      if (result == RecordComparisonResult.Null)
+      if (result == RecordComparisonResult.Empty) {
+        reply.seal();
+        return reply;
+      } else if (result == RecordComparisonResult.Null) {
         previous = AsyncReply<IRecord?>.ready(null);
-      else if (result == RecordComparisonResult.Record ||
+      } else if (result == RecordComparisonResult.Record ||
           result == RecordComparisonResult.RecordSameType) {
         var cs = data.getUint32(offset);
         var recordLength = cs;
@@ -203,8 +206,10 @@ class Codec {
     } else {
       AsyncReply<IRecord?>? previous = null;
       Guid? classId = null;
-
+      if (result == RecordComparisonResult.Empty) {
-      if (result == RecordComparisonResult.Null)
+        reply.seal();
+        return reply;
+      } else if (result == RecordComparisonResult.Null)
         previous = new AsyncReply<IRecord?>.ready(null);
       else if (result == RecordComparisonResult.Record) {
         var cs = data.getUint32(offset);
@@ -392,11 +397,13 @@ class Codec {
   static DC composeRecordArray<T extends IRecord>(
       List<T>? records, DistributedConnection connection,
       [bool prependLength = false]) {
-    if (records == null || records.length == 0)
+    if (records == null) // || records.length == 0)
       return prependLength ? new DC(4) : new DC(0);
 
     var rt = new BinaryList();
-    var comparsion = compareRecords(null, records[0]);
+    var comparsion = records.length == 0
+        ? RecordComparisonResult.Empty
+        : compareRecords(null, records[0]);
 
     //var type = records.getType().GetElementType();
     var isTyped = T == IRecord; // != typeof(IRecord);
@@ -960,11 +967,14 @@ class Codec {
   static DC composeResourceArray<T extends IResource>(
       List<T>? resources, DistributedConnection connection,
       [bool prependLength = false]) {
-    if (resources == null || resources.length == 0)
+    if (resources == null) // || resources.length == 0)
       return prependLength ? new DC(4) : new DC(0);
 
     var rt = new BinaryList();
-    var comparsion = compareResources(null, resources[0], connection);
+    //var comparsion = compareResources(null, resources[0], connection);
+    var comparsion = resources.length == 0
+        ? ResourceComparisonResult.Empty
+        : compareResources(null, resources[0], connection);
 
     if (T != IResource) {
       // get template
@@ -1048,7 +1058,10 @@ class Codec {
 
     AsyncReply<IResource?>? previous = null;
 
-    if (result == ResourceComparisonResult.Null)
+    if (result == ResourceComparisonResult.Empty) {
+      reply.seal();
+      return reply;
+    } else if (result == ResourceComparisonResult.Null)
       previous = new AsyncReply<IResource?>.ready(null);
     else if (result == ResourceComparisonResult.Local) {
       previous = Warehouse.getById(data.getUint32(offset));
@@ -1065,7 +1078,10 @@ class Codec {
 
       AsyncReply<IResource?>? current = null;
 
-      if (result == ResourceComparisonResult.Null) {
+      if (result == ResourceComparisonResult.Empty) {
+        reply.seal();
+        return reply;
+      } else if (result == ResourceComparisonResult.Null) {
         current = new AsyncReply<IResource?>.ready(null);
       } else if (result == ResourceComparisonResult.Same) {
         current = previous;

lib/src/Data/RecordComparisonResult.dart

@@ -3,4 +3,6 @@ class RecordComparisonResult {
   static const Record = 1;
   static const RecordSameType = 2;
   static const Same = 3;
+  static const Empty = 4;
+
 }

lib/src/Data/ResourceComparisonResult.dart

@@ -1,7 +1,7 @@
-class ResourceComparisonResult
+class ResourceComparisonResult {
-{
+  static const Null = 0;
-    static const Null = 0;
+  static const Distributed = 1;
-    static const Distributed = 1;
+  static const Local = 2;
-    static const Local = 2;
+  static const Same = 3;
-    static const Same = 3;
+  static const Empty = 4;
-}
+}

lib/src/Net/IIP/DistributedConnection.dart

@@ -22,6 +22,8 @@ SOFTWARE.
 
 */
 
+import '../Sockets/WSocket.dart';
+
 import '../../Resource/Template/TemplateDescriber.dart';
 import '../../Resource/Template/TemplateType.dart';
 import '../../Security/Authority/AuthenticationMethod.dart';
@@ -161,7 +163,7 @@ class DistributedConnection extends NetworkConnection with IStore {
   /// Send data to the other end as parameters
   /// </summary>
   /// <param name="values">Values will be converted to bytes then sent.</param>
-  SendList sendParams([AsyncReply<List<dynamic>>? reply = null]) {
+  SendList sendParams([AsyncReply<List<dynamic>?>? reply = null]) {
     return new SendList(this, reply);
   }
 
@@ -188,6 +190,11 @@ class DistributedConnection extends NetworkConnection with IStore {
 
       var domain = instance?.attributes["domain"] ?? address;
 
+      var ws = instance?.attributes.containsKey("ws") == true ||
+          instance?.attributes.containsKey("wss") == true;
+      var secure = instance?.attributes.containsKey("secure") == true ||
+          instance?.attributes.containsKey("wss") == true;
+
       if (instance?.attributes.containsKey("username") == true &&
           instance?.attributes.containsKey("password") == true) {
         var username = instance?.attributes["username"] as String;
@@ -200,7 +207,9 @@ class DistributedConnection extends NetworkConnection with IStore {
             hostname: address,
             port: port,
             passwordOrToken: password,
-            username: username);
+            username: username,
+            useWebsocket: ws,
+            secureWebSocket: secure);
       } else if (instance?.attributes.containsKey("token") == true) {
         var token = DC.stringToBytes(instance?.attributes["token"] ?? "");
         var tokenIndex = instance?.attributes["tokenIndex"] ?? 0;
@@ -210,13 +219,17 @@ class DistributedConnection extends NetworkConnection with IStore {
             hostname: address,
             port: port,
             passwordOrToken: token,
-            tokenIndex: tokenIndex);
+            tokenIndex: tokenIndex,
+            useWebsocket: ws,
+            secureWebSocket: secure);
       } else {
         return connect(
             method: AuthenticationMethod.None,
             hostname: address,
             port: port,
-            domain: domain);
+            domain: domain,
+            useWebsocket: ws,
+            secureWebSocket: secure);
       }
     }
 
@@ -231,7 +244,9 @@ class DistributedConnection extends NetworkConnection with IStore {
       String? username,
       int? tokenIndex,
       DC? passwordOrToken,
-      String? domain}) {
+      String? domain,
+      bool useWebsocket = false,
+      bool secureWebSocket = false}) {
     if (_openReply != null)
       throw AsyncException(ErrorType.Exception, 0, "Connection in progress");
 
@@ -251,19 +266,26 @@ class DistributedConnection extends NetworkConnection with IStore {
     if (_session == null)
       throw AsyncException(ErrorType.Exception, 0, "Session not initialized");
 
-    if (socket == null) socket = new TCPSocket();
+    if (socket == null) {
+      if (useWebsocket) {
+        socket = new WSocket()..secure = secureWebSocket;
+      } else
+        socket = new TCPSocket();
+    }
 
     _port = port ?? _port;
     _hostname = hostname ?? _hostname;
 
     if (_hostname == null) throw Exception("Host not specified.");
 
-    socket.connect(_hostname as String, _port).then<dynamic>((x) {
+    if (socket != null) {
-      assign(socket as ISocket);
+      socket.connect(_hostname as String, _port).then<dynamic>((x) {
-    }).error((x) {
+        assign(socket as ISocket);
-      _openReply?.triggerError(x);
+      }).error((x) {
-      _openReply = null;
+        _openReply?.triggerError(x);
-    });
+        _openReply = null;
+      });
+    }
 
     return _openReply as AsyncReply<bool>;
   }
@@ -961,7 +983,7 @@ class DistributedConnection extends NetworkConnection with IStore {
   /// <param name="args">Arguments to send.</param>
   /// <returns></returns>
   SendList sendRequest(int action) {
-    var reply = new AsyncReply<List<dynamic>>();
+    var reply = new AsyncReply<List<dynamic>?>();
     var c = _callbackCounter++; // avoid thread racing
     _requests.add(c, reply);
 
@@ -2248,10 +2270,14 @@ class DistributedConnection extends NetworkConnection with IStore {
 
     (sendRequest(IIPPacketAction.TemplateFromClassId)..addGuid(classId)).done()
       ..then((rt) {
-        _templateRequests.remove(classId);
+        if (rt != null) {
-        _templates[(rt[0] as TypeTemplate).classId] = rt[0] as TypeTemplate;
+          _templateRequests.remove(classId);
-        Warehouse.putTemplate(rt[0] as TypeTemplate);
+          _templates[(rt[0] as TypeTemplate).classId] = rt[0] as TypeTemplate;
-        reply.trigger(rt[0]);
+          Warehouse.putTemplate(rt[0] as TypeTemplate);
+          reply.trigger(rt[0]);
+        } else {
+          reply.triggerError(Exception("Null response"));
+        }
       })
       ..error((ex) {
         reply.triggerError(ex);
@@ -2301,24 +2327,28 @@ class DistributedConnection extends NetworkConnection with IStore {
           ..addUint16(l.length)
           ..addDC(l))
         .done()
-          ..then((rt) {
+      ..then((rt) {
-            List<TypeTemplate> templates = [];
+        List<TypeTemplate> templates = [];
-            // parse templates
+        // parse templates
 
-            DC data = rt[0];
+        if (rt != null) {
-            //var offset = 0;
+          DC data = rt[0];
-            for (int offset = 0; offset < data.length;) {
+          //var offset = 0;
-              var cs = data.getUint32(offset);
+          for (int offset = 0; offset < data.length;) {
-              offset += 4;
+            var cs = data.getUint32(offset);
-              templates.add(TypeTemplate.parse(data, offset, cs));
+            offset += 4;
-              offset += cs;
+            templates.add(TypeTemplate.parse(data, offset, cs));
-            }
+            offset += cs;
+          }
+        } else {
+          reply.triggerError(Exception("Null response"));
+        }
 
-            reply.trigger(templates);
+        reply.trigger(templates);
-          })
+      })
-          ..error((ex) {
+      ..error((ex) {
-            reply.triggerError(ex);
+        reply.triggerError(ex);
-          });
+      });
 
     return reply;
   }
@@ -2347,55 +2377,59 @@ class DistributedConnection extends NetworkConnection with IStore {
 
     (sendRequest(IIPPacketAction.AttachResource)..addUint32(id)).done()
       ..then((rt) {
-        // @TODO: Generator code
+        if (rt != null) {
-        DistributedResource dr;
+          // @TODO: Generator code
+          DistributedResource dr;
 
-        if (resource == null) {
+          if (resource == null) {
-          var template =
+            var template =
-              Warehouse.getTemplateByClassId(rt[0], TemplateType.Wrapper);
+                Warehouse.getTemplateByClassId(rt[0], TemplateType.Wrapper);
-          if (template?.definedType != null) {
+            if (template?.definedType != null) {
-            dr = Warehouse.createInstance(template?.definedType as Type);
+              dr = Warehouse.createInstance(template?.definedType as Type);
-            dr.internal_init(this, id, rt[1], rt[2]);
+              dr.internal_init(this, id, rt[1], rt[2]);
-          } else {
-            dr = new DistributedResource();
-            dr.internal_init(this, id, rt[1], rt[2]);
-          }
-        } else
-          dr = resource;
-
-        //var dr = resource ?? new DistributedResource(this, id, rt[1], rt[2]);
-
-        getTemplate(rt[0] as Guid)
-          ..then((tmp) {
-            //print("New template ");
-
-            var d = rt[3] as DC;
-
-            // ClassId, ResourceAge, ResourceLink, Content
-            if (resource == null) {
-              Warehouse.put(id.toString(), dr, this, null, tmp)
-                ..then((ok) {
-                  Codec.parsePropertyValueArray(d, 0, d.length, this)
-                      .then((ar) {
-                    //print("attached");
-                    dr.internal_attach(ar);
-                    _resourceRequests.remove(id);
-                    reply.trigger(dr);
-                  });
-                })
-                ..error((ex) => reply.triggerError(ex));
             } else {
-              Codec.parsePropertyValueArray(d, 0, d.length, this).then((ar) {
+              dr = new DistributedResource();
-                //print("attached");
+              dr.internal_init(this, id, rt[1], rt[2]);
-                if (ar != null) dr.internal_attach(ar);
-                _resourceRequests.remove(id);
-                reply.trigger(dr);
-              });
             }
-          })
+          } else
-          ..error((ex) {
+            dr = resource;
-            reply.triggerError(ex);
+
-          });
+          //var dr = resource ?? new DistributedResource(this, id, rt[1], rt[2]);
+
+          getTemplate(rt[0] as Guid)
+            ..then((tmp) {
+              //print("New template ");
+
+              var d = rt[3] as DC;
+
+              // ClassId, ResourceAge, ResourceLink, Content
+              if (resource == null) {
+                Warehouse.put(id.toString(), dr, this, null, tmp)
+                  ..then((ok) {
+                    Codec.parsePropertyValueArray(d, 0, d.length, this)
+                        .then((ar) {
+                      //print("attached");
+                      dr.internal_attach(ar);
+                      _resourceRequests.remove(id);
+                      reply.trigger(dr);
+                    });
+                  })
+                  ..error((ex) => reply.triggerError(ex));
+              } else {
+                Codec.parsePropertyValueArray(d, 0, d.length, this).then((ar) {
+                  //print("attached");
+                  if (ar != null) dr.internal_attach(ar);
+                  _resourceRequests.remove(id);
+                  reply.trigger(dr);
+                });
+              }
+            })
+            ..error((ex) {
+              reply.triggerError(ex);
+            });
+        } else {
+          reply.triggerError(Exception("Null response"));
+        }
       })
       ..error((ex) {
         reply.triggerError(ex);
@@ -2410,10 +2444,14 @@ class DistributedConnection extends NetworkConnection with IStore {
     sendRequest(IIPPacketAction.ResourceChildren)
       ..addUint32(resource.instance?.id as int)
       ..done().then<dynamic>((ar) {
-        var d = ar[0] as DC;
+        if (ar != null) {
-        Codec.parseResourceArray(d, 0, d.length, this).then((resources) {
+          var d = ar[0] as DC;
-          rt.trigger(resources);
+          Codec.parseResourceArray(d, 0, d.length, this).then((resources) {
-        }).error((ex) => rt.triggerError(ex));
+            rt.trigger(resources);
+          }).error((ex) => rt.triggerError(ex));
+        } else {
+          rt.triggerError(Exception("Null response"));
+        }
       });
 
     return rt;
@@ -2425,11 +2463,15 @@ class DistributedConnection extends NetworkConnection with IStore {
     sendRequest(IIPPacketAction.ResourceParents)
       ..addUint32((resource.instance as Instance).id)
       ..done().then<dynamic>((ar) {
-        var d = ar[0] as DC;
+        if (ar != null) {
-        Codec.parseResourceArray(d, 0, d.length, this)
+          var d = ar[0] as DC;
-            .then<dynamic>((resources) {
+          Codec.parseResourceArray(d, 0, d.length, this)
-          rt.trigger(resources);
+              .then<dynamic>((resources) {
-        }).error((ex) => rt.triggerError(ex));
+            rt.trigger(resources);
+          }).error((ex) => rt.triggerError(ex));
+        } else {
+          rt.triggerError(Exception("Null response"));
+        }
       });
 
     return rt;
@@ -2443,8 +2485,8 @@ class DistributedConnection extends NetworkConnection with IStore {
       (sendRequest(IIPPacketAction.ClearAllAttributes)
             ..addUint32(resource.instance?.id as int))
           .done()
-            ..then((ar) => rt.trigger(true))
+        ..then((ar) => rt.trigger(true))
-            ..error((ex) => rt.triggerError(ex));
+        ..error((ex) => rt.triggerError(ex));
     else {
       var attrs = DC.stringArrayToBytes(attributes);
       (sendRequest(IIPPacketAction.ClearAttributes)
@@ -2452,8 +2494,8 @@ class DistributedConnection extends NetworkConnection with IStore {
             ..addInt32(attrs.length)
             ..addDC(attrs))
           .done()
-            ..then<dynamic>((ar) => rt.trigger(true))
+        ..then<dynamic>((ar) => rt.trigger(true))
-            ..error((ex) => rt.triggerError(ex));
+        ..error((ex) => rt.triggerError(ex));
     }
 
     return rt;
@@ -2483,15 +2525,19 @@ class DistributedConnection extends NetworkConnection with IStore {
       (sendRequest(IIPPacketAction.GetAllAttributes)
             ..addUint32(resource.instance?.id as int))
           .done()
-            ..then((ar) {
+        ..then((ar) {
-              var d = ar[0] as DC;
+          if (ar != null) {
-              Codec.parseStructure(d, 0, d.length, this)
+            var d = ar[0] as DC;
-                ..then((st) {
+            Codec.parseStructure(d, 0, d.length, this)
-                  resource.instance?.setAttributes(st);
+              ..then((st) {
-                  rt.trigger(st);
+                resource.instance?.setAttributes(st);
-                })
+                rt.trigger(st);
-                ..error((ex) => rt.triggerError(ex));
+              })
-            });
+              ..error((ex) => rt.triggerError(ex));
+          } else {
+            rt.triggerError(Exception("Null response"));
+          }
+        });
     } else {
       var attrs = DC.stringArrayToBytes(attributes);
       (sendRequest(IIPPacketAction.GetAttributes)
@@ -2499,16 +2545,20 @@ class DistributedConnection extends NetworkConnection with IStore {
             ..addInt32(attrs.length)
             ..addDC(attrs))
           .done()
-            ..then((ar) {
+        ..then((ar) {
-              var d = ar[0] as DC;
+          if (ar != null) {
-              Codec.parseStructure(d, 0, d.length, this)
+            var d = ar[0] as DC;
-                ..then((st) {
+            Codec.parseStructure(d, 0, d.length, this)
-                  resource.instance?.setAttributes(st);
+              ..then((st) {
+                resource.instance?.setAttributes(st);
 
-                  rt.trigger(st);
+                rt.trigger(st);
-                })
+              })
-                ..error((ex) => rt.triggerError(ex));
+              ..error((ex) => rt.triggerError(ex));
-            });
+          } else {
+            rt.triggerError(Exception("Null response"));
+          }
+        });
     }
 
     return rt;
@@ -2538,10 +2588,14 @@ class DistributedConnection extends NetworkConnection with IStore {
         ..addDateTime(fromDate)
         ..addDateTime(toDate)
         ..done().then<dynamic>((rt) {
-          var content = rt[0] as DC;
+          if (rt != null) {
+            var content = rt[0] as DC;
 
-          Codec.parseHistory(content, 0, content.length, resource, this)
+            Codec.parseHistory(content, 0, content.length, resource, this)
-              .then((history) => reply.trigger(history));
+                .then((history) => reply.trigger(history));
+          } else {
+            reply.triggerError(Exception("Null response"));
+          }
         }).error((ex) => reply.triggerError(ex));
 
       return reply;
@@ -2563,10 +2617,14 @@ class DistributedConnection extends NetworkConnection with IStore {
       ..addUint16(str.length)
       ..addDC(str)
       ..done().then<dynamic>((args) {
-        var content = args[0] as DC;
+        if (args != null) {
+          var content = args[0] as DC;
 
-        Codec.parseResourceArray(content, 0, content.length, this)
+          Codec.parseResourceArray(content, 0, content.length, this)
-            .then((resources) => reply.trigger(resources));
+              .then((resources) => reply.trigger(resources));
+        } else {
+          reply.triggerError(Exception("Null response"));
+        }
       }).error((ex) => reply.triggerError(ex));
 
     return reply;
@@ -2602,11 +2660,15 @@ class DistributedConnection extends NetworkConnection with IStore {
 
     (sendRequest(IIPPacketAction.CreateResource)..addDC(pkt.toDC())).done()
       ..then((args) {
-        var rid = args[0];
+        if (args != null) {
+          var rid = args[0];
 
-        fetch(rid).then((r) {
+          fetch(rid).then((r) {
-          reply.trigger(r);
+            reply.trigger(r);
-        });
+          });
+        } else {
+          reply.triggerError(Exception("Null response"));
+        }
       });
 
     return reply;

lib/src/Net/IIP/DistributedResource.dart

@@ -22,6 +22,7 @@ SOFTWARE.
 
 */
 
+import 'dart:async';
 
 import '../../Resource/Instance.dart';
 
@@ -371,12 +372,12 @@ class DistributedResource extends IResource {
           ..addUint8(index)
           ..addDC(parameters))
         .done()
-          ..then((res) {
+      ..then((res) {
-            // not really needed, server will always send property modified,
+        // not really needed, server will always send property modified,
-            // this only happens if the programmer forgot to emit in property setter
+        // this only happens if the programmer forgot to emit in property setter
-            _properties[index] = value;
+        _properties[index] = value;
-            reply.trigger(null);
+        reply.trigger(null);
-          });
+      });
 
     return reply;
   }

lib/src/Net/SendList.dart

@@ -4,12 +4,12 @@ import 'NetworkConnection.dart';
 
 class SendList extends BinaryList {
   NetworkConnection connection;
-  AsyncReply<List<dynamic>>? reply;
+  AsyncReply<List<dynamic>?>? reply;
 
   SendList(this.connection, this.reply) {}
 
   @override
-  AsyncReply<List<dynamic>> done() {
+  AsyncReply<List<dynamic>?> done() {
     connection.send(super.toDC());
 
     return reply ?? AsyncReply.ready([]);

lib/src/Net/Sockets/WSocket.dart

@@ -0,0 +1,164 @@
+/*
+ 
+Copyright (c) 2019 Ahmed Kh. Zamil
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+*/
+
+import 'dart:io';
+
+//import 'package:web_socket_channel/io.dart' as WS;
+import 'package:web_socket_channel/io.dart';
+
+import '../../Core/ErrorType.dart';
+import '../../Core/ExceptionCode.dart';
+
+import '../../Core/AsyncException.dart';
+
+import 'ISocket.dart';
+import '../../Data/DC.dart';
+import '../NetworkBuffer.dart';
+import 'SocketState.dart';
+import 'IPEndPoint.dart';
+import '../../Core/AsyncReply.dart';
+
+class WSocket extends ISocket {
+  WebSocket? _sock;
+  IOWebSocketChannel? _channel;
+
+  NetworkBuffer receiveNetworkBuffer = new NetworkBuffer();
+
+  bool began = false;
+
+  bool secure = false;
+
+  SocketState _state = SocketState.Initial;
+
+  IPEndPoint? _localEP, _remoteEP;
+
+  bool begin() {
+    if (began) return false;
+
+    began = true;
+
+    if (_sock != null) {
+      var s = _sock as Socket;
+      _localEP = IPEndPoint(s.address.rawAddress, s.port);
+      _remoteEP = IPEndPoint(s.remoteAddress.rawAddress, s.remotePort);
+    }
+    return true;
+  }
+
+  void dataHandler(List<int> data) {
+    try {
+      if (_state == SocketState.Closed || _state == SocketState.Terminated)
+        return;
+
+      var dc = new DC.fromList(data);
+      receiveNetworkBuffer.write(dc, 0, dc.length);
+      receiver?.networkReceive(this, receiveNetworkBuffer);
+    } catch (ex) {
+      if (_state != SocketState.Closed) // && !sock.connected)
+      {
+        _state = SocketState.Terminated;
+        close();
+      }
+    }
+  }
+
+  void errorHandler(error, StackTrace trace) {
+    print(error);
+  }
+
+  void doneHandler() {
+    close();
+    //_sock?.destroy();
+  }
+
+  AsyncReply<bool> connect(String hostname, int port) {
+    var rt = new AsyncReply<bool>();
+
+    try {
+      _state = SocketState.Connecting;
+
+      WebSocket.connect("${secure ? 'wss' : 'ws'}://${hostname}:${port}'")
+          .then((s) {
+        _sock = s;
+        _state = SocketState.Established;
+        _channel = IOWebSocketChannel(s);
+        begin();
+        receiver?.networkConnect(this);
+        rt.trigger(true);
+      }).catchError((ex) {
+        close();
+        rt.triggerError(AsyncException(ErrorType.Management,
+            ExceptionCode.HostNotReachable.index, ex.toString()));
+      });
+    } catch (ex) {
+      rt.triggerError(AsyncException(ErrorType.Management,
+          ExceptionCode.HostNotReachable.index, ex.toString()));
+    }
+
+    return rt;
+  }
+
+  IPEndPoint? get localEndPoint => _localEP;
+  IPEndPoint? get remoteEndPoint => _remoteEP;
+
+  SocketState get state => _state;
+
+  TCPSocket() {
+    // default constructor
+  }
+
+  void close() {
+    if (state != SocketState.Closed && state != SocketState.Terminated)
+      _state = SocketState.Closed;
+
+    _sock?.close();
+
+    receiver?.networkClose(this);
+
+    //emitArgs("close", []);
+  }
+
+  void send(DC message, [int? offset, int? size]) {
+    if (state == SocketState.Established) {
+      if (offset != null && size == null) {
+        _channel?.sink
+            .add(message.clip(offset, message.length - offset).toList());
+      } else if (offset != null && size != null) {
+        _channel?.sink.add(message.clip(offset, size).toList());
+      } else {
+        _channel?.sink.add(message.toList());
+      }
+    }
+  }
+
+  void destroy() {
+    close();
+    emitArgs("destroy", [this]);
+  }
+
+  AsyncReply<ISocket> accept() {
+    var reply = new AsyncReply<ISocket>();
+    return reply;
+  }
+}

lib/src/Net/Sockets/Websocket.dart

@@ -1,192 +0,0 @@
-/*
- 
-Copyright (c) 2019 Ahmed Kh. Zamil
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-
-*/
-
-/*
-
-import 'dart:io';
-import 'ISocket.dart';
-import '../../Data/DC.dart';
-import '../NetworkBuffer.dart';
-import 'SocketState.dart';
-import 'IPEndPoint.dart';
-import '../../Core/AsyncReply.dart';
-
-import 'package:web_socket_channel/io.dart';
-import 'package:web_socket_channel/web_socket_channel.dart';
-import 'package:web_socket_channel/status.dart' as status;
-
-class WSSocket extends ISocket
-{
-    WebSocketChannel sock;
-
-    NetworkBuffer receiveNetworkBuffer = new NetworkBuffer();
-
-    bool began = false;
-
-    SocketState _state = SocketState.Initial;
-
-
-    IPEndPoint _localEP, _remoteEP;
-
-    bool begin()
-    {
-        if (began)
-            return false;
-
-        began = true;
-
-        _localEP = IPEndPoint(sock. address.rawAddress, sock.port);
-        _remoteEP = IPEndPoint(sock.remoteAddress.rawAddress, sock.remotePort);
-        return true;
-    }
-
-    void dataHandler(List<int> data){
-      //print(new String.fromCharCodes(data).trim());
-
-
-        try
-        {
-            if (_state == SocketState.Closed || _state == SocketState.Terminated)
-                return;
-
-
-            var dc = new DC.fromList(data);
-            receiveNetworkBuffer.write(dc, 0, dc.length);
-            emitArgs("receive", [receiveNetworkBuffer]);
-
-        }
-        catch (ex)
-        {
-            if (_state != SocketState.Closed)// && !sock.connected)
-            {
-                _state = SocketState.Terminated;
-                close();
-            }
-
-        }
-
-    }
-
-    void errorHandler(error, StackTrace trace){
-      print(error);
-    }
-
-    void doneHandler(){
-      sock.destroy();
-    }
-
-
-    AsyncReply<bool> connect(String hostname, int port)
-    {
-      var rt = new AsyncReply<bool>();
-
-        try
-        {
-            _state = SocketState.Connecting;
-
-            WebSocket()
-            prefix0.WebSocket(url) 
-            IOWebSocketChannel.
-            Socket.connect(hostname, port).then((s){
-                sock = s;
-                s.listen(dataHandler, 
-                    onError: errorHandler, 
-                    onDone: doneHandler, 
-                    cancelOnError: false);
-                _state = SocketState.Established;
-                emitArgs("connect", []);
-                begin();
-                rt.trigger(true);
-
-            }).catchError((ex){
-              close();
-              rt.triggerError(ex);
-            });
-
-            
-        }
-        catch(ex)
-        {
-            rt.triggerError(ex);
-        }
-
-        return rt;
-    }
-
-
-
-
-    IPEndPoint get localEndPoint => _localEP;
-    IPEndPoint get remoteEndPoint => _remoteEP;
-
-   
-    SocketState get state => _state;
-    
-
-    TCPSocket.fromSocket(Socket socket)
-    {
-        sock = socket;
-        //if (socket.)
-          //  _state = SocketState.Established;
-    }
-
-    TCPSocket()
-    {
-      // default constructor
-    }
-
-    void close()
-    {
-        if (state != SocketState.Closed && state != SocketState.Terminated)
-            _state = SocketState.Closed;
-
-        sock?.close();
-
-        emitArgs("close", []);
-    }
-
-    
-    void send(DC message, [int offset, int size])
-    {
-        if (state == SocketState.Established)
-          sock.add(message.toList());
-    }
-
-
-
-    void destroy()
-    {
-        close();
-        emitArgs("destroy", [this]);
-    }
-
-    AsyncReply<ISocket> accept()
-    {
-
-
-        var reply = new AsyncReply<ISocket>();
-        return reply;
-    }
-}
-*/

lib/src/Proxy/TemplateGenerator.dart

@@ -219,7 +219,7 @@ class TemplateGenerator {
       var con = await Warehouse.get<DistributedConnection>(
           (path[1] as String) + "://" + (path[2] as String),
           !isNullOrEmpty(username) && !isNullOrEmpty(password)
-              ? {username: username, password: password}
+              ? {"username": username, "password": password}
               : null);
 
       if (con == null) throw Exception("Can't connect to server");

lib/src/Resource/IResource.dart

@@ -40,4 +40,5 @@ abstract class IResource extends IDestructible {
   getProperty(String name);
 
   TemplateDescriber get template;
+
 }

lib/src/Resource/Instance.dart

@@ -386,6 +386,8 @@ class Instance extends IEventHandler {
     emitArgs("resourceModified", [_resource, pt.name, value]);
     //_resource.emitArgs("modified", [pt.name, value]);
     _resource.emitArgs(":${pt.name}", [value]);
+
+    _resource.emitProperty(pt.name);
   }
 
   /// <summary>

lib/src/Resource/Warehouse.dart

@@ -65,7 +65,8 @@ class Warehouse {
 
   static KeyList<Type, FactoryEntry> _factory = _getBuiltInTypes();
 
-  static KeyList<String, AsyncReply<IStore> Function(String, dynamic)>
+  static KeyList<String,
+          AsyncReply<IStore> Function(String, Map<String, dynamic>?)>
       protocols = _getSupportedProtocols();
 
   static bool _warehouseIsOpen = false;
@@ -222,7 +223,7 @@ class Warehouse {
   /// <param name="path"></param>
   /// <returns>Resource instance.</returns>
   static AsyncReply<T?> get<T extends IResource>(String path,
-      [attributes = null,
+      [Map<String, dynamic>? attributes = null,
       IResource? parent = null,
       IPermissionsManager? manager = null]) {
     var rt = AsyncReply<T?>();
@@ -232,8 +233,8 @@ class Warehouse {
       var url = _urlRegex.allMatches(path).first;
 
       if (protocols.containsKey(url[1])) {
-        var handler =
+        var handler = protocols[url[1]] as AsyncReply<IStore> Function(
-            protocols[url[1]] as AsyncReply<IStore> Function(String, dynamic);
+            String, Map<String, dynamic>?);
 
         var getFromStore = () {
           handler(url[2] as String, attributes)
@@ -360,7 +361,7 @@ class Warehouse {
       TypeTemplate? customTemplate = null,
       int age = 0,
       IPermissionsManager? manager = null,
-      attributes = null]) {
+      Map<String, dynamic>? attributes = null]) {
     var rt = AsyncReply<T?>();
 
     if (resource.instance != null) {
@@ -493,7 +494,7 @@ class Warehouse {
       [IStore? store = null,
       IResource? parent = null,
       IPermissionsManager? manager = null,
-      attributes = null,
+      Map<String, dynamic>? attributes = null,
       properties = null]) {
     if (_factory[T] == null)
       throw Exception("No Instance Creator was found for type ${T}");
@@ -640,15 +641,30 @@ class Warehouse {
     return true;
   }
 
-  static KeyList<String, AsyncReply<IStore> Function(String, dynamic)>
+  static KeyList<String,
+          AsyncReply<IStore> Function(String, Map<String, dynamic>?)>
       _getSupportedProtocols() {
-    var rt =
+    var rt = new KeyList<String,
-        new KeyList<String, AsyncReply<IStore> Function(String, dynamic)>();
+        AsyncReply<IStore> Function(String, Map<String, dynamic>?)>();
-    rt.add(
+    rt
-        "iip",
+      ..add(
-        (String name, attributes) =>
+          "iip",
-            Warehouse.newResource<DistributedConnection>(
+          (String name, Map<String, dynamic>? attributes) =>
-                name, null, null, null, attributes));
+              Warehouse.newResource<DistributedConnection>(
+                  name, null, null, null, attributes))
+      ..add("iipws", (String name, Map<String, dynamic>? attributes) {
+        if (attributes == null) attributes = {};
+        attributes['ws'] = true;
+        return Warehouse.newResource<DistributedConnection>(
+            name, null, null, null, attributes);
+      })
+      ..add("iipwss", (String name, Map<String, dynamic>? attributes) {
+        if (attributes == null) attributes = {};
+        attributes['wss'] = true;
+        return Warehouse.newResource<DistributedConnection>(
+            name, null, null, null, attributes);
+      });
+
     return rt;
   }
 

pubspec.lock

@@ -21,7 +21,7 @@ packages:
       name: args
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.0"
+    version: "2.3.0"
   async:
     dependency: transitive
     description:
@@ -36,13 +36,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
-  build:
-    dependency: transitive
-    description:
-      name: build
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.3"
   charcode:
     dependency: transitive
     description:
@@ -92,13 +85,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.0.1"
-  dart_style:
-    dependency: transitive
-    description:
-      name: dart_style
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.3"
   file:
     dependency: transitive
     description:
@@ -154,7 +140,7 @@ packages:
       name: json_annotation
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.1.0"
+    version: "4.4.0"
   logging:
     dependency: transitive
     description:
@@ -231,7 +217,7 @@ packages:
       name: pubspec_parse
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.2.0"
   shelf:
     dependency: transitive
     description:
@@ -260,13 +246,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.1"
-  source_gen:
-    dependency: "direct main"
-    description:
-      name: source_gen
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.5"
   source_map_stack_trace:
     dependency: transitive
     description:
@@ -359,7 +338,7 @@ packages:
     source: hosted
     version: "1.0.0"
   web_socket_channel:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: web_socket_channel
       url: "https://pub.dartlang.org"
@@ -380,4 +359,4 @@ packages:
     source: hosted
     version: "3.1.0"
 sdks:
-  dart: ">=2.12.0 <3.0.0"
+  dart: ">=2.14.0 <3.0.0"

pubspec.yaml

@@ -1,17 +1,18 @@
 name: esiur
 description: Distributed Object Framework.
-version: 1.4.1
+version: 1.4.5
 #author: Ahmed Zamil <ahmed@esiur.com>
 homepage: https://github.com/esiur/esiur-dart
 
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=2.14.0 <3.0.0"
 
 dependencies:
-  source_gen: 
+  # source_gen: ^1.0.5
-  args: #
+  args: ^2.3.0
-  pubspec_parse:
+  pubspec_parse: ^1.2.0
+  web_socket_channel: ^2.1.0
 
 dev_dependencies:
   test: