Fix the problem that aria2 status is incorrect sometimes

src/scripts/core/root.js

@@ -285,12 +285,16 @@
             });
         });
 
-        aria2TaskService.onOperationSuccess(function () {
-            $rootScope.taskContext.rpcStatus = 'Connected';
+        aria2TaskService.onConnectionSuccess(function () {
+            if ($rootScope.taskContext.rpcStatus !== 'Connected') {
+                $rootScope.taskContext.rpcStatus = 'Connected';
+            }
         });
 
-        aria2TaskService.onOperationError(function () {
-            $rootScope.taskContext.rpcStatus = 'Disconnected';
+        aria2TaskService.onConnectionFailed(function () {
+            if ($rootScope.taskContext.rpcStatus !== 'Disconnected') {
+                $rootScope.taskContext.rpcStatus = 'Disconnected';
+            }
         });
 
         aria2TaskService.onTaskCompleted(function (event) {

src/scripts/services/aria2HttpRpcService.js

@@ -77,6 +77,13 @@
                         return;
                     }
 
+                    if (context.connectionSuccessCallback) {
+                        context.connectionSuccessCallback({
+                            rpcUrl: rpcUrl,
+                            method: method
+                        });
+                    }
+
                     if (context.successCallback) {
                         context.successCallback(data.id, data.result);
                     }
@@ -94,6 +101,13 @@
                                 innerError: true
                             }
                         };
+
+                        if (context.connectionFailedCallback) {
+                            context.connectionFailedCallback({
+                                rpcUrl: rpcUrl,
+                                method: method
+                            });
+                        }
                     }
 
                     if (context.errorCallback) {

src/scripts/services/aria2RpcService.js

@@ -9,6 +9,8 @@
         var onFirstSuccessCallbacks = [];
         var onOperationSuccessCallbacks = [];
         var onOperationErrorCallbacks = [];
+        var onConnectionSuccessCallbacks = [];
+        var onConnectionFailedCallbacks = [];
         var onDownloadStartCallbacks = [];
         var onDownloadPauseCallbacks = [];
         var onDownloadStopCallbacks = [];
@@ -45,6 +47,8 @@
             var invokeContext = {
                 uniqueId: uniqueId,
                 requestBody: requestBody,
+                connectionSuccessCallback: requestContext.connectionSuccessCallback,
+                connectionFailedCallback: requestContext.connectionFailedCallback,
                 successCallback: requestContext.successCallback,
                 errorCallback: requestContext.errorCallback
             };
@@ -132,6 +136,14 @@
                 methodName: (!isSystemMethod ? getAria2MethodFullName(methodName) : methodName)
             };
 
+            context.connectionSuccessCallback = function () {
+                fireCustomEvent(onConnectionSuccessCallbacks);
+            };
+
+            context.connectionFailedCallback = function () {
+                fireCustomEvent(onConnectionFailedCallbacks);
+            };
+
             if (secret && !isSystemMethod) {
                 finalParams.push(aria2RpcConstants.rpcTokenPrefix + secret);
             }
@@ -478,6 +490,12 @@
             onOperationError: function (context) {
                 onOperationErrorCallbacks.push(context.callback);
             },
+            onConnectionSuccess: function (context) {
+                onConnectionSuccessCallbacks.push(context.callback);
+            },
+            onConnectionFailed: function (context) {
+                onConnectionFailedCallbacks.push(context.callback);
+            },
             onDownloadStart: function (context) {
                 onDownloadStartCallbacks.push(context.callback);
             },

src/scripts/services/aria2TaskService.js

@@ -844,6 +844,28 @@
                     callback: callback
                 });
             },
+            onConnectionSuccess: function (callback) {
+                if (!callback) {
+                    ariaNgLogService.warn('[aria2TaskService.onConnectionSuccess] callback is null');
+                    return;
+                }
+
+                aria2RpcService.onConnectionSuccess({
+                    callback: callback
+                });
+
+            },
+            onConnectionFailed: function (callback) {
+                if (!callback) {
+                    ariaNgLogService.warn('[aria2TaskService.onConnectionFailed] callback is null');
+                    return;
+                }
+
+                aria2RpcService.onConnectionFailed({
+                    callback: callback
+                });
+
+            },
             onFirstSuccess: function (callback) {
                 if (!callback) {
                     ariaNgLogService.warn('[aria2TaskService.onFirstSuccess] callback is null');

src/scripts/services/aria2WebSocketRpcService.js

@@ -28,6 +28,12 @@
                 context: context
             });
 
+            if (content.result && context.connectionSuccessCallback) {
+                context.connectionSuccessCallback({
+                    rpcUrl: rpcUrl
+                });
+            }
+
             if (content.result && context.successCallback) {
                 ariaNgLogService.debug('[aria2WebSocketRpcService.request] ' + (context && context.requestBody && context.requestBody.method ? context.requestBody.method + ' ' : '') + 'response success', content);
 
@@ -63,7 +69,7 @@
             }
         };
 
-        var getSocketClient = function () {
+        var getSocketClient = function (context) {
             if (socketClient === null) {
                 try {
                     socketClient = $websocket(rpcUrl);
@@ -85,6 +91,26 @@
                             processEventCallback(content);
                         }
                     });
+
+                    socketClient.onOpen(function (e) {
+                        ariaNgLogService.debug('[aria2WebSocketRpcService.onOpen] websocket is opened', e);
+
+                        if (context && context.connectionSuccessCallback) {
+                            context.connectionSuccessCallback({
+                                rpcUrl: rpcUrl
+                            });
+                        }
+                    });
+
+                    socketClient.onClose(function (e) {
+                        ariaNgLogService.warn('[aria2WebSocketRpcService.onClose] websocket is closed', e);
+
+                        if (context && context.connectionFailedCallback) {
+                            context.connectionFailedCallback({
+                                rpcUrl: rpcUrl
+                            });
+                        }
+                    });
                 } catch (ex) {
                     return {
                         success: false,
@@ -106,7 +132,9 @@
                     return;
                 }
 
-                var client = getSocketClient();
+                var client = getSocketClient({
+                    connectionFailedCallback: context.connectionFailedCallback
+                });
                 var uniqueId = context.uniqueId;
                 var requestBody = angular.toJson(context.requestBody);