abp cli generate proxy host connection error added.

framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/Commands/GenerateProxyCommand.cs

@@ -57,9 +57,19 @@ namespace Volo.Abp.Cli.Commands
             var uiFramework = GetUiFramework(commandLineArgs);
 
             WebClient client = new WebClient();
-            string json = client.DownloadString(apiUrl);
-            //var sr = File.OpenText("api-definition.json");
-            //var json = sr.ReadToEnd();
+            string json = "";
+            try
+            {
+                json = client.DownloadString(apiUrl);
+            }
+            catch (Exception ex)
+            {
+                throw new CliUsageException(
+                           "Cannot connect to the host {" + apiUrl + "}! Check that the host is up and running." +
+                           Environment.NewLine + Environment.NewLine +
+                           GetUsageInfo()
+                       );
+            }
 
             Logger.LogInformation("Downloading api definition...");
             Logger.LogInformation("Api Url: " + apiUrl);
@@ -107,7 +117,7 @@ namespace Volo.Abp.Cli.Commands
                     serviceFileText.AppendLine("");
                     serviceFileText.AppendLine("@Injectable({providedIn: 'root'})");
                     serviceFileText.AppendLine("export class [controllerName]Service {");
-                    serviceFileText.AppendLine("  apiName = '"+ apiName + "';");
+                    serviceFileText.AppendLine("  apiName = '" + apiName + "';");
                     serviceFileText.AppendLine("");
                     serviceFileText.AppendLine("  constructor(private restService: RestService) {}");
                     serviceFileText.AppendLine("");
@@ -201,7 +211,8 @@ namespace Volo.Abp.Cli.Commands
                                     {
                                         secondTypeList.Add(type);
                                     }
-                                    else {
+                                    else
+                                    {
                                         firstTypeList.Add(type);
                                     }
                                     break;
@@ -435,7 +446,7 @@ namespace Volo.Abp.Cli.Commands
 
             }
 
-            var typeModelName = typeName.Replace("<", "").Replace(">", "").Replace("?","").PascalToKebabCase() + ".ts"; 
+            var typeModelName = typeName.Replace("<", "").Replace(">", "").Replace("?", "").PascalToKebabCase() + ".ts";
 
             var path = $"src/app/{rootPath}/shared/models/{typeModelName}";