由于未处理的异常，进程已终止。 System.Net.HttpWebRequest.GetResponse() ews 异常

Question

大家好，我遇到了这个异常，它正在停止我的服务。请帮助以下是完整的堆栈跟踪。

Description: The process was terminated due to an unhandled exception. Exception Info: System.Net.WebException at System.Net.HttpWebRequest.GetResponse() at Microsoft.Exchange.WebServices.Data.EwsHttpWebRequest.Microsoft.Exchange.WebServices.Data.IEwsHttpWebRequest.GetResponse() at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.GetEwsHttpWebResponse(Microsoft.Exchange.WebServices.Data.IEwsHttpWebRequest)

Exception Info: Microsoft.Exchange.WebServices.Data.ServiceRequestException at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.GetEwsHttpWebResponse(Microsoft.Exchange.WebServices.Data.IEwsHttpWebRequest) at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.ValidateAndEmitRequest(Microsoft.Exchange.WebServices.Data.IEwsHttpWebRequest ByRef) at Microsoft.Exchange.WebServices.Data.HangingServiceRequestBase.InternalExecute() at Microsoft.Exchange.WebServices.Data.StreamingSubscriptionConnection.Open() at ERSupportGetOutlookEmail.EmailExchange.OnDisconnect(System.Object, Microsoft.Exchange.WebServices.Data.SubscriptionErrorEventArgs) at Microsoft.Exchange.WebServices.Data.StreamingSubscriptionConnection.InternalOnDisconnect(System.Exception) at Microsoft.Exchange.WebServices.Data.StreamingSubscriptionConnection.OnRequestDisconnect(System.Object, Microsoft.Exchange.WebServices.Data.HangingRequestDisconnectEventArgs) at Microsoft.Exchange.WebServices.Data.HangingServiceRequestBase.InternalOnDisconnect(Microsoft.Exchange.WebServices.Data.HangingRequestDisconnectReason, System.Exception) at Microsoft.Exchange.WebServices.Data.GetStreamingEventsResponse.ReadElementsFromXml(Microsoft.Exchange.WebServices.Data.EwsServiceXmlReader) at Microsoft.Exchange.WebServices.Data.ServiceResponse.LoadFromXml(Microsoft.Exchange.WebServices.Data.EwsServiceXmlReader, System.String) at Microsoft.Exchange.WebServices.Data.GetStreamingEventsRequest.ParseResponse(Microsoft.Exchange.WebServices.Data.EwsServiceXmlReader) at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.ReadResponse(Microsoft.Exchange.WebServices.Data.EwsServiceXmlReader) at Microsoft.Exchange.WebServices.Data.HangingServiceRequestBase.ParseResponses(System.Object) at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(System.Object) at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem() at System.Threading.ThreadPoolWorkQueue.Dispatch() at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()

这是我的代码，请查看这个

            public async System.Threading.Tasks.Task Watch()
            {
                //Configuration options for a public client application (desktop/mobile app)
                var pcaOptions = new PublicClientApplicationOptions
                {
                    ClientId = ConfigurationManager.AppSettings["appId"],
                    TenantId = ConfigurationManager.AppSettings["tenantId"]
                };

                //Creates a PublicClientApplicationBuilder from a clientID.
                var pca = PublicClientApplicationBuilder
                .CreateWithApplicationOptions(pcaOptions).Build();

                //access permission.
                var ewsScopes = new string[] { "https://outlook.office.com/EWS.AccessAsUser.All" };

                try
                {

                    // Make the interactive token request
                    var authResult = await pca.AcquireTokenByUsernamePassword(ewsScopes, EmailID, ConvertToSecureString(Password)).ExecuteAsync();
                    //var authResult = await pca.AcquireTokenInteractive(ewsScopes).ExecuteAsync();

                    // Configure the ExchangeService with the access token
                    ewsClient = new ExchangeService();
                    ewsClient.Url = new Uri("https://outlook.office365.com/EWS/Exchange.asmx");
                    ewsClient.Credentials = new OAuthCredentials(authResult.AccessToken);
                   
                    Console.WriteLine("New Email details will display below:-");
                    // Make an EWS call                                
                    CreateStreamingSubscription(); //Creating subscription.               
                }
                catch (MsalException ex)
                {
                    Email.onErrorOccur(ex.Message, "EmailExchange Watch event MsalException", ex.StackTrace);                    
                }
                catch (Exception ex)
                {
                    Email.onErrorOccur(ex.Message, "EmailExchange Watch event", ex.StackTrace);                    
                }

            }

Answer 1

在您发布的导致异常的 CreateStreamingSubscription 中的代码中，它只是被您发布的代码块捕获，该代码块不执行任何 Exchange 请求，仅进行身份验证。您能否提供有关何时发生的更多详细信息，例如，代码可以工作一段时间，然后发生这种情况，还是只是不起作用？如果它只是不起作用可能 TLS 1.2 所以我建议包括在

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12

由于未处理的异常，进程已终止。 System.Net.HttpWebRequest.GetResponse() ews 异常

The process was terminated due to an unhandled exception. System.Net.HttpWebRequest.GetResponse() exception in ews

c#

outlook

console-application

threadpool

exchangewebservices