Einfache RestSharp Post, keepts andernfalls

Question

Ich habe folgende Schnipsel, die auf mich immer wieder versagt:

ServicePointManager.ServerCertificateValidationCallback += (o, c, ch, er) => true; 

var client = new RestClient("https://api.mydomain.com:443");  
var request = new RestRequest("/Save?api_key=myKeyHere", Method.POST); 
IRestResponse response = client.Execute(request); 
var content = response.Content; 

    if (response.ErrorException != null) { 
     Response.Write(response.ErrorException); 
    } 

ich diese Ausnahme erhalten, mit dem obigen Code:

System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags) at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) --- End of inner exception stack trace --- at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count) at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) at System.Net.TlsStream.CallProcessAuthentication(Object state) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result) at System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.ConnectStream.WriteHeaders(Boolean async) --- End of inner exception stack trace --- at System.Net.HttpWebRequest.GetRequestStream(TransportContext& context) at System.Net.HttpWebRequest.GetRequestStream() at RestSharp.Http.WriteRequestBody(HttpWebRequest webRequest) at RestSharp.Http.PostPutInternal(String method) at RestSharp.Http.AsPost(String httpMethod) at RestSharp.RestClient.DoExecuteAsPost(IHttp http, String method) at RestSharp.RestClient.Execute(IRestRequest request, String httpMethod, Func`3 getResponse) 

die gleiche URL Der Versuch, in cUrl oder in Postman (Chrome API Tester), es funktioniert. Der Endpunkt funktioniert also wie erwartet.

Aber wenn ich die API zu einem öffentlichen Dummy-Test-API ändern, bekomme ich keinen Fehler, und ich gehe durch.

Was fehlt mir?

Answer 1

Das Update war dies stattdessen zu verwenden:

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;