Httpwebrequest getresponse: the remote server returned an error: (500) internal server error

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I am getting

The remote server returned an error: (500) Internal Server Error

when trying to call a REST API in Web Application using asp.net C#.

I have use try &

catch (WebException ex)

but i am getting blank message in exception response

What I have tried:

string URL = "Sample Url";
           string DATA = @"{""object"":{""name"":""Name""}}";

           HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL);
           request.Method = "POST";
           request.Headers["Authentication"] = "Bearer MyKEYVALUE";

           request.ContentType = "application/json; charset=utf-8";
           request.ContentLength = DATA.Length;
           using (Stream webStream = request.GetRequestStream())
           using (StreamWriter requestWriter = new StreamWriter(webStream, Encoding.ASCII))
           {
               requestWriter.Write(DATA);
           }

           try
           {
               WebResponse webResponse = request.GetResponse();
               using (Stream webStream = webResponse.GetResponseStream() ?? Stream.Null)
               using (StreamReader responseReader = new StreamReader(webStream))
               {
                   string response = responseReader.ReadToEnd();
                   Console.Out.WriteLine(response);
               }
           }

Posted 20-Dec-20 18:06pm

Vikram Singh Rathaur

Updated 30-Dec-20 3:19am

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Comments

Richard MacCutchan 21-Dec-20 4:25am

You need to check the logs from the server.

Vikram Singh Rathaur 21-Dec-20 5:38am

How?I don't know

Richard MacCutchan 21-Dec-20 5:47am

I have no knowledge of the server you are trying to connect with, so neither do I.

[no name] 21-Dec-20 12:47pm

The server can't handle your request and it doesn't have a "unique" error response.

You need to verify yourself that your request is "valid" (format, content, etc.)

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James Walsh Jr · Answer 1 · 2020-12-30T03:19:00

Without knowing anything about the server receiving the request, what the endpoint expects in terms of data or authentication, this is pretty much a shot in the dark.
But according to the Microsoft Docs you might try replacing the following line of code

C#

using (Stream webStream = request.GetRequestStream())
using (StreamWriter requestWriter = new StreamWriter(webStream, Encoding.ASCII))
       {
            requestWriter.Write(DATA);
       }

With this

C#

byte[] byteArray = Encoding.UTF8.GetBytes(DATA);
// Set the ContentType property of the WebRequest.
request.ContentType = "application/json";
// Set the ContentLength property of the WebRequest.
request.ContentLength = byteArray.Length;