远程服务器返回错误：（500）内部服务器错误Web服务

Question

I am trying to send a SOAP XML to oracle webservice. Service reference does not work well so I decide to use webrequest but I am getting an errror "The remote server returned an error: (500) Internal Server Error. "

   string envelope = System.IO.File.ReadAllText("test.xml");
    byte[] byteArray = Encoding.UTF8.GetBytes(envelope);

    byte[] toEncodeAsBytes = System.Text.ASCIIEncoding.ASCII.GetBytes("xxxxx" + ":" + "xxxxx");
    string credentials = System.Convert.ToBase64String(toEncodeAsBytes);

    HttpWebRequest request =(HttpWebRequest)WebRequest.Create("https://ehpq-test.fa.em2.oraclecloud.com/fscmService/SupplierServiceV2");

    request.Method = "POST";
    request.ContentType = "text/xml;charset=UTF-8";
    request.ContentLength = byteArray.Length;

    request.Headers.Add("Authorization", "Basic " + credentials);

    request.Headers.Add("SOAPAction", "https://ehpq-test.fa.em2.oraclecloud.com/fscmService/SupplierServiceV2");

    Stream dataStream = request.GetRequestStream();
    dataStream.Write(byteArray, 0, byteArray.Length);
    dataStream.Close();

    using (WebResponse response = request.GetResponse())
    {
        using (Stream stream = response.GetResponseStream())
        {
            var doc = XDocument.Load(stream);
        }
    }

Answer 1

It can be very difficult to diagnose the problem that has occurred in the server from your client code. If you have access to the server, you can view the error logs for the web server.

For instance, with Nginx on Ubuntu you would want to navigate to /var/log/nginx directory and then either use nano or tail -f to view the full contents of the file error.log or similarly named. This would be the place that lists the exact cause of the server to throw a 500. It may not be the case that your request is malformed, but that the endpoint is misconfigured server-side.