How to make a Soap call on . Net Core

Question

I am trying to consume an external service that receives an xml Soap, but always returns error 500 (Internal server error). But if I test via SOAPUI works normally.

I have tested several types of call and none of it works. Would anyone know what it can be, or how to do it the right way?

in . net core, I created an api to receive the data and convert it into the xml object and call that external service. so I set up the api with xmlformatters

services.AddControllers()
    .AddXmlSerializerFormatters()
    .AddXmlDataContractSerializerFormatters();

my first attempt was this

httpClient.DefaultRequestHeaders
    .Accept
    .Add(new MediaTypeWithQualityHeaderValue("text/xml"));

var httpRequest = new HttpRequestMessage()
{
    RequestUri = new Uri(apiUrl),
    Method = HttpMethod.Post
};

httpRequest.Content = new StringContent(xml.ToString(), Encoding.UTF8, "text/xml");

httpRequest.Headers.Clear();
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("text/xml"));
httpRequest.Content.Headers.ContentType = new MediaTypeHeaderValue("text/xml");
HttpResponseMessage response = httpClient.SendAsync(httpRequest).Result;

my 2nd attempt was:

HttpResponseMessage response = await httpClient.PostAsync(apiUrl, new StringContent(xml, Encoding.UTF8, "text/xml"));

have tried other ways too. none works.

Answer 1

Here’s an example that works on both . net framework and . net core.

string url = "";
string body = "";
string soapAction = "";
string soapXml = $@"<soap:Envelope 
                    xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" 
                    xmlns:xsd=""http://www.w3.org/2001/XMLSchema""
                    xmlns:soap=""http://schemas.xmlsoap.org/soap/envelope/"">
                    <soap:Body>
                      {body}
                    </soap:Body>
                  </soap:Envelope>";


WebRequest wr = WebRequest.Create(url);    
byte[] buff = Encoding.UTF8.GetBytes(soapXml);    
wr.Timeout = 60000;
wr.Method = "POST";
wr.ContentType = "text/xml; charset=utf-8";
wr.ContentLength = buff.Length;
wr.Headers.Add("SOAPAction", soapAction);

using (var reqStream = wr.GetRequestStream())
{
    reqStream.Write(buff, 0, buff.Length);
}

using var resp = wr.GetResponse();
using var respStream = resp.GetResponseStream();
using var reader = new StreamReader(respStream, Encoding.UTF8);
var resposta = reader.ReadToEnd();