Not able to get response from RestAPI in .NET

Question

I would like to get response from a rest API and then print as part of my testing project.

public class MyClass {
  
  public static void CreateObject() {
    string latestVersion;
    string testStepDescription = "API_TEST: ";
    string testStepIdentifier = "TestStep";

    string uri = string.Format("https://MyAPI.Test/endpoint");
    var request = (HttpWebRequest)WebRequest.Create(uri);
    request.Method = "GET";
    request.Headers["Authorization"] = "Basic " + Convert.ToBase64String(Encoding.Default.GetBytes("user:12345")); //userID amd Password
    request.ContentType = "application/json";

    try {

      WebResponse webResponse = request.GetResponse();
      Stream webStream = webResponse.GetResponseStream();
      StreamReader responseReader = new StreamReader(webStream);
      latestVersion = responseReader.ReadToEnd();
      responseReader.Close();
    

      Output.WriteLine("RESULT = "+ latestVersion);
      Report.TestStepPass(testStepIdentifier, testStepDescription);
    }


    catch {
      latestVersion = "Not succeeded";
      Output.WriteLine("RESULT "+ latestVersion); //trying to see when the code goes to catch block
      Output.WriteLine("RESULT = Nooooo");
      Report.TestStepFail(testStepIdentifier, testStepDescription);
    }
  }

The code always goes to catch block and does not execute the try {}.
Would be grateful if anybody can help

I'm excepting to output the content from the API endpoint after using the credentials for authentication.

You get an exception object in the catch block that should tell you what the problem is. Just don't ignore it. — Ralf, Nov 06 '22 at 12:28
You are using HTTPS which uses TLS to establish an encryption mode. TLS is sent before the request is transmitted. So TLS is failing when you execute WebResponse webResponse = request.GetResponse(); — jdweng, Nov 06 '22 at 12:33
Yes I have tried that too. but still can't see where is the problem. Getting this exception actually: " System.Net.WebException: The request was aborted: Could not create SSL/TLS secure channel at System.Net.HttpWebRequest.GetResponse() at line 51 (Line: WebResponse webResponse = request.GetResponse(); )" — Andreas, Nov 06 '22 at 12:42
You need to check the response. So define the response before the try using : WebResponse webResponse = null; Than in catch put break point and check the weResponse Status which should be 200 OK if good. If you get a response than TLS passes and you should get an error usually a 400 or 500 error. The error response should indicate if the credentials passed or failed. You may get a 403 indicating the credentials failed or an error indicating the server failed while processing the request. — jdweng, Nov 06 '22 at 12:53
this can resolve your issue [The request was aborted: Could not create SSL/TLS secure channel](https://stackoverflow.com/questions/10822509/the-request-was-aborted-could-not-create-ssl-tls-secure-channel) — Pradeep Kumar, Nov 07 '22 at 06:25

score 0 · Answer 1 · answered Nov 07 '22 at 06:29

Try this One

Enable other security protocol versions to resolve the issue:

    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls
        | SecurityProtocolType.Tls11
        | SecurityProtocolType.Tls12
        | SecurityProtocolType.Ssl3;

OR

 // You must change the URL to point to your Web server.
        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
        req.Method = "GET";
        ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;


        // Skip validation of SSL/TLS certificate
        ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };


        WebResponse respon = req.GetResponse();
        Stream res = respon.GetResponseStream();

        string ret = "";
        byte[] buffer = new byte[1048];
        int read = 0;
        while ((read = res.Read(buffer, 0, buffer.Length)) > 0)
        {
            Console.Write(Encoding.ASCII.GetString(buffer, 0, read));
            ret += Encoding.ASCII.GetString(buffer, 0, read);
        }
        return ret;

For more detail Please click the below link

The request was aborted: Could not create SSL/TLS secure channel

Not able to get response from RestAPI in .NET

1 Answers1