REST interface possibilities

Can you say something for the feature Task?

Return values or Do you have a good sample?

can you elaborate your question?

It will helpful to understand and give the better answer for you.

Sure. Thanks.

I want to send the XML via REST interface to the server, the the server send to me the answer. I check the answer.

Depend from answer good or bad (error) I need to do something.

Request--Response

Maybe you know also, how I can simulate the response.

PostMan, SoapUi or another good tool.

using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;

class ScadaClient
{
    private static readonly HttpClient client = new HttpClient();

    public static async Task<(bool success, string responseData, int statusCode)> PostXmlToScadaAsync(string url, string xmlData, string authToken)
    {
        try
        {
            if (string.IsNullOrEmpty(url))
            {
                return (false, "PostXmlToScadaAsync() Input-URL no data.", 0);
            }

            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", authToken);

            var content = new StringContent(xmlData, Encoding.UTF8, "text/xml");

            HttpResponseMessage response = await client.PostAsync(url, content);

            if (response == null)
            {
                return (false, "No answer from Scada module.", 0);
            }

            string responseData = await response.Content.ReadAsStringAsync();
            return (true, responseData, (int)response.StatusCode);
        }
        catch (Exception ex)
        {
            return (false, ex.Message, 0);
        }
    }

    public static string ReplacePlaceholder(string template, string placeholder, string value)
    {
        return template.Replace(placeholder, value);
    }
}

// Usage example:
string template = File.ReadAllText("template.xml");
string filledTemplate = ScadaClient.ReplacePlaceholder(template, "$$$MyValue$$$", "ActualValue");

(bool responseState, string responseData, int statusCode) = await ScadaClient.PostXmlToScadaAsync("http://example.com/api", filledTemplate, "your_auth_token");

if (responseState)
{
    // Process successful response
    if (statusCode == 200)
    {
        Console.WriteLine("Success: " + responseData);
    }
    else
    {
        Console.WriteLine("Unexpected success status code: " + statusCode);
    }
}
else
{
    // Handle error
    if (statusCode == 400)
    {
        Console.WriteLine("Bad Request: " + responseData);
    }
    else if (statusCode == 500)
    {
        Console.WriteLine("Internal Server Error: " + responseData);
    }
    else
    {
        Console.WriteLine("Unhandled error status code: " + statusCode);
    }
}

Use Postman to simulate the response.

1. Create a New Request:
   • Open Postman and create a new request.
   • Set the request type to POST.
   • Enter the URL of your REST endpoint.
2. Set the Headers:
   • Add a header Content-Type with the value text/xml.
   • Add an Authorization header if needed.
3. Set the Body:
   • Select the raw option for the body and set the format to XML.
   • Paste your XML content into the body.
4. Send the Request:
   • Click the Send button to send the request.
   • Check the response in the Response section of Postman.

Based on the response status code and data, you can implement logic to handle different scenarios, such as:

• Success (200 OK): Process the response data.
• Client Error (400 Bad Request): Log and handle invalid requests.
• Server Error (500 Internal Server Error): Log and handle server issues.

Thanks. Can you write more details for PostMan? I open it, then I need a Mock server? How can I test it? Where do I enter http example.com/api address? Can you publish a short step by step guide?

I think I need to create a mock server with PostMan. Then make the request and I get a response back.

The problem is how do I do that, where do I enter the test response? If it works under PostMan, I connect to my C# application and check if it works.

If you could help me with that, it would be very nice.

Postman is complicated if I have never created it before. Thank you for your support. I have another task at the moment. It would be nice to receive an answer until Friday, July 12th. Thank you.