async webrequest

RequestTest.cs

using System.Collections.Generic;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.Networking;

public class RequestTest : MonoBehaviour
{
    public string url;
    public int maxTries;
    public bool requestTrigger;

    // Start is called before the first frame update
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        if (requestTrigger)
        {
            requestTrigger = false;
            Request();
        }
    }

    async void Request()
    {
        var req = new AwaitRequest(this, url,maxTries);
        var res = await req.GetResult();
        Debug.LogFormat("{0}, {1}, {2}", res.hasError, res.error, res.response);
    }
}

public class AwaitRequest {
    RequestResult result;
    private int maxTries;
    public AwaitRequest(MonoBehaviour mb, string url, int maxTries = 20) {
        mb.StartCoroutine(GetRequest(url));
        this.maxTries = maxTries;
    }

    public async Task<RequestResult> GetResult() {
        // die tries sind da damit das programm zur not stoppt
        int tries = 0;
        while(result == null && tries < maxTries) {
            tries++;
            await Task.Delay(TimeSpan.FromSeconds(0.1));
        }
        if (tries >=maxTries){
            return new RequestResult(){
                hasError = true,
                error = "exceeded max tries",
            };
        }

        return result;
    }

    IEnumerator GetRequest(string uri)
    {
        using (UnityWebRequest webRequest = UnityWebRequest.Get(uri))
        {
            // Request and wait for the desired page.
            yield return webRequest.SendWebRequest();

            if (webRequest.isNetworkError)
            {
                result = new RequestResult{
                    hasError = true,
                    error = webRequest.error
                };
            }
            else
            {
                result = new RequestResult{
                    hasError = false,
                    response = webRequest.downloadHandler.text
                };
            }
        }
    }
}

public class RequestResult {
    public string response;
    public string error;
    public bool hasError;
}