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我想使用来自统一 2107.4 的 UnityWebRequest 从我的服务器发送和获取数据

我尝试使用此处的代码 

using System;
using System.Collections;
using UnityEngine;
using UnityEngine.Networking;

public class WebRequestExample : MonoBehaviour
{
    // Where to send our request
    const string DEFAULT_URL = "https://jsonplaceholder.typicode.com/todos/1";
    string targetUrl = DEFAULT_URL;

    // Keep track of what we got back
    string recentData = "";

    void Awake()
    {
        this.StartCoroutine(this.RequestRoutine(this.targetUrl, this.ResponseCallback));
    }

    // Web requests are typially done asynchronously, so Unity's web request system
    // returns a yield instruction while it waits for the response.
    //
    private IEnumerator RequestRoutine(string url, Action<string> callback = null)
    {
        // Using the static constructor
        var request = UnityWebRequest.Get(url);

        // Wait for the response and then get our data
        yield return request.SendWebRequest();
        var data = request.downloadHandler.text;

        // This isn't required, but I prefer to pass in a callback so that I can
        // act on the response data outside of this function
        if (callback != null)
            callback(data);
    }

    // Callback to act on our response data
    private void ResponseCallback(string data)
    {
        Debug.Log(data);
        recentData = data;
    }

    // Old fashioned GUI system to show the example
    void OnGUI()
    {
        this.targetUrl = GUI.TextArea(new Rect(0, 0, 500, 100), this.targetUrl);
        GUI.TextArea(new Rect(0, 100, 500, 300), this.recentData);
        if (GUI.Button(new Rect(0, 400, 500, 100), "Resend Request"))
        {
            this.StartCoroutine(this.RequestRoutine(targetUrl, this.ResponseCallback));
        }
    }
}

和cs_getannounce，cs_login，cs_zonelist是我试图访问的链接

它应该通过提供的所有三个链接获取数据，但只有 cs_getannounce 和 cs_login 可以，而 cs_zonelist 不能（得到错误 403）。我也尝试使用 unity 2018，但没有运气。当我使用统一 2019 时，它可以工作。但是我真的要用2017

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