Unity UnityWebRequest 进行Get和Post请求

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

public class NetWorkHttp : MonoBehaviour
{
    private static NetWorkHttp instance;
    public static NetWorkHttp Instance
    {
        get
        {
            if (instance == null)
            {
                GameObject go = new GameObject("NetWorkHttp");
                DontDestroyOnLoad(go);
                instance = go.CreateOrAddComponent<NetWorkHttp>();
            }
            return instance;
        }
    }

    public void Get(string url)
    {
        UnityWebRequest unityWebRequest = UnityWebRequest.Get(url);
        StartCoroutine(GetUrl(unityWebRequest));
    }

    private IEnumerator GetUrl(UnityWebRequest unityWebRequest)
    {
        yield return unityWebRequest.SendWebRequest();
        if (unityWebRequest.isHttpError || unityWebRequest.isNetworkError)
            Debug.Log(unityWebRequest.error);
        else
        {
            Debug.Log(unityWebRequest.downloadHandler.text);
            AccountEntity entity = JsonUtility.FromJson<AccountEntity>(unityWebRequest.downloadHandler.text);
            Debug.Log(entity.pwd);
        }
    }
    private IEnumerator GetPost(UnityWebRequest unityWebRequest)
    {
        yield return unityWebRequest.SendWebRequest();
        if (unityWebRequest.isHttpError || unityWebRequest.isNetworkError)
            Debug.Log(unityWebRequest.error);
        else
        {
            Debug.Log(unityWebRequest.downloadHandler.text);
        }
    }

    public void Post(string url)
    {
        WWWForm wWWForm = new WWWForm();
        AccountEntity entity = new AccountEntity { account = "zzzsss123", pwd = "sssss123" };
        Debug.Log(JsonUtility.ToJson(entity));
        wWWForm.AddField("", JsonUtility.ToJson(entity));
        UnityWebRequest unityWebRequest = UnityWebRequest.Post(url,wWWForm);
        StartCoroutine(GetPost(unityWebRequest));
    }
}