Unity发送Post请求

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

public class PostMsg : MonoBehaviour
{
    private string postUrl = "https://api.yeeloc.com/open-api/api-cgi/iot/lock/action";      
    string jsonData = "{\"sn\":\"bbbbb\",\"action\":\"lock\"}";//需要上传的json数据
    byte[] bodyRaw;
    [System.Obsolete]
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.UpArrow))
        {
            StartCoroutine(WebPost());
        }        
    }
    [System.Obsolete]
    IEnumerator WebPost(string msg)
    {      
        UnityWebRequest uwr = new UnityWebRequest(postUrl, "POST");           
        bodyRaw = Encoding.UTF8.GetBytes(jsonData);
        uwr.uploadHandler = new UploadHandlerRaw(bodyRaw);
        uwr.downloadHandler = new DownloadHandlerBuffer();
        //如果有请求头，根据具体字段要求设置
        uwr.SetRequestHeader("Authorization", "请求头token");
        uwr.SetRequestHeader("Content-Type", "application/json");//数据格式
        yield return uwr.SendWebRequest();
        if (uwr.isHttpError || uwr.isNetworkError)
        {
            Debug.LogError("Login Error: " + uwr.error);
        }
        else
        {
            string receiveContent = uwr.downloadHandler.text;
            Debug.Log(receiveContent);
        }
    }
}