unity如何Get和Post

    IEnumerator Get(string url)
    {
        UnityWebRequest req = UnityWebRequest.Get(url);
        req.SetRequestHeader("Content-Type", "application/json");
        req.SetRequestHeader("Accept", "application/json");
        yield return req.SendWebRequest();
        if (req.isHttpError || req.isNetworkError)
        {
            Debug.Log(req.error);
        }
        else
        {
            Debug.Log(req.downloadHandler.text);

        }
    }

IEnumerator Post(string url, string jsonStr)
    {
        byte[] bytes = Encoding.UTF8.GetBytes(jsonStr);
        UnityWebRequest request = new UnityWebRequest(url, UnityWebRequest.kHttpVerbPOST)
        {
            uploadHandler = new UploadHandlerRaw(bytes),
            downloadHandler = new DownloadHandlerBuffer()
        };
        request.SetRequestHeader("Content-Type", "application/json");
        request.SetRequestHeader("Accept", "application/json");
        yield return request.SendWebRequest();
        if (request.isHttpError || request.isNetworkError)
        {
            Debug.LogError(request.error);
        }
        else
        {
 
            Debug.Log(request.downloadHandler.text);
        }
    }