unity中wwwform提交时报400 Bad Request错误怎么解决?

IEnumerator DecorateFun(string Key1, int Price1, string Key2, int Price2, string Url)
{

WWWForm newForm = new WWWForm();
newForm.AddField(Key1, Price1);
newForm.AddField(Key2, Price2);

WWW www = new WWW(Url, newForm);
Debug.Log(newForm);
yield return www;
Debug.Log(Url);
if (www.error != null)
{
Debug.Log("111111111111111111111111 " + www.error);

    }

StartCoroutine(DecorateFun("uId",playerInfo.ID, "buySum", 3, analysisJson.PathuId(analysisJson.BuyGrassPath)+ "&buySum = 30"));

https://blog.csdn.net/Q594076608/article/details/50353205