public static THttpDown DoGet(string url, CallBackArg <THttpDown> callback)
{
bool flag = THttpDown.IsDown(url, "");
THttpDown result;
if (flag)
{
Debug.Log(url + "正在下载中，请不 要重复下载！");
result = null;
}
else
{
THttpDown hNHttpDwon = new THttpDown(url, callback);
THttpDown.AddDown(hNHttpDwon);
result = hNHttpDwon;
}
return(result);
}
