I know that setting Date is not allowed by UnityWebRequest because it is managed automatically. But even if I don't set the Date manually, UnityWebRequest doesn't add it automatically. Therefore I want to switch to other tools, such as .NET networking classes. But I noticed that this doesn't work in WebGL because IP Sockets cannot be manipulated directly. The only way I can think of at present is to customize the request through JS code in the form of jslib, but this is too troublesome. Is there any other feasible way?