Setting XMLHttpRequest.withCredentials=true on requests made with UnityWebRequest

Hello,

I'm using Unity 2019.2.15f and I have a cookies issue when testing the final webAssembly. The backend is splitted in multiple subdomains and the session cookies are not sent when sending a request using UnityWebRequest.

I'm looking for a way to manually assign properties to the XmlHttpRequest instance used to send the request to the server.

I'm confident that adding this line would fix my issue :

Code (JavaScript):

1. request.withCredentials = true;

However, the only examples I can find are old and not compatible with WebAssembly export format.

Someone has an idea?

Thanks in advance!

 

Unity uses XMLHttpRequest, you could override the open function in JS like this:

Code (JavaScript):

1. XMLHttpRequest.prototype.originalOpen = XMLHttpRequest.prototype.originalOpen || XMLHttpRequest.prototype.open;
2. XMLHttpRequest.prototype.open = function (...args) {
3.     this._url = args[1];
4.     if (this._url.indexOf("API_URL") != -1)
5.         this.withCredentials = true;
6.     this.originalOpen(...args);
7. }

Just replace API_URL with your API Url.
Note: put this script anywhere in the WebGL page.

 

Doesn't seem to work anymore, if I put a log in the fonction it does fire a few times when it start but no longer once the app is fully loaded and send requests