Hi m8 thanks for the responce. I have hadded http://evo4ever.me to the filter buts same issue. I would like to show you the full code incase we are doing the headers wrong.
so we are trying to send a users video to our file server as our web server is on a much slower connection and has smaller disk space.
The idear being they can upload and it be sent straight to remote server.
What is this code supposed to do? Are you aware that that method is executed after the CORS filter has already done its work, and therefore will not have any effect on what the CORS filter does?
Anyway, I suggest setting your debugger to work, and find out what the CORS filter does. In fact, it wouldn't surprise me if the filter isn't even triggered. After all, it's the remote call to api.steampowered.com that fails. Your CORS filter only works on requests to your own site.