Spark.getData() on a callback "REQUEST_HEADERS" field is empty. It should have the request data from the server calling the callback.
It doesn't have Request URL, Content-Type, Content-Length or any other request headers.
Would love this feature
I'm running into this issue as well; is there any progress on this? I need to verify an OAuth token coming from an Authorization header, and I can't obtain it.
Thanks for logging this feature request. I'll run it by the dev team. Do you have a particular use case for it ?
Important data from xsolla is sent in the headers as well.
I want to verify what server is requesting the callback page.
So I can choose to allow or deny it.
The extra header info would be very useful in verifying it as well.