How to pass parameters when calling viewer inside iframe

[SamWiIIiams]

I am using an iframe to display the viewer.html within a web application. The pdf itself is being served from a server so I am passing the server endpoint to the viewer file like this /pdfjs/web/viewer.html?file=${encodeURIComponent(url)}. This is all working as expected however I can't figure out how to pass parameters to pdfjs in this method. In particular, I need to set disableStream, disableAutoFetch, and httpHeaders. It appears there is such a thing as passing disableStream and disableAutoFetch as hashParams but if I understand correctly those are only supposed to be used for debugging purposes. In any event I wasn't able to get them to work. That still leaves me with the httpHeaders. These are additional authentication headers that I need pdfjs to send to my server for it to accept the request.