Certain Unicode characters result in an empty XHR request body

[SheaSmith]

When attempting to use certain unicode characters in the request body of a XHR, the XHR sends an empty string instead. This is particularly problematic for retrieving FairPlay keys, as some providers may require raw binary strings, rather than the default Base64 supplied.

Example code:

var keyRequest = new XMLHttpRequest();
keyRequest.open("POST", "url");
keyRequest.send(<binary data>);

[SheaSmith]

Can workaround as we can use a simple reverse proxy. Essentially we post the Base64 body to the server, which then decodes it to binary, forwards the request onto the original server and then returns the response to the Apple TV. Not ideal, but for something as lightweight and infrequently used (compatively speaking) as a DRM server, it should be fine.