Passkey AASA File content type

Hello Apple,

We are developing Passkey FIDO login feature. It works fine in developer mode but in the production release, ASAuthorizationController returns error saying the "AppID is not associated with the domain". We verified the AASA file and it contains the AppID in webcredentials in the AASA file. However, our AASA file content type is octet-stream instead of JSON. Our question is if this content-type is the root cause of the error?

Thank you,

Replies

The content-type of the response doesn't matter. It's likely this is a difference between what's hosted on your website compared to what's cached in Apple's CDN. A lot of useful information about the CDN and debugging tips are described in the What's new in Universal Links WWDC session.