Getting S3 CORS Access-Control-Allow-Origin to dynamically echo requesting domain

Question

How can I set the S3 CORS AllowedOrigin configuration such that it dynamically echos the requesting domain in the Access-Control-Allow-Origin heade

Answer 1

For me it seemed to be some kind of caching issue (even though I was not using cloudfront, only S3). Appending a random parameter to the URL fixed the issue for me, e.g.

https://s3-amazon.com/bucket/file.jpg?d=3243253456346

I also had the following CORS settings in S3:

    
        http://*
        https://*
        GET
        3000
        *