CloudFront with S3 website as origin is not serving gzipped files

Question

AWS now supports gzipping files through CloudFront

I\'ve followed along with all of the instructions in Serving Compressed Files, and yet gzipping is not working.

Answer 1

I hit the same error today and solved it by adding a CORS rule to the S3 bucket. This rule ensures the Content-Length header is sent to Cloudfront so content can be gzipped:

S3 > Bucket > Permissions > CORS Configuration

    
        *
        GET
        3000
        Authorization
        Content-Length
    

Credit goes to Robert Ellison: http://ithoughthecamewithyou.com/post/enable-gzip-compression-for-amazon-s3-hosted-website-in-cloudfront

As far I know, this seems to be an undocumented requirement.