Amazon S3: Cache-Control and Expiry Date difference and setting trough REST API

Question

I want to enhance my sites loading speed, so I use http://gtmetrix.com/, to check what I could improve. One of the lowest rating I get for \"Leverage browser caching\". I fo

Answer 1

Your files won't be deleted, just not cached after the expiration date.

The Amazon docs say:

After the expiration date and time in the Expires header passes, CloudFront gets the object again from the origin server every time an edge location receives a request for the object.

We recommend that you use the Cache-Control max-age directive instead of the Expires header field to control object caching. If you specify values both for Cache-Control max-age and for Expires, CloudFront uses only the value of max-age.