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Using CDN like Cloudflare with mod_rewrite to save bandwidth

I know CDNs like Cloudflare save bandwidth by caching static files as images, JS, and CSS files.

I have a script that generates images on the fly and its location looks something like this:

http://domain.com/image.php?id=1

With id being the image id. Cloudflare won't cache these images due to the dynamic URL. If I add a mod rewrite rule to rewrite the URL to become something like:

http://domain.com/images/1

or

http://domain.com/images/1.jpg

Will CloudFlare cache the images in this case or the images have to actually be real files that reside in directories?

Solution

  • One way to check is to open a page containing an image and then use Chrome Web Inspector. Go to Network > Images, select an image, then under Header > Response header look for cf-cache-status.

    If you see cf-cache-status: HIT then the image or resource is being cached by CloudFlare. I think the alternative is 'MISS"

    Good luck

    enter image description here