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amazon s3 - Cache busting without query parameter on S3

I'm using Digital Ocean Spaces (S3) to store static assets. These assets are used on customer's websites where they've embedded them (like Google Analytics).

What I'd like to do is bust the cache on each deployment. Given customers have already added the URL to the script to their website I can not append a query parameter to bust the cache.

What I've done now is after I upload a file to Spaces, I use the API to clear the cache using https://api.digitalocean.com/v2/cdn/endpoints/DISK_ID/cache.

But if I'm correct this will not bust the cache on the user's client. Surely setups like Google Analytics and other scripts that are added to customer's websites have the same problem. Curious to understand how I can achieve cache busting in this scenario.


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