I'm using Azure CDN to retrieve files from Azure blob storage. After updating a file in my storage, checking the file with storage explorer, and purging the CDN (purge all), I try to refresh the plain-file within my browser.
In the response I see x-cache: HIT, which indicates that it's still loaded from the CDN cache. How is this possible after purging?
I tried purging using the Azure Portal as well as Unpublish-AzureRmCdnEndpointContent using powershell.
You may need some time to wait for purging requests. Also, you must note that there still are downstream caches even you purging all.
Note that purging only clears the cached content on the CDN edge servers. Any downstream caches, such as proxy servers and local browser caches, may still hold a cached copy of the file. It's important to remember this when you set a file's time-to-live. You can force a downstream client to request the latest version of your file by giving it a unique name every time you update it, or by taking advantage of query string caching.
You can get more details from Purge an Azure CDN endpoint
