The HTTP Cache-Control header holds directives (instructions) in both requests and responses that control caching in browsers and shared caches (e.g., Proxies, CDNs).
Cache directive "no-cache" An explaination of the HTTP Cache-Control header The Cache-Control header is used to specify directives for caching mechanisms in both HTTP requests and responses. A typical header looks like this Cache-Control: public, max-age=10 public Indicates that the response may be cached by any cache. private
I found that Chrome responds better to Cache-Control: no-cache (100% conditional requests afterwards). "no-store" sometimes loaded from cache without even attempting a conditional request. Firefox responds better to "no-store" but still sometimes loads from cache if you reload immediately afterwords. What a mess!
Remarks This property represents the "no-cache" directive in a cache-control header field on an HTTP request or HTTP response. When the NoCache property is set to true present in a HTTP request message, an application should forward the request toward the origin server even if it has a cached copy of what is being requested.
Add -H "Cache-Control: no-cache" to bypass CDN caches and hit the origin directly. In browser DevTools, open the Network tab, select the request, and check the Response Headers section.
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