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What is must-revalidate in cache-control?
must-revalidate. Indicates that once a resource becomes stale, caches must not use their stale copy without successful validation on the origin server. proxy-revalidate. Like must-revalidate , but only for shared caches (e.g., proxies). Ignored by private caches.
What does cache-control no cache mean?
Cache-Control: No-Cache The no-cache directive means that a browser may cache a response, but must first submit a validation request to an origin server.
How do I disable Postman cache?
Instead, you need to go to ‘Settings’ (top right) and then turn off ‘Send no-cache’ header option.
How to set cache control to no store?
The first line sets Cache-control to no-cache, and the second line adds the other attributes no-store, must-revalidate. This may not be the only way, but does provide an alternative method if the more straightforward Response.AppendHeader (“Cache-control”, “no-cache, no-store, must-revalidate”); fails.
When do I need to revalidate my cached response?
In fact, it means “revalidate with server” before using any cached response you may have, on every request. must-revalidate, on the other hand, only needs to revalidate when the resource is considered stale.
When does a no store Directive apply to a cache?
The no-store directive applies to the entire message, and MAY be sent either in a response or in a request. If sent in a request, a cache MUST NOT store any part of either this request or any response to it.
What happens if there is no cache in response?
Even if “no-cache” is in response, intermediate cache server can still save the content to non-volatile storage. The intermediate cache server will decide whether using the saved content for following request. However, if “no-store” is in the response, the intermediate cache sever is not supposed to store the content.