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req.hash_always_miss

BOOL, can be read and set, but not unset.

Available inrecv

Forces the request to be treated as a cache miss regardless of whether we have a copy of the object in cache.

Setting this in vcl_recv differs from return(pass) in that Request collapsing is performed when "Always miss" is set, allowing simultaneous requests for the same object to be collapsed into a single request to origin. In contrast, when using pass mode, request collapsing is disabled.

When enabled, this mode also makes stale objects unusable, thereby disabling the effects of the stale-while-revalidate and stale-if-error Cache-Control directives.

Try it out

req.hash_always_miss is used in the following code examples. Examples apply VCL to real-world use cases and can be deployed as they are, or adapted for your own service. See the full list of code examples for more inspiration.

Click RUN on a sample below to provision a Fastly service, execute the code on Fastly, and see how the function behaves.