/ rails Public
Strong ETag validators #24387
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#weak_etag=and analogous options
Response#etag=sets a weak ETag.
Strong ETags are desirable when you're serving byte-for-byte identical
responses that support Range requests, like PDFs or videos (typically
done by reproxying the response from a backend storage service).
Also desirable when fronted by some CDNs that support strong ETags
only, like Akamai.
No longer strips quotes (
") from ETag values before comparing them.
Quotes are significant, part of the ETag. A quoted ETag and an unquoted
one are not the same entity.
If-None-Match: *. Rarely useful for GET requests; meant
to provide some optimistic concurrency control for PUT requests.