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About
The HTTP If-None_Match request header makes a request conditional,
and applies the method only if the stored resource doesn’t match any
of the given ETags1.
Anki
Links
References
MDN . “If-None-Match header”. Available at: https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/If-None-Match. (Accessed: ). ↩︎