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If-Modified-Since

Summary

Makes the request conditional on the server’s resource having been updated recently, for refreshing caches.

Overview table

Direction: Request

Features
:

Syntax

If-Modified-Since = HTTP-date

Examples

If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT

Related specifications

RFC7232: HTTP/1.1 Conditional Requests
: