Last-Modified Header
- Category :
- Concept
- Tags :
- general_computing_gleanings
- http
- http_headers
- http_response_headers
- representation_header
- l
- Created:
Table of Contents
About
The HTTP Last-Modified response header contains a date and time when
the origin server believes the resource was last modified; it is used
as a validator in conditional requests (If-Modified-Since) to
determine if a requested resource is the same as one already stored by
the client; it is less accurate than an ETag for determining file
contents, but can be used as a fallback mechanism if ETags are
unavailable1.
Anki
Links
References
MDN. “Last-Modified header”. Available at: https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Last-Modified. (Accessed: ). ↩︎
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Other Articles
- Published:
- conditional requests
- Category: Concept
- Published:
- Network layer
- Category: Concept