If-Modified-Since Header
- Category :
- Concept
- Tags :
- general_computing_gleanings
- http
- http_headers
- http_request_headers
- i
- Created:
Table of Contents
About
The HTTP If-Modified-Since request header makes a request
conditional; the server sends back the requested resource, with a 200
status, only if it has been modified after the date in the
If-Modified-Since header; if the resource has not been modified
since, the response is 304 without any body, and the Last-Modified
response header of the previous request contains the date of the last
modification1.
Anki
Links
References
MDN. “If-Modified-Since header”. Available at: https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/If-Modified-Since. (Accessed: ). ↩︎
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