If-None-Match
Summary
Makes a request conditional on a resource having changed from the specified ETag (version or representation), for refreshing caches.
Overview table
- Direction
- Request
Features
:
Syntax
If-None-Match = "*" / 1#entity-tag
Examples
If-None-Match: "xyzzy"
If-None-Match: W/"xyzzy", W/"r2d2xxxx", W/"c3piozzzz"
If-None-Match: *