Athenaeum

If-None-Match

Class: \Aedart\ETags\Preconditions\Rfc9110\IfNoneMatch

Applicable

When If-None-Match header is requested.

Condition

  1. If the If-None-Match header is "*", the condition is false if current representation (Etag) exists for the target resource.
  2. If the If-None-Match header is a list Etags, the condition is false if one of the listed tags matches the Etag of the selected representation (the resource).
  3. Otherwise, the condition is true.

When it passes

When condition passes, evaluation continues to If-Range precondition.

When it fails

If request is GET or HEAD, the abortNotModified() action method is invoked.

For other Http methods, the abortPreconditionFailed() action method is invoked.

References