werkzeug.is_resource_modified(environ, etag=None, data=None, last_modified=None)[source]

Convenience method for conditional requests.

  • environ – the WSGI environment of the request to be checked.
  • etag – the etag for the response for comparison.
  • data – or alternatively the data of the response to automatically generate an etag using generate_etag().
  • last_modified – an optional date of the last modification.

True if the resource was modified, otherwise False.