113 Heuristic Expiration

The HTTP 113 Heuristic Expiration warning code indicates a cache heuristically chose a freshness lifetime greater than 24 hours, and the age of the response also exceeds 24 hours. The code is attached to the Warning header in the HTTP response.

Example

Warning: 113 www.example.re "Heuristic Expiration"

See also

• RFC 7234: HTTP Caching (obsoleted)
• RFC 9111: HTTP Caching
• Warning
• Cache-Status
• Caching
• HTTP status codes