Hypertext Transfer Protocol (HTTP) Warn Codes
Created
- 2014-02-17
Last Updated
- 2022-06-08
Available Formats
HTTP Warn Codes
Registration Procedure(s)
- IETF Review
Reference
- RFC 7234: Hypertext Transfer Protocol (HTTP/1.1): Caching
Note
The Warning header field (and the warn codes that it uses) has been obsoleted for HTTP per RFC 9111.
Available Formats
| Warn Code | Short Description | Reference |
|---|---|---|
| 110 | Response is Stale | RFC 7234, Section 5.5.1 |
| 111 | Revalidation Failed | RFC 7234, Section 5.5.2 |
| 112 | Disconnected Operation | RFC 7234, Section 5.5.3 |
| 113 | Heuristic Expiration | RFC 7234, Section 5.5.4 |
| 199 | Miscellaneous Warning | RFC 7234, Section 5.5.5 |
| 214 | Transformation Applied | RFC 7234, Section 5.5.6 |
| 299 | Miscellaneous Persistent Warning | RFC 7234, Section 5.5.7 |