Refer to the table below for the different status codes and their meaning.
| Status Code | Meaning |
|---|---|
| (1xx) Informational codes | |
| 100 | Continue after ICAP preview |
| 101 | Ready to switch protocol to one requested by client |
| (2xx) Success codes | |
| 200 | The request has succeeded. The information returned depends on the method. |
| 201 | Created. The new resource is created. The URI is specified in the body. |
| 202 | Accepted. The request was accepted but the processing has not being completed. |
| 204 | No modifications needed. |
| (4xx) Client error codes | |
| 400 | Bad request |
| 404 | ICAP Service not found. |
| 405 | Method not allowed for service (e.g., RESPMOD requested for service that supports only REQMOD) |
| 408 | Request timeout. ICAP server gave up waiting for a request from an ICAP client. |
| (5xx) Server error codes | |
| 500 | Server error. Error on the ICAP server, such as "out of disk space" |
| 501 | Method not implemented. This response is illegal for an OPTIONS request since implementation of OPTIONS is mandatory. |
| 502 | Bad gateway. This is an ICAP proxy and proxying produced an error. |
| 503 | Service overloaded. The ICAP server has exceeded a maximum connection limit associated with this service; the ICAP client should not exceed this limit in the future. |
| 505 | ICAP version not supported by server |