HTTP Status Codes
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1xx Informational Status Codes
2xx Successful Status Codes
| Codes | Titres | Explications |
|---|---|---|
| 200 | OK | |
| 204 | No Content |
3xx Redirection Status Codes
| Codes | Titres | Explications |
|---|---|---|
| 301 | Moved Permanently | |
| 302 | Found | The requested resource resides temporarily in another location, but it can still be found at the requested URI. |
| 304 | Not Modified | If the client has performed a conditional GET request and access is allowed, but the document has not been modified, the server should respond with this status code. |
4xx Client Error Status Codes
| Codes | Titres | Explications |
|---|---|---|
| 400 | Bad Request | The server cannot or will not process the request due to an apparent client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing) |
| 401 | Unauthorized | login / password incorrect |
| 403 | Forbidden | règle interdisant l'accès |
| 404 | Not Found | l'uri demandé ne correspond à aucun fichier |
| 422 | Unprocessable Entity | The request was well-formed but was unable to be followed due to semantic errors. (ex: invalid data) |
5xx Server Error Status Codes
| Codes | Titres | Explications |
|---|---|---|
| 500 | Internal server error | ??? |
| 502 | Bad Gateway | Mauvaise réponse envoyée à un serveur intermédiaire par un autre serveur |
| 503 | Service Unavailable | le serveur ne peut traiter la requête car il est momentanément surchargé |
Spécifiques à Nginx
| Codes | Titres | Explications |
|---|---|---|
| 444 | No Response | Used in Nginx logs to indicate that the server has returned no information to the client and closed the connection (useful as a deterrent for malware). |
| 494 | Request Header Too Large | Nginx internal code similar to 431 (Request Header Fields Too Large) but it was introduced earlier. |
| 495 | Cert Error | Nginx internal code used when SSL client certificate error occurred to distinguish it from 4XX in a log and an error page redirection. |
| 496 | No Cert | Nginx internal code used when client didn't provide certificate to distinguish it from 4XX in a log and an error page redirection. |
| 497 | HTTP to HTTPS | Nginx internal code used for the plain HTTP requests that are sent to HTTPS port to distinguish it from 4XX in a log and an error page redirection. |
| 499 | Client Closed Request | Used in Nginx logs to indicate when the connection has been closed by client while the server is still processing its request, making server unable to send a status code back. |
| 502 | Bad Gateway | Le service Fast CGI (pour PHP, ASP ou autres) n'est pas lancé. |
