5xx Erreur du serveur (Server Error)

Le serveur n'a pas pu traiter une requête valide. 500, 502 et 503 en sont les exemples types.

500Internal Server Error FréquentA generic catch-all: the server hit an unexpected condition and could not complete the request.501Not ImplementedThe server does not support the functionality required to fulfill the request.502Bad Gateway FréquentA gateway or proxy received an invalid response from an upstream server.503Service Unavailable FréquentThe server is temporarily unable to handle the request due to overload or maintenance.504Gateway Timeout FréquentA gateway or proxy did not get a timely response from an upstream server.505HTTP Version Not SupportedThe server does not support the major HTTP version used in the request.506Variant Also NegotiatesA server configuration error: the chosen variant is itself engaged in content negotiation.507Insufficient StorageThe server cannot store the representation needed to complete the request.508Loop DetectedThe server detected an infinite loop while processing the request.510Not ExtendedFurther extensions to the request are required for the server to fulfill it.511Network Authentication RequiredThe client needs to authenticate to gain network access (e.g. a captive portal).