HTTP Status Messages
 Extracts from RFC 2068, "Hypertext Transfer Protocol -- HTTP/1.1", R. Fielding,, 1997

The Status-Code element is a 3-digit integer result code of the attempt to understand and satisfy the request. The Status-Code is intended for use by automata.

The first digit of the Status-Code defines the class of response. The last two digits do not have any categorization role. There are 5 values for the first digit:

1xx  -  Information Provisional information on the progress of the request
2xx  -  Success The action was successfully received, understood, and accepted
3xx  -  Redirection Further action must be taken in order to complete the request
4xx  -  Client Error The request contains bad syntax or cannot be fulfilled
5xx  -  Server Error     The server failed to fulfill an apparently valid request