HTTP Response Codes Defined

HTTP Response Codes Defined
General
1xx	HTTP_INFORMATIONAL
	Request was received; processing can continue.
2xx	HTTP_SUCCESSFUL
	The request was successfully received, understood, and accepted.
3xx	HTTP_REDIRECTION
	Further action must be taken in order to complete the request.
4xx	HTTP_CLIENT_ERROR
	The request contained bad syntax or cannot be fulfilled.
5xx	HTTP_SERVER_ERROR
	The server failed to fulfill an apparently valid request.
Detail
100	HTTP_CONTINUE
	Request was received and processing can continue.
101	HTTP_SWITCHING_PROTOCOLS
	Request to switch protocols accepted.
200	HTTP_OK
	Request completed successfully.
201	HTTP_CREATED
	Request fulfilled and resulted in new resource being created.
202	HTTP_ACCEPTED
	Request accepted, but processing has not completed.
203	HTTP_NON_AUTHORITATIVE_INFORMATION
	Information in Header is not from original server.
204	HTTP_NO_CONTENT
	Request received; no information exists.
205	HTTP_RESET_CONTENT
	Request fulfilled; reset document view.
206	HTTP_PARTIAL_CONTENT
	The server has fulfilled the partial GET request for the resource.
300	HTTP_MULTIPLE_CHOICES
	Requested address refers to more than one entity.
301	HTTP_MOVED_PERMANENTLY
	Page has been moved permanently; new URL available.
302	HTTP_FOUND
	Page has been moved temporarily; new URL available.
303	HTTP_SEE_OTHER
	Requested data is somewhere else; GET method should be used to retrieve it.
304	HTTP_NOT_MODIFIED
	Requested resource has not been modified.
305	HTTP_USE_PROXY
	Requested resource must be accessed through proxy given by Location field.
307	HTTP_TEMPORARY_REDIRECT
	Requested data temporarily resides at a new location.
400	HTTP_BAD_REQUEST
	Request could not be processed due to syntax error.
401	HTTP_UNAUTHORIZED
	Client request did not include proper authentication data.
402	HTTP_PAYMENT_REQUIRED
	Payment is required. (Not implemented at this time. Reserved for future use.)
403	HTTP_FORBIDDEN
	Request was understood, however access is forbidden.
404	HTTP_NOT_FOUND
	Requested document could not be found.
405	HTTP_METHOD_NOT_ALLOWED
	The method being used to access the file is not allowed.
406	HTTP_NOT_ACCEPTABLE
	Request document does not exist in a format the client can accept.
407	HTTP_PROXY_AUTHENTICATION_REQUIRED
	Client must first authenticate with proxy for access.
408	HTTP_REQUEST_TIMEOUT
	The client did not produce a request within the time that the server was prepared to wait.
409	HTTP_CONFLICT
	Request could not be completed due to a conflict with the resource.
410	HTTP_GONE
	Requested resource no longer exists and no forwarding address is known.
411	HTTP_LENGTH_REQUIRED
	Request is missing required Content-Length header.
412	HTTP_PRECONDITION_FAILED
	Request failed due to precondition not being met.
413	HTTP_REQUEST_ENTITY_TOO_LARGE
	Request was too big to process.
414	HTTP_REQUEST_URI_TOO_LARGE
	Request refused due to URL being longer than server is willing to process.
415	HTTP_UNSUPPORTED_MEDIA_TYPE
	Requested resource format is not supported.
416	HTTP_REQUESTED_RANGE_NOT_SATISFIABLE
	Request includes a Range header and none of the ranges specified are contained within the requested resource.
417	HTTP_EXPECTATION_FAILED
	The server is unable to meet the demands of the Expect header given by the client.
500	HTTP_INTERNAL_SERVER_ERROR
	The server encountered an unexpected condition which prevented it from fulfilling the request.
501	HTTP_NOT_IMPLEMENTED
	The server does not support the functionality required to fulfill the request.
502	HTTP_BAD_GATEWAY
	The server, while acting as a gateway or proxy, received an invalid response from an upstream provider.
503	HTTP_SERVICE_UNAVAILABLE
	The server is currently unable to handle the request due to a temporary overloading or maintenance of the server.
504	HTTP_GATEWAY_TIMEOUT
	The server, while acting as a gateway or proxy, did not receive a timely response from an upstream provider.
505	HTTP_VERSION_NOT_SUPPORTED
	The server does not support, or refuses to support, the HTTP protocol version that was used in the request.