HTTP Status Codes

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The following table contains the constants and corresponding values for the HTTP status codes returned by servers on the Internet.

Constant	Value	Description
HTTP_STATUS_CONTINUE	100	The request can be continued.
HTTP_STATUS_SWITCH_PROTOCOLS	101	The server has switched protocols in an upgrade header.
HTTP_STATUS_OK	200	The request completed successfully.
HTTP_STATUS_CREATED	201	The request has been fulfilled and resulted in the creation of a new resource.
HTTP_STATUS_ACCEPTED	202	The request has been accepted for processing, but the processing has not been completed.
HTTP_STATUS_PARTIAL	203	The returned meta information in the entity-header is not the definitive set available from the origin server.
HTTP_STATUS_NO_CONTENT	204	The server has fulfilled the request, but there is no new information to send back.
HTTP_STATUS_RESET_CONTENT	205	The request has been completed, and the client program should reset the document view that caused the request to be sent to allow the user to easily initiate another input action.
HTTP_STATUS_PARTIAL_CONTENT	206	The server has fulfilled the partial GET request for the resource.
HTTP_STATUS_AMBIGUOUS	300	The server couldn't decide what to return.
HTTP_STATUS_MOVED	301	The requested resource has been assigned to a new permanent URI (Uniform Resource Identifier), and any future references to this resource should be done using one of the returned URIs.
HTTP_STATUS_REDIRECT	302	The requested resource resides temporarily under a different URI (Uniform Resource Identifier).
HTTP_STATUS_REDIRECT_METHOD	303	The response to the request can be found under a different URI (Uniform Resource Identifier) and should be retrieved using a GET method on that resource.
HTTP_STATUS_NOT_MODIFIED	304	The requested resource has not been modified.
HTTP_STATUS_USE_PROXY	305	The requested resource must be accessed through the proxy given by the location field.
HTTP_STATUS_REDIRECT_KEEP_VERB	307	The redirected request keeps the same verb. HTTP/1.1 behavior.
HTTP_STATUS_BAD_REQUEST	400	The request could not be processed by the server due to invalid syntax.
HTTP_STATUS_DENIED	401	The requested resource requires user authentication.
HTTP_STATUS_PAYMENT_REQ	402	Not currently implemented in the HTTP protocol.
HTTP_STATUS_FORBIDDEN	403	The server understood the request, but is refusing to fulfill it.
HTTP_STATUS_NOT_FOUND	404	The server has not found anything matching the requested URI (Uniform Resource Identifier).
HTTP_STATUS_BAD_METHOD	405	The method used is not allowed.
HTTP_STATUS_NONE_ACCEPTABLE	406	No responses acceptable to the client were found.
HTTP_STATUS_PROXY_AUTH_REQ	407	Proxy authentication required.
HTTP_STATUS_REQUEST_TIMEOUT	408	The server timed out waiting for the request.
HTTP_STATUS_CONFLICT	409	The request could not be completed due to a conflict with the current state of the resource. The user should resubmit with more information.
HTTP_STATUS_GONE	410	The requested resource is no longer available at the server, and no forwarding address is known.
HTTP_STATUS_LENGTH_REQUIRED	411	The server refuses to accept the request without a defined content length.
HTTP_STATUS_PRECOND_FAILED	412	The precondition given in one or more of the request header fields evaluated to false when it was tested on the server.
HTTP_STATUS_REQUEST_TOO_LARGE	413	The server is refusing to process a request because the request entity is larger than the server is willing or able to process.
HTTP_STATUS_URI_TOO_LONG	414	The server is refusing to service the request because the request URI (Uniform Resource Identifier) is longer than the server is willing to interpret.
HTTP_STATUS_UNSUPPORTED_MEDIA	415	The server is refusing to service the request because the entity of the request is in a format not supported by the requested resource for the requested method.
HTTP_STATUS_RETRY_WITH	449	The request should be retried after doing the appropriate action.
HTTP_STATUS_SERVER_ERROR	500	The server encountered an unexpected condition that prevented it from fulfilling the request.
HTTP_STATUS_NOT_SUPPORTED	501	The server does not support the functionality required to fulfill the request.
HTTP_STATUS_BAD_GATEWAY	502	The server, while acting as a gateway or proxy, received an invalid response from the upstream server it accessed in attempting to fulfill the request.
HTTP_STATUS_SERVICE_UNAVAIL	503	The service is temporarily overloaded.
HTTP_STATUS_GATEWAY_TIMEOUT	504	The request was timed out waiting for a gateway.
HTTP_STATUS_VERSION_NOT_SUP	505	The server does not support, or refuses to support, the HTTP protocol version that was used in the request message.

Windows CE

Windows CE	Use version 2.12 and later
Minimum availability	Internet Explorer 4.0