Status Codes

Normal

Returned Value	Description
200 OK	The request has been successfully processed.
201 Created	The request has been successfully processed and a resource has been created.
202 Accepted	The request has been accepted but may not be processed immediately.
204 No Content	The request has been successfully processed, but there is no need to send any data back.

Abnormal

Returned Value	Description
400 Bad Request	The request failed to be processed due to bad syntax.
401 Unauthorized	A username and a password are required to access a page.
403 Forbidden	The requested page cannot be accessed.
404 Not Found	The requested page cannot be found.
405 Method Not Allowed	A method in the request is not allowed.
406 Not Acceptable	The response cannot be accepted by the client.
407 Proxy Authentication Required	The client must be authorised by the proxy before the request can proceed.
408 Request Timeout	The request timed out.
409 Conflict	Failed to complete the request due to a conflict.
500 Internal Server Error	Failed to complete the request due to a system error.
501 Not Implemented	Failed to complete the request because the server does not support all that is needed for the request to be completed.
502 Bad Gateway	Failed to complete the request because the server has received an invalid response from an upstream server.
503 Service Unavailable	Failed to complete the request because the server is unavailable.
504 Gateway Timeout	The server has waited too long for a response from an upstream server.