Common HTTP status Codes

Common HTTP return Status codes for enterprise production environments are summarized in the following table:

HTTP status Code	English explanation	Chinese explanation
200	-ok,-standard response for successful HTTP requests.	The server successfully returned the correct Web page after making an HTTP request
301	-moved permanently,-this and all of the future requests should is directed to the given.	The requested page has been permanently redirected to a new location. (Permanent jump),
302	- Temporary Moved	Request has been temporarily redirected to a new location
403	-forbidden,forbidden request (matches a deny filter) = HTTP 403 -the request was a legal request and the server is refusing to respond to it.	(No access), the server rejects the request
404	-not Found-the requested resource could not being Found but may is available again in the future.	The server could not find the requested page.
500	-Internal Server error-internal Error in haproxy = HTTP 500 -A generic error message, given when no more specific message is suitable.	(Internal server error) front end load Balancer error
502	-Bad gateway-the server returned an invalid or incomplete response = HTTP 502 -The server was acting as a gateway or proxy and received a invalid response from the upstream server.	(Bad Gateway), typically when the gateway server requests the backend service, the backend service does not return the results correctly as the HTTP protocol.
503	-Service unavailable-no server is available to handle the request + = HTTP 503 -The server is currently unavailable (because it was overloaded or down for maintenance).	(Service is not currently available), possibly due to overloading or downtime maintenance.
504	-Gateway timeout-the Server failed to reply in time + = HTTP 504 -The server was acting as a gateway or proxy and do not receive a timely response from the upstream server.	(Gateway Timeout), typically when a gateway server requests a backend service, the backend service does not complete the service at a specific time.

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Common HTTP status Codes