Common response status codes

http Protocol status code classification

1xx：100-101 message
2xx：200-206 success
3xx：300-307 Redirect
4xx：400-415 Error information , Client error
5xx：500-505 Error information , Server-side error

http Protocol commonly used status code

200： success , Request data through the response message of entity-body Partial sending ;OK
301： Requested URL The resource pointed to has been deleted ; But in the response message, through the header Location Indicates the resource present                 In its new location ;Moved Permanently
302： response message Location Indicate the temporary new location of the resource Moved Temporarily
304： The client made a conditional request , But the resources on the server have not changed , By responding to this response state               Code notification client ;Not Modified
307:    Browser internal redirection
401： You need to enter an account number and password for authentication to access resources ;Unauthorized
403： Request denied ;Forbidden
404： The server could not find the resource requested by the client ;Not Found
500： Server internal error ;Internal Server Error
502： The proxy server received a pseudo response from the back end server , If unable to connect to the gateway ;Bad Gateway
503： Service not available , Temporary server maintenance or overload , The server was unable to process the request
504： gateway timeout