100 --- Client must continue sending requests
200---The server returns the page successfully
300---The requested resource is available in multiple places
305---The requested resource must be obtained at the address specified by the server
307---Declare the temporary deletion of the requested resource
400---Bad Request
404---The requested page does not exist
500---The server has an internal error
502---The server is temporarily unavailable
503---The server is overloaded or suspended for maintenance
505---The server does not support or rejects the HTTP version specified in the request header