200	Request completed
201	Object created, reason = new URI
202	Async completion (TBS)
203	Partial completion
204	No info to return
300	Server couldn't decide what to return
301	Object permanently moved
302	Object temporarily moved
303	Redirection w/ new access method
304	If-modified-since was not modified
400	Invalid syntax
401	Access denied
402	Payment required
403	Request forbidden
404	Object not found
405	Method is not allowed
406	No response acceptable to client found
407	Proxy authentication required
408	Server timed out waiting for request
409	User should resubmit with more info
410	The resource is no longer available
411	Couldn't authorize client
500	Internal server error
501	Required not supported
502	Error response received from gateway
503	Temporarily overloaded
504	Timed out waiting for gateway
