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100 : OK to continue
101 : the server has changed protocols
200: query completed successfully
201: document created (reason: new URI)
202: request completed asynchronously (TBS)
203: query incompletely completed
204 : no information to send
205: query completed but form empty
206: GET request incomplete
300 : the server cannot determine the return code
301: document moved permanently
302: document moved temporarily
303: redirection with new access method
304: ‘if-modified-since’ field was not modified
305: redirection to a proxy specified by the header
307 : HTTP/1.1
400: syntax error in document address
401: no authorization to access the document
402: access to document subject to payment
403: no server access authorization
404: the requested page does not exist
405: form query method not authorized
406 : request not accepted by the server
407 : proxy authorization required
408 : access time to requested page expired
409: user must resubmit with more info
410: this resource is no longer available
411: the server has refused the request because it has no length
412: the precondition given in the query failed
413 : query entity too large
414 : the request URI was too long
415: unmanaged media type
500: internal server error
501: request to server not deleted
502: wrong access gateway
503 : service not available
504: gateway access time expired
505: HTTP version not supported