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Resolve an HTTP error
100: OK to continue
101: server has switched protocols
200: request succeeded
201: document created (reason: new URI)
202: request completed asynchronously (TBS)
203: request completed incompletely
204: no information to return
205: request succeeded, but empty form
206: incomplete GET request
300: server cannot determine return code
301: document permanently moved
302: document temporarily moved
303: redirection with new access method
304: 'if-modified-since' field not modified
305: redirection to proxy specified by header
307: HTTP/1.1
400: syntax error in document address
401: no access authorization for document
402: document access subject to payment
403: no access authorization to server
404: requested page does not exist
405: form request method not allowed
406: request not accepted by 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: server refused request as it lacks length
412: precondition given in request failed
413: request entity too large
414: request URI too long
415: unsupported media type
500: server internal error
501: request made to server not implemented
502: bad gateway access
503: service unavailable
504: gateway access time expired
505: HTTP version not supported