[html][HTTP Codes] HTTP Codes - Meaning of status codes

	Request in progress
100	Continue. Request initiated and not rejected. The client can continue.
101	Switching Protocols. The server reports having received a request to change protocol and it is accepted.
102	In processing. Makes clear that the server is active and not inaccessible.(WebDav Extension).
	Request processed
200	Request completed successfully.The page is found and displayed.
201	Created.Establishing a link between the client and the server in the form of URI on a newly created resource.
202	Accepted.The request is received and accepted but not yet processed..
203	Non-Authoritative information.The server response provides information that does not certify it. It could come from a third-party source.
204	No content.No information to return from the server.
205	Reset content. Request processed, the client must reset the source of the request.In the case of a form, it must be cleared before another request.
206	Partial content.Only part of the content is returned.(This may be due to limitation of resources). A Range header must have been included by the user.
207	Multiple statements for the answer.(WebDav Extension).
210	Different contents between the server and the client.(WebDav Extension).
	Redirections
300	Multiple choice.The server has different answers, so it must return a list of resources with their location.
301	Moved permanently.To be used when a file is renamed or moved, and a new URL must be provided.The old URL will be ignored by robots.
302	Moved temporarily. A new URL is provided but robots return to the original URL.
303	See other location.This code is returned when the resource can be retrieved atto another address and a GET method must be used to obtain it. The client is redirected if the method is GET.
304	Unmodified.The page has not changed since the last request, and no content is returned.This assumes that the server is configured to provide a If-modified-since header. Essential for robots of search engines.
305	Use a proxy.Response from the server asking to recover the document on a proxy server whose address is provided.
307	Temporary redirect.The request is redirected to another address as 302.
	Client error or access denied
400	Bad request.The server does not recognize the command syntax.
401	Unauthorized.Authentication required. Connections refused unless a valid password is furnished.
402	Payment required. Future use.
403	Forbidden.Access is prohibited or it is prohibited to a specified robot (for the server and not by robots.txt).
404	Not found.The page does not exist.This may be due to an incorrect spelling, different cases on Unix, or a change of address.
405	Method of request not allowed.
406	Not acceptable.The server can not provide the type of document requested.
407	Proxy authentication required.The connection is refused because the client needs to connect only through a proxy server that is indicated in the response.
408	Timeout. Expiration of time allocated to a request.
409	Conflict.The request contains a request that conflicts with the state of the resource. The information on the causes are provided with the error code. Occurs with the PUT method.
410	Gone.As 404 but means that the page not found was there before. Google recommends its use rather than 404 when the page is missing forever.
411	Length required.The server does not accept the request if the Content-Length is not specified.
412	Precondition not met.The request is accompanied by conditions that the server can not fulfill.
413	Volume asked too high.The server can not provide a document of this size.
414	Request-URI too long.The size of the URI sent to the server exceeds the number of characters allowed. Occurs whan a POST is converted to GET.
415	Unsupported media type.The client requests a document type that the server does not support.
416	Requested range not satisfiable. The request specifies the Range (ex 200-10000) and the size of the resource is not included in this range.
417	Expectation failed .The request contains a field Expect and the server can not meet it.The definition of this field is vague.
422	The request contains an entity that the server can not handle.(WebDav Extension).
423	Locked.The page is locked and will not be transmitted.(WebDav Extension).
424	Failure of the method used by the request.(WebDav Extension).
	Server errors
500	Internal Server Error.The request is not processed.
501	Not implemented.The server does not recognize the nature of the request, the method used, for example.
502	Bad gateway.When the server acts as a proxy or intermediary and that the other server not responding.
503	Service unavailable.Temporary problem due to overloading or other server problem including maintenance.
504	Gateway timeout. Waiting time from the other server exceeded, when the server asked plays the role of gateway.
505	HTTP Version not supported.The protocol used is too recent or not handled.
507	Space on the server insufficient to accomplish the client's request.(WebDav Extension).
509	Non-standard code but may be used by servers when exceeding quota.