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What are status codes and what do they mean?

Monday, March 27, 2006

Put simplistically, an HTML status code is a three digit code sent to your browser from the server of the page you are trying to view. You will probably have seen "404 page not found" which is the most common example of a status code. The first digit of the code determines the group to which it belongs:

1xx - informational codes
2xx - success codes
3xx - redirection codes
4xx - client error codes e.g. errors originating from the user
5xx - server error codes

The most common ones you are likely to see are:

200 - ok
301 - moved permanently
302 - moved temporarily
400 - bad request e.g. the server did not understand what you asked for!
401 - unauthorised
403 - forbidden
404 - not found
500 - internal server error
503 - service unavailable - can be due to server overload

For a complete list of all error codes, see http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html

Labels: internet

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