Aborting the computation of
IO monads or arrows.
abort status headers msg
Network.HTTP.Lucu.Resource.Resource monad with given status,
additional response headers, and optional message string.
What this really does is to throw a special
Exception. The exception will be caught by the
- If the
Network.HTTP.Lucu.Resource.Resourceis in the /Deciding Header/ or any precedent states, it is possible to use the
statusand such like as a HTTP response to be sent to the client.
- Otherwise the HTTP response can't be modified anymore so the
only possible thing the system can do is to dump it to the
Note that the status code doesn't have to be an error code so you can use this action for redirection as well as error reporting e.g.
abort MovedPermanently [("Location", "http://example.net/")] (Just "It has been moved to example.net")