HAppS

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HAppS
Design by Alex Jacobson
Latest release 0.8.8 / 6 March 2007
Preview release Darcs / 21 June 2007
OS Portable (requires GHC and libraries)
Platform Portable
Available in Haskell
Development status Beta
Genre Application server
License BSD-3
Website http://happs.org/

HAppS (Haskell Application Server) is a Free application server for websites written in the functional programming language Haskell. It integrates handling Web, persistence, email (sending and receiving), DNS, XML/XSLT, Amazon S3 backend, and database server functionality.[1]

It makes use of a number of Haskell libraries and systems such as Parsec, Cabal, Template Haskell, and monad transformers ("Your app then is just a set of state transformer functions (in the MACID Monad) that take an event and state as input and that evaluate to a new state, a response, and a (possibly null) set of sideeffects."[1]) among others.

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