# Twain

[![Hackage](https://img.shields.io/hackage/v/twain.svg?style=flat)](http://hackage.haskell.org/package/twain)
![BSD3 License](http://img.shields.io/badge/license-BSD3-brightgreen.svg)

Twain is a tiny web application framework for
[WAI](http://hackage.haskell.org/package/wai).

- `ResponderM` for composing responses with do notation.
- Routing with path captures that decompose `ResponderM` into middleware.
- Parameter parsing from cookies, path, query, and body.
- Helpers for redirects, headers, status codes, and errors.

```haskell
{-# language OverloadedStrings #-}

import Network.Wai.Handler.Warp (run)
import Web.Twain

main :: IO ()
main = do
  run 8080 $
    foldr ($) (notFound missing) routes

routes :: [Middleware]
routes =
  [ get "/" index
  , post "/echo/:name" echoName
  ]

index :: ResponderM a
index = send $ html "Hello World!"

echoName :: ResponderM a
echoName = do
  name <- param "name"
  send $ html $ "Hello, " <> name

missing :: ResponderM a
missing = send $ html "Not found..."
```