miku: A minimum web dev DSL

[ bsd3, library, web ] [ Propose Tags ]

A simple library for fast web prototyping in Haskell.

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Versions [RSS] [faq] 2011.6.11, 2011.6.12, 2011.6.15, 2011.6.18, 2011.6.19, 2011.6.20, 2011.6.24, 2012.1.19, 2012.10.27, 2014.4.14, 2014.5.19, 2014.11.17, 2016.3.16, 2016.3.16.1, 2016.3.17
Change log changelog.md
Dependencies base (>4 && <=6), blaze-builder (>=, bytestring, case-insensitive (>=, containers, filepath (>=, http-types (>=0.9), mtl, wai, wai-extra [details]
License BSD-3-Clause
Author Jinjing Wang
Maintainer Jinjing Wang <nfjinjing@gmail.com>
Category Web
Home page https://github.com/nfjinjing/miku
Source repo head: git clone git://github.com/nfjinjing/miku.git
Uploaded by JinjingWang at 2016-03-16T23:22:56Z
Distributions NixOS:2016.3.17
Downloads 8718 total (29 in the last 30 days)
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Status Hackage Matrix CI
Docs available [build log]
Last success reported on 2016-03-16 [all 1 reports]




Maintainer's Corner

For package maintainers and hackage trustees


Readme for miku-2016.3.17

[back to package description]


A tiny web dev DSL


{-# LANGUAGE OverloadedStrings #-}

import           Network.Miku
import           Network.Wai.Handler.Warp (run)

main :: IO ()
main = run 3000 . miku $ get "/" (text "miku power")


cabal update
cabal install miku
cabal install warp 

-- copy and paste the above example to myapp.hs

runghc myapp.hs

check: http://localhost:3000

Quick reference




{-# LANGUAGE OverloadedStrings #-}

import Network.Miku
import Network.Miku.Utils ((-))
import Network.Wai.Handler.Warp (run)
import Prelude hiding ((-))

main = run 3000 . miku - do

  get "/" - do
    -- something for a get request

  post "/" - do
    -- for a post request

  put "/" - do
    -- put ..

  delete "/" - do
    -- ..


get "/say/:user/:message" - do
  text . show =<< captures

-- /say/miku/hello will output
-- [("user","miku"),("message","hello")]

WAI integration

Use WAI middleware

import Network.Wai.Middleware.RequestLogger

middleware logStdout

Convert miku into a WAI application

-- in Network.Miku.Engine

miku :: MikuMonad -> Application


  • It's recommended to use your own html combinator / template engine. Try DIY with, e.g. moe.
  • Example view using custom html combinator (moe in this case)
  • When inspecting the request, use ask defined in ReaderT monad to get the Request, then use helper methods for wai to query it.
  • Response is in StateT, html and text are simply helper methods that update the state, i.e. setting the response body, content-type, etc.
  • You do need to understand monad transformers to reach the full power of miku.