https://github.com/alexmingoia/twain

Tiny web application framework for WAI.
https://github.com/alexmingoia/twain

framework haskell web web-framework webapp-framework

Last synced: 12 months ago
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Tiny web application framework for WAI.

• Host: GitHub
• URL: https://github.com/alexmingoia/twain
• Owner: alexmingoia
• License: bsd-3-clause
• Created: 2021-05-11T08:04:01.000Z (almost 5 years ago)
• Default Branch: main
• Last Pushed: 2024-11-05T23:21:18.000Z (over 1 year ago)
• Last Synced: 2025-03-29T05:05:18.259Z (12 months ago)
• Topics: framework, haskell, web, web-framework, webapp-framework
• Language: Haskell
• Homepage:
• Size: 40 KB
• Stars: 70
• Watchers: 6
• Forks: 3
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • Changelog: changelog.md
  • License: LICENSE

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README

          
# 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..."

```