Scotty Web Framework

Scotty is a lightweight, Sinatra-inspired Haskell web framework built on WAI and Warp. You can define a web application by specifying HTTP verbs (like get), URL patterns, and returning text content. It is template-agnostic; any value that can be converted to Text can be used to render a page.

To run a basic Scotty application, use runghc on a source file or use stack exec if you have the package installed via Stack.

{-# LANGUAGE OverloadedStrings #-}
import Web.Scotty

main = scotty 3000 $
    get "/:word" $ do
        beam <- pathParam "word"
        html $ mconcat ["<h1>Scotty, ", beam, " me up!</h1>"]

If you encounter compilation failures for regex-posix on Windows, apply the following configuration based on your build tool:

For Stack users: Add these parameters to your stack.yaml:

extra-deps:
- regex-posix-clib-2.7
flags:
  regex-posix:
    _regex-posix-clib: true

For Cabal users: Update the constraints section of your cabal.project.local:

constraints: regex-posix +_regex-posix-clib

You can run the provided basic example to see Scotty in action using runghc or stack.

Using runghc:

runghc examples/basic.hs

Using stack:

stack exec -- scotty-basic

Once the server is running (defaulting to port 3000), you can test it with curl:

curl localhost:3000