40 lines
1.5 KiB
Haskell
40 lines
1.5 KiB
Haskell
module Examples.CustomStack.Main where
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import Prelude
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import Control.Monad.Reader (class MonadAsk, ReaderT, asks, runReaderT)
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import Effect.Aff (Aff)
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import Effect.Aff.Class (class MonadAff)
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import Effect.Console as Console
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import HTTPure as HTTPure
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-- | A type to hold the environment for our ReaderT
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type Env =
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{ name :: String
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}
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-- | A middleware that introduces a ReaderT
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readerMiddleware :: (HTTPure.Request -> ReaderT Env Aff HTTPure.Response) ->
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HTTPure.Request ->
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HTTPure.ResponseM
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readerMiddleware router request = do
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runReaderT (router request) { name: "joe" }
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-- | Say 'hello, joe' when run
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sayHello :: forall m. MonadAff m => MonadAsk Env m => HTTPure.Request -> m HTTPure.Response
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sayHello _ = do
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name <- asks _.name
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HTTPure.ok $ "hello, " <> name
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-- | Boot up the server
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main :: HTTPure.ServerM
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main = HTTPure.serve 8080 (readerMiddleware sayHello) do
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Console.log $ " ┌───────────────────────────────────────┐"
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Console.log $ " │ Server now up on port 8080 │"
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Console.log $ " │ │"
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Console.log $ " │ To test, run: │"
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Console.log $ " │ > curl -v localhost:8080 │"
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Console.log $ " │ # => hello, joe │"
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Console.log $ " └───────────────────────────────────────┘"
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