52 lines
1.8 KiB
Haskell
52 lines
1.8 KiB
Haskell
module Examples.Chunked.Main where
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import Prelude
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import Data.Generic.Rep (class Generic)
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import Data.Maybe (Maybe(..))
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import Effect.Aff (Aff)
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import Effect.Class (liftEffect)
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import Effect.Console (log)
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import HTTPurple (Request, ResponseM, ServerM, ok, serve)
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import Node.ChildProcess (defaultSpawnOptions, spawn, stdout)
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import Node.Stream (Readable)
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import Routing.Duplex as RD
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import Routing.Duplex.Generic as RG
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data Route = SayHello
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derive instance Generic Route _
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route :: RD.RouteDuplex' Route
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route = RD.root $ RG.sum
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{ "SayHello": RG.noArgs
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}
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-- | Run a script and return it's stdout stream
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runScript :: String -> Aff (Readable ())
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runScript script =
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liftEffect $ stdout <$> spawn "sh" [ "-c", script ] defaultSpawnOptions
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-- | Say 'hello world!' in chunks when run
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router :: Request Route -> ResponseM
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router = const $ runScript "echo 'hello '; sleep 1; echo 'world!'" >>= ok
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-- | Boot up the server
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main :: ServerM
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main =
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serve { hostname: "localhost", port: 8080, onStarted } { route, router }
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where
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onStarted = do
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log " ┌──────────────────────────────────────┐"
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log " │ Server now up on port 8080 │"
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log " │ │"
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log " │ To test, run: │"
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log " │ > curl -Nv localhost:8080 │"
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log " │ # => ... │"
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log " │ # => < Transfer-Encoding: chunked │"
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log " │ # => ... │"
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log " │ # => hello │"
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log " │ (1 second pause) │"
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log " │ # => world! │"
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log " └──────────────────────────────────────┘"
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