src/lib/haskell/Utils/HTTP.hs


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module Utils.HTTP
  ( get
  ) where

import           Control.Exception    (SomeException, try)
import           Data.ByteString      (ByteString)
import qualified Data.ByteString.Lazy as BS
import           Data.Text            (Text)
import qualified Data.Text            as T
import           Network.HTTP.Conduit

import           Model.URL

get :: (ByteString -> Text) -> URL -> IO (Either Text Text)
get decode url = mapLeft (T.pack . show) <$> (try (unsafeGetPage decode url) :: IO (Either SomeException Text))

unsafeGetPage :: (ByteString -> Text) -> URL -> IO Text
unsafeGetPage decode url = (decode . BS.toStrict) <$> simpleHttp (T.unpack url)

mapLeft :: (a -> c) -> Either a b -> Either c b
mapLeft f (Left l)  = Left (f l)
mapLeft _ (Right r) = (Right r)