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18 lines
532 B
Haskell
18 lines
532 B
Haskell
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module Data.Parser.Expires
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( parseExpirationTime,
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)
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where
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import Control.Monad.Except
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import Data.Text.Conversions
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import Data.Time.Clock
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import Data.Time.Format (defaultTimeLocale, parseTimeM)
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import Hasura.Prelude
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-- | Extracts an absolute expiration time from a Expires header.
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parseExpirationTime :: MonadError String m => Text -> m UTCTime
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parseExpirationTime =
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fromText
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>>> parseTimeM True defaultTimeLocale "%a, %d %b %Y %T GMT"
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>>> (`onNothing` throwError "Value of Expires header is not a valid timestamp")
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