36 lines
1.2 KiB
Haskell
36 lines
1.2 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
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module Web.Authenticate.BrowserId
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( browserIdJs
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, checkAssertion
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) where
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import Data.Text (Text)
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import Network.HTTP.Conduit (parseUrl, responseBody, httpLbs, withManager, method, urlEncodedBody)
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import Data.Aeson (json, Value (Object, String))
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import Data.Attoparsec.Lazy (parse, maybeResult)
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import qualified Data.HashMap.Lazy as Map
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import Data.Text.Encoding (encodeUtf8)
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-- | Location of the Javascript file hosted by browserid.org
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browserIdJs :: Text
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browserIdJs = "https://browserid.org/include.js"
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checkAssertion :: Text -- ^ audience
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-> Text -- ^ assertion
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-> IO (Maybe Text)
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checkAssertion audience assertion = do
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req' <- parseUrl "https://browserid.org/verify"
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let req = urlEncodedBody
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[ ("audience", encodeUtf8 audience)
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, ("assertion", encodeUtf8 assertion)
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] req' { method = "POST" }
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res <- withManager $ httpLbs req
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let lbs = responseBody res
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return $ maybeResult (parse json lbs) >>= getEmail
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where
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getEmail (Object o) =
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case (Map.lookup "status" o, Map.lookup "email" o) of
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(Just (String "okay"), Just (String e)) -> Just e
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_ -> Nothing
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getEmail _ = Nothing
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