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Look inside cookies instead of just the header

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This commit is contained in:
Joe Shanahan 2017-07-17 09:18:34 +01:00
parent 265b4276db
commit 400bd564dc
1 changed files with 9 additions and 7 deletions
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16
doc/tutorial/Authentication.lhs
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@ -284,14 +284,16 @@ create a value of type `AuthHandler Request Account` using the above `lookupAcco
method:
```haskell
-- | The auth handler wraps a function from Request -> Handler Account
-- we look for a Cookie and pass the value of the cookie to `lookupAccount`.
import Web.Cookie (parseCookies)
authHandler :: AuthHandler Request Account
authHandler =
let handler req = case lookup "servant-auth-cookie" (requestHeaders req) of
Nothing -> throwError (err401 { errBody = "Missing auth header" })
Just authCookieKey -> lookupAccount authCookieKey
in mkAuthHandler handler
authHandler = mkAuthHandler handler
where
maybeToEither e = maybe (Left e) Right
throw401 msg = throwError $ err401 { errBody = msg }
handler req = either throw401 lookupAccount $ do
cookie <- maybeToEither "Missing cookie header" $ lookup "cookie" $ requestHeaders req
maybeToEither "Missing token in cookie" $ lookup "servant-auth-cookie" $ parseCookies cookie
```
Let's now protect our API with our new, bespoke authentication scheme. We'll