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package.scala
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package.scala
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/*
* Copyright 2014 http4s.org
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.http4s
package server
package middleware
import cats.data.Kleisli
import cats.data.OptionT
import cats.effect.Sync
import org.http4s.headers._
package object authentication {
// TODO Could be reduced to a Monad[F]
def challenged[F[_], A](
challenge: Kleisli[F, Request[F], Either[Challenge, AuthedRequest[F, A]]]
)(routes: AuthedRoutes[A, F])(implicit F: Sync[F]): HttpRoutes[F] =
Kleisli { req =>
OptionT[F, Response[F]] {
F.flatMap(challenge(req)) {
case Left(challenge) => F.pure(Some(unauthorized(challenge)))
case Right(authedRequest) => routes(authedRequest).value
}
}
}
private[this] def unauthorized[F[_]](challenge: Challenge): Response[F] =
Response(Status.Unauthorized).putHeaders(`WWW-Authenticate`(challenge))
}