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RequestAuthorizer.scala
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RequestAuthorizer.scala
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/*
* Copyright 2018 Permutive
*
* 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 com.permutive.pubsub.http.oauth
import cats.syntax.all._
import cats.{Applicative, Functor}
import org.http4s.{AuthScheme, Credentials, Request}
import org.http4s.headers.Authorization
// This could be implemented as client middleware but we think that could be a footgun; a client using auth middleware
// could easily be used in the wrong place by accident.
trait RequestAuthorizer[F[_]] {
def authorize(request: Request[F]): F[Request[F]]
}
object RequestAuthorizer {
def tokenProvider[F[_]: Functor](tokenProvider: TokenProvider[F]): RequestAuthorizer[F] =
new RequestAuthorizer[F] {
override def authorize(request: Request[F]): F[Request[F]] =
tokenProvider.accessToken.map(token =>
request.putHeaders(Authorization(Credentials.Token(AuthScheme.Bearer, token.accessToken)))
)
}
def noop[F[_]: Applicative]: RequestAuthorizer[F] = new RequestAuthorizer[F] {
override def authorize(request: Request[F]): F[Request[F]] = Applicative[F].pure(request)
}
}