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AutoSlash.scala
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AutoSlash.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.Monad
import cats.MonoidK
import cats.data.Kleisli
import cats.syntax.all._
/** Removes a trailing slash from [[Request]] path
*
* If a route exists with a file style [[Uri]], eg "/foo",
* this middleware will cause [[Request]]s with uri = "/foo" and
* uri = "/foo/" to match the route.
*/
object AutoSlash {
def apply[F[_], G[_], B](
http: Kleisli[F, Request[G], B]
)(implicit F: MonoidK[F]): Kleisli[F, Request[G], B] =
Kleisli { req =>
http(req) <+> {
val pathInfo = req.pathInfo
if (pathInfo.isEmpty)
F.empty
else
http.apply(req.withPathInfo(pathInfo.dropEndsWithSlash))
}
}
def httpRoutes[F[_]: Monad](httpRoutes: HttpRoutes[F]): HttpRoutes[F] =
apply(httpRoutes)
}