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Base library for building http4s servers

There is a newer version: 0.16.6a

package org.http4s

import scalaz.Kleisli
import scalaz.concurrent.Task
import scalaz.syntax.kleisli._

package object server {




  /**
   * A middleware is a function of one [[Service]] to another, possibly of a
   * different [[Request]] and [[Response]] type.  http4s comes with several
   * middlewares for composing common functionality into services.
   *
   * @tparam A the request type of the original service
   * @tparam B the response type of the original service
   * @tparam C the request type of the resulting service
   * @tparam D the response type of the original service
   */
  type Middleware[A, B, C, D] = Service[A, B] => Service[C, D]

  object Middleware {
    def apply[A, B, C, D](f: (C, Service[A, B]) => Task[D]): Middleware[A, B, C, D] = {
      service => Service.lift {
        req => f(req, service)
      }
    }
  }

  /**
   * An HTTP middleware converts an [[HttpService]] to another.
   */
  type HttpMiddleware = Middleware[Request, Response, Request, Response]
}