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Core http4s library for servers and clients

There is a newer version: 0.16.6a

package org.http4s

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

object Service {
  /**
    * Lifts a total function that returns a Task into a [[Service]].
    *
    * @see [[HttpService.apply]]
    */
  def lift[A, B](f: A => Task[B]): Service[A, B] = Kleisli.kleisli(f)

  /**
    * Lifts a Task into a [[Service]].
    *
    */
  def const[A, B](b: => Task[B]): Service[A, B] = b.liftKleisli

  /**
    *  Lifts a value into a [[Service]].
    *
    */
  def constVal[A, B](b: => B): Service[A, B] = Task.now(b).liftKleisli

  /**
    * Allows Service chainig through an implicit [[Fallthrough]] instance.
    *
    */
  def withFallback[A, B : Fallthrough](fallback: Service[A, B])(service: Service[A, B]): Service[A, B] =
    service.flatMap(resp => Fallthrough[B].fallthrough(resp, fallback))
}