Introduced StaticHeaders middleware in http4s 0.18.15 so this library is now deprecated.

import org.http4s.server.headers.StaticHeaders

// New Way to define the service in 0.18.15
StaticHeaders.`no-cache`(service)

This is a middleware that adds a Cache-Control: no-cache to every response returned by the HttpService[F].

Care should be taken that all responses are correctly calculated as it will allow any unmatched responses through without modification.

To use http4s-middleware-nocache in an existing SBT project with Scala 2.11 or a later version, add the following dependency to your build.sbt:

libraryDependencies += "io.chrisdavenport" %% "http4s-middleware-nocache" % "<version>"

First some imports

import org.http4s._
import org.http4s.dsl.io._
import io.chrisdavenport.http4s.server.middleware.nocache.NoCache

val service = HttpService[IO]{
  case GET -> Root => Ok()
}

val req = Request[IO](Method.GET, Uri.uri("http://localhost:8080"))

val result = service(req)

result.unsafeRunSync