Load static files

[gvlpedro]

I am quite new in this library but I missing a css method, when I provide static resources I implemented this code:

    case Method.GET -> !! / "js"/ file =>
      val content = Source.fromFile(s"./static/js/$file").getLines.toList.mkString("\n")
      Response.text(content)
    case Method.GET -> !! / "css"/ file =>
      val content = Source.fromFile(s"./static/js/$file").getLines.toList.mkString("\n")
      Response.text(content)
    case Method.GET -> !! / "html"/ file =>
      val content = Source.fromFile(s"./static/js/$file").getLines.toList.mkString("\n")
      Response.html(content)

It works for javascript files when I reference this file from html:

<script src="js/app.js"></script>

but this way to load static files does not work for css files, maybe I am missing the proper way to do it but it would be very nice a Response method to deliver javascript files or css files like:

Response.javascript(local-path)
Response.css(local-path)

Any suggestion?

[jdegoes]

We do need a static file server.

[TomTriple]

We do need a static file server.

I have a simple static fileserver as middleware, which provides an API like that:

package example

import zio._
import zio.http._

object AppMain extends ZIOAppDefault {

  val staticServeMiddleware = StaticServe.middleware(
      Path.root / "images",
      StaticServe
        .fromDirectory("/opt/repos/os/aaa/images")
        .orElse(StaticServe.fromDirectory("/opt/repos/os/aaa/assets"))
        .orElse(StaticServe.fromResource)
  )

  val appDashboard = new AppDashboard()
  val appLogin = new AppLogin(appDashboard)
  val appRoutes = (
    appLogin.routes ++ appDashboard.routes
  )

  override val run =
    Server.serve(appRoutes.toHttpApp @@ staticServeMiddleware).provide(Server.default)

} 

I also added checks to anticipate traversal attacks (same as in akka http):

• prevent fishy requests with ".." in path segments
• prevent serving files outside of the configured document root directory

If we want that, here is a PR: #2450