Unfiltered authentication example

auth.scala

package auth

import unfiltered.Cycle
import unfiltered.request.{HttpRequest, BasicAuth, Path}
import unfiltered.response._
import unfiltered.jetty.Http
import unfiltered.filter.Plan

object Req {
  def apply[Req, Res](f:PartialFunction[HttpRequest[Req], HttpRequest[Req] => ResponseFunction[Res]]):Cycle.Intent[Req, Res] = {
    case req if f.isDefinedAt(req) => f(req)(req)
  }
}

object User {
  def apply[Req, Res](f:User => ResponseFunction[Res]):HttpRequest[Req] => ResponseFunction[Res] = {
    case BasicAuth(name, _) => f(new User(name))
    case _                  => Unauthorized ~> WWWAuthenticate("""Basic realm="/"""")
  }
}

class User(val name:String)

object Demo extends App with Plan {

  def intent = auth orElse noAuth

  def auth:Plan.Intent = Req{
    case Path("/auth") => User{ user =>
      Ok ~> ResponseString(user.name)
    }
  }

  def noAuth:Plan.Intent = {
    case Path("/noauth") =>
      Ok ~> ResponseString("no user")
  }

  Http.local(8080).filter(this).run()
}

usage.txt

λ curl -v http://localhost:8080/noauth
* About to connect() to localhost port 8080 (#0)
*   Trying 127.0.0.1... connected
* Connected to localhost (127.0.0.1) port 8080 (#0)
> GET /noauth HTTP/1.1
> User-Agent: curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8r zlib/1.2.3
> Host: localhost:8080
> Accept: */*
> 
< HTTP/1.1 200 OK
< Content-Length: 7
< Server: Jetty(7.6.0.v20120127)
< 
* Connection #0 to host localhost left intact
* Closing connection #0
no user~
λ curl -v http://localhost:8080/auth
* About to connect() to localhost port 8080 (#0)
*   Trying 127.0.0.1... connected
* Connected to localhost (127.0.0.1) port 8080 (#0)
> GET /auth HTTP/1.1
> User-Agent: curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8r zlib/1.2.3
> Host: localhost:8080
> Accept: */*
> 
< HTTP/1.1 401 Unauthorized
< WWW-Authenticate: Basic realm="/"
< Content-Length: 0
< Server: Jetty(7.6.0.v20120127)
< 
* Connection #0 to host localhost left intact
* Closing connection #0
~
λ curl -v -u foo:bar http://localhost:8080/auth
* About to connect() to localhost port 8080 (#0)
*   Trying 127.0.0.1... connected
* Connected to localhost (127.0.0.1) port 8080 (#0)
* Server auth using Basic with user 'foo'
> GET /auth HTTP/1.1
> Authorization: Basic Zm9vOmJhcg==
> User-Agent: curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8r zlib/1.2.3
> Host: localhost:8080
> Accept: */*
> 
< HTTP/1.1 200 OK
< Content-Length: 3
< Server: Jetty(7.6.0.v20120127)
< 
* Connection #0 to host localhost left intact
* Closing connection #0
foo~
λ