in Boot.scala

import omniauth.lib._
...
//Add Omniauth to the sitemap
Omniauth.sitemap
//init
//Supply a list of providers
Omniauth.initWithProviders(List(new FacebookProvider("key", "secret")))
//or init with providers in properties
Omniauth.init

define your client id (key) and secret for each provider you will use in your props file(s) or as JVM system properties

omniauth.facebooksecret=...
omniauth.facebookkey=...

set the base URL for your application

omniauth.baseurl=http://localhost:8080/

set the success and failure URLs

omniauth.successurl=/
omniauth.failureurl=/error

For Facebook provider you can set permissions. For example:

omniauth.facebookpermissions=email,read_stream

Redirect the user to the auth URL in your application:

S.redirectTo("/auth/facebook/signin")

You can optionally specify where the user should return to after successful authentication:

S.redirectTo("/auth/facebook/signin?returnTo=%2Ftimeline%3FshowComments%3Dtrue")

After a user has logged into an auth provider you can access data through the session var Omniauth.currentAuth

Omniauth.currentAuth match {
  case Full(auth:AuthInfo) => 
  case _ =>
}

You can also use obtain a user's unique ID from a provider without using sessions using Omniauth.tokenToId(provider:String, token:String): Box[String]

Omniauth.tokenToId("facebook", token) match {
  case Full(uid) => user.doSomethingWithFacebookId(uid)
}

Finally redirect the user back to the appropriate place in the application, using the optional returnTo variable:

val url = Omniauth.returnTo.openOr("/")
S.redirectTo(url)

A big thank you to jonoabroad for hosting builds to make using much easier.

To include this module in your Lift project, update your libraryDependencies in build.sbt to include:

libraryDependencies ++= {
  val liftEdition = "2.5" // Also supported: "2.6" and "3.0"

  Seq(
    // Other dependencies ...
    "net.liftmodules" %% ("omniauth_"+liftEdition) % "0.17" % "compile"
  )
}

Lift-OmniAuth is built and released to support Lift edition 2.5 with Scala versions 2.9.1, 2.9.1-1, 2.9.2, and 2.10; Lift edition 2.6 with Scala versions 2.9.1, 2.9.1-1, 2.9.2, 2.10, 2.11; and Lift edition 3.0 with Scala version 2.11. This project's scala version is purposefully set at the lowest common denominator to ensure each version compiles.

Lift-OmniAuth currently supports the following external providers:

• via OAuth
  • Facebook
  • Twitter
  • Github
  • MSLive
  • Dropbox
  • Linkedin
  • Google+
  • Instagram
  • VK
  • Kuaipan(金山快盘/迅雷快盘)

Joe Barnes has written Dropbox tutorial.