Answer to http://stackoverflow.com/questions/20631996/passportjs-redirect-loop

20631996.coffee

restify = require("restify")
passport = require("passport")
GoogleStrategy = require("passport-google").Strategy

jsonContentType = (req, res, next) ->
    res.setHeader("content-type", "application/json")
    next(req, res, next)

server = restify.createServer(
    name: "Sparked API"
)

passport.use(new GoogleStrategy({
    returnURL: "http://localhost:8080/auth/google/return"
    realm: "http://localhost:8080/"
}, (id, profile, done) ->
    done()
))

server.use(jsonContentType)
server.use(restify.queryParser())
server.use(passport.initialize())
server.use(passport.session())

passport.serializeUser((user, done) ->
  done(null, user)
)

passport.deserializeUser((obj, done) ->
  done(null, obj);
)

server.get("/", (req, res, next) -> 
    res.send(
        message: "hello world!"
    )
)

server.get("/auth/google", passport.authenticate("google"))

server.get("/auth/google/return", passport.authenticate("google", {
    failureRedirect: "/"
}), (req, res, next) -> 
    res.header 'Location', '/'
    res.send 302 # redirect
)

server.listen(8080, -> console.log("restify listening on 8080"))