servergoogle.js

var express = require('express')
  , passport = require('passport')
  , util = require('util')
  , GoogleStrategy = require('passport-google-oauth').OAuth2Strategy;


// API Access link for creating client ID and secret:
// https://code.google.com/apis/console/
var GOOGLE_CLIENT_ID = process.env.GOOGLE_CLIENT_ID;
var GOOGLE_CLIENT_SECRET = process.env.GOOGLE_CLIENT_SECRET;
var CALLBACK_URL =  process.env.CALLBACK_URL;
var REDIRECT_URL = process.env.REDIRECT_URL;

var port = process.env['app_port'] || process.env.PORT || 8080;



// Passport session setup.
//   To support persistent login sessions, Passport needs to be able to
//   serialize users into and deserialize users out of the session.  Typically,
//   this will be as simple as storing the user ID when serializing, and finding
//   the user by ID when deserializing.  However, since this example does not
//   have a database of user records, the complete Google profile is
//   serialized and deserialized.
passport.serializeUser(function(user, done) {
  done(null, user);
});

passport.deserializeUser(function(obj, done) {
  done(null, obj);
});


// Use the GoogleStrategy within Passport.
//   Strategies in Passport require a `verify` function, which accept
//   credentials (in this case, an accessToken, refreshToken, and Google
//   profile), and invoke a callback with a user object.
passport.use(new GoogleStrategy({
    clientID: GOOGLE_CLIENT_ID,
    clientSecret: GOOGLE_CLIENT_SECRET,
    callbackURL: CALLBACK_URL
  },
  function(accessToken, refreshToken, profile, done) {
    // asynchronous verification, for effect...
    process.nextTick(function () {
      
      // To keep the example simple, the user's Google profile is returned to
      // represent the logged-in user.  In a typical application, you would want
      // to associate the Google account with a user record in your database,
      // and return that user instead.
      return done(null, profile);
    });
  }
));




var app = express.createServer(express.static(__dirname + '/public'));

// configure Express
app.configure(function() {
  app.set('views', __dirname + '/views');
  app.set('view engine', 'ejs');
  app.use(express.logger());
  app.use(express.static(__dirname + '/public'));
  app.use(express.cookieParser());
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(express.session({ secret: 'keyboard cat' }));
  // Initialize Passport!  Also use passport.session() middleware, to support
  // persistent login sessions (recommended).
  app.use(passport.initialize());
  app.use(passport.session());
  app.use(app.router);
  app.use(express.static(__dirname + '/public'));
});

app.dynamicHelpers({
'host': function(req, res) {
    return req.headers['host'];
  },
'scheme': function(req, res) {
	if (req.headers['x-forwarded-proto'] === undefined){
		return 'http'
	} else {
    	return req.headers['x-forwarded-proto'] || 'http'
	}
  },
'url_no_scheme': function(req, res) {
    return function(path) {
      return '://' + app.dynamicViewHelpers.host(req, res) + path;
    }
  },
});

app.get('/', function(req, res){
  //console.dir(req.user);
  res.render('index3', { 
	layout:    false,
    req:       req,
    app:       app,
    user: req.user 
  });
});

app.get('/account', ensureAuthenticated, function(req, res){
  res.render('account', { user: req.user });
});

app.get('/login', function(req, res){
  res.render('login', { user: req.user });
});

// GET /auth/google
//   Use passport.authenticate() as route middleware to authenticate the
//   request.  The first step in Google authentication will involve
//   redirecting the user to google.com.  After authorization, Google
//   will redirect the user back to this application at /auth/google/callback
app.get('/auth/google',
  passport.authenticate('google', { scope: ['https://www.googleapis.com/auth/userinfo.profile',
                                            'https://www.googleapis.com/auth/userinfo.email'] }),
  function(req, res){
    // The request will be redirected to Google for authentication, so this
    // function will not be called.
  });

// GET /auth/google/callback
//   Use passport.authenticate() as route middleware to authenticate the
//   request.  If authentication fails, the user will be redirected back to the
//   login page.  Otherwise, the primary route function function will be called,
//   which, in this example, will redirect the user to the home page.
app.get('/auth/google/callback', 
  passport.authenticate('google', { failureRedirect: '/login' }),
  function(req, res) {
    res.redirect(REDIRECT_URL);
    //res.writeHead(200);
	//res.end('{ userid: ' + req.user.id + ', username: '+ req.user.displayName + ' }');
  });

app.get('/logout', function(req, res){
  req.logout();
  res.redirect('/');
});

//app.listen(process.env['app_port'] || 3000);
// listen to the PORT given to us in the environment


app.listen(port, function() {
  console.log("Listening on " + port);
});

// Simple route middleware to ensure user is authenticated.
//   Use this route middleware on any resource that needs to be protected.  If
//   the request is authenticated (typically via a persistent login session),
//   the request will proceed.  Otherwise, the user will be redirected to the
//   login page.
function ensureAuthenticated(req, res, next) {
  if (req.isAuthenticated()) { return next(); }
  res.redirect('/login');
}