Sign in with twitter

app.js

// This program is free software. It comes without any warranty, to
// the extent permitted by applicable law. You can redistribute it
// and/or modify it under the terms of the Do What The Fuck You Want
// To Public License, Version 2, as published by Sam Hocevar. See
// http://sam.zoy.org/wtfpl/COPYING for more details.

var express = require('express');
var app = express.createServer();
var oauth = new (require('oauth').OAuth)(
    'https://api.twitter.com/oauth/request_token',
    'https://api.twitter.com/oauth/access_token',
    'CONSUMER KEY',
    'CONSUMER SECRET',
    '1.0',
    'http://localhost:3000/auth/twitter/callback',
    'HMAC-SHA1'
);

app.configure(function() {
    app.use(express.logger());
    app.use(express.bodyParser());
    app.use(express.cookieParser());
    app.use(express.session({ secret: "secret" }));
    app.set('view engine', 'jade')
});

app.dynamicHelpers({
    session: function(req, res) {
        return req.session;
    }
});

app.get('/', function(req, res) {
    res.render('index', { layout: false });
});

app.get('/auth/twitter', function(req, res) {
    oauth.getOAuthRequestToken(function(error, oauth_token, oauth_token_secret, results) {
        if(error) {
            res.send(error)
        } else {
            req.session.oauth = {};
            req.session.oauth.token = oauth_token;
            req.session.oauth.token_secret = oauth_token_secret;
            res.redirect('https://twitter.com/oauth/authenticate?oauth_token=' + oauth_token);
        }
    });
});

app.get('/auth/twitter/callback', function(req, res) {
    if(req.session.oauth) {
        req.session.oauth.verifier = req.query.oauth_verifier;

        oauth.getOAuthAccessToken(req.session.oauth.token, req.session.oauth.token_secret, req.session.oauth.verifier,
            function(error, oauth_access_token, oauth_access_token_secret, results) {
                if(error) {
                    res.send(error);
                } else {
                    req.session.oauth.access_token = oauth_access_token;
                    req.session.oauth.access_token_secret = oauth_access_token_secret;
                    req.session.user_profile = results
                    res.redirect('/');
                }
            }
        );
    }
});

app.get('/signout', function(req, res) {
    delete req.session.oauth;
    delete req.session.user_profile;
    res.redirect('/');
});

app.listen(3000);

index.jade

!!! 5
html(lang="ja")
  head
    title node.js sample app
  body
    h1 node.js sample app
    - if (session.user_profile)
      p= "Welcome, " + session.user_profile.screen_name
      p
        a(href="/signout") Sign out
    - else
      p
        a(href="/auth/twitter") Sign in with twitter