Twitterでログインするやつを、node + express + Redisにセッションを保存する実装

app.js

var express = require('express'),
    RedisStore = require('connect-redis')(express),
    OAuth = require('oauth').OAuth,
    app = express();
var redisConfig = require(__dirname + '/redis.json');

app.use(express.favicon());
app.use(express.cookieParser());
app.use(express.session({
  secret: 'deadbeef',
  key: "_sid",
  cookie: { maxAge: 1000 * 60 * 60 }, // ミリ秒で指定する
  store: new RedisStore(redisConfig)
}));

app.use(count); // debug
app.set("views", __dirname);
app.set("view engine", "jade");

var _consumerKey = "TODO: your application key";
var _consumerSecret = "TODO: your application secret";

var requestTokenUrl = "https://api.twitter.com/oauth/request_token";
var authenticateUrl = "https://api.twitter.com/oauth/authenticate";
var accessTokenUrl = "https://api.twitter.com/oauth/access_token";
var callbackUrl = "http://localhost:8888/oauth/callback";

function count(req, res, next) {
  req.session.count = req.session.count || 0;
  var n = req.session.count++;
  console.log('viewed ' + n + ' times');
  next();
}

function isAuthorized(req, res, next) {
  if (req.url != '/' && !req.session.oauthAccessToken) {
    res.redirect('/');
    return;
  }
  if (req.url != '/top' && req.session.oauthAccessToken) {
    res.redirect('/top');
    return;
  }
  next();
}

function _OAuth() {
  return new OAuth(
    requestTokenUrl, accessTokenUrl, _consumerKey, _consumerSecret, "1.0A", callbackUrl, "HMAC-SHA1"
  );
}

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

app.get('/top', isAuthorized, function(req, res) {
  res.render('top');
});

app.get('/auth/twitter', function(req, res) {
  var oauth = _OAuth();
  oauth.getOAuthRequestToken(function(err, oauthToken, oauthTokenSecret, results) {
    if (err) { console.log(err); return; }
    req.session.oauthToken = oauthToken;
    req.session.oauthTokenSecret = oauthTokenSecret;
    res.redirect(authenticateUrl + "?oauth_token=" + oauthToken);
  });
});

app.get('/oauth/callback', function(req, res) {
  var oauth = _OAuth();
  oauth.getOAuthAccessToken(
    req.session.oauthToken,
    req.session.oauthTokenSecret,
    req.query.oauth_verifier,
    function(err, oauthAccessToken, oauthAccessTokenSecret, results) {
      if (err) { console.log(err); return; }
      req.session.oauthAccessToken = oauthAccessToken;
      req.session.oauthAccessTokenSecret = oauthAccessTokenSecret;
      res.redirect('/top');
  });
});

index.jade

!!! 5
html(lang="ja")
  head
    meta(charset="utf-8")
    title="Twitter Login with Express"
  body
    h1="Not Logined"
    a(href="/auth/twitter") login with Twitter Account

redis.json

{
  "host": "127.0.0.1",
  "port": "6379",
  "ttl": 3600,
  "db": 9,
  "prefix": "_sid:"
}

top.jade

!!! 5
html(lang="ja")
  head
    meta(charset="utf-8")
    title="Twitter Logined Page"
  body
    h1="Logined!"