Express.js:使用会话中间件后无法重定向

Question

我正在编写一个身份验证中间件,它应该在成功登录我们的注销后重定向到以前访问过的页面.这是完整的配置块:

app.configure(function(){
  app.set('views', __dirname + '/views');
  app.set('view engine', 'jade');
  app.use(express.static(__dirname + '/public'));
  app.use(express.bodyParser());
  app.use(express.cookieParser());
  app.use(express.session({ secret: '__YouDontKnow__', store: new RedisStore }));
  app.use(authCheck.run);
  app.use(express.methodOverride());
  app.use(app.router);
});

现在,当app.use(authCheck.run)是下app.use(express.session),快速抛出错误:错误:发送之后无法设置头.

如果我在上面移动此调用app.use(express.session),则会抛出500错误,说明会话未定义.我的auth函数取决于会话对象.

我能做什么？

编辑:这是authCheck功能:

exports.run = function (req, res, next) {
  var urlparser = GLOBAL.urlparser,
      url = req.urlp = urlparser.parse(req.url, true),

      goToLastPage = function() {
        var redirectUrl = (req.session.lastVisitedPage) ? req.session.lastVisitedPage : '/';
        console.log("goToLastPage(%s)", redirectUrl);
        res.redirect(redirectUrl);
        return;
      }

  // Log out
  if (url.pathname == '/user/logout') {
    req.session.destroy();
    console.log('User has logged out');
    goToLastPage();
  }

  // Log in
  if (url.pathname == '/user/login' && req.method == 'POST') {
    var email = req.body.login.email,
        password = req.body.login.password;

    req.session.auth = true;
    req.session.userId = 1;

    console.log('User has logged in');

    goToLastPage();
  }

  next();
  return;
}

Answer 1

把return你叫后goToLastPage().next()在你调用链接res.redirect中调用下一个中间件后,你仍然在打电话,最终可能最终击中你的一条路线,然后尝试设置一个标头并失败.