javascript - node.js中的路由堆叠

Question

var express = require('express');
var router = express.Router();
router.use(function(req, res, next){
    console.log(req.user)
    if(!req.user){
        res.redirect('/login');
     }else{
        res.locals.username = req.user.username;
        return next();
     }
});

//this won't work
router.get('/register', function(req, res, next) {
  res.render('register');
});

第一个 block 很有意义并且正在运行，我能够拥有一个带有 protected 路由的登录系统。但同时它破坏了我的第二位，它会显示登录页面，尽管我尝试导航到 localhost:3000/register。

Answer 1

当您使用 router.use() 时，您是在告诉路由器在接下来的所有 roter.get() 路由中使用该函数中间件。所以在这里，顺序是有道理的。如果你关心秩序，你可以做@bloodyKnuckles 做的事。或者，如果您想为您的路线保留该模式，您可以执行以下操作:

// Routes that don't need authorization like register
router.get('home',...);
router.get('register',...);

// Use your authorization middleware
router.use(function(req, res, next){
  console.log(req.user)
  if(!req.user){
    res.redirect('/login');
  }else {
    res.locals.username = req.user.username;
    return next();
  }
});

// At this point you're using the authorization middleware. 
// Any routes declared from here will call authorization middleware before its handler.
router.get('profile', ...);