app.js
var express = require('express');
var app = express();
app.use('/',require('./control'));
app.use('/',require('./data'));
app.use('/',require('./logic'));
app.listen(8000);
control.js
/**
权限层
*/
var router = require('express').Router();
router.get('/',function(req,res,next){
var group = req.query.group;
if(group){
next();
}else{
next('无权访问！');
}
});
module.exports = router;
//如果这里的next(err)里面带有参数，则不会执行后面的路由
db.js
module.exports = {
getUser(){
//数据库数据
},
getNews(){
//数据库数据
}
}
data.js
/**
数据层
一般数据层不会直接和数据库挂钩，通常会由和数据库耦合的模块进行处理，然后传递数据
*/
var router = require('express').Router();
var dbs = require('./db');
router.get('/',function(req,res,next){
console.log('next的值：',next);
res.locals.name = '老王';
next();
});
router.get('/info',function(req,res,next){
dbs.getUser(function(user){
dbs.getNews(function(news){
res.locals.user = user;
res.locals.news = news;
});
});
});
module.exports = router;
login.js
/**
业务层
*/
var router = require('express').Router();
router.get('/',function(req,res,next){
var name = res.locals.name;
var a = parseInt(req.query.a);
var b = parseInt(req.query.b);
res.send(name + (a+b));
});
module.exports = router;