nodejs 搭建简易服务器

const express=require('express');
const static=require('express-static'); //托管静态文件
const cookieParser=require('cookie-parser');　　//解析cookie
const cookieSession=require('cookie-session');　　//解析session
const bodyParser=require('body-parser');　　　　//解析post数据
const multer=require('multer');
const consolidate=require('consolidate');
const mysql=require('mysql');

//连接池
const db=mysql.createPool({host: 'localhost', user: 'root', password: '123456', database: 'blog'});

var server=express();
server.listen(8080);

//1.解析cookie
server.use(cookieParser('sdfasl43kjoifguokn4lkhoifo4k3'));

//2.使用session
var arr=[];
for(var i=0;i<100000;i++){
arr.push('keys_'+Math.random());
}
server.use(cookieSession({name: 'zns_sess_id', keys: arr, maxAge: 20*3600*1000}));

//3.post数据
server.use(bodyParser.urlencoded({extended: false}));
server.use(multer({dest: './www/upload'}).any());

//4.配置模板引擎
//输出什么东西
server.set('view engine', 'html');
//模板文件放在哪儿
server.set('views', './template');
//哪种模板引擎
server.engine('html', consolidate.ejs);

//接收用户请求
server.get('/', (req, res, next)=>{
//查询banner的东西
db.query("SELECT * FROM banner_table", (err, data)=>{
if(err){
res.status(500).send('database error').end();
}else{
res.banners=data;

next();
}
});
});
server.get('/', (req, res, next)=>{
//查询文章列表
db.query('SELECT ID,title,summery FROM article_table', (err, data)=>{
if(err){
res.status(500).send('database error').end();
}else{
res.articles=data;

next();
}
});
});
server.get('/', (req, res)=>{
res.render('index.ejs', {banners: res.banners, articles: res.articles});
});

server.get('/article', (req, res)=>{
res.render('conText.ejs', {});
});

//4.static数据
server.use(static('./www'));

<div class="content">
<div class="banner">
<ul class="clearfix">
<% for(var i=0;i<banners.length;i++){ %>
<li>
<img src="<%= banners[i].src %>" alt=""/>
<div class="text-box">
<h2><%= banners[i].title %></h2>
<p><%= banners[i].sub_title %></p>
</div>
</li>
<% } %>
</ul>
<ol>
<li class="active"></li>
<li></li>
<li></li>
</ol>
</div>
<div class="newsList">
<ul>
<% for(var i=0;i<articles.length;i++){ %>
<li>
<a href="/article?id=<%= articles[i].ID %>">
<h2><%= articles[i].title %></h2>
<p><%= articles[i].summery %></p>
</a>
</li>
<% } %>
</ul>
</div>
</div>