搭建Nodejs服务器

1.搭建Nodejs服务器

var http = require("http");
   
http.createServer(function(req, res) {
  res.writeHead( 200 , {"Content-Type":"text/html"});
  res.write("<h1>Node.js</h1>");
  res.write("<p>Hello World</p>");
  res.end("<p>beyondweb.cn</p>");
}).listen(8080);
console.log("HTTP server is listening at port 8080.");

2.使用express搭建Nodejs服务器

const express=require('express');
const static=require('express-static');
const cookieParser=require('cookie-parser');
const cookieSession=require('cookie-session');
const bodyParser=require('body-parser');
const multer=require('multer');
const consolidate=require('consolidate');
const mysql=require('mysql');

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

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: '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);

//5.接收用户请求
server.get('/', (req, res)=>{
  //查询banner的东西
  db.query("SELECT * FROM article_table", (err, data)=>{
    if(err){
      console.log(err);
      res.status(500).send('database error').end();
    }else{
      console.log(data);
      res.render('index.ejs', {articles: data});
    }
  });
});

//6..static数据
server.use(static('./www'));