vue+express 构建后台管理系统的示例代码

npm install -g vue-cli

vue init webpack my-express

cd my-express
npm install
npm run dev

var mysql = require("mysql");
var connection = mysql.createConnection({
  host:"",
  port: 3306,
  user:"root",
  password:"",
  database:"",
  useConnectionPooling: true
});

function query(sql,data,callback){
  // connection.connect()
  // pool.getConnection(function(err,connection){
    connection.query(sql,data,function (err,rows) {
      callback(err,rows);
      // connection.release();
      // connection.end() 
    });
  // });
}

exports.query = query;

var express = require('express');
var router = express.Router();
var db = require("../config/db");
const jwt = require('jsonwebtoken')
const token = require("../config/token")
var data={data:'',meta:{code:'200',message:''}}
/* GET users listing. */
router.post('/add', function(req, res, next) {
  let username = req.body.username;
  let password = req.body.password;
  db.query("SELECT username FROM users where username=(?)",[username],function(err,rows){
    console.log(err,rows)
    if(rows.length>0){
      data={data:'',meta:{code:'500',message:'用户名存在'}}
      res.send(data)
    }else{
      db.query("INSERT INTO `users` (`username`,`password`) VALUES (?,?)",[username,password],function(err,rows){
        data={data:'',meta:{code:'200',message:'注册成功'}}
        res.send(data)
      });  
    }
  });
});

npm install jsonwebtoken

const crypto = require('jsonwebtoken')
const secret = "JWT-TOKEN"
const token={
  createToken:function(obj,timeout){
    // Token 数据
    let payload = {
      name: obj.username,
      admin: true
    };
    // 密钥
    
    // 签发 Token
    let tokens = crypto.sign(payload, secret, { expiresIn: 3600})
    return tokens;
  },
  decodeToken:function(tokens){
    console.log(tokens)
    let res = false;
    crypto.verify(tokens, secret , function(err,decoded) {
      if(err){
        res = {'flag':false,'decoded':decoded}
      }else{
        res = {'flag':true,'decoded':decoded}
      }
      })
    return res;
  },
  checkToken:function(token){
    var resDecode=this.decodeToken(token);
    if(!resDecode){
      return false;
    }
    //是否过期
    var expState=(parseInt(Date.now()/1000)-parseInt(resDecode.payload.created))>parseInt(resDecode.payload.exp)?false:true;
    if(resDecode.signature===resDecode.checkSignature&&expState){
      return true;
    }
    return false;
  }
};
module.exports=exports=token;

app.all('*', function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header('Access-Control-Allow-Methods', 'PUT, GET, POST, DELETE, OPTIONS');
  res.header("Access-Control-Allow-Headers", "Content-Type, access_token, X-Requested-With")
  // res.header("Content-Type", "application/json;charset=utf-8");
  console.log(req.originalUrl,'11111')
  if(rouetpass.indexOf(req.originalUrl) > -1 || req.originalUrl.split('/').indexOf('static') > -1){

    next()
  }else{
    if (req.method != "OPTIONS"){
      var accesstoken = req.headers['access_token'];
      let datatoken = token.decodeToken(accesstoken)
      // console.log(data)
      if(datatoken.flag){
        next()
      }else{
        data.meta.code=401;
        res.send(data) 
      }
    }else{
      next()
    }
  }
});