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nodejs+express+mysql+jwt接口安全验证

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2020-07-24 / 0 评论 / 0 点赞 / 10223 阅读 / 4246 字

nodejs+express+mysql+jwt接口安全验证

  1. 一段token aaa.bbb.ccc分别有头部,载荷和签名组成。

  2. 用户登录成功后服务端返回token(jwt.sign()方法)。

  3. 客户端请求其他接口,不管是post,get或者在headers里面判断是否有token(jwt.verify())。


第一部分:服务器设置

var express = require('express');
var app = express();
var bodyParser = require('body-parser');
var jwt = require('jsonwebtoken');
var secretkey = 'secretkey';   //加密字段
//获取数据库连接对象
var connection = require('./mysql/db');
//处理post字段请求
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
 
//建立拦截器处理跨域请求
app.all(function(req, res, next) {
    res.header("Access-Control-Allow-Credentials", true);
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "X-Requested-With");
    res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
    res.header("Content-Type", "application/json;charset=utf-8");
    next();
});
app.use(function(req,res,next){
    if(req.url !='/user/login' && req.url !='/user/register'){
        //token可能存在post请求和get请求
        let token = req.body.token || req.query.token || req.headers.token;
        jwt.verify(token,secretkey,function(err,decode){
           if(err){
               res.json({
                   message: 'token过期,请重新登录',
                   resultCode: '403'
               })
           }else{
               next();
           }
        })
    }else{
        next();
    }
})

第二部分:mysql的连接方法


var mysql = require('mysql');
var dbMsg = {
    host     : 'localhost',
    user     : 'root',
    password : '123456',
    database : 'app_pro'
}
 
 
var connection = mysql.createConnection(dbMsg);
    connection.connect();
module.exports=connection;

第三部分:POST请求接口

app.get('/',function(req,res){
    res.send('请求home成功');
})
 
//用户登录
app.post('/user/login', (req,res) => {
    var name = req.body.username;
    var passwd = req.body.password;
    if(!name||!passwd){
        res.status='404';
        res.send({
            message: '用户名或密码错误',
            resultCode: 1
        })
        return;
    }
    var userStr = `select * from user where username="${name}" and password="${passwd}"`;
    connection.query(userStr,function(err,result){
        if(err){
            throw err;
        }else{
            var token = jwt.sign({username:name},secretkey,{expiresIn: 60*8});
            res.json({
                message: '请求成功',
                token: token
            })
        }
    })
})
//获取用户列表
app.post('/user/getList',(req,res)=>{
    var listStr = `select * from user`;
    connection.query(listStr,function (err,result) {
        if(err) throw err;
        res.json({
            message: '请求成功',
            resultCode: 1,
            info: result
        })
    })
})
//用户注册
app.post('/user/register',(req,res)=>{
    var name = req.body.username;
    var passwd = req.body.password;
    if(!name || !passwd){
        res.send({
            message: '用户名或密码错误',
            resultCode: 1
        })
        return;
    }
 
    var json = {};
    var userStr = `select * from user where username="${name}" and password="${passwd}"`;
    connection.query(userStr,function(err,result){
        if(err) throw err;
        if(result.length>0){
            json.message= '请求失败用户已经存在';
            json.resultCode = 1;
        }else{
            json.message = '请求成功';
            json.resultCode = 0;
            var insertStr = `insert into user (username, password) values ("${name}", "${passwd}")`;
            console.log(insertStr)
            connection.query(insertStr,function(err,res){
                if(err) throw err;
            })
        }
        res.send(JSON.stringify(json))
    })
})
 
 
const port =  3001;
app.listen(port, () => {
    console.log('Express server listening on port ' + port);
});
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