基于jwt的用户登录认证

'use strict';

let mongoose = require('mongoose'),
	Schema = mongoose.Schema;
	
let userSchema = new Schema({
	"username": String,
	"password": String,
	"token": String,
    	"create_time": Date
    });

let users = mongoose.model('users', userSchema);

module.exports = users;

const express = require('express');
const router = express();
const db=require('../db/db.js');
const User=require('../db/user.js');
const Login=require('../db/login.js');
const Fan=require('../db/fan.js');
const Power=require('../db/power.js');
const createToken = require('../token/createToken');
const checkToken = require('../token/checkToken');

// 注册
router.post('/add', function(req, res, next){
	let username = req.body.username,
		password = req.body.password;
	let newUser = new User({
		username: req.body.username,
		password: req.body.password
	});
	User.findOne({"username":username},(err, result) => {
		if(err){
			console.log('error:' + err);
			return;
		}
		console.log('result:',result);
		if(!result){
			newUser.save(function(err, result){
				if(err){
					console.log('error:' + err);
					return;
				}
				res.send({success: true, msg: '注册成功'});
			});
		}else{
			res.send({success: false, msg: '用户名已经存在'});
		}
	});
});

// 登录
router.post('/login', function(req, res, next){
	let username = req.body.username,
		password = req.body.password;
	
	User.findOne({"username":username},(err, result) => {
		if(err){
			res.send({success: false, msg: '用户名不存在'})
			console.log('error:' + err);
			return;
		}
		console.log('result:',result)
		if(result.password === password){
			console.log('登录成功')
　　　　　　　　　　　　　　 // 调用token生成函数
			let _token = createToken(username);
			// 保存token到数据库中
			result.token = _token;
			result.save((err) => {
				if(err){
					console.log('error:' + err + 'token')
				}
			})
			if(result){
				res.send({success: true, msg: '登录成功', token: _token});
			}else{
				res.send({success: false, msg: '登录失败'});
			}
		}else{
			res.send({success: false, msg: '密码错误'});
		}
		
	});
});

// token
router.post('/createtoken', function(req, res, next){
	let username = req.body.username;

	User.findOne({"username":username},(err, result) => {
		if(err){
			res.send({success: false, msg: '用户名不存在'})
			console.log('error:' + err);
			return;
		}
		console.log('result:',result)
	
		let token = createToken(username);
		
		result.token = token;
		result.save((err) => {
			if(err){
				console.log('error:' + err + 'token')
			}
		})
		if(result){
			res.send({success: true, msg: '登录成功', token: token});
		}else{
			res.send({success: false, msg: '登录失败'});
		}
		
		
	});
});

// 删除用户
// 删除用户时，验证token信息是否过期
router.get('/delete', checkToken, function(req, res, next){
	let _username = req.body.username;
	User.remove({username: _username}, (err, result) => {
		if(err){
			console.log('error:' + err);
			return;
		}
		res.send(result);
	});
});


module.exports = router;

const jwt = require('jsonwebtoken');


module.exports = function(user_id){
    const token = jwt.sign({
        user_id: user_id
    }, '1025886304@qq.com', {
        expiresIn: 60  //过期时间设置为60
    });
    return token;
};

const jwt = require('jsonwebtoken');
//检查token是否过期

module.exports = function(req, res, next) {
　　 // 获取请求头文件中的token信息
    let token = req.body.token || req.query.token || req.headers['authorization'];
    console.log(token)
    // 解析 token
    if (token) {
        // 确认token是否正确
        let decoded = jwt.decode(token, '1025886304@qq.com');
        console.log(decoded,44444)
        // 验证token是否过期
        if(token && decoded.exp <= new Date()/1000){
            return res.json({ success: false, message: 'token过期' });
        }else{
            return next();
        }
    } else {
        // 如果没有token，则返回错误
        return res.status(403).send({
            success: false,
            message: '没有提供token！'
        });
    }
};

const express = require("express");
var bodyParser=require('body-parser');
const app = express();
const api = require('./router/api')

// 跨域设置
app.all("*", function(req, res, next) {
	res.header("Access-Control-Allow-Credentials", true);
	res.header("Access-Control-Allow-Origin", "*");
	res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
	res.header("Content-Type", "application/json;charset=utf-8");
	// 设置请求头类型 添加token
	res.header('Access-Control-Allow-Headers', 'Content-Type, Content-Length, Authorization, Accept, X-Requested-With , yourHeaderFeild');
	next();
});

app.use(bodyParser.urlencoded({extended:true}));

app.use("/api", api);

app.get('/', (req, res) => {
	res.send('Hello World');
});

const port = process.env.PORT || 3001;

app.listen(port, () => {
	console.log('Express server listening on port ' + port);
});

module.exports = app;

login () {
    let params = new URLSearchParams();
    params.append('username', this.login_username);
    params.append('password', this.login_password);
    let _token = localStorage.getItem('token');
    let that = this;
    console.log(_token)
    axios.post('http://localhost:3001/api/login', params, {headers:{'Content-Type':'application/x-www-form-urlencoded','Authorization': _token}})
         .then(function(res){
             console.log(res)
             if(res.data.success){
                 let token = res.data.token;
                 localStorage.setItem('token', token);
                 that.$router.push({
                     path: '/index'
                 })
             }
                    })
                    .catch(function(err){
                        console.log(err)
                    });
            },