最近在app的开发过程中，做了一个基于token的用户登录认证，使用vue+node+mongoDB进行的开发，前来总结一下。
token认证流程：
1：用户输入用户名和密码，进行登录操作，发送登录信息到服务器端。
2：服务器端查询数据库验证用户名密码是否正确，正确，通过jsonwebtoken生成token，返回给客户端；否则返回错误信息给客户端。
3：通过本地存储存储获取的token信息，并且会跳转到路由指定的页面。
4：当客户端需要请求数据时，发送请求，并且在请求的头文件中添加本地存储的token信息。
5：服务器端获取到请求头文件中的token信息，解析token信息，验证是否有效，有效，查询数据库，返回请求的数据。
客户端与服务器端关于token的验证示意图：
1：用户登录的模型骨架文件user.js
'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;
2：服务器端api请求文件api.js
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;
3：服务器端token生成文件createToken.js
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;
};
4：服务器端验证token是否正确文件checkToken.js
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 tokenif (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！'});}
};
5：服务器端启动文件
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tokenres.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;
6：vue中用户登录操作
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)});},
