Vue实现用户登录导航守卫

**在前后端完全分离的情况下,Vue项目中实现token验证大致思路如下:
1、第一次登录的时候,前端调后端的登陆接口,发送用户名和密码
2、后端收到请求,验证用户名和密码,验证成功,就给前端返回一个token
3、前端拿到token,将token存储到localStorage和vuex中,并跳转路由页面
4、前端每次跳转路由,就判断 localStroage 中有无 token ,没有就跳转到登录页面,有则跳转到对应路由页面
5、每次调后端接口,都要在请求头中加token
6、后端判断请求头中有无token,有token,就拿到token并验证token,验证成功就返回数据,验证失败(例如:token过期)就返回401,请求头中没有token也返回401
**

一、 调登录接口成功,在回调函数中将token存储到localStorage和vuex中

  1. login.vue
<template>
  <div>
    <input type="text" v-model="loginForm.username" placeholder="用户名"/>
    <input type="text" v-model="loginForm.password" placeholder="密码"/>
    <button @click="login">登录</button>
  </div>
</template>
 
<script>
import {
    
     mapMutations } from 'vuex';
export default {
    
    
  data () {
    
    
    return {
    
    
      loginForm: {
    
    
        username: '',
        password: ''
      }
    };
  },
 
  methods: {
    
    
    ...mapMutations(['changeLogin']),
      submitForm(formName) {
    
    
        this.$refs[formName].validate((valid) => {
    
    
          if(this.ruleForm.name && this.ruleForm.pass && this.ruleForm.phone){
    
    
          //后端验证
            this.$axios.post('http://10.70.50.6:3000/adminuser/main/findone',{
    
    
              password : this.ruleForm.pass,
              phone : this.ruleForm.phone
            }).then(res => {
    
    
              console.log(res.data);
              if(res.data.code === 1){
    
    
              //唯一标识
                this.userToken = 'Bearer ' + this.ruleForm.phone;
                // 将用户token保存到vuex中
                this.changeLogin({
    
     Authorization: this.userToken });
                this.$router.push('/main');
                this.$message({
    
    
                  message: '登录成功',
                  type: 'success'
                });
              }else if(res.data.code === 2){
    
    
                this.$message({
    
    
                  message: '密码错误',
                  type: 'error'
                });
              }else if(res.data.code === 3){
    
    
                this.$message({
    
    
                  message: '手机号错误,用户不存在',
                  type: 'error'
                });
              }else if(res.data.code === 4){
    
    
                this.$message({
    
    
                  message: '登录异常',
                  type: 'error'
                });
                localStorage.removeItem('Authorization');
                this.$router.push('/login');
              }
                // alert('请登录')
                // localStorage.removeItem('Authorization');
                // this.$router.push('/login');
            }).catch(error => {
    
    
              this.$message({
    
    
                  message: '提交表单出错',
                  type: 'error'
                });
              console.log(error);
            });
          }
        })
      },
  }
};
</script>
  1. store文件夹下的index.js
export default new Vuex.Store({
    
    
  state: {
    
    
    //存储token
    Authorization: localStorage.getItem('Authorization') ? localStorage.getItem('Authorization') : '',
    uerName : '',
  },
  mutations: {
    
    
    // 修改token,并将token存入localStorage
    changeLogin (state, user) {
    
    
      state.Authorization = user.Authorization;
      console.log(state.Authorization);
      localStorage.setItem('Authorization', user.Authorization);
    }
  },
  actions: {
    
    
  },
  modules: {
    
    
  }
})

二、路由导航守卫

router文件夹下的index.js

const router = new VueRouter({
    
    
  mode: 'history',
  base: process.env.BASE_URL,
  routes
})

// 登录验证,导航守卫
// 使用 router.beforeEach 注册一个全局前置守卫,判断用户是否登陆
router.beforeEach((to, from, next) => {
    
    
  if (to.path === '/login') {
    
    
    next();
  } else {
    
    
    let token = localStorage.getItem('Authorization');
    console.log(token);
    if(token === null || token === ''){
    
    
      this.$message({
    
    
        message: '请登录',
        type: 'error'
      });
      next('/login');
      console.log('非登录入口' + token);
    }else{
    
    
      // next('/login');
      console.log('登录入口' + token);
      next();
    }
  }
});

三、请求头加token
main.js文件

// 添加请求拦截器,在请求头中加token
axios.interceptors.request.use(
  config => {
    
    
    if (localStorage.getItem('Authorization')) {
    
    
      config.headers.Authorization = localStorage.getItem('Authorization');
    }
    return config;
  },
  error => {
    
    
    return Promise.reject(error);
  });

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转载自blog.csdn.net/qq_45021462/article/details/110288506