How to handle user identity authentication and authorization in Vue technology development

How to handle user identity authentication and authorization in Vue technology development

In Vue technology development, user identity authentication and authorization are a very important part. Identity authentication is the process of confirming the user's identity, while authorization is the granting of corresponding permissions based on the user's identity. This article will introduce how to handle user authentication and authorization in Vue development, and provide some specific code examples.

1. User identity authentication

User identity authentication generally includes username and password verification, third-party login verification, etc. In Vue development, we can use some commonly used identity authentication libraries, such as axios to send and receive login requests. Here is a sample code:

// 登录请求
import axios from 'axios';

axios.post('/api/login', {
  username: 'admin',
  password: '123456'
})
.then(function (response) {
  // 登录成功，保存token到localStorage
  localStorage.setItem('token', response.data.token);
})
.catch(function (error) {
  // 登录失败，提示错误信息
  console.log(error);
});

In the above example, we used axios to send a login request to the backend and save the returned token to localStorage upon success. middle.

2. User authorization

User authorization is to grant corresponding permissions based on the user's identity. In Vue development, we can use routing guards to handle user authorization. The following is a sample code:

// 路由守卫
import router from './router';

router.beforeEach(async (to, from, next) => {
  // 获取用户token
  const token = localStorage.getItem('token');

  if (token) {
    // 已登录，判断用户权限
    const hasPermission = await checkPermission(token);
    
    if (hasPermission) {
      // 有权限，继续访问
      next();
    } else {
      // 没有权限，跳转到无权限页面
      next('/no-permission');
    }
  } else {
    // 未登录，跳转到登录页面
    next('/login');
  }
});

// 权限检查函数
function checkPermission(token) {
  return new Promise((resolve, reject) => {
    axios.get('/api/checkPermission', {
      headers: {
        Authorization: `Bearer ${token}`
      }
    })
    .then(function (response) {
      resolve(response.data.hasPermission);
    })
    .catch(function (error) {
      reject(error);
    });
  });
}

In the above example, we use the beforeEach function of router to process routing guards. Before each route jump, we will first obtain the user's token, and then determine whether the user is logged in or not based on the token. If the user is logged in, we will send a permission check request to the backend through the checkPermission function, and determine whether there is permission to access the route based on the returned result.

It should be noted that in actual development, the verification of user permissions should be performed on the backend, and the frontend only provides the corresponding interface for the backend to call.

To sum up, the core of handling user identity authentication and authorization in Vue technology development is to handle request sending and routing jump accordingly. The above code examples can help developers better understand and master how to handle user authentication and authorization.

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