How do I implement a refresh token mechanism in Vue 3 with Axios?

How do I implement a refresh token mechanism in Vue 3 with Axios?

To implement a refresh token mechanism in Vue 3 with Axios, you can follow these steps: 1. Store the access and refresh tokens in local storage. 2. Set up an Axios interceptor to handle 401 errors. 3. When a 401 error occurs, use the refresh token to request a new access token. 4. Update the stored access token and retry the original request.

Can you show me a code example for the Axios interceptor?

Sure! Here's a basic example:

import axios from 'axios';

const apiClient = axios.create({ baseURL: 'https://api.example.com' });

apiClient.interceptors.response.use(
  response => response,
  async error => {
    const originalRequest = error.config;
    if (error.response.status === 401 && !originalRequest._retry) {
      originalRequest._retry = true;
      const refreshToken = localStorage.getItem('refreshToken');
      const { data } = await apiClient.post('/refresh-token', { token: refreshToken });
      localStorage.setItem('accessToken', data.accessToken);
      apiClient.defaults.headers.common['Authorization'] = 'Bearer ' + data.accessToken;
      return apiClient(originalRequest);
    }
    return Promise.reject(error);
  }
);

This code sets up an interceptor that checks for 401 errors and attempts to refresh the token.

What should I do if the refresh token also expires?

If the refresh token expires, you should redirect the user to the login page and prompt them to log in again. You can also clear the stored tokens from local storage to ensure they don't have access to protected resources.

Is there a way to automatically log the user out when the refresh token expires?

Yes, you can implement a check for the refresh token's expiration time when making requests. If it's expired, you can log the user out automatically by clearing the tokens and redirecting them to the login page.