Implementing an auto-refresh token mechanism with Vue Apollo involves handling token expiration and automatically refreshing the token when necessary. To achieve this, you need to use a combination of Vue.js, Apollo Client, and appropriate server-side authentication settings. Below is a step-by-step guide to help you implement auto-refresh token functionality in your Vue Apollo application.

  1. Set Up Server-Side Token Expiration: Ensure that your server has a mechanism to set token expiration and provide an endpoint to refresh the token. The server should return a new access token when the refresh token is sent to this endpoint.

  2. Vue Apollo Configuration: In your Vue project, configure Apollo Client to handle token refreshing. Create a new Apollo Client instance with the necessary authentication headers and middleware. Make sure to add the HttpLink to handle HTTP requests and the ApolloLink for middleware.

javascript
import Vue from 'vue'; import { ApolloClient } from 'apollo-client'; import { InMemoryCache } from 'apollo-cache-inmemory'; import { HttpLink } from 'apollo-link-http'; import { ApolloLink } from 'apollo-link'; import { onError } from 'apollo-link-error'; const httpLink = new HttpLink({ uri: 'your_graphql_api_url', }); // Add your token refreshing logic here const authMiddleware = new ApolloLink((operation, forward) => { // Get the token from your storage (e.g., localStorage) const token = localStorage.getItem('accessToken'); // Add the token to the request headers operation.setContext(({ headers }) => ({ headers: { ...headers, authorization: token ? `Bearer ${token}` : '', }, })); return forward(operation); }); const link = ApolloLink.from([ onError(({ graphQLErrors, networkError }) => { // Handle any errors, e.g., log or display a message console.log('GraphQL Errors:', graphQLErrors); console.log('Network Error:', networkError); }), authMiddleware, httpLink, ]); const apolloClient = new ApolloClient({ link, cache: new InMemoryCache(), }); Vue.use(VueApollo); const apolloProvider = new VueApollo({ defaultClient: apolloClient, }); export default apolloProvider;
  1. Set Up Token Refresh Logic: Implement the token refresh logic in your Vue application. You can add an event listener for token expiration and refresh the token accordingly. When the token refresh is successful, update the access token in your storage.

  2. Handle Token Expiration: In your application, listen for token expiration and trigger the token refresh. You can use JavaScript's setInterval or setTimeout to periodically check the token's expiration time and refresh it when needed.

javascript
function refreshToken() { // Call your token refresh endpoint on the server // For example, using Axios or fetch API // Update the access token in the storage localStorage.setItem('accessToken', 'new_access_token'); } // Calculate the time left until token expiration const expiresInMs = getExpirationTimeFromToken() - Date.now(); // Refresh the token 1 minute before it expires const refreshTime = expiresInMs - 60000; setTimeout(refreshToken, refreshTime);
  1. Handle Token Refresh on Errors: Set up error handling to automatically refresh the token when receiving a 401 Unauthorized response from the server. In the onError method of the Apollo configuration, you can check for the response status and trigger the token refresh accordingly.
javascript
const link = ApolloLink.from([ onError(({ graphQLErrors, networkError }) => { if (networkError && networkError.statusCode === 401) { // Token expired, trigger token refresh refreshToken(); } // Handle any other errors here }), authMiddleware, httpLink, ]);

By following these steps, you can implement an auto-refresh token mechanism in your Vue Apollo application. The token refresh logic will ensure that the access token is automatically updated before it expires, providing a seamless user experience with continuous authentication. Remember to adjust the implementation based on your specific server-side authentication and token management requirements.

Have questions or queries?
Get in Touch