Integrating cookies-next with Axios Interceptors in Next.js: A Comprehensive Guide

Описание: Learn how to effectively integrate `cookies-next` with Axios interceptors in your Next.js application to manage tokens seamlessly. This guide provides step-by-step instructions and troubleshooting tips.
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Integrating cookies-next with Axios Interceptors in Next.js

In modern web applications, managing user authentication and maintaining session state is essential. When building applications with Next.js, you might find yourself needing to integrate cookie management with API request handling. In this guide, we'll investigate a common issue faced by developers: using the cookies-next library within Axios interceptors. Specifically, we'll address how to properly implement setCookie() and getCookie() functions in your application.

The Problem

Many developers encounter difficulties when trying to set cookies with cookies-next during API calls made via Axios. One user posed the question: they were able to retrieve token values but found that using setCookie() did not seem to affect the cookie storage in their application.

Here's a simplified version of the code causing the issue:

[[See Video to Reveal this Text or Code Snippet]]

Despite console logging the received token and refreshToken values, the cookies were not being set properly. Let's explore the solution.

The Solution

Understanding the Context

The key to resolving this issue lies in understanding the context in which the cookies-next functions operate. The getCookie() and setCookie() methods are designed to function correctly only on the client side within Next.js. When they are called in a server-side context, they may not behave as intended, leading to the issue of cookies not being set.

Updated Implementation

To effectively manage cookies during API interactions, you should ensure that your Axios interceptors check for tokens on the client side where cookies-next methods operate correctly. Here's an improved version of the implementation:

[[See Video to Reveal this Text or Code Snippet]]

Key Changes Made:

Client-Side Calls: Ensure that all calls to getCookie() and setCookie() are made when you are on the client side.

Handling Unauthorized Requests: In the response interceptor, check for a 401 unauthorized error and attempt to refresh the token using the existing refresh token.

Setting Authorization Header: Update the Authorization header for any subsequent requests once you have successfully retrieved a new token.

Conclusion

Integrating cookies-next with Axios interceptors requires a proper understanding of client-side versus server-side contexts in Next.js. By maintaining a clear approach of using cookie functions on the client side, you can manage user authentication tokens effectively.

If you are encountering similar issues, make sure that your cookie management logic aligns with the client-side environment and consider implementing token refresh strategies as demonstrated.

Feel free to share your experiences or any further questions you may have on this topic!