Is there an alternative method to retrieve the client's user agent if getStaticProps and getServerSideProps cannot be used together?

I am currently facing a challenge with the website I'm working on as it lacks a responsive design. This means that the view I display is dependent on the user agent of the client. In order to achieve this, I have been using getServerSideProps to determine which view to render. However, after analyzing the website's requirements, I believe it would be more beneficial to utilize getStaticProps and revalidate it every 3 minutes. The only issue is that getStaticProps and getServerSideProps cannot coexist. Is there an alternative method to access user agent headers?

util.js

import * as Parser from "ua-parser-js";

export const isMobile = (req) => {
  let ua;
  if (req) {
    ua = Parser(req.headers["user-agent"] || "");
  } else {
    ua = new Parser().getResult();
  }
  return (
    ua?.device?.type === "mobile"
  );
};

somepage.js

import { isMobile } from "util";
import { useEffect } from "react";

const SomePage = ({ isMobile }) => {
  return isMobile ? <View1 /> : <View2 />;
};

export default SomePage;

export async function getServerSideProps({ req }) {
  return {
    props: {
      isMobile: isMobile(req),
    },
  };
}

Answer №1

In my opinion, implementing middleware in Next.js could be a solution for your situation.

Here is a link to more information on using middleware in Next.js: https://nextjs.org/docs/advanced-features/middleware

By utilizing middleware (such as auth), you can access the User agent header and even make direct modifications to requests and responses.

With middleware, you may find it beneficial to leverage getserversideProps and use getStaticprops within your page folder.

Answer №2

If you find yourself in this scenario, the recommended approach is to utilize the ISR method, which can be achieved by using the getStaticProps function with an interval. When a cached version of the page is available, it is served to the user using the SSG method. If there is no cache present or the cache has expired, the page is rendered using the SSR method.

export async function getStaticProps() {
 
  return {
    props: {
    },

    revalidate: 10,
  }
}

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