How to add cache control in generated static files (Nuxt 3)

Question

I'm using Nuxt 3 to create an SSR project. I'm thinking of adding the Cache-Control header to the generated static files in the .output/_nuxt directory.

I tried the following code server/middleware/cache-control.ts

export default defineEventHandler((event) => {
  let res = event.res
  const year = 31536000
  const tenmin = 600
  const url = event.req.url
  const maxage = url.match(/(.+).(jpg|jpeg|gif|css|png|js|ico|svg|mjs)/) ? year : tenmin
  res.setHeader('Cache-Control', `max-age=${maxage} s-maxage=${maxage}`);
})

But, it doesn't work.

How to add Cache-Control to the generated static files?

Answer 1

For Nuxt3, I use it as server middleware server/middleware/cache-control.js

export default defineEventHandler((event) => {
  if (process.env.NODE_ENV == "production") {
    const url = event.node.req.url;
    const maxage = url.match(/(.+)\.(jpg|jpeg|gif|png|ico|svg|css|js|mjs)/)
      ? 60 * 60 * 12 * 30
      : 60 * 60;
    appendHeader(
      event,
      "Cache-Control",
      `max-age=${maxage} s-maxage=${maxage}`
    );
  } else {
    appendHeader(event, "Cache-Control", `max-age= s-maxage=`);
  }
});

Answer 2

I'll figure it out myself. Adding the following code to nuxt.config.js will append cache controls to static files. thank you for your support!

export default defineNuxtConfig({
  nitro: {
    routeRules: {
      "/img/**": { headers: { 'cache-control': `public,max-age=${year},s-maxage=${year}` } },
      "/_nuxt/**": { headers: { 'cache-control': `public,max-age=${year},s-maxage=${year}` } },
    }
  }
})