Using a Server Component (not a route handler) in the app router, is it possible to get the headers?
I'm trying to get the "cookie" header, however it just says undefined.
#Is it possible to use headers in server component
foggy orchid
feral fieldBOT
Hi @foggy orchid. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:
Yes, it is possible to access headers in a Server Component in Next.js. You can use the headers function from next/headers to retrieve request headers. Here's how you can do it:
import { headers } from 'next/headers'
export default function Page() {
const headersList = headers();
const cookie = headersList.get('cookie');
return '...'
}
However, please note that the headers().get(name) method returns undefined if a header with name isn't found. If the "cookie" header is not set or is empty, it will return undefined.
Also, keep in mind that the headers function is a Dynamic Function (https://nextjs.org/docs/app/building-your-application/rendering/server-components#server-rendering-strategies#dynamic-functions) whose returned values cannot be known ahead of time. Using it in a layout or page will opt a route into dynamic rendering (https://nextjs.org/docs/app/building-your-application/rendering/server-components#dynamic-rendering) at request time.
For more information, you can refer to the Next.js documentation on headers (https://nextjs.org/docs/app/api-reference/functions/headers).
Sources:
- Next.js documentation on headers (https://nextjs.org/docs/app/api-reference/functions/headers)
- Github Issue: How To Access Req/Headers/Cookie In Server Components (https://github.com/vercel/next.js/issues/48092)