headers is an async function that allows you to read the HTTP incoming request headers from a Server Component.
import { headers } from 'next/headers'
export default async function Page() {
const headersList = await headers()
const userAgent = headersList.get('user-agent')
}headers does not take any parameters.
headers returns a read-only Web Headers object.
Headers.entries() : Returns an iterator allowing to go through all key/value pairs contained in this object.Headers.forEach() : Executes a provided function once for each key/value pair in this Headers object.Headers.get() : Returns a String sequence of all the values of a header within a Headers object with a given name.Headers.has() : Returns a boolean stating whether a Headers object contains a certain header.Headers.keys() : Returns an iterator allowing you to go through all keys of the key/value pairs contained in this object.Headers.values() : Returns an iterator allowing you to go through all values of the key/value pairs contained in this object.headers is an asynchronous function that returns a promise. You must use async/await or React's use function.
headers was a synchronous function. To help with backwards compatibility, you can still access it synchronously in Next.js 15, but this behavior will be deprecated in the future.headers is read-only, you cannot set or delete the outgoing request headers.headers is a Dynamic API whose returned values cannot be known ahead of time. Using it in will opt a route into dynamic rendering.import { headers } from 'next/headers'
export default async function Page() {
const authorization = (await headers()).get('authorization')
const res = await fetch('...', {
headers: { authorization }, // Forward the authorization header
})
const user = await res.json()
return <h1>{user.name}</h1>
}v15.0.0-RC headers is now an async function. A codemod is available. v13.0.0 headers introduced.
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