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Invalidate Cache

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B33fb0n3 posted this in #help-forum
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B33fb0n3OP
Why is an cache invalid, when there are two different components and in one the data is cached and in the other component there will be the host retrieved?
I have a checkredirect components:
import {headers} from "next/headers";

export default function CheckRedirect() {
    const host = headers().get('host');
    console.log("Host: "+ host);

    return (
        <>

        </>
    )
}


That is imported in my layout.js:
            <body className={inter.className}>
                <CheckRedirect />
                <GlobalProvider>
                    {children}
                </GlobalProvider>
            </body>

The page (children) itself have a getTodoList function which is cached:
export const revalidate = 120;

export const getTodoList = cache(async () => {
    console.log("TodoListFetchCalled")
    const {data} = await API.graphql({query: listTodos});
    return data;
})

export default async function Homepage() {
    const data = await getTodoList();

    return (
        <div className={"flex px-6 py-6 w-full"}>
            <TodoList data={data.listTodos.items}/>
        </div>
    )
}

Yes the cache works, when I don't have CheckRedirect. But when I have the CheckRedirect, it renders all the time and not after 120 revalidation time. Why and how can I resolve this issue?
Answered by fuma & joulev pray for Schneider
You can handle your redirect logic in [middleware](https://nextjs.org/docs/app/building-your-application/routing/middleware), which has a better performance.
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3 Replies

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fuma & joulev pray for Schneider
Using dynamic functions like headers will opt your page into dynamic rendering, which renders everything when the user opens your page.
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fuma & joulev pray for Schneider
You can handle your redirect logic in [middleware](https://nextjs.org/docs/app/building-your-application/routing/middleware), which has a better performance.
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B33fb0n3OP
ah that looks good, thanks 👍