somber folio
I am using next version 14 and I am trying to get access to path parameters in my middleware.
Here is example
if (request.nextUrl.pathname.startsWith("/my-voyage/2/ideation/")) {
const cookie = request.cookies.get("access_token");
if (!cookie) {
return NextResponse.rewrite(
new URL("/my-voyage/2/ideation", request.url)
);
}
}
The 2 is hardcoded here. How can I get that dynamically
somber mirageBOT
Hi @somber folio. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:
Based on the information provided in the extracts, you can access the path parameters in your middleware by using the request.nextUrl.pathname property. However, to extract specific parts of the pathname dynamically, you would need to use JavaScript string methods or regular expressions.
Unfortunately, the extracts do not provide a specific example of how to do this. However, you can use the split() method to split the pathname into an array of strings, and then access the specific part of the pathname that you need.
Here's a general example:
if (request.nextUrl.pathname.startsWith("/my-voyage/")) {
const parts = request.nextUrl.pathname.split('/');
const id = parts[2]; // This will give you the '2' in your example
const cookie = request.cookies.get("access_token");
if (!cookie) {
return NextResponse.rewrite(
new URL(`/my-voyage/${id}/ideation`, request.url)
);
}
}
@somber mirage what is the difference between redirect and rewrite
somber mirageBOT
Let me check the knowledge base for you. One moment! :books:
In Next.js, both redirect and rewrite are used to change the path of a request, but they work in different ways:
Redirect: This is used to redirect from a page to a relative or absolute URL. When a redirect is used, the URL in the browser's address bar changes to the new destination URL. There are two types of redirects: temporary (307) and permanent (308). When these functions are used while streaming UI, they will insert a meta tag to emit the redirect on the client side. source (https://nextjs.org/docs/app#how-can-i-redirect-from-a-server-component)
Rewrite: This is used to map an incoming request path to a different destination path. Unlike redirects, rewrites act as a URL proxy and mask the destination path, making it appear the user hasn't changed their location on the site. The URL in the browser's address bar does not change. Rewrites are applied to client-side routing and can be used to route to external URLs as well. source (https://nextjs.org/docs/app/api-reference/next-config-js/rewrites)
Here's an example of how to use them in next.config.js:
module.exports = {
async rewrites() {
return [
{
source: '/about',
destination: '/',
},
];
},
async redirects() {
return [
{
source: '/about',
destination: '/',
permanent: true,
},
];
},
};
/about will be rewritten to / without changing the URL in the address bar, and a request to /about will be redirected to / with the URL in the address bar changing to /.
somber folio
@somber mirage This is my code
if (request.nextUrl.pathname.startsWith("/my-voyage/")) {
const parts = request.nextUrl.pathname.split("/");
const id = parts[2]; // This will give you the '2' in your example
const cookie = request.cookies.get("access_token");
if (!cookie) {
return NextResponse.rewrite(
new URL(`/my-voyage/${id}/ideation`, request.url)
);
}
}
When I go to http://localhost:3000/my-voyage/2/ideation/new, the logic I intended works, however the url stays that url. I want it to be http://localhost:3000/my-voyage/2/ideation
somber mirageBOT
Let me check the knowledge base for you. One moment! :books:
In your code, you're using NextResponse.rewrite(), which rewrites the URL internally without changing the URL in the browser's address bar. If you want the URL in the address bar to change, you should use NextResponse.redirect() instead.
Here's how you can modify your code:
if (request.nextUrl.pathname.startsWith("/my-voyage/")) {
const parts = request.nextUrl.pathname.split("/");
const id = parts[2]; // This will give you the '2' in your example
const cookie = request.cookies.get("access_token");
if (!cookie) {
return NextResponse.redirect(`/my-voyage/${id}/ideation`);
}
}
/my-voyage/${id}/ideation and the URL in the address bar will change to reflect this.
somber folio
@somber mirage if i use redirect i get an error saying it redirected too many times
somber mirageBOT
Let me check the knowledge base for you. One moment! :books:
The "redirected too many times" error typically occurs when there's a redirect loop. This happens when URL A redirects to URL B, but then URL B redirects back to URL A, causing an infinite loop.
In the context of Next.js and Vercel, this error can occur when using a Cloudflare proxy with Vercel. If your Cloudflare SSL/TLS configuration is set to "Flexible", Cloudflare will send requests from their servers to your Vercel deployment using HTTP instead of HTTPS. Since Vercel will automatically upgrade all HTTP requests to use SSL when a certificate is present, a 308 status code is sent to the client, causing a redirect to the same location, and potentially creating a loop. source (https://vercel.com/guides/resolve-err-too-many-redirects-when-using-cloudflare-proxy-with-vercel)
To resolve this issue, you need to ensure that your redirects do not create a loop. Check your redirect rules and make sure that the source and destination do not redirect to each other.
If you're using Cloudflare, you may need to adjust your SSL/TLS configuration to prevent the issue.
somber folio
@somber mirage how can i get path parameter in a server component
somber mirageBOT
Let me check the knowledge base for you. One moment! :books:
In Next.js, you can access path parameters in server components using the params prop. This is available in dynamic pages, where the file name (or folder name) is wrapped in square brackets ([]).
Here's an example of how you can use it:
// pages/post/[id].tsx
export default function Post({ params }) {
const { id } = params;
// Now you can use `id` in your component
return <div>Post: {id}</div>;
}
In this example, if you navigate to /post/123, the Post component will render "Post: 123".
However, please note that according to the extracted information (https://github.com/vercel/next.js/issues/46618), there isn't an easy way to access the information in all server components similar to usePathname in client components. The params prop is only available in the page component that corresponds to the dynamic route.