What is the best way to access query string parameters within NextJS middleware?

Question

What is the best way to access query string parameters within NextJS middleware?

In the context of NextJS middleware, I have successfully obtained the nextUrl object from the request, which includes details like the pathname. However, I am now wondering how to extract query string parameters directly within the middleware. Although I could manually parse the string returned by href, I would like to know if these parameters are available in a separate object.

For example:

export const middleware = (request) => {
  const { nextUrl: { query } } = request;
  ...
};

Assuming query contains:

{
  param1: 'foo',
  param2: 'bar',
  etc.
}

javascript next.js middleware

Answer 1

Answer №1

nextUrl object already contains searchParams, which is a valid instance of URLSearchParams.

An example of how to use it:

export function middleware(req: NextRequest) {
    if(req.nextUrl.searchParams.get('flag')) {
        return NextResponse.rewrite('/feature');
    }
}

Answer 2

nextUrl object already contains searchParams, which is a valid instance of URLSearchParams.

An example of how to use it:

export function middleware(req: NextRequest) {
    if(req.nextUrl.searchParams.get('flag')) {
        return NextResponse.rewrite('/feature');
    }
}

Answer 3

Answer №2

Building on @j-cue's insight, I also made the discovery that you can extract the search data from the nextUrl.

For instance:

export const middleware = (request) => {
  const { nextUrl: { search } } = request;
  const urlSearchParams = new URLSearchParams(search);
  const params = Object.fromEntries(urlSearchParams.entries());
};

Answer 4

Building on @j-cue's insight, I also made the discovery that you can extract the search data from the nextUrl.

For instance:

export const middleware = (request) => {
  const { nextUrl: { search } } = request;
  const urlSearchParams = new URLSearchParams(search);
  const params = Object.fromEntries(urlSearchParams.entries());
};

Answer 5

Answer №3

Starting from version 13.4 of Next.js, you are able to extract search parameters directly from the URL like this:

export const GET = async (request, { params }) => {
   try{
        
        // Path Params can be accessed through the {params} object
        // To extract search params, follow this example:
        // URL path: `/api/prompt/${post._id.toString()}?type=DELETE`
        // The search params [type, method] for the above URL

        const {type, method} = Object.fromEntries(request.nextUrl.searchParams);
        console.log(type, method);
        if(type === "DELETE" && method === "GET"){
            // Perform certain action based on the parameters
        }

        return new Response("Action performed", {status: 200});
   }
   catch(err){
    console.log(err);
   }
}

Answer 6

Starting from version 13.4 of Next.js, you are able to extract search parameters directly from the URL like this:

export const GET = async (request, { params }) => {
   try{
        
        // Path Params can be accessed through the {params} object
        // To extract search params, follow this example:
        // URL path: `/api/prompt/${post._id.toString()}?type=DELETE`
        // The search params [type, method] for the above URL

        const {type, method} = Object.fromEntries(request.nextUrl.searchParams);
        console.log(type, method);
        if(type === "DELETE" && method === "GET"){
            // Perform certain action based on the parameters
        }

        return new Response("Action performed", {status: 200});
   }
   catch(err){
    console.log(err);
   }
}

Answer 7

Answer №4

If you're looking to retrieve it from a specific source, consider using this method:

let searchParams = new URLSearchParams(window.location.search);
let queryParams = Object.fromEntries(searchParams.entries());

Answer 8

If you're looking to retrieve it from a specific source, consider using this method:

let searchParams = new URLSearchParams(window.location.search);
let queryParams = Object.fromEntries(searchParams.entries());

What is the best way to access query string parameters within NextJS middleware?

Answer №1

Answer №2

Answer №3

Answer №4

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