bun-routes/dist/middleware.js

Bun Routes is a lightweight, type-safe router built for Bun with zero dependencies

export function middleware(fn) {
    return fn;
}
export function composeMiddlewares(middlewares, finalHandler) {
    return async (req, server) => {
        const execute = async (middlewareIndex) => {
            if (middlewareIndex >= middlewares.length) {
                return finalHandler(req, server);
            }
            let hasNextBeenCalled = false;
            const middleware = middlewares[middlewareIndex];
            const next = async () => {
                if (hasNextBeenCalled) {
                    throw new Error("next() called multiple times");
                }
                hasNextBeenCalled = true;
                return execute(middlewareIndex + 1);
            };
            return middleware(req, server, next);
        };
        return execute(0);
    };
}