import { Server } from "http";
/**
 * Starts an HTTP server on the specified port using Node's built-in `http` module.
 * All incoming requests are delegated to the custom `handleRequest` router.
 *
 * @param port - The port number on which the server should listen.
 * @param options - Optional configuration including cleanup callback
 */
export declare function serve(port: number, options?: {
    onShutdown?: () => Promise<void>;
}): void;
/**
 * Sets up graceful shutdown handling for the provided HTTP server.
 * Ensures that the server stops accepting new connections and waits for active requests to finish before exiting.
 * Optionally, a timeout can be specified to force shutdown if requests do not complete in time.
 *
 * @param server - The HTTP server instance to manage.
 * @param opts - Optional configuration for shutdown behavior.
 * @param opts.timeoutMs - Maximum time in milliseconds to wait for active requests before forcing shutdown (default: 10000ms).
 * @param opts.onShutdown - Optional cleanup callback to run before shutdown (e.g., close database connections, clear caches)
 */
export declare function setupGracefulShutdown(server: Server, opts?: {
    timeoutMs?: number;
    onShutdown?: () => Promise<void>;
}): void;
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