/**
 * Static file server with streaming, ETags, and directory listing
 */
import type { IStaticOptions } from '../core/smartserve.interfaces.js';
/**
 * Static file server
 */
export declare class FileServer {
    private options;
    constructor(options: IStaticOptions | string);
    /**
     * Handle a request for static files
     */
    serve(request: Request): Promise<Response | null>;
    /**
     * Serve a single file with proper headers
     */
    private serveFile;
    /**
     * Serve partial content (Range request)
     */
    private servePartial;
    /**
     * Serve directory listing
     */
    private serveDirectory;
    /**
     * Generate default directory listing HTML
     */
    private generateDirectoryHtml;
    /**
     * Find pre-compressed variant of a file if it exists
     * Checks for .br and .gz variants based on client Accept-Encoding
     */
    private findPrecompressedVariant;
    /**
     * Convert Node.js stream to Web ReadableStream
     */
    private nodeStreamToWebStream;
}