export declare enum MimeTypes {
    html = "text/html",
    plaintext = "text/plain",
    json = "application/json",
    ico = "image/vnd.microsoft.icon",
    octetStream = "application/octet-stream"
}
export declare const default_security_headers: Record<string, string>;
export interface PreResponse {
    status?: number;
    body: string | ReadableStream | ArrayBuffer;
    mime_type: MimeTypes | string;
    headers?: Record<string, string>;
}
export declare function json_response(obj: Record<string, any>, status?: number): PreResponse;
export declare class HttpError extends Error {
    status: number;
    body: string;
    headers: Record<string, string>;
    constructor(status: number, body: string, headers?: Record<string, string> | undefined);
    response(request: Request): PreResponse;
}
export declare class Redirect extends HttpError {
    constructor(location: string, status?: 301 | 302 | 303 | 307 | 308, body?: string | null);
}