import type { EventEmitter } from "node:events";
type ErrorEventEmitter = Pick<EventEmitter, "on"> & object;
export declare function attachGatewaySocketErrorSink(socket: ErrorEventEmitter | null | undefined, onError?: (error: unknown) => void): void;
/**
 * When an app returns a redirect to a root-relative path that doesn't already
 * include the app prefix, prepend it. This handles the common case where a
 * framework server-side redirect uses a plain path like "/" or "/login"
 * without knowing it's mounted at "/{appId}" by the gateway.
 *
 * Only rewrites path-only locations (starting with "/") to avoid touching
 * absolute URLs (e.g. redirects to Google OAuth or external sites).
 */
export declare function rewriteRedirectLocation(app: {
    id: string;
}, location: string | undefined): string | undefined;
export declare function normalizeOrigin(value: string | undefined): string | undefined;
export declare function escapeHtml(value: string): string;
export {};
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