export interface FetchResult {
    finalUrl: string;
    content: string;
    status: number;
    contentType: string | null;
    headers: Record<string, string>;
}
/**
 * Fetches a URL with timeout, redirect handling, and basic error management.
 *
 * @param urlString - The URL to fetch.
 * @param abortSignal - Optional AbortSignal to cancel the fetch.
 * @returns A promise resolving to FetchResult or null if fetch failed/aborted.
 */
export declare function fetchUrl(urlString: string, abortSignal?: AbortSignal): Promise<FetchResult | null>;
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