import type { HttpRequest, ParsedRequest } from './types.js';
export declare function stripLeadingSlash(s: string): string;
/**
 * Lift a single request header into an S3 command param.
 * Returns `{ [paramKey]: value }` or `{}` so it spreads cleanly
 * into a command input object.
 */
export declare function mapHeaderToParam(req: HttpRequest, headerKey: string, paramKey: string): Record<string, string> | Record<string, never>;
/**
 * Extract `key` (S3 object key, no leading slash, decoded) and `query`
 * from an HTTP request. Different frameworks (Express, Fastify) and
 * the raw `http` module expose path/query differently, so we accept
 * both `req.path/req.query` and the raw `req.url`.
 *
 * Throws `InvalidRequest` for malformed percent-encoding or a null
 * byte in the decoded key (S3 rejects these and the surface area is
 * worth guarding against at the boundary).
 */
export declare function parseRequest(req: HttpRequest): ParsedRequest;
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