import type { ParsedParams, ParsedQuery } from '../types/http.types.js';
export declare function query(req: Request, name?: string): string | string[] | ParsedQuery | undefined;
export declare function params(req: Request, routeParams?: ParsedParams, name?: string): string | ParsedParams | undefined;
export declare function body<T = unknown>(req: Request): Promise<T>;
/**
 * Reads merged input from query string and request body.
 * When a key is provided, returns that value (query takes precedence, then body, then fallback).
 * When no key is provided, returns the full merged input object.
 */
export declare function input(req: Request, key?: string, fallback?: unknown): Promise<unknown>;
/** Returns the value of a named request header, or `fallback` if absent. */
export declare function header(req: Request, name: string, fallback?: string): string | undefined;
/**
 * Extracts the Bearer token from the Authorization header.
 * Returns `null` if the header is absent or uses a different scheme.
 */
export declare function bearerToken(req: Request): string | null;
/** Returns `true` if the client signals it accepts a JSON response (via Accept header). */
export declare function wantsJson(req: Request): boolean;
/** Returns `true` if the request body is JSON (via Content-Type header). */
export declare function expectsJson(req: Request): boolean;
/** Returns the full URL string of the request. */
export declare function fullUrl(req: Request): string;
/**
 * Returns the full URL with the given query parameters merged in.
 * Existing params with the same key are overwritten.
 */
export declare function fullUrlWithQuery(req: Request, patch: Record<string, string>): string;
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