/**
 * Shared NO_PROXY utility functions
 * Extracted from awsProxyIntegration.ts and proxyFetch.ts to eliminate duplication
 * Supports comprehensive NO_PROXY pattern matching including wildcards, domains, ports, and CIDR
 */
/**
 * NO_PROXY bypass check. The value is a comma- or space-separated list; each
 * entry is matched case-insensitively.
 *
 * Supported entries:
 * - "*" - bypass all requests
 * - "example.com", ".example.com", "*.example.com" - the host and any subdomain
 * - "example.com:8443" - the same, on that port only; a URL without a port is
 *   on the scheme's default (80 for http, 443 for https)
 * - "example.com." - the same as "example.com": one trailing dot is ignored on
 *   an entry and on the URL's host name, so "https://api.example.com./" matches
 * - "192.168.1.10", "::1", "[::1]:8080" - an IP literal, exactly
 * - "192.168.1.0/24" - an IPv4 CIDR range, for IPv4 literal targets (IPv6 CIDR
 *   ranges are not supported)
 * - "." and ".." - an entry made only of dots names no host, so it matches
 *   nothing, as in curl
 *
 * @param targetUrl - The URL to check for proxy bypass
 * @param noProxyEnv - Optional NO_PROXY environment variable value (if not provided, reads from process.env)
 * @returns true if the URL should bypass proxy, false otherwise
 */
export declare function shouldBypassProxy(targetUrl: string, noProxyEnv?: string): boolean;
/**
 * Get the current NO_PROXY environment variable value
 * Checks both uppercase and lowercase variants
 */
export declare function getNoProxyEnv(): string | undefined;
/**
 * Simple NO_PROXY bypass check with basic pattern support
 * Legacy function for backward compatibility with simpler use cases
 *
 * Supports:
 * - "*" - bypass all
 * - "example.com" - exact match
 * - ".example.com" - domain suffix match
 *
 * An entry made only of dots names no host and matches nothing.
 *
 * @param targetUrl - The URL to check
 * @param noProxyValue - The NO_PROXY value to check against
 * @returns true if should bypass proxy
 */
export declare function shouldBypassProxySimple(targetUrl: string, noProxyValue: string): boolean;