export interface ContentTypeInfo {
    mime: string;
    isHtml: boolean;
    isImage: boolean;
    isPdf: boolean;
    isText: boolean;
    isJson: boolean;
    isSvg: boolean;
    isBinary: boolean;
}
/**
 * Detect MIME type by inspecting magic bytes at the start of a binary buffer.
 *
 * Checks known signatures (PNG, JPEG, GIF, BMP, WebP, PDF) and returns the
 * MIME type string on match, or `null` if nothing matches.
 *
 * @param buffer — The raw bytes to inspect (at least the first 12 bytes).
 * @returns The detected MIME type string, or `null`.
 */
export declare function detectMimeByMagic(buffer: Uint8Array): string | null;
/**
 * Detect content type by combining the HTTP Content-Type header with magic
 * byte analysis of the response body. Returns a structured `ContentTypeInfo`
 * with convenience boolean flags.
 *
 * Strategy:
 * 1. Magic bytes take precedence when they detect a known format, overriding
 *    the header for generic/mismatched types.
 * 2. If the Content-Type header provides a specific, non-generic MIME, trust it
 *    (unless magic bytes detected something of a different category).
 * 3. If neither source yields a result, default to `application/octet-stream`.
 *
 * @param contentTypeHeader — The value of the Content-Type response header (or null).
 * @param bodyStart — The first few bytes of the response body (≥12 bytes preferred).
 * @returns A ContentTypeInfo record with the resolved MIME and boolean flags.
 */
export declare function detectContentType(contentTypeHeader: string | null, bodyStart: Uint8Array): ContentTypeInfo;
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