/*!
 * content-disposition
 * Copyright(c) 2014-2017 Douglas Christopher Wilson
 * MIT Licensed
 */
export interface ContentDisposition {
    /**
     * Content-Disposition type, such as "attachment" or "inline"
     */
    type: string;
    /**
     * Content-Disposition parameters, such as "filename"
     */
    parameters: Record<string, string>;
}
export interface CreateOptions {
    /**
     * Content-Disposition type, defaults to "attachment"
     * @default "attachment"
     */
    type?: string;
    /**
     * Fallback filename for non-US-ASCII strings. If true, a fallback will be generated by replacing non-US-ASCII characters with "?". If false, no fallback will be generated.
     * @default true
     */
    fallback?: string | boolean;
}
/**
 * Create an attachment Content-Disposition header.
 */
export declare function create(filename?: string, options?: CreateOptions): string;
export interface ParseOptions {
    /**
     * Whether to decode RFC 8187 encoded parameters.
     * @default true
     */
    extended?: boolean;
    /**
     * Parse parameters as sent by browsers in `multipart/form-data`.
     * @default false
     */
    multipart?: boolean;
}
/**
 * Parse Content-Disposition header string.
 */
export declare function parse(header: string, options?: ParseOptions): ContentDisposition;
/**
 * Decode a RFC 8187 field value (gracefully).
 */
export declare function decodeExtended(str: string): string | undefined;
export interface FormatOptions {
    /**
     * Whether to use extended parameter encoding for non-ISO-8859-1 strings.
     * If false, an error will be thrown when formatting such strings.
     * @default true
     */
    extended?: boolean;
    /**
     * Format parameters as sent by browsers in `multipart/form-data`.
     * @default false
     */
    multipart?: boolean;
}
/**
 * Format object to Content-Disposition header.
 */
export declare function format(obj: Partial<ContentDisposition>, options?: FormatOptions): string;
/**
 * Encode a Unicode string for HTTP (RFC 5987).
 */
export declare function encodeExtended(str: string): string;