import { HList, HRef } from 'haystack-core';
/**
 * @module HTTP utility methods.
 */
/**
 * Returns the URL for an general API.
 *
 * @param params.origin The origin.
 * @param params.path The path prefix to use.
 * @returns A URL.
 */
export declare const getServiceUrl: getServiceUrlCallback;
/**
 * The functional interface for getting the origin API url.
 */
export interface getServiceUrlCallback {
    ({ origin, path }: {
        origin: string;
        path: string;
    }): string;
}
/**
 * The functional interface for getting the op url.
 */
export interface getOpUrlCallback {
    ({ origin, pathPrefix, project, op, }: {
        origin: string;
        pathPrefix: string;
        project: string;
        op: string;
    }): string;
}
/**
 * Returns the URL for an op.
 *
 * @param params.origin The origin.
 * @param params.pathPrefix The path prefix to use.
 * @param params.project The project name.
 * @param params.op The op name.
 * @returns A URL.
 */
export declare const getOpUrl: getOpUrlCallback;
/**
 * The functional interface for getting the op url.
 */
export interface getHaystackServiceUrlCallback {
    ({ origin, pathPrefix, project, path, }: {
        origin: string;
        pathPrefix: string;
        project: string;
        path: string;
    }): string;
}
/**
 * Returns the URL for a Haystack REST service.
 *
 * @param origin The origin for the service.
 * @param pathPrefix The path prefix to use.
 * @param project The project for the service. May be empty and if so shouldn't be included.
 * @param path The service path.
 * @returns A URL.
 */
export declare const getHaystackServiceUrl: getHaystackServiceUrlCallback;
/**
 * The functional interface for getting the op url.
 */
export interface getHostServiceUrlCallback {
    ({ origin, pathPrefix, path, }: {
        origin: string;
        pathPrefix: string;
        path: string;
    }): string;
}
/**
 * Returns the URL for a Host REST service.
 *
 * @param origin The origin for the service.
 * @param pathPrefix The path prefix to use.
 * @param path The service path.
 * @returns A URL.
 */
export declare const getHostServiceUrl: getHostServiceUrlCallback;
/**
 * Encode the object as a URI query segment.
 *
 * https://en.wikipedia.org/wiki/Uniform_Resource_Identifier
 *
 * @param obj The object to encode.
 * @returns A query or empty string if there's noting to encode.
 */
export declare function encodeQuery(obj: Record<string, string | HRef | number | string[] | HRef[] | HList<HRef> | boolean | undefined>): string;
/**
 * The CSRF key that needs to be added to all outgoing writable requests.
 */
export declare const SKYARC_ATTEST_KEY = "skyarc-attest-key";
/**
 * The FIN authorization key that contains a requested CSRF key.
 */
export declare const FIN_AUTH_KEY = "fin-stack-auth";
/**
 * The FIN authorization path to request a CSRF token.
 */
export declare const FIN_AUTH_PATH = "/finStackAuth";
/**
 * The HTTP accept header.
 */
export declare const ACCEPT_HEADER = "accept";
/**
 * The HTTP content type header.
 */
export declare const CONTENT_TYPE_HEADER = "content-type";
/**
 * The zinc mime type.
 */
export declare const ZINC_MIME_TYPE = "text/zinc";
/**
 * Return the origin for the specified resource.
 *
 * If the path is relative then an empty string is returned.
 *
 * @param resource The resouce to get the host from.
 * @returns The host.
 */
export declare function getOrigin(resource: string): string;
/**
 * An object literal for http headers.
 */
export interface HeadersObj {
    [prop: string]: string;
}
/**
 * Return true if the headers object has the specified header.
 *
 * @param headers The headers object.
 * @param headerName The header name to look for.
 * @returns True if the header is present.
 */
export declare function hasHeader(headers: HeadersInit | undefined, headerName: string): boolean;
/**
 * Return the header value from the headers object. Return undefined if the
 * value can't be found.
 *
 * @param headers The headers object.
 * @param headerName The headers name to look for.
 * @returns The header value as a string or undefined if it can't be found.
 */
export declare function getHeader(headers: HeadersInit | undefined, headerName: string): string | undefined;
/**
 * Add the header and its value to an options object.
 *
 * @param options The options object that has a headers object.
 * @param headerName The header name.
 * @param headerValue The header value.
 */
export declare function addHeader(options: RequestInit, headerName: string, headerValue: string): void;
/**
 * Remove the header value from the headers object by name.
 *
 * @param headers The headers object.
 * @param headerName The headers name to look for.
 * @returns The headers object
 */
export declare function removeHeader(headers: HeadersInit | undefined, headerName: string): HeadersInit | undefined;
/**
 * Adds a starting slash and removes any ending slash.
 *
 * @param path The path to update.
 * @returns The updated path.
 */
export declare function addStartSlashRemoveEndSlash(path: string): string;