/// <reference types="node" />
import { AgentOptions } from "https";
import Config from "../config";
import ClientInterface from "./clientInterface";
import { IRequest } from "../typings/requestOptions";
declare class HttpURLConnectionClient implements ClientInterface {
    private static CHARSET;
    proxy?: AgentOptions;
    private agentOptions;
    /**
     * Sends an HTTP request to the specified endpoint with the provided JSON payload and configuration.
     *
     * This method sets up request headers, including authentication (API key or basic auth), content type,
     * and timeout. If a certificate path is provided in the config, it installs a certificate verifier.
     * Throws an ApiException when an error occurs (invalid API key, API error response, etc.).
     *
     * @param endpoint - The URL to which the request will be sent.
     * @param json - The JSON string to be sent as the request body.
     * @param config - The configuration object containing authentication, timeout, and certificate details.
     * @param isApiRequired - Indicates whether an API key is required for this request.
     * @param requestOptions - Additional options for the HTTP request, such as headers and timeout.
     * @returns A promise that resolves with the response body as a string.
     * @throws {ApiException} when an error occurs
     */
    request(endpoint: string, json: string, config: Config, isApiRequired: boolean, requestOptions: IRequest.Options): Promise<string>;
    private createRequest;
    /**
     * Invoke the request
     * @param connectionRequest The request
     * @param json The payload
     * @param allowRedirect Whether to allow redirect upon 308 response status code
     * @returns Promise with the API response
     */
    private doRequest;
    private installCertificateVerifier;
    private verifyLocation;
}
export default HttpURLConnectionClient;