import { IChassisFeature, IOperation, IChassisContext } from "../interfaces";
import { Handler } from "express-serve-static-core";
/**
 * HTTP Reverse Proxy
 * ------------------
 * Attach a remote endpoint to an OpenAPI resource
 * The implementation of a HTTP Proxy plugin using the node-http-proxy package.
 *
 * See https://github.com/nodejitsu/node-http-proxy
 *
 * TODO: integrate with Vault to retrieve secrets and inject into egress request via header/params/etc.
 *
 */
export default class proxy implements IChassisFeature {
    name: string;
    title: string;
    proxyServer: any;
    constructor();
    /**
     * plugin to proxy requests to a remote HTTP endpoint
     *
     * @param context
     * @param options
     * @returns {TargetEndpoint}
     */
    fn(operation: IOperation, _options: any): Function;
    /**
     * Create express middleware that forwards a request to a remote endpoint
     *
     * @param context
     * @param options
     * @param proxyPath
     * @returns {Function}
     * @constructor
     */
    proxy_middleware: (context: IChassisContext, _options: any, oper: IOperation) => Handler;
    _target_options(options: any): any;
    /**
     * If enabled, copy the incoming JWT to the proxy request.
     * Otherwise, ensure the JWT is removed.
     *
     * @param context
     * @param options
     * @param req
     * @param proxyReq
     */
    reuseJWT: (context: IChassisContext, options: any, req: any, proxyReq: any) => void;
    useCredentials(_context: IChassisContext, _options: any, _req: any, proxyReq: any): boolean;
    respond(contentType: string, proxyReq: any, req: any): void;
}