/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { XMLHttpRequest } from 'xhr2-cookies';
import { Provider } from 'injection-js';
import { BrowserXhr, Connection, ConnectionBackend, Http, ReadyState, Request, RequestOptions, Response, XHRBackend, XSRFStrategy } from './http/index';
import { HttpEvent, HttpRequest, HttpInterceptor, HttpBackend } from './common-http';
import { Observable } from 'rxjs/Observable';
export declare class ServerXhr implements BrowserXhr {
    build(): XMLHttpRequest;
}
export declare class ServerXsrfStrategy implements XSRFStrategy {
    configureRequest(req: Request): void;
}
export declare abstract class ZoneMacroTaskWrapper<S, R> {
    wrap(request: S): Observable<R>;
    protected abstract delegate(request: S): Observable<R>;
}
export declare class ZoneMacroTaskConnection extends ZoneMacroTaskWrapper<Request, Response> implements Connection {
    request: Request;
    private backend;
    response: Observable<Response>;
    lastConnection: Connection;
    constructor(request: Request, backend: XHRBackend);
    delegate(request: Request): Observable<Response>;
    readonly readyState: ReadyState;
}
export declare class ZoneMacroTaskBackend implements ConnectionBackend {
    private backend;
    constructor(backend: XHRBackend);
    createConnection(request: any): ZoneMacroTaskConnection;
}
export declare class ZoneClientBackend extends ZoneMacroTaskWrapper<HttpRequest<any>, HttpEvent<any>> implements HttpBackend {
    private backend;
    constructor(backend: HttpBackend);
    handle(request: HttpRequest<any>): Observable<HttpEvent<any>>;
    protected delegate(request: HttpRequest<any>): Observable<HttpEvent<any>>;
}
export declare function httpFactory(xhrBackend: XHRBackend, options: RequestOptions): Http;
export declare function zoneWrappedInterceptingHandler(backend: HttpBackend, interceptors: HttpInterceptor[] | null): ZoneClientBackend;
export declare const SERVER_HTTP_PROVIDERS: Provider[];