/**
 * @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 { Observable } from 'rxjs';
import { ResponseOptions } from '../base_response_options';
import { ReadyState } from '../enums';
import { Connection, ConnectionBackend, XSRFStrategy } from '../interfaces';
import { Request } from '../static_request';
import { Response } from '../static_response';
import { BrowserXhr } from './browser_xhr';
/**
 * Creates connections using `XMLHttpRequest`. Given a fully-qualified
 * request, an `XHRConnection` will immediately create an `XMLHttpRequest` object and send the
 * request.
 *
 * This class would typically not be created or interacted with directly inside applications, though
 * the {@link MockConnection} may be interacted with in tests.
 *
 * @deprecated see https://angular.io/guide/http
 * @publicApi
 */
export declare class XHRConnection implements Connection {
    request: Request;
    /**
     * Response {@link EventEmitter} which emits a single {@link Response} value on load event of
     * `XMLHttpRequest`.
     */
    response: Observable<Response>;
    readyState: ReadyState;
    constructor(req: Request, browserXHR: BrowserXhr, baseResponseOptions?: ResponseOptions);
    setDetectedContentType(req: any /** TODO Request */, _xhr: any /** XMLHttpRequest */): void;
}
/**
 * `XSRFConfiguration` sets up Cross Site Request Forgery (XSRF) protection for the application
 * using a cookie. See https://www.owasp.org/index.php/Cross-Site_Request_Forgery_(CSRF)
 * for more information on XSRF.
 *
 * Applications can configure custom cookie and header names by binding an instance of this class
 * with different `cookieName` and `headerName` values. See the main HTTP documentation for more
 * details.
 *
 * @deprecated see https://angular.io/guide/http
 * @publicApi
 */
export declare class CookieXSRFStrategy implements XSRFStrategy {
    private _cookieName;
    private _headerName;
    constructor(_cookieName?: string, _headerName?: string);
    configureRequest(req: Request): void;
}
/**
 * Creates {@link XHRConnection} instances.
 *
 * This class would typically not be used by end users, but could be
 * overridden if a different backend implementation should be used,
 * such as in a node backend.
 *
 * @usageNotes
 * ### Example
 *
 * ```
 * import {Http, MyNodeBackend, HTTP_PROVIDERS, BaseRequestOptions} from '@angular/http';
 * @Component({
 *   viewProviders: [
 *     HTTP_PROVIDERS,
 *     {provide: Http, useFactory: (backend, options) => {
 *       return new Http(backend, options);
 *     }, deps: [MyNodeBackend, BaseRequestOptions]}]
 * })
 * class MyComponent {
 *   constructor(http:Http) {
 *     http.request('people.json').subscribe(res => this.people = res.json());
 *   }
 * }
 * ```
 * @deprecated see https://angular.io/guide/http
 * @publicApi
 */
export declare class XHRBackend implements ConnectionBackend {
    private _browserXHR;
    private _baseResponseOptions;
    private _xsrfStrategy;
    constructor(_browserXHR: BrowserXhr, _baseResponseOptions: ResponseOptions, _xsrfStrategy: XSRFStrategy);
    createConnection(request: Request): XHRConnection;
}