D-Net

/**

 * @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/Observable';

import { HttpRequest } from './request';

import { HttpEvent } from './response';

/**

 * Transforms an `HttpRequest` into a stream of `HttpEvent`s, one of which will likely be a

 * `HttpResponse`.

 *

 * `HttpHandler` is injectable. When injected, the handler instance dispatches requests to the

 * first interceptor in the chain, which dispatches to the second, etc, eventually reaching the

 * `HttpBackend`.

 *

 * In an `HttpInterceptor`, the `HttpHandler` parameter is the next interceptor in the chain.

 *

 * @experimental

 */

export declare abstract class HttpHandler {

    abstract handle(req: HttpRequest<any>): Observable<HttpEvent<any>>;

}

/**

 * A final `HttpHandler` which will dispatch the request via browser HTTP APIs to a backend.

 *

 * Interceptors sit between the `HttpClient` interface and the `HttpBackend`.

 *

 * When injected, `HttpBackend` dispatches requests directly to the backend, without going

 * through the interceptor chain.

 *

 * @experimental

 */

export declare abstract class HttpBackend implements HttpHandler {

    abstract handle(req: HttpRequest<any>): Observable<HttpEvent<any>>;

}