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import { Observable } from 'rxjs/Observable';
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import { HttpBackend } from './backend';
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import { HttpRequest } from './request';
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import { HttpEvent } from './response';
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/**
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* A wrapper around the `XMLHttpRequest` constructor.
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*
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* @experimental
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*/
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export declare abstract class XhrFactory {
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abstract build(): XMLHttpRequest;
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}
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/**
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* A factory for @{link HttpXhrBackend} that uses the `XMLHttpRequest` browser API.
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*
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* @experimental
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*/
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export declare class BrowserXhr implements XhrFactory {
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constructor();
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build(): any;
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}
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/**
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* An `HttpBackend` which uses the XMLHttpRequest API to send
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* requests to a backend server.
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*
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* @experimental
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*/
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export declare class HttpXhrBackend implements HttpBackend {
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private xhrFactory;
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constructor(xhrFactory: XhrFactory);
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/**
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* Process a request and return a stream of response events.
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*/
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handle(req: HttpRequest<any>): Observable<HttpEvent<any>>;
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}
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