/**
 * @license Angular v8.0.3
 * (c) 2010-2019 Google LLC. https://angular.io/
 * License: MIT
 */

import { InjectionToken } from '@angular/core';
import { Injector } from '@angular/core';
import { ModuleWithProviders } from '@angular/core';
import { Observable } from 'rxjs';

/**
 * A multi-provider token which represents the array of `HttpInterceptor`s that
 * are registered.
 *
 * @publicApi
 */
export declare const HTTP_INTERCEPTORS: InjectionToken<HttpInterceptor[]>;

/**
 * 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.
 *
 * @publicApi
 */
export declare abstract class HttpBackend implements HttpHandler {
    abstract handle(req: HttpRequest<any>): Observable<HttpEvent<any>>;
}

/**
 * Performs HTTP requests.
 *
 * `HttpClient` is available as an injectable class, with methods to perform HTTP requests.
 * Each request method has multiple signatures, and the return type varies based on
 * the signature that is called (mainly the values of `observe` and `responseType`).
 *
 *
 * @see [HTTP Guide](guide/http)
 *
 *
 * @usageNotes
 * Sample HTTP requests for the [Tour of Heroes](/tutorial/toh-pt0) application.
 *
 * ### HTTP Request Example
 *
 * ```
 *  // GET heroes whose name contains search term
 * searchHeroes(term: string): observable<Hero[]>{
 *
 *  const params = new HttpParams({fromString: 'name=term'});
 *    return this.httpClient.request('GET', this.heroesUrl, {responseType:'json', params});
 * }
 * ```
 * ### JSONP Example
 * ```
 * requestJsonp(url, callback = 'callback') {
 *  return this.httpClient.jsonp(this.heroesURL, callback);
 * }
 * ```
 *
 *
 * ### PATCH Example
 * ```
 * // PATCH one of the heroes' name
 * patchHero (id: number, heroName: string): Observable<{}> {
 * const url = `${this.heroesUrl}/${id}`;   // PATCH api/heroes/42
 *  return this.httpClient.patch(url, {name: heroName}, httpOptions)
 *    .pipe(catchError(this.handleError('patchHero')));
 * }
* ```
 *
 * @publicApi
 */
export declare class HttpClient {
    private handler;
    constructor(handler: HttpHandler);
    /**
     * Sends an `HTTPRequest` and returns a stream of `HTTPEvents`.
     *
     * @return An `Observable` of the response, with the response body as a stream of `HTTPEvents`.
     */
    request<R>(req: HttpRequest<any>): Observable<HttpEvent<R>>;
    /**
     * Constructs a request that interprets the body as an `ArrayBuffer` and returns the response in an
     * `ArrayBuffer`.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     *
     * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.
     */
    request(method: string, url: string, options: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<ArrayBuffer>;
    /**
     * Constructs a request that interprets the body as a blob and returns
     * the response as a blob.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body of type `Blob`.
     */
    request(method: string, url: string, options: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<Blob>;
    /**
     * Constructs a request that interprets the body as a text string and
     * returns a string value.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body of type string.
     */
    request(method: string, url: string, options: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<string>;
    /**
     * Constructs a request that interprets the body as an `ArrayBuffer` and returns the
     * the full event stream.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body as an array of `HTTPEvents` for the
     * request.
     */
    request(method: string, url: string, options: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        observe: 'events';
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpEvent<ArrayBuffer>>;
    /**
     * Constructs a request that interprets the body as a `Blob` and returns
     * the full event stream.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of of all `HttpEvents` for the request,
     * with the response body of type `Blob`.
     */
    request(method: string, url: string, options: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Blob>>;
    /**
     * Constructs a request which interprets the body as a text string and returns the full event stream.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of all `HttpEvents` for the reques,
     * with the response body of type string.
     */
    request(method: string, url: string, options: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpEvent<string>>;
    /**
     * Constructs a request which interprets the body as a JSON object and returns the full event stream.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the  request.
     *
     * @return An `Observable` of all `HttpEvents` for the request,
     *  with the response body of type `Object`.
     */
    request(method: string, url: string, options: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        reportProgress?: boolean;
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<any>>;
    /**
     * Constructs a request which interprets the body as a JSON object and returns the full event stream.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of all `HttpEvents` for the request,
     * with the response body of type `R`.
     */
    request<R>(method: string, url: string, options: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        reportProgress?: boolean;
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<R>>;
    /**
     * Constructs a request which interprets the body as an `ArrayBuffer`
     * and returns the full `HTTPResponse`.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse`, with the response body as an `ArrayBuffer`.
     */
    request(method: string, url: string, options: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpResponse<ArrayBuffer>>;
    /**
     * Constructs a request which interprets the body as a `Blob` and returns the full `HTTPResponse`.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse`, with the response body of type `Blob`.
     */
    request(method: string, url: string, options: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Blob>>;
    /**
     * Constructs a request which interprets the body as a text stream and returns the full `HTTPResponse`.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the HTTP response, with the response body of type string.
     */
    request(method: string, url: string, options: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpResponse<string>>;
    /**
     * Constructs a request which interprets the body as a JSON object and returns the full `HTTPResponse`.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the full `HTTPResponse`,
     * with the response body of type `Object`.
     */
    request(method: string, url: string, options: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        reportProgress?: boolean;
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Object>>;
    /**
     * Constructs a request which interprets the body as a JSON object and returns
     * the full `HTTPResponse` with the response body in the requested type.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return  An `Observable` of the full `HTTPResponse`, with the response body of type `R`.
     */
    request<R>(method: string, url: string, options: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        reportProgress?: boolean;
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<R>>;
    /**
     * Constructs a request which interprets the body as a JSON object and returns the full
     * `HTTPResponse` as a JSON object.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse`, with the response body of type `Object`.
     */
    request(method: string, url: string, options?: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        responseType?: 'json';
        reportProgress?: boolean;
        withCredentials?: boolean;
    }): Observable<Object>;
    /**
     * Constructs a request which interprets the body as a JSON object
     * with the response body of the requested type.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse`, with the response body of type `R`.
     */
    request<R>(method: string, url: string, options?: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        responseType?: 'json';
        reportProgress?: boolean;
        withCredentials?: boolean;
    }): Observable<R>;
    /**
     * Constructs a request where response type and requested observable are not known statically.
     *
     * @param method  The HTTP method.
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the reuested response, wuth body of type `any`.
     */
    request(method: string, url: string, options?: {
        body?: any;
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        observe?: HttpObserve;
        reportProgress?: boolean;
        responseType?: 'arraybuffer' | 'blob' | 'json' | 'text';
        withCredentials?: boolean;
    }): Observable<any>;
    /**
     * Constructs a `DELETE` request that interprets the body as an `ArrayBuffer`
     *  and returns the response as an `ArrayBuffer`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return  An `Observable` of the response body as an `ArrayBuffer`.
     */
    delete(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<ArrayBuffer>;
    /**
     * Constructs a `DELETE` request that interprets the body as a `Blob` and returns
     * the response as a `Blob`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response body as a `Blob`.
     */
    delete(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<Blob>;
    /**
     * Constructs a `DELETE` request that interprets the body as a text string and returns
     * a string.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body of type string.
     */
    delete(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<string>;
    /**
     * Constructs a `DELETE` request that interprets the body as an `ArrayBuffer`
     *  and returns the full event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of all `HTTPEvents` for the request,
     * with response body as an `ArrayBuffer`.
     */
    delete(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpEvent<ArrayBuffer>>;
    /**
     * Constructs a `DELETE` request that interprets the body as a `Blob`
     *  and returns the full event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of all the `HTTPEvents` for the request, with the response body as a
     * `Blob`.
     */
    delete(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Blob>>;
    /**
     * Constructs a `DELETE` request that interprets the body as a text string
     * and returns the full event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of all `HTTPEvents` for the request, with the response
     *  body of type string.
     */
    delete(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpEvent<string>>;
    /**
     * Constructs a `DELETE` request that interprets the body as a JSON object
     * and returns the full event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of all `HTTPEvents` for the request, with response body of
     * type `Object`.
     */
    delete(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Object>>;
    /**
     * Constructs a `DELETE`request that interprets the body as a JSON object
     * and returns the full event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of all the `HTTPEvents` for the request, with a response
     * body in the requested type.
     */
    delete<T>(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<T>>;
    /**
     * Constructs a `DELETE` request that interprets the body as an `ArrayBuffer` and returns
     *  the full `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the full `HTTPResponse`, with the response body as an `ArrayBuffer`.
     */
    delete(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpResponse<ArrayBuffer>>;
    /**
     * Constructs a `DELETE` request that interprets the body as a `Blob` and returns the full
     * `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse`, with the response body of type `Blob`.
     */
    delete(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Blob>>;
    /**
     * Constructs a `DELETE` request that interprets the body as a text stream and
     *  returns the full `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the full `HTTPResponse`, with the response body of type string.
     */
    delete(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpResponse<string>>;
    /**
     * Constructs a `DELETE` request the interprets the body as a JSON object and returns
     * the full `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse`, with the response body of type `Object`.
     *
     */
    delete(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Object>>;
    /**
     * Constructs a `DELETE` request that interprets the body as a JSON object
     * and returns the full `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse`, with the response body of the requested type.
     */
    delete<T>(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<T>>;
    /**
     * Constructs a `DELETE` request that interprets the body as a JSON object and
     * returns the response body as a JSON object.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body of type `Object`.
     */
    delete(url: string, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<Object>;
    /**
     * Constructs a DELETE request that interprets the body as a JSON object and returns
     * the response in a given type.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse`, with response body in the requested type.
     */
    delete<T>(url: string, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<T>;
    /**
     * Constructs a `GET` request that interprets the body as an `ArrayBuffer` and returns the response in
     *  an `ArrayBuffer`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.
     */
    get(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<ArrayBuffer>;
    /**
     * Constructs a `GET` request that interprets the body as a `Blob`
     * and returns the response as a `Blob`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body as a `Blob`.
     */
    get(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<Blob>;
    /**
     * Constructs a `GET` request that interprets the body as a text string
     * and returns the response as a string value.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body of type string.
     */
    get(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<string>;
    /**
     * Constructs a `GET` request that interprets the body as an `ArrayBuffer` and returns
     *  the full event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of all `HttpEvents` for the request, with the response
     * body as an `ArrayBuffer`.
     */
    get(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpEvent<ArrayBuffer>>;
    /**
     * Constructs a `GET` request that interprets the body as a `Blob` and
     * returns the full event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body as a `Blob`.
     */
    get(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Blob>>;
    /**
     * Constructs a `GET` request that interprets the body as a text string and returns
     * the full event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body of type string.
     */
    get(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpEvent<string>>;
    /**
     * Constructs a `GET` request that interprets the body as a JSON object
     * and returns the full event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body of type `Object`.
     */
    get(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Object>>;
    /**
     * Constructs a `GET` request that interprets the body as a JSON object and returns the full event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with a response body in the requested type.
     */
    get<T>(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<T>>;
    /**
     * Constructs a `GET` request that interprets the body as an `ArrayBuffer` and
     * returns the full `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse` for the request,
     * with the response body as an `ArrayBuffer`.
     */
    get(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpResponse<ArrayBuffer>>;
    /**
     * Constructs a `GET` request that interprets the body as a `Blob` and
     * returns the full `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse` for the request,
     *  with the response body as a `Blob`.
     */
    get(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Blob>>;
    /**
     * Constructs a `GET` request that interprets the body as a text stream and
     * returns the full `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse` for the request,
     * with the response body of type string.
     */
    get(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpResponse<string>>;
    /**
     * Constructs a `GET` request that interprets the body as a JSON object and
     * returns the full `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the full `HttpResponse`,
     * with the response body of type `Object`.
     */
    get(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Object>>;
    /**
     * Constructs a `GET` request that interprets the body as a JSON object and
     * returns the full `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the full `HTTPResponse` for the request,
     * with a response body in the requested type.
     */
    get<T>(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<T>>;
    /**
     * Constructs a `GET` request that interprets the body as a JSON object and
     * returns the response body as a JSON object.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     *
     * @return An `Observable` of the response body as a JSON object.
     */
    get(url: string, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<Object>;
    /**
     * Constructs a `GET` request that interprets the body as a JSON object and returns
     * the response body in a given type.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse`, with a response body in the requested type.
     */
    get<T>(url: string, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<T>;
    /**
     * Constructs a `HEAD` request that interprets the body as an `ArrayBuffer` and
     * returns the response as an `ArrayBuffer`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.
     */
    head(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<ArrayBuffer>;
    /**
     * Constructs a `HEAD` request that interprets the body as a `Blob` and returns
     * the response as a `Blob`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return  An `Observable` of the response, with the response body as a `Blob`.
     */
    head(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<Blob>;
    /**
     * Constructs a `HEAD` request that interprets the body as a text string and returns the response
     * as a string value.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body of type string.
     */
    head(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<string>;
    /**
     * Constructs a `HEAD` request that interprets the body as an  `ArrayBuffer`
     *  and returns the full event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of tall `HttpEvents` for the request,
     * with the response body as an `ArrayBuffer`.
     */
    head(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpEvent<ArrayBuffer>>;
    /**
     * Constructs a `HEAD` request that interprets the body as a `Blob` and
     * returns the full event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of all `HttpEvents` for the request,
     * with the response body as a `Blob`.
     */
    head(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Blob>>;
    /**
     * Constructs a `HEAD` request that interprets the body as a text string
     * and returns the full event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of all HttpEvents for the request, with the response body of type string.
     */
    head(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpEvent<string>>;
    /**
     * Constructs a `HEAD` request that interprets the body as a JSON object
     * and returns the full HTTP event stream.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of all `HTTPEvents` for the request, with a response body of
     * type `Object`.
     */
    head(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Object>>;
    /**
     * Constructs a `HEAD` request that interprets the body as a JSON object and
     * returns the full event stream.
     *
     * @return An `Observable` of all the `HTTPEvents` for the request
     * , with a response body in the requested type.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     */
    head<T>(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<T>>;
    /**
     * Constructs a `HEAD` request that interprets the body as an `ArrayBuffer`
     *  and returns the full HTTP response.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse` for the request,
     * with the response body as an `ArrayBuffer`.
     */
    head(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpResponse<ArrayBuffer>>;
    /**
     * Constructs a `HEAD` request that interprets the body as a `Blob` and returns
     * the full `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse` for the request,
     * with the response body as a blob.
     */
    head(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Blob>>;
    /**
     * Constructs a `HEAD` request that interprets the body as text stream
     * and returns the full `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse` for the request,
     * with the response body of type string.
     */
    head(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpResponse<string>>;
    /**
     * Constructs a `HEAD` request that interprets the body as a JSON object and
     * returns the full `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse` for the request,
     * with the response body of type `Object`.
     */
    head(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Object>>;
    /**
     * Constructs a `HEAD` request that interprets the body as a JSON object
     * and returns the full `HTTPResponse`.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse` for the request,
     * with a responmse body of the requested type.
     */
    head<T>(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<T>>;
    /**
     * Constructs a `HEAD` request that interprets the body as a JSON object and
     * returns the response body as a JSON object.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the response, with the response body as a JSON object.
     */
    head(url: string, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<Object>;
    /**
     * Constructs a `HEAD` request that interprets the body as a JSON object and returns
     * the response in a given type.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     * @return An `Observable` of the `HTTPResponse` for the request,
     * with a response body of the given type.
     */
    head<T>(url: string, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<T>;
    /**
     * Constructs a `JSONP` request for the given URL and name of the callback parameter.
     *
     * @param url The resource URL.
     * @param callbackParam The callback function name.
     *
     * @return An `Observable` of the response object, with response body as an object.
     */
    jsonp(url: string, callbackParam: string): Observable<Object>;
    /**
     * Constructs a `JSONP` request for the given URL and name of the callback parameter.
     *
     * @param url The resource URL.
     * @param callbackParam The callback function name.
     *
     * You must install a suitable interceptor, such as one provided by `HttpClientJsonpModule`.
     * If no such interceptor is reached,
     * then the `JSONP` request can be rejected by the configured backend.
     *
     * @return An `Observable` of the response object, with response body in the requested type.
     */
    jsonp<T>(url: string, callbackParam: string): Observable<T>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as an
     * `ArrayBuffer` and returns the response as an `ArrayBuffer`.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.
     */
    options(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<ArrayBuffer>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as a `Blob` and returns
     * the response as a `Blob`.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of the response, with the response body as a `Blob`.
     */
    options(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<Blob>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as a text string and
     * returns a string value.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of the response, with the response body of type string.
     */
    options(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<string>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as an `ArrayBuffer`
     *  and returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return  An `Observable` of all `HttpEvents` for the request,
     * with the response body as an `ArrayBuffer`.
     */
    options(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpEvent<ArrayBuffer>>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as a `Blob` and
     * returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of all `HttpEvents` for the request,
     * with the response body as a `Blob`.
     */
    options(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Blob>>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as a text string
     * and returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of all the `HTTPEvents` for the request,
     * with the response body of type string.
     */
    options(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpEvent<string>>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as a JSON object
     * and returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of all the `HttpEvents` for the request with the response
     * body of type `Object`.
     */
    options(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Object>>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as a JSON object and
     * returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of all the `HttpEvents` for the request,
     * with a response body in the requested type.
     */
    options<T>(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<T>>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as an `ArrayBuffer`
     *  and returns the full HTTP response.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of the `HttpResponse` for the request,
     * with the response body as an `ArrayBuffer`.
     */
    options(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpResponse<ArrayBuffer>>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as a `Blob`
     *  and returns the full `HTTPResponse`.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of the `HttpResponse` for the request,
     *  with the response body as a `Blob`.
     */
    options(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Blob>>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as text stream
     * and returns the full `HTTPResponse`.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of the `HttpResponse` for the request,
     *  with the response body of type string.
     */
    options(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpResponse<string>>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as a JSON object
     * and returns the full `HTTPResponse`.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of the `HttpResponse` for the request,
     * with the response body of type `Object`.
     */
    options(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Object>>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as a JSON object and
     * returns the full `HTTPResponse`.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of the `HttpResponse` for the request,
     * with a response body in the requested type.
     */
    options<T>(url: string, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<T>>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as a JSON object and returns the response
     * body as a JSON object.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of the response, with the response body as a JSON object.
     */
    options(url: string, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<Object>;
    /**
     * Constructs an `OPTIONS` request that interprets the body as a JSON object and returns the response
     * in a given type.
     *
     * @param url The endpoint URL.
     * @param options HTTP options.
     *
     * @return An `Observable` of the `HTTPResponse`, with a response body of the given type.
     */
    options<T>(url: string, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<T>;
    /**
     * Constructs a `PATCH` request that interprets the body as an `ArrayBuffer` and returns
     * the response as an `ArrayBuffer`.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.
     */
    patch(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<ArrayBuffer>;
    /**
     * Constructs a `PATCH` request that interprets the body as a `Blob` and returns the response
     * as a `Blob`.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return An `Observable` of the response, with the response body as a `Blob`.
     */
    patch(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<Blob>;
    /**
     * Constructs a `PATCH` request that interprets the body as as a text string and
     * returns the response as a string value.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return An `Observable` of the response, with a response body of type string.
     */
    patch(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<string>;
    /**
     * Constructs a `PATCH` request that interprets the body as an `ArrayBuffer` and
     *  returns the the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return An `Observable` of all the `HTTPevents` for the request,
     * with the response body as an `ArrayBuffer`.
     */
    patch(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpEvent<ArrayBuffer>>;
    /**
     * Constructs a `PATCH` request that interprets the body as a `Blob`
     *  and returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return An `Observable` of all the `HTTPevents` for the request, with the
     * response body as `Blob`.
     */
    patch(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Blob>>;
    /**
     * Constructs a `PATCH` request that interprets the body as a text string and
     * returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return An `Observable` of all the `HTTPevents`for the request, with a
     * response body of type string.
     */
    patch(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpEvent<string>>;
    /**
     * Constructs a `PATCH` request that interprets the body as a JSON object
     * and returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return An `Observable` of all the `HTTPevents` for the request,
     * with a response body of type `Object`.
     */
    patch(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Object>>;
    /**
     * Constructs a `PATCH` request that interprets the body as a JSON object
     * and returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return An `Observable` of all the `HTTPevents` for the request,
     *  with a response body in the requested type.
     */
    patch<T>(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<T>>;
    /**
     * Constructs a `PATCH` request that interprets the body as an `ArrayBuffer`
     *  and returns the full `HTTPResponse`.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return  An `Observable` of the `HttpResponse` for the request,
     *  with the response body as an `ArrayBuffer`.
     */
    patch(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpResponse<ArrayBuffer>>;
    /**
     * Constructs a `PATCH` request that interprets the body as a `Blob` and returns the full
     * `HTTPResponse`.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return  An `Observable` of the `HttpResponse` for the request,
     * with the response body as a `Blob`.
     */
    patch(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Blob>>;
    /**
     * Constructs a `PATCH` request that interprets the body as a text stream and returns the
     * full `HTTPResponse`.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return  An `Observable` of the `HttpResponse` for the request,
     * with a response body of type string.
     */
    patch(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpResponse<string>>;
    /**
     * Constructs a `PATCH` request that interprets the body as a JSON object
     * and returns the full `HTTPResponse`.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return An `Observable` of the `HttpResponse` for the request,
     * with a response body in the requested type.
     */
    patch(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Object>>;
    /**
     * Constructs a `PATCH` request that interprets the body as a JSON object
     * and returns the full `HTTPResponse`.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return An `Observable` of the `HttpResponse` for the request,
     * with a response body in the given type.
     */
    patch<T>(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<T>>;
    /**
     * Constructs a `PATCH` request that interprets the body as a JSON object and
     * returns the response body as a JSON object.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return An `Observable` of the response, with the response body as a JSON object.
     */
    patch(url: string, body: any | null, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<Object>;
    /**
     * Constructs a `PATCH` request that interprets the body as a JSON object
     * and returns the response in a given type.
     *
     * @param url The endpoint URL.
     * @param body The resources to edit.
     * @param options HTTP options.
     *
     * @return  An `Observable` of the `HttpResponse` for the request,
     * with a response body in the given type.
     */
    patch<T>(url: string, body: any | null, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<T>;
    /**
     * Constructs a `POST` request that interprets the body as an as an `ArrayBuffer` and returns
     * an `ArrayBuffer`.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options.
     *
     * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.
     */
    post(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<ArrayBuffer>;
    /**
     * Constructs a `POST` request that interprets the body as a `Blob` and returns the
     * response as a `Blob`.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return An `Observable` of the response, with the response body as a `Blob`.
     */
    post(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<Blob>;
    /**
     * Constructs a `POST` request that interprets the body as a text string and
     * returns the response as a string value.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return An `Observable` of the response, with a response body of type string.
     */
    post(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<string>;
    /**
     * Constructs a `POST` request that interprets the body as an `ArrayBuffer` and
     * returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return An `Observable` of all `HttpEvents` for the request,
     * with the response body as an `ArrayBuffer`.
     */
    post(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpEvent<ArrayBuffer>>;
    /**
     * Constructs a `POST` request that interprets the body as a `Blob`
     * and returns the response in an observable of the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return An `Observable` of all `HttpEvents` for the request, with the response body as `Blob`.
     */
    post(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Blob>>;
    /**
     * Constructs a `POST` request that interprets the body as a text string and returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return  An `Observable` of all `HttpEvents` for the request,
     * with a response body of type string.
     */
    post(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpEvent<string>>;
    /**
     * Constructs a POST request that interprets the body as a JSON object and returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return  An `Observable` of all `HttpEvents` for the request,
     * with a response body of type `Object`.
     */
    post(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Object>>;
    /**
     * Constructs a POST request that interprets the body as a JSON object and returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return An `Observable` of all `HttpEvents` for the request,
     * with a response body in the requested type.
     */
    post<T>(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<T>>;
    /**
     * Constructs a POST request that interprets the body as an `ArrayBuffer`
     *  and returns the full `HTTPresponse`.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return  An `Observable` of the `HTTPResponse` for the request, with the response body as an `ArrayBuffer`.
     */
    post(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpResponse<ArrayBuffer>>;
    /**
     * Constructs a `POST` request that interprets the body as a `Blob` and returns the full
     * `HTTPResponse`.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return An `Observable` of the `HTTPResponse` for the request,
     * with the response body as a `Blob`.
     */
    post(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Blob>>;
    /**
     * Constructs a `POST` request that interprets the body as a text stream and returns
     * the full `HTTPResponse`.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return  An `Observable` of the `HTTPResponse` for the request,
     * with a response body of type string.
     */
    post(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpResponse<string>>;
    /**
     * Constructs a `POST` request that interprets the body as a JSON object
     * and returns the full `HTTPResponse`.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return An `Observable` of the `HTTPResponse` for the request, with a response body of type
     * `Object`.
     */
    post(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Object>>;
    /**
     * Constructs a `POST` request that interprets the body as a JSON object and returns the full
     * `HTTPResponse`.
     *
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return An `Observable` of the `HTTPResponse` for the request, with a response body in the requested type.
     */
    post<T>(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<T>>;
    /**
     * Constructs a `POST` request that interprets the body as a
     * JSON object and returns the response body as a JSON object.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return An `Observable` of the response, with the response body as a JSON object.
     */
    post(url: string, body: any | null, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<Object>;
    /**
     * Constructs a `POST` request that interprets the body as a JSON object
     * and returns an observable of the response.
     *
     * @param url The endpoint URL.
     * @param body The content to replace with.
     * @param options HTTP options
     *
     * @return  An `Observable` of the `HTTPResponse` for the request, with a response body in the requested type.
     */
    post<T>(url: string, body: any | null, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<T>;
    /**
     * Constructs a `PUT` request that interprets the body as an `ArrayBuffer` and returns the
     * response as an `ArrayBuffer`.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.
     */
    put(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<ArrayBuffer>;
    /**
     * Constructs a `PUT` request that interprets the body as a `Blob` and returns
     * the response as a `Blob`.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of the response, with the response body as a `Blob`.
     */
    put(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<Blob>;
    /**
     * Constructs a `PUT` request that interprets the body as a text string and
     * returns the response as a string value.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of the response, with a response body of type string.
     */
    put(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<string>;
    /**
     * Constructs a `PUT` request that interprets the body as an `ArrayBuffer` and
     * returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of all `HttpEvents` for the request,
     * with the response body as an `ArrayBuffer`.
     */
    put(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpEvent<ArrayBuffer>>;
    /**
     * Constructs a `PUT` request that interprets the body as a `Blob` and returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of all `HttpEvents` for the request,
     * with the response body as a `Blob`.
     */
    put(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Blob>>;
    /**
     * Constructs a `PUT` request that interprets the body as a text string and returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of all HttpEvents for the request, with a response body
     * of type string.
     */
    put(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpEvent<string>>;
    /**
     * Constructs a `PUT` request that interprets the body as a JSON object and returns the full event stream.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of all `HttpEvents` for the request, with a response body of
     * type `Object`.
     */
    put(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<Object>>;
    /**
     * Constructs a `PUT` request that interprets the body as a JSON object and returns the
     * full event stream.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of all `HttpEvents` for the request,
     * with a response body in the requested type.
     */
    put<T>(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'events';
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpEvent<T>>;
    /**
     * Constructs a `PUT` request that interprets the body as an
     * `ArrayBuffer` and returns an observable of the full HTTP response.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of the `HTTPResponse` for the request, with the response body as an `ArrayBuffer`.
     */
    put(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'arraybuffer';
        withCredentials?: boolean;
    }): Observable<HttpResponse<ArrayBuffer>>;
    /**
     * Constructs a `PUT` request that interprets the body as a `Blob` and returns the
     * full HTTP response.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of the `HTTPResponse` for the request,
     * with the response body as a `Blob`.
     */
    put(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'blob';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Blob>>;
    /**
     * Constructs a `PUT` request that interprets the body as a text stream and returns the
     * full HTTP response.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of the `HTTPResponse` for the request, with a response body of type string.
     */
    put(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType: 'text';
        withCredentials?: boolean;
    }): Observable<HttpResponse<string>>;
    /**
     * Constructs a `PUT` request that interprets the body as a JSON object and returns the full HTTP response.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of the `HTTPResponse` for the request, with a response body
     * of type 'Object`.
     */
    put(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<Object>>;
    /**
     * Constructs a `PUT` request that interprets the body as a JSON object and returns the full HTTP response.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of the `HTTPResponse` for the request,
     * with a response body in the requested type.
     */
    put<T>(url: string, body: any | null, options: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe: 'response';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<HttpResponse<T>>;
    /**
     * Constructs a `PUT` request that interprets the body as a JSON object and returns the response
     * body as a JSON object.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of the response, with the response body as a JSON object.
     */
    put(url: string, body: any | null, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<Object>;
    /**
     * Constructs a `PUT` request that interprets the body as a JSON object
     * and returns an observable of the response.
     *
     * @param url The endpoint URL.
     * @param body The resources to add/update.
     * @param options HTTP options
     *
     * @return An `Observable` of the `HTTPResponse` for the request, with a response body in the requested type.
     */
    put<T>(url: string, body: any | null, options?: {
        headers?: HttpHeaders | {
            [header: string]: string | string[];
        };
        observe?: 'body';
        params?: HttpParams | {
            [param: string]: string | string[];
        };
        reportProgress?: boolean;
        responseType?: 'json';
        withCredentials?: boolean;
    }): Observable<T>;
}

/**
 * Configures the [dependency injector](guide/glossary#injector) for `HttpClient`
 * with supporting services for JSONP.
 * Without this module, Jsonp requests reach the backend
 * with method JSONP, where they are rejected.
 *
 * You can add interceptors to the chain behind `HttpClient` by binding them to the
 * multiprovider for built-in [DI token](guide/glossary#di-token) `HTTP_INTERCEPTORS`.
 *
 * @publicApi
 */
export declare class HttpClientJsonpModule {
}

/**
 * Configures the [dependency injector](guide/glossary#injector) for `HttpClient`
 * with supporting services for XSRF. Automatically imported by `HttpClientModule`.
 *
 * You can add interceptors to the chain behind `HttpClient` by binding them to the
 * multiprovider for built-in [DI token](guide/glossary#di-token) `HTTP_INTERCEPTORS`.
 *
 * @publicApi
 */
export declare class HttpClientModule {
}

/**
 * Configures XSRF protection support for outgoing requests.
 *
 * For a server that supports a cookie-based XSRF protection system,
 * use directly to configure XSRF protection with the correct
 * cookie and header names.
 *
 * If no names are supplied, the default cookie name is `XSRF-TOKEN`
 * and the default header name is `X-XSRF-TOKEN`.
 *
 * @publicApi
 */
export declare class HttpClientXsrfModule {
    /**
     * Disable the default XSRF protection.
     */
    static disable(): ModuleWithProviders<HttpClientXsrfModule>;
    /**
     * Configure XSRF protection.
     * @param options An object that can specify either or both
     * cookie name or header name.
     * - Cookie name default is `XSRF-TOKEN`.
     * - Header name default is `X-XSRF-TOKEN`.
     *
     */
    static withOptions(options?: {
        cookieName?: string;
        headerName?: string;
    }): ModuleWithProviders<HttpClientXsrfModule>;
}

/**
 * A download progress event.
 *
 * @publicApi
 */
export declare interface HttpDownloadProgressEvent extends HttpProgressEvent {
    type: HttpEventType.DownloadProgress;
    /**
     * The partial response body as downloaded so far.
     *
     * Only present if the responseType was `text`.
     */
    partialText?: string;
}

/**
 * A response that represents an error or failure, either from a
 * non-successful HTTP status, an error while executing the request,
 * or some other failure which occurred during the parsing of the response.
 *
 * Any error returned on the `Observable` response stream will be
 * wrapped in an `HttpErrorResponse` to provide additional context about
 * the state of the HTTP layer when the error occurred. The error property
 * will contain either a wrapped Error object or the error response returned
 * from the server.
 *
 * @publicApi
 */
export declare class HttpErrorResponse extends HttpResponseBase implements Error {
    readonly name = "HttpErrorResponse";
    readonly message: string;
    readonly error: any | null;
    /**
     * Errors are never okay, even when the status code is in the 2xx success range.
     */
    readonly ok = false;
    constructor(init: {
        error?: any;
        headers?: HttpHeaders;
        status?: number;
        statusText?: string;
        url?: string;
    });
}

/**
 * Union type for all possible events on the response stream.
 *
 * Typed according to the expected type of the response.
 *
 * @publicApi
 */
export declare type HttpEvent<T> = HttpSentEvent | HttpHeaderResponse | HttpResponse<T> | HttpProgressEvent | HttpUserEvent<T>;

/**
 * Type enumeration for the different kinds of `HttpEvent`.
 *
 * @publicApi
 */
export declare enum HttpEventType {
    /**
     * The request was sent out over the wire.
     */
    Sent = 0,
    /**
     * An upload progress event was received.
     */
    UploadProgress = 1,
    /**
     * The response status code and headers were received.
     */
    ResponseHeader = 2,
    /**
     * A download progress event was received.
     */
    DownloadProgress = 3,
    /**
     * The full response including the body was received.
     */
    Response = 4,
    /**
     * A custom event from an interceptor or a backend.
     */
    User = 5
}

/**
 * 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.
 *
 * @publicApi
 */
export declare abstract class HttpHandler {
    abstract handle(req: HttpRequest<any>): Observable<HttpEvent<any>>;
}

/**
 * A partial HTTP response which only includes the status and header data,
 * but no response body.
 *
 * `HttpHeaderResponse` is a `HttpEvent` available on the response
 * event stream, only when progress events are requested.
 *
 * @publicApi
 */
export declare class HttpHeaderResponse extends HttpResponseBase {
    /**
     * Create a new `HttpHeaderResponse` with the given parameters.
     */
    constructor(init?: {
        headers?: HttpHeaders;
        status?: number;
        statusText?: string;
        url?: string;
    });
    readonly type: HttpEventType.ResponseHeader;
    /**
     * Copy this `HttpHeaderResponse`, overriding its contents with the
     * given parameter hash.
     */
    clone(update?: {
        headers?: HttpHeaders;
        status?: number;
        statusText?: string;
        url?: string;
    }): HttpHeaderResponse;
}


/**
 * `HttpHeaders` class represents the header configuration options for an HTTP request.
 * Instances should be assumed immutable with lazy parsing.
 *
 * @publicApi
 */
export declare class HttpHeaders {
    /**
     * Internal map of lowercase header names to values.
     */
    private headers;
    /**
     * Internal map of lowercased header names to the normalized
     * form of the name (the form seen first).
     */
    private normalizedNames;
    /**
     * Complete the lazy initialization of this object (needed before reading).
     */
    private lazyInit;
    /**
     * Queued updates to be materialized the next initialization.
     */
    private lazyUpdate;
    /**  Constructs a new HTTP header object with the given values.*/
    constructor(headers?: string | {
        [name: string]: string | string[];
    });
    /**
     * Checks for existence of a header by a given name.
     *
     * @param name The header name to check for existence.
     *
     * @returns Whether the header exits.
     */
    has(name: string): boolean;
    /**
     * Returns the first header value that matches a given name.
     *
     * @param name The header name to retrieve.
     *
     * @returns A string if the header exists, null otherwise
     */
    get(name: string): string | null;
    /**
     * Returns the names of the headers.
     *
     * @returns A list of header names.
     */
    keys(): string[];
    /**
     * Returns a list of header values for a given header name.
     *
     * @param name The header name from which to retrieve the values.
     *
     * @returns A string of values if the header exists, null otherwise.
     */
    getAll(name: string): string[] | null;
    /**
     * Appends a new header value to the existing set of
     * header values.
     *
     * @param name The header name for which to append the values.
     *
     * @returns A clone of the HTTP header object with the value appended.
     */
    append(name: string, value: string | string[]): HttpHeaders;
    /**
     * Sets a header value for a given name. If the header name already exists,
     * its value is replaced with the given value.
     *
     * @param name The header name.
     * @param value Provides the value to set or overide for a given name.
     *
     * @returns A clone of the HTTP header object with the newly set header value.
     */
    set(name: string, value: string | string[]): HttpHeaders;
    /**
     * Deletes all header values for a given name.
     *
     * @param name The header name.
     * @param value The header values to delete for a given name.
     *
     * @returns A clone of the HTTP header object.
     */
    delete(name: string, value?: string | string[]): HttpHeaders;
    private maybeSetNormalizedName;
    private init;
    private copyFrom;
    private clone;
    private applyUpdate;
}

/**
 * Intercepts `HttpRequest` or `HttpResponse` and handles them.
 *
 * Most interceptors transform the outgoing request before passing it to the
 * next interceptor in the chain, by calling `next.handle(transformedReq)`.
 * An interceptor may transform the
 * response event stream as well, by applying additional RxJS operators on the stream
 * returned by `next.handle()`.
 *
 * More rarely, an interceptor may handle the request entirely,
 * and compose a new event stream instead of invoking `next.handle()`. This is an
 * acceptable behavior, but keep in mind that further interceptors will be skipped entirely.
 *
 * It is also rare but valid for an interceptor to return multiple responses on the
 * event stream for a single request.
 *
 * @publicApi
 *
 * @see [HTTP Guide](guide/http#intercepting-requests-and-responses)
 *
 * @usageNotes
 *
 * To use the same instance of `HttpInterceptors` for the entire app, import the `HttpClientModule`
 * only in your `AppModule`, and add the interceptors to the root application injector .
 * If you import `HttpClientModule` multiple times across different modules (for example, in lazy
 * loading modules), each import creates a new copy of the `HttpClientModule`, which overwrites the interceptors
 * provided in the root module.
 *
 */
export declare interface HttpInterceptor {
    /**
     * * **req**: The outgoing request to handle
     * * **next**: The next interceptor in the chain, or the backend if no interceptors in the chain.
     *
     */
    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>;
}

declare type HttpObserve = 'body' | 'events' | 'response';


/**
 * A codec for encoding and decoding parameters in URLs.
 *
 * Used by `HttpParams`.
 *
 * @publicApi
 **/
export declare interface HttpParameterCodec {
    encodeKey(key: string): string;
    encodeValue(value: string): string;
    decodeKey(key: string): string;
    decodeValue(value: string): string;
}

/**
 * An HTTP request/response body that represents serialized parameters,
 * per the MIME type `application/x-www-form-urlencoded`.
 *
 * This class is immutable - all mutation operations return a new instance.
 *
 * @publicApi
 */
export declare class HttpParams {
    private map;
    private encoder;
    private updates;
    private cloneFrom;
    constructor(options?: HttpParamsOptions);
    /**
     * Check whether the body has one or more values for the given parameter name.
     */
    has(param: string): boolean;
    /**
     * Get the first value for the given parameter name, or `null` if it's not present.
     */
    get(param: string): string | null;
    /**
     * Get all values for the given parameter name, or `null` if it's not present.
     */
    getAll(param: string): string[] | null;
    /**
     * Get all the parameter names for this body.
     */
    keys(): string[];
    /**
     * Construct a new body with an appended value for the given parameter name.
     */
    append(param: string, value: string): HttpParams;
    /**
     * Construct a new body with a new value for the given parameter name.
     */
    set(param: string, value: string): HttpParams;
    /**
     * Construct a new body with either the given value for the given parameter
     * removed, if a value is given, or all values for the given parameter removed
     * if not.
     */
    delete(param: string, value?: string): HttpParams;
    /**
     * Serialize the body to an encoded string, where key-value pairs (separated by `=`) are
     * separated by `&`s.
     */
    toString(): string;
    private clone;
    private init;
}

/** Options used to construct an `HttpParams` instance. */
declare interface HttpParamsOptions {
    /**
     * String representation of the HTTP params in URL-query-string format. Mutually exclusive with
     * `fromObject`.
     */
    fromString?: string;
    /** Object map of the HTTP params. Mutually exclusive with `fromString`. */
    fromObject?: {
        [param: string]: string | string[];
    };
    /** Encoding codec used to parse and serialize the params. */
    encoder?: HttpParameterCodec;
}

/**
 * Base interface for progress events.
 *
 * @publicApi
 */
export declare interface HttpProgressEvent {
    /**
     * Progress event type is either upload or download.
     */
    type: HttpEventType.DownloadProgress | HttpEventType.UploadProgress;
    /**
     * Number of bytes uploaded or downloaded.
     */
    loaded: number;
    /**
     * Total number of bytes to upload or download. Depending on the request or
     * response, this may not be computable and thus may not be present.
     */
    total?: number;
}

/**
 * An outgoing HTTP request with an optional typed body.
 *
 * `HttpRequest` represents an outgoing request, including URL, method,
 * headers, body, and other request configuration options. Instances should be
 * assumed to be immutable. To modify a `HttpRequest`, the `clone`
 * method should be used.
 *
 * @publicApi
 */
export declare class HttpRequest<T> {
    readonly url: string;
    /**
     * The request body, or `null` if one isn't set.
     *
     * Bodies are not enforced to be immutable, as they can include a reference to any
     * user-defined data type. However, interceptors should take care to preserve
     * idempotence by treating them as such.
     */
    readonly body: T | null;
    /**
     * Outgoing headers for this request.
     */
    readonly headers: HttpHeaders;
    /**
     * Whether this request should be made in a way that exposes progress events.
     *
     * Progress events are expensive (change detection runs on each event) and so
     * they should only be requested if the consumer intends to monitor them.
     */
    readonly reportProgress: boolean;
    /**
     * Whether this request should be sent with outgoing credentials (cookies).
     */
    readonly withCredentials: boolean;
    /**
     * The expected response type of the server.
     *
     * This is used to parse the response appropriately before returning it to
     * the requestee.
     */
    readonly responseType: 'arraybuffer' | 'blob' | 'json' | 'text';
    /**
     * The outgoing HTTP request method.
     */
    readonly method: string;
    /**
     * Outgoing URL parameters.
     */
    readonly params: HttpParams;
    /**
     * The outgoing URL with all URL parameters set.
     */
    readonly urlWithParams: string;
    constructor(method: 'DELETE' | 'GET' | 'HEAD' | 'JSONP' | 'OPTIONS', url: string, init?: {
        headers?: HttpHeaders;
        reportProgress?: boolean;
        params?: HttpParams;
        responseType?: 'arraybuffer' | 'blob' | 'json' | 'text';
        withCredentials?: boolean;
    });
    constructor(method: 'POST' | 'PUT' | 'PATCH', url: string, body: T | null, init?: {
        headers?: HttpHeaders;
        reportProgress?: boolean;
        params?: HttpParams;
        responseType?: 'arraybuffer' | 'blob' | 'json' | 'text';
        withCredentials?: boolean;
    });
    constructor(method: string, url: string, body: T | null, init?: {
        headers?: HttpHeaders;
        reportProgress?: boolean;
        params?: HttpParams;
        responseType?: 'arraybuffer' | 'blob' | 'json' | 'text';
        withCredentials?: boolean;
    });
    /**
     * Transform the free-form body into a serialized format suitable for
     * transmission to the server.
     */
    serializeBody(): ArrayBuffer | Blob | FormData | string | null;
    /**
     * Examine the body and attempt to infer an appropriate MIME type
     * for it.
     *
     * If no such type can be inferred, this method will return `null`.
     */
    detectContentTypeHeader(): string | null;
    clone(): HttpRequest<T>;
    clone(update: {
        headers?: HttpHeaders;
        reportProgress?: boolean;
        params?: HttpParams;
        responseType?: 'arraybuffer' | 'blob' | 'json' | 'text';
        withCredentials?: boolean;
        body?: T | null;
        method?: string;
        url?: string;
        setHeaders?: {
            [name: string]: string | string[];
        };
        setParams?: {
            [param: string]: string;
        };
    }): HttpRequest<T>;
    clone<V>(update: {
        headers?: HttpHeaders;
        reportProgress?: boolean;
        params?: HttpParams;
        responseType?: 'arraybuffer' | 'blob' | 'json' | 'text';
        withCredentials?: boolean;
        body?: V | null;
        method?: string;
        url?: string;
        setHeaders?: {
            [name: string]: string | string[];
        };
        setParams?: {
            [param: string]: string;
        };
    }): HttpRequest<V>;
}

/**
 * A full HTTP response, including a typed response body (which may be `null`
 * if one was not returned).
 *
 * `HttpResponse` is a `HttpEvent` available on the response event
 * stream.
 *
 * @publicApi
 */
export declare class HttpResponse<T> extends HttpResponseBase {
    /**
     * The response body, or `null` if one was not returned.
     */
    readonly body: T | null;
    /**
     * Construct a new `HttpResponse`.
     */
    constructor(init?: {
        body?: T | null;
        headers?: HttpHeaders;
        status?: number;
        statusText?: string;
        url?: string;
    });
    readonly type: HttpEventType.Response;
    clone(): HttpResponse<T>;
    clone(update: {
        headers?: HttpHeaders;
        status?: number;
        statusText?: string;
        url?: string;
    }): HttpResponse<T>;
    clone<V>(update: {
        body?: V | null;
        headers?: HttpHeaders;
        status?: number;
        statusText?: string;
        url?: string;
    }): HttpResponse<V>;
}

/**
 * Base class for both `HttpResponse` and `HttpHeaderResponse`.
 *
 * @publicApi
 */
export declare abstract class HttpResponseBase {
    /**
     * All response headers.
     */
    readonly headers: HttpHeaders;
    /**
     * Response status code.
     */
    readonly status: number;
    /**
     * Textual description of response status code.
     *
     * Do not depend on this.
     */
    readonly statusText: string;
    /**
     * URL of the resource retrieved, or null if not available.
     */
    readonly url: string | null;
    /**
     * Whether the status code falls in the 2xx range.
     */
    readonly ok: boolean;
    /**
     * Type of the response, narrowed to either the full response or the header.
     */
    readonly type: HttpEventType.Response | HttpEventType.ResponseHeader;
    /**
     * Super-constructor for all responses.
     *
     * The single parameter accepted is an initialization hash. Any properties
     * of the response passed there will override the default values.
     */
    constructor(init: {
        headers?: HttpHeaders;
        status?: number;
        statusText?: string;
        url?: string;
    }, defaultStatus?: number, defaultStatusText?: string);
}

/**
 * An event indicating that the request was sent to the server. Useful
 * when a request may be retried multiple times, to distinguish between
 * retries on the final event stream.
 *
 * @publicApi
 */
export declare interface HttpSentEvent {
    type: HttpEventType.Sent;
}

/**
 * An upload progress event.
 *
 * @publicApi
 */
export declare interface HttpUploadProgressEvent extends HttpProgressEvent {
    type: HttpEventType.UploadProgress;
}

/**
 * A class that uses `encodeURIComponent` and `decodeURIComponent` to
 * serialize and parse URL parameter keys and values. If you pass URL query parameters
 * without encoding, the query parameters can get misinterpreted at the receiving end.
 * Use the `HttpParameterCodec` class to encode and decode the query-string values.
 *
 * @publicApi
 */
export declare class HttpUrlEncodingCodec implements HttpParameterCodec {
    encodeKey(key: string): string;
    encodeValue(value: string): string;
    decodeKey(key: string): string;
    decodeValue(value: string): string;
}

/**
 * A user-defined event.
 *
 * Grouping all custom events under this type ensures they will be handled
 * and forwarded by all implementations of interceptors.
 *
 * @publicApi
 */
export declare interface HttpUserEvent<T> {
    type: HttpEventType.User;
}

/**
 * An `HttpBackend` which uses the XMLHttpRequest API to send
 * requests to a backend server.
 *
 * @publicApi
 */
export declare class HttpXhrBackend implements HttpBackend {
    private xhrFactory;
    constructor(xhrFactory: XhrFactory);
    /**
     * Process a request and return a stream of response events.
     */
    handle(req: HttpRequest<any>): Observable<HttpEvent<any>>;
}

/**
 * Retrieves the current XSRF token to use with the next outgoing request.
 *
 * @publicApi
 */
export declare abstract class HttpXsrfTokenExtractor {
    /**
     * Get the XSRF token to use with an outgoing request.
     *
     * Will be called for every request, so the token may change between requests.
     */
    abstract getToken(): string | null;
}

/**
 * `HttpBackend` that only processes `HttpRequest` with the JSONP method,
 * by performing JSONP style requests.
 *
 * @publicApi
 */
export declare class JsonpClientBackend implements HttpBackend {
    private callbackMap;
    private document;
    constructor(callbackMap: ɵangular_packages_common_http_http_b, document: any);
    /**
     * Get the name of the next callback method, by incrementing the global `nextRequestId`.
     */
    private nextCallback;
    /**
     * Process a JSONP request and return an event stream of the results.
     */
    handle(req: HttpRequest<never>): Observable<HttpEvent<any>>;
}

/**
 * An `HttpInterceptor` which identifies requests with the method JSONP and
 * shifts them to the `JsonpClientBackend`.
 *
 * @publicApi
 */
export declare class JsonpInterceptor {
    private jsonp;
    constructor(jsonp: JsonpClientBackend);
    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>;
}

/**
 * A wrapper around the `XMLHttpRequest` constructor.
 *
 * @publicApi
 */
export declare abstract class XhrFactory {
    abstract build(): XMLHttpRequest;
}

export declare class ɵangular_packages_common_http_http_a implements HttpInterceptor {
    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>;
}

/**
 * DI token/abstract type representing a map of JSONP callbacks.
 *
 * In the browser, this should always be the `window` object.
 *
 *
 */
export declare abstract class ɵangular_packages_common_http_http_b {
    [key: string]: (data: any) => void;
}

/**
 * Factory function that determines where to store JSONP callbacks.
 *
 * Ordinarily JSONP callbacks are stored on the `window` object, but this may not exist
 * in test environments. In that case, callbacks are stored on an anonymous object instead.
 *
 *
 */
export declare function ɵangular_packages_common_http_http_c(): Object;

/**
 * A factory for @{link HttpXhrBackend} that uses the `XMLHttpRequest` browser API.
 *
 *
 */
export declare class ɵangular_packages_common_http_http_d implements XhrFactory {
    constructor();
    build(): any;
}

export declare const ɵangular_packages_common_http_http_e: InjectionToken<string>;

export declare const ɵangular_packages_common_http_http_f: InjectionToken<string>;

/**
 * `HttpXsrfTokenExtractor` which retrieves the token from a cookie.
 */
export declare class ɵangular_packages_common_http_http_g implements HttpXsrfTokenExtractor {
    private doc;
    private platform;
    private cookieName;
    private lastCookieString;
    private lastToken;
    constructor(doc: any, platform: string, cookieName: string);
    getToken(): string | null;
}

/**
 * `HttpInterceptor` which adds an XSRF token to eligible outgoing requests.
 */
export declare class ɵangular_packages_common_http_http_h implements HttpInterceptor {
    private tokenService;
    private headerName;
    constructor(tokenService: HttpXsrfTokenExtractor, headerName: string);
    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>;
}

/**
 * An injectable `HttpHandler` that applies multiple interceptors
 * to a request before passing it to the given `HttpBackend`.
 *
 * The interceptors are loaded lazily from the injector, to allow
 * interceptors to themselves inject classes depending indirectly
 * on `HttpInterceptingHandler` itself.
 * @see `HttpInterceptor`
 */
export declare class ɵHttpInterceptingHandler implements HttpHandler {
    private backend;
    private injector;
    private chain;
    constructor(backend: HttpBackend, injector: Injector);
    handle(req: HttpRequest<any>): Observable<HttpEvent<any>>;
}

export { }
