Class HttpClient

packages/common/http/src/client.ts:96–2667

 */
@Injectable({providedIn: 'root'})
export class HttpClient {
  constructor(private handler: HttpHandler) {}

  /**
   * Sends an `HttpRequest` and returns a stream of `HttpEvent`s.
   *
   * @return An `Observable` of the response, with the response body as a stream of `HttpEvent`s.
   */
  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;
      observe?: 'body';
      responseType: 'arraybuffer';
    } & HttpClientCommonOptions,
  ): 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;
      observe?: 'body';
      responseType: 'blob';
    } & HttpClientCommonOptions,
  ): 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.