Displaying ng2-pdf-viewer PDF from stream

Question

I have a page that uses ng2-pdf-viewer:

<pdf-viewer [src]="fileToDownload" [render-text]="true" style="display: block;"></pdf-viewer>

There is a Node API that populates that PDF and returns a URL:

this.httpClient.post(APIURL, JSON.stringify(body), options).subscribe(
      result => {
        let apiResponse: any = result;
          if (apiResponse.success == 1) {
            this.showPreviewPDF = true;
            let myfileToDownload = sessionStorage.getItem('endPoint') + "downloads/" + apiResponse.file;
            this.httpClient.get(myfileToDownload, { responseType: 'arraybuffer' })
              .subscribe((file: ArrayBuffer) => {
                this.fileToDownload = new Uint8Array(file);
              });
          }

      },
      error => {

      });

Then I get the stream for the PDF. I can see the PDF perfectly on the console network, but Im not able to display it.

I checked several examples, including changing this

this.fileToDownload = new Uint8Array(file);

by this

this.fileToDownload = file;

But I still cannot display the PDF on screen. It works fine if I point the PDF to a folder outside Node, but not as a stream.

Thanks.