Angular 7-下载为excel文件时文件损坏，击中二进制数据的URL

Question

我正在尝试使用Angular 6下载文件。我遇到的问题是，当将二进制文件下载到excel文件时，它已损坏。打开Excel时，它提示“文件格式和扩展名不匹配。文件可能已损坏或不安全。”请帮忙。

             export class AppComponent implements OnInit {
               constructor(private http: HttpClient) {}
                  downloadExcelFile() {
                    const url =
                      "https://myUrl.getmydata";

                    this.http
                      .get(url, { responseType: "blob" })
                      .subscribe(data => this.downLoadFile(data, "application/vnd.ms-excel"));
                  }

                  downLoadFile(data: any, type: string) {
                    var blob = new Blob([data], { type: type });
                    var url = window.URL.createObjectURL(blob);
                    var pwa = window.open(url);

                    if (!pwa || pwa.closed || typeof pwa.closed == "undefined") {
                      alert("Please disable your Pop-up blocker and try again.");
                    }
                  }
                }