Blob to Json

common-error.model.ts

blobToJson(blob: Blob): Observable<any> {
    let loadend: Observable<any>;
    if (blob.type === 'application/json') {
      const reader = new FileReader();
      loadend = fromEvent(reader, 'loadend').pipe(
        map((read: any) => {
          this.logger.debug('blobToJson:loadend *', JSON.parse(read.target.result));
          return JSON.parse(read.target.result);
        })
      );
      reader.readAsText(blob);
    } else {
      loadend = of({});
    }
    return loadend;
}