docs: private static String getContentTypeMime(final String httpContentType) {
          String mime = null;
          if (httpContentType != null) {
              final int i = httpContentType.indexOf(";");
              if (i == -1) {
                  mime = httpContentType.trim();
              } else {
                  mime = httpContentType.substring(0, i).trim();
              }
          }
          return mime;
      }