def rename_all_authors(first_author, renamed_author, calibre_path="", localbook=None, gdrive=False):
    # Create new_author_dir from parameter or from database
    # Create new title_dir from database and add id
    if first_author:
        new_authordir = get_valid_filename(first_author, chars=96)
        for r in renamed_author:
            new_author = calibre_db.session.query(db.Authors).filter(db.Authors.name == r).first()
            old_author_dir = get_valid_filename(r, chars=96)
            new_author_rename_dir = get_valid_filename(new_author.name, chars=96)
            if gdrive:
                gFile = gd.getFileFromEbooksFolder(None, old_author_dir)
                if gFile:
                    gd.moveGdriveFolderRemote(gFile, new_author_rename_dir)
            else:
                if os.path.isdir(os.path.join(calibre_path, old_author_dir)):
                    try:
                        old_author_path = os.path.join(calibre_path, old_author_dir)
                        new_author_path = os.path.join(calibre_path, new_author_rename_dir)
                        shutil.move(os.path.normcase(old_author_path), os.path.normcase(new_author_path))
                    except (OSError) as ex:
                        log.error("Rename author from: %s to %s: %s", old_author_path, new_author_path, ex)
                        log.debug(ex, exc_info=True)
                        return _("Rename author from: '%(src)s' to '%(dest)s' failed with error: %(error)s",
                                 src=old_author_path, dest=new_author_path, error=str(ex))
    else:
        new_authordir = get_valid_filename(localbook.authors[0].name, chars=96)
    return new_authordir
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.