def update_dir_structure_gdrive(book_id, first_author, renamed_author):
    book = calibre_db.get_book(book_id)

    authordir = book.path.split('/')[0]
    titledir = book.path.split('/')[1]
    new_authordir = rename_all_authors(first_author, renamed_author, gdrive=True)
    new_titledir = get_valid_filename(book.title, chars=96) + u" (" + str(book_id) + u")"

    if titledir != new_titledir:
        gFile = gd.getFileFromEbooksFolder(os.path.dirname(book.path), titledir)
        if gFile:
            gd.moveGdriveFileRemote(gFile, new_titledir)
            book.path = book.path.split('/')[0] + u'/' + new_titledir
            gd.updateDatabaseOnEdit(gFile['id'], book.path)     # only child folder affected
        else:
            return _(u'File %(file)s not found on Google Drive', file=book.path)  # file not found

    if authordir != new_authordir and authordir not in renamed_author:
        gFile = gd.getFileFromEbooksFolder(os.path.dirname(book.path), new_titledir)
        if gFile:
            gd.moveGdriveFolderRemote(gFile, new_authordir)
            book.path = new_authordir + u'/' + book.path.split('/')[1]
            gd.updateDatabaseOnEdit(gFile['id'], book.path)
        else:
            return _(u'File %(file)s not found on Google Drive', file=authordir)  # file not found

    # change location in database to new author/title path
    book.path = os.path.join(new_authordir, new_titledir).replace('\\', '/')
    return rename_files_on_change(first_author, renamed_author, book, gdrive=True)
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.