def render_delete_book_result(book_format, jsonResponse, warning, book_id):
    if book_format:
        if jsonResponse:
            return json.dumps([warning, {"location": url_for("editbook.edit_book", book_id=book_id),
                                         "type": "success",
                                         "format": book_format,
                                         "message": _('Book Format Successfully Deleted')}])
        else:
            flash(_('Book Format Successfully Deleted'), category="success")
            return redirect(url_for('editbook.edit_book', book_id=book_id))
    else:
        if jsonResponse:
            return json.dumps([warning, {"location": url_for('web.index'),
                                         "type": "success",
                                         "format": book_format,
                                         "message": _('Book Successfully Deleted')}])
        else:
            flash(_('Book Successfully Deleted'), category="success")
            return redirect(url_for('web.index'))
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.