def _validateurl(self, url):
        """assembles the server url"""
        parsed = urlparse(url)
        path = parsed.path.strip("/")
        if path:
            parts = path.split("/")
            url_types = ("admin", "manager", "rest")
            if any(i in parts for i in url_types):
                while parts.pop() not in url_types:
                    next
            elif "services" in parts:
                while parts.pop() not in "services":
                    next
            path = "/".join(parts)
        else:
            path = "arcgis"
        self._adminUrl = "%s://%s/%s/admin" % (parsed.scheme, parsed.netloc, path)
        return "%s://%s/%s/rest/services" % (parsed.scheme, parsed.netloc, path)
assembles the server url