def _compress(self, config, ip):
url = ''
try:
link = Session.query(Link).filter(Link.configuration==config).first()
if not link:
link = Link()
link.configuration = config
link.ip = ip
Session.add(link)
Session.flush()
index = link.index
while index != 0:
index, remainder = divmod(index - 1, len(self._valid))
url += self._valid[remainder]
link.url = url
else:
url = link.url
Session.commit()
except Exception as ex:
log.exception('Failed to create shortcut for configuration %(configuration)s' % { 'configuration' : config})
return url
