帐号登录正常，获取 download_url 总是出错啊

[boyzhujian]

帐号登录正常，获取 download_url 总是出错啊

Traceback (most recent call last):
File "/root/.pyenv/versions/2.7.6/lib/python2.7/site-packages/web/application.py", line 239, in process
return self.handle()
File "/root/.pyenv/versions/2.7.6/lib/python2.7/site-packages/web/application.py", line 230, in handle
return self._delegate(fn, self.fvars, args)
File "/root/.pyenv/versions/2.7.6/lib/python2.7/site-packages/web/application.py", line 420, in _delegate
return handle_class(cls)
File "/root/.pyenv/versions/2.7.6/lib/python2.7/site-packages/web/application.py", line 396, in handle_class
return tocall(*args)
File "/home/wwwroot/yundemo.1h9d.com/launcher.py", line 98, in GET
return pcs.download_url(path)[0]
File "/home/wwwroot/yundemo.1h9d.com/api.py", line 670, in download_url
self.get_sign()
File "/home/wwwroot/yundemo.1h9d.com/api.py", line 604, in get_sign
sign1 = re.search(r'sign1 = '(.+?)';', html).group(1)
AttributeError: 'NoneType' object has no attribute 'group'