invalid literal for int() with base 10: 'unknown'

[jplehmann]

Using Django 1.11 and django-iprestrict==1.7.0:

  File "/app/.heroku/python/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner 
    response = get_response(request) 
  File "/app/.heroku/python/lib/python2.7/site-packages/django/core/handlers/base.py", line 244, in _legacy_get_response 
    response = middleware_method(request) 
  File "/app/.heroku/python/lib/python2.7/site-packages/newrelic/hooks/framework_django.py", line 220, in wrapper 
    return wrapped(*args, **kwargs) 
  File "/app/.heroku/python/lib/python2.7/site-packages/iprestrict/middleware.py", line 42, in process_request 
    if self.restrictor.is_restricted(url, client_ip): 
  File "/app/.heroku/python/lib/python2.7/site-packages/iprestrict/restrictor.py", line 16, in is_restricted 
    if rule.matches_url(url) and rule.matches_ip(ip): 
  File "/app/.heroku/python/lib/python2.7/site-packages/iprestrict/models.py", line 229, in matches_ip 
    match = typed_ip_group(self.ip_group).matches(ip) 
  File "/app/.heroku/python/lib/python2.7/site-packages/iprestrict/models.py", line 101, in matches 
    if ip in r: 
  File "/app/.heroku/python/lib/python2.7/site-packages/iprestrict/models.py", line 167, in __contains__ 
    ip_nr = ipu.to_number(ip) 
  File "/app/.heroku/python/lib/python2.7/site-packages/iprestrict/ip_utils.py", line 22, in to_number 
    return ipv6_to_number(ip) if is_ipv6(ip) else ipv4_to_number(ip) 
  File "/app/.heroku/python/lib/python2.7/site-packages/iprestrict/ip_utils.py", line 26, in ipv4_to_number 
    return _ip_to_number(ip) 
  File "/app/.heroku/python/lib/python2.7/site-packages/iprestrict/ip_utils.py", line 88, in _ip_to_number 
    parts = [int(p, base) for p in reversed(parts)] 
ValueError: invalid literal for int() with base 10: 'unknown' 

[jplehmann]

Dug a little deeper and the input data causing this problem is from Heroku's router, which looks like:

fwd="unknown,XXX.XXX.XXX.XXX"

where X was a valid number.

While I do not know why Heroku does this, iprestrict still needs to validate the input before trying to parse it, so as not to crash.

[MariKiev]

I have the same issue. How it can be fixed?