python/lib/django_1_4/django/contrib/gis/geoip/libgeoip.py

   1 import os
   2 from ctypes import CDLL
   3 from ctypes.util import find_library
   4 from django.conf import settings
   5
   6 # Creating the settings dictionary with any settings, if needed.
   7 GEOIP_SETTINGS = dict((key, getattr(settings, key))
   8                       for key in ('GEOIP_PATH', 'GEOIP_LIBRARY_PATH', 'GEOIP_COUNTRY', 'GEOIP_CITY')
   9                       if hasattr(settings, key))
  10 lib_path = GEOIP_SETTINGS.get('GEOIP_LIBRARY_PATH', None)
  11
  12 # The shared library for the GeoIP C API.  May be downloaded
  13 #  from http://www.maxmind.com/download/geoip/api/c/
  14 if lib_path:
  15     lib_name = None
  16 else:
  17     # TODO: Is this really the library name for Windows?
  18     lib_name = 'GeoIP'
  19
  20 # Getting the path to the GeoIP library.
  21 if lib_name: lib_path = find_library(lib_name)
  22 if lib_path is None: raise GeoIPException('Could not find the GeoIP library (tried "%s"). '
  23                                           'Try setting GEOIP_LIBRARY_PATH in your settings.' % lib_name)
  24 lgeoip = CDLL(lib_path)
  25
  26 # Getting the C `free` for the platform.
  27 if os.name == 'nt':
  28     libc = CDLL('msvcrt')
  29 else:
  30     libc = CDLL(None)
  31 free = libc.free