Django template filter to transform an IP address into GPS coordinates (for e.g. OpenLayers.js)

djangotag_locateip.py

# Copyright 2014 Matthieu Caneill
# Consider this equivalent to public domain, feel free to use it the way you want.

# pip install python-geoip
# pip install python-geoip-geolite2

import socket
from geoip import geolite2

@register.filter("locateip")
def locateip(value):
    def is_legal_ip(ip):
        try:
            socket.inet_pton(socket.AF_INET, address)
        except Exception:
            try:
                socket.inet_pton(socket.AF_INET6, address)
            except Exception:
                return False
        return True
    
    if not is_legal_ip(value):
        try:
            value = socket.gethostbyname(value)
        except Exception:
            return None
    try:
        match = geolite2.lookup(value)
        lat, lon = match.location
    except Exception as e:
        print value, e
        return None
    return '%s,%s' % (lon, lat)