perf: 优化使用两个 ip 库

apps/common/utils/ip/geoip/GeoLite2-City.mmdb

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+version https://git-lfs.github.com/spec/v1
+oid sha256:860b4d38beff81667c64da41c026a7dd28c3c93a28ae61fefaa7c26875f35638
+size 73906864

apps/common/utils/ip/geoip/__init__.py

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+from .utils import *

apps/common/utils/ip/geoip/utils.py

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+# -*- coding: utf-8 -*-
+#
+import os
+import ipaddress
+
+import geoip2.database
+from geoip2.errors import GeoIP2Error
+from django.utils.translation import ugettext_lazy as _
+from django.conf import settings
+
+__all__ = ['get_ip_city_by_geoip']
+reader = None
+
+
+def get_ip_city_by_geoip(ip):
+    if not ip or '.' not in ip or not isinstance(ip, str):
+        return _("Invalid ip")
+    if ':' in ip:
+        return 'IPv6'
+    global reader
+    if reader is None:
+        path = os.path.join(os.path.dirname(__file__), 'GeoLite2-City.mmdb')
+        reader = geoip2.database.Reader(path)
+
+    try:
+        is_private = ipaddress.ip_address(ip.strip()).is_private
+        if is_private:
+            return _('LAN')
+    except ValueError:
+        return _("Invalid ip")
+
+    try:
+        response = reader.city(ip)
+    except GeoIP2Error:
+        return {}
+
+    city_names = response.city.names or {}
+    lang = settings.LANGUAGE_CODE[:2]
+    if lang == 'zh':
+        lang = 'zh-CN'
+    city = city_names.get(lang, _("Unknown"))
+    return city
+
+