[util] Add central geolocation info library

util/location.py

@@ -0,0 +1,69 @@
+import json
+import time
+import urllib.request
+
+__document = None
+__data = {}
+__next = 0
+
+__sources = [
+        {
+            'url': 'http://free.ipwhois.io/json/',
+            'mapping': {
+                'latitude': 'latitude',
+                'longitude': 'longitude',
+                'country': 'country',
+                'ip': 'public_ip',
+            }
+        },
+        {
+            'url': 'http://ipapi.co/json',
+            'mapping': {
+                'latitude': 'latitude',
+                'longitude': 'longitude',
+                'country_name': 'country',
+                'ip': 'public_ip',
+            }
+        }
+]
+
+def __expired():
+    global __next
+    return __next <= time.time()
+
+def __load():
+    global __data
+    global __next
+
+    __data = {}
+    for src in __sources:
+        try:
+            tmp = json.loads(urllib.request.urlopen(src['url']).read())
+            for k, v in src['mapping'].items():
+                __data[v] = tmp.get(k, None)
+            __next = time.time() + 60*60*12 # update once every 12h
+            return
+        except Exception as e:
+            pass
+    __next = time.time() + 60*30 # error - try again every 30m
+
+def __get(name, default=None):
+    global __data
+    if not __data or __expired():
+        __load()
+    return __data.get(name, default)
+
+def reset():
+    global __next
+    __next = 0
+
+def coordinates():
+    return __get('latitude'), __get('longitude')
+
+def country():
+    return __get('country')
+
+def public_ip():
+    return __get('public_ip')
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4