Merge pull request #7 from farseerfc/aur4

try aur4 url first

nvchecker/source/aur.py

@@ -6,15 +6,30 @@ from tornado.httpclient import AsyncHTTPClient
 from tornado.escape import url_escape
 
 AUR_URL = 'https://aur.archlinux.org/rpc.php?type=info&arg='
+AUR4_URL = 'https://aur4.archlinux.org/rpc.php?type=info&arg='
 
 logger = logging.getLogger(__name__)
 
 def get_version(name, conf, callback):
   aurname = conf.get('aur') or name
-  url = AUR_URL + url_escape(aurname)
-  AsyncHTTPClient().fetch(url, partial(_aur_done, name, callback))
+  url4 = AUR4_URL + url_escape(aurname)
+  AsyncHTTPClient().fetch(url4, partial(_aur4_done, name, aurname, callback))
 
-def _aur_done(name, callback, res):
+def _aur4_done(name, aurname, callback, res):
+  if res.error:
+    raise res.error
+
+  data = json.loads(res.body.decode('utf-8'))
+
+  if not data['results']:
+    url = AUR_URL + url_escape(aurname)
+    AsyncHTTPClient().fetch(url, partial(_aur_done, name, aurname, callback))
+    return
+
+  version = data['results']['Version']
+  callback(name, version)
+
+def _aur_done(name, aurname, callback, res):
   if res.error:
     raise res.error