Deluge handle network down (#701)

* return something useful if network is offline

* handle cases where connection is lost after being created

i3pystatus/deluge.py

@@ -1,6 +1,6 @@
 import time
 
-from deluge_client import DelugeRPCClient
+from deluge_client import DelugeRPCClient, FailedToReconnectException
 
 from i3pystatus import IntervalModule, logger
 from i3pystatus.core.util import bytes_info_dict
@@ -31,6 +31,7 @@ class Deluge(IntervalModule):
         ('username', 'username to authenticate with deluge'),
         ('password', 'password to authenticate to deluge'),
         ('path', 'override "download path" server-side when checking space used/free'),
+        ('offline_string', 'string to output while unable to connect to deluge daemon')
     )
     required = ('username', 'password')
 
@@ -39,6 +40,7 @@ class Deluge(IntervalModule):
     path = None
     libtorrent_stats = False
     rounding = 2
+    offline_string = 'offline'
 
     format = '⛆{num_torrents} ✇{free_space_bytes}'
 
@@ -50,18 +52,27 @@ class Deluge(IntervalModule):
 
     def run(self):
         if not self.client.connected:
-            self.client.connect()
+            try:
+                self.client.connect()
+            except OSError:
+                self.output = {
+                    'full_text': self.offline_string
+                }
+                return
 
-        self.data = self.get_session_statistics()
+        try:
+            self.data = self.get_session_statistics()
 
-        torrents = self.get_torrents_status()
-        if torrents:
-            self.data['num_torrents'] = len(torrents)
+            torrents = self.get_torrents_status()
+            if torrents:
+                self.data['num_torrents'] = len(torrents)
 
-        if 'free_space_bytes' in self.format:
-            self.data['free_space_bytes'] = self.get_free_space(self.path)
-        if 'used_space_bytes' in self.format:
-            self.data['used_space_bytes'] = self.get_path_size(self.path)
+            if 'free_space_bytes' in self.format:
+                self.data['free_space_bytes'] = self.get_free_space(self.path)
+            if 'used_space_bytes' in self.format:
+                self.data['used_space_bytes'] = self.get_path_size(self.path)
+        except FailedToReconnectException:
+            return
 
         self.parse_values(self.data)