Catch error 502 bad status

Just in case server restarts in the middle of everything, let's retry.

resources/lib/artwork.py

@@ -374,7 +374,7 @@ class Artwork(object):
 
         if not image_url:
 
-            log.warn("empty url for: %s/%s", kodi_id, media_type)
+            log.debug("empty url for: %s/%s/%s", kodi_id, media_type, image_type)
             return
 
         cache_image = False

resources/lib/emby.py

@@ -19,7 +19,7 @@ import xbmc
 
 import downloadutils
 import database
-from utils import window, settings
+from utils import window, settings, should_stop
 from contextlib import closing
 
 #################################################################################################
@@ -56,12 +56,15 @@ def _http(action, url, request={}):
             return do.downloadUrl(url, action_type=action, parameters=request['params'])
         except downloadutils.HTTPException as error:
 
-            if error.status is None:
+            if error.status is None or error.status == 502:
                 while True:
 
                     if xbmc.Monitor().waitForAbort(15):
                         raise
 
+                    if should_stop():
+                        raise
+
                     if window('emby_online') == "true":
                         log.info("Retrying http query...")
                         break

resources/lib/read_embyserver.py

@@ -577,7 +577,7 @@ class Read_EmbyServer():
         try:
             users = self.doUtils.downloadUrl(url, authenticate=False)
         except Exception as error:
-            log.info("Error getting users from server: " + str(error))
+            log.info("Error getting users from server: %s", str(error))
             users = []
 
         return users