handle errors in json files

owrx/bands.py

@@ -57,6 +57,9 @@ class Bandplan(object):
                 return [Band(d) for d in bands_json]
             except FileNotFoundError:
                 pass
+            except json.JSONDecodeError:
+                logger.exception("error while parsing bandplan from %s", file)
+                return []
         return []
 
     def findBands(self, freq):

owrx/bookmarks.py

@@ -1,5 +1,9 @@
 import json
 
+import logging
+
+logger = logging.getLogger(__name__)
+
 
 class Bookmark(object):
     def __init__(self, j):
@@ -45,6 +49,9 @@ class Bookmarks(object):
                 return [Bookmark(d) for d in bookmarks_json]
             except FileNotFoundError:
                 pass
+            except json.JSONDecodeError:
+                logger.exception("error while parsing bookmarks from %s", file)
+                return []
         return []