retry a few times on connection failure so the whole thing doesn't need to restart

titanium_backup_formatter.py

@@ -184,13 +184,19 @@ def _convert_url_to_base64_data(url):
         if url is not None:
             file_name = 'tmp/' + str(uuid.uuid4())
             os.makedirs(os.path.dirname(file_name), exist_ok=True)
-            with urllib.request.urlopen(url) as file:
-                data = file.read()
-                with open(file_name, "wb") as new_file:
-                    new_file.write(data)
-                    new_file.close()
-                    encoded_data = base64.b64encode(open(file_name, "rb").read()).decode('utf-8')
-                    os.remove(file_name)
+            for trynum in range(0,5):
+                try:
+                    with urllib.request.urlopen(url) as file:
+                        data = file.read()
+                        with open(file_name, "wb") as new_file:
+                            new_file.write(data)
+                            new_file.close()
+                            encoded_data = base64.b64encode(open(file_name, "rb").read()).decode('utf-8')
+                            os.remove(file_name)
+                    break
+                except urllib.request.URLError as err:
+                    print("Failed to complete request for: {} on try {} because of: {} Trying again".format(url, trynum, err))
+
         if encoded_data is None or len(encoded_data) <= 0:
             print("Error downloading or base64 encoding attachment!")
         return encoded_data