Merge branch 'fix/callback' into 'master'

Fix: callback and workers without metadata stream

See merge request !27

src/AsapoWorker/asapo_sender.py

@@ -179,6 +179,7 @@ class AsapoSender:
         self.producer.send_stream_finished_flag(stream=self.stream, last_id=last_id, next_stream=next_stream)
 
     def _callback(self, header, err):
+        header = {key: val for key, val in header.items() if key != 'data'}
         with self._lock:
             assert self._n_queued > 0
             self._n_queued -= 1

src/AsapoWorker/streamer.py

@@ -50,7 +50,8 @@ def get_new_stream(stream, receiver_stream_list, metadata_stream_list,
 
     receiver_stream_list = sorted(receiver_stream_list, key=lambda x: x['timestampCreated'])
     receiver_stream_list = [x['name'] for x in receiver_stream_list]
-    metadata_stream_list = [x['name'] for x in metadata_stream_list]
+    if isinstance(metadata_stream_list, list):
+        metadata_stream_list = [x['name'] for x in metadata_stream_list]
     if 'basename' in naming_scheme:
         if sender_stream_list is None:
             log.warning(