[DL Streamer Pipeline Server] Bugfix: appsink destination and publisher configuration (open-edge-platform#197)

Author: Aditya-sonii

microservices/dlstreamer-pipeline-server/src/publisher/publisher.py

@@ -190,13 +190,11 @@ def _get_publishers(self):
             if re.search(pattern, launch_string):
                 self.log.info("appsink destination found. Publisher will be initialized")
                 # identify DLStreamer pipeline server publishers and pop them from the request
-                if self.request is not None:
+                if self.request is not None and "destination" in self.request:
                     frame_destination = copy.deepcopy(self.request.get("destination").get("frame", None))
                     meta_destination = copy.deepcopy(self.request.get("destination").get("metadata", None))
-                    if frame_destination:
-                        self._get_frame_publisher_config(frame_destination)
-                    if meta_destination:
-                        self._get_meta_publisher_config(meta_destination)
+                    self._get_frame_publisher_config(frame_destination)
+                    self._get_meta_publisher_config(meta_destination)
                     if not self.request["destination"]:
                         self.request.pop("destination")
 
@@ -636,4 +634,4 @@ def _add_s3_metadata(self, meta_data: Dict[str, str], s3_cfg: Dict[str, str]) ->
                 'key': s3_cfg.get('folder_prefix', "dlstreamer_pipeline_server")+f"/{meta_data['img_handle']}"+ext,
             }
         }
-        return s3_metadata
+        return s3_metadata