Increased debug info

app.py

@@ -105,6 +105,10 @@ def upload_file() -> UploadFileResponse:
     tid = date.strftime('[%s] ')
     app.logger.info(tid + "Requested file upload")
 
+    app.logger.debug(tid + "The request contains the following headers: ", request.headers.keys())
+    app.logger.debug(tid + "The request contains the following args: ", request.args.keys())
+    app.logger.debug(tid + "The request contains the following files: ", request.files.keys())
+
     # Authenticate using the provided token
     provided_secret = request.headers.get('Authorization')
     if not provided_secret or provided_secret != f"Bearer {endpoint_secret}":
@@ -124,10 +128,13 @@ def upload_file() -> UploadFileResponse:
         abort(400, 'Please provide \'repo_full_name\' query parameter.')
 
     # Receive the file from the client as a stream
+    if 'file' not in request.files:
+        app.logger.error(tid + "Aborted 400 - \'file\' attachment not found")
+        abort(400, 'Please provide the RDF\\XML attachment into \'file\' form field.')
     file_stream = request.files['file'].stream
     file_name = request.files['file'].filename
     if not file_stream:
-        app.logger.error(tid + "Aborted 400 - \'file\' attachment not found")
+        app.logger.error(tid + "Aborted 400 - \'file\' attachment not a filestream")
         abort(400, 'Please provide a valid \'file\' attachment in RDF\\XML format.')
 
     app.logger.info(tid + f"{file_name} will be pushed into {repo_full_name} for vocabulary {vocabulary_name}")