Merge pull request #93 from sapcc/binary_data_fix

avoid binary issue with barbican payload endpoint

auditmiddleware/_api.py

@@ -381,10 +381,16 @@ def _create_events(self, target_project, res_id,
         events = []
 
         # Check if the response has a JSON body
-        has_json_body = (response and
-            (response.content_length or 0) > 0 and
-            response.text and  # Check if response body is not empty
-            response.content_type == "application/json")
+        has_json_body = False
+        if response and (response.content_length or 0) > 0:
+            if response.content_type == "application/json":
+                try:
+                    # Attempt to access response.text
+                    response.text
+                    has_json_body = True
+                except UnicodeDecodeError:
+                    # If we can't decode the text, it's not JSON
+                    has_json_body = False
 
         # check for update operations (POST, PUT, PATCH)
         if request.method[0] == 'P' and has_json_body: