debug headers

Author: nhsdevws

.gitignore

@@ -30,3 +30,4 @@ openapi.json
 
 devtools/volume/
 **/.coverage
+backend/src/1.json

backend/src/fhir_controller.py

@@ -669,9 +669,9 @@ def create_response(status_code, body=None, headers=None):
     @staticmethod
     def _identify_supplier_system(aws_event):
         logger.info("SAW: fhir_controller. _identify_supplier_system...1")
-
-        logger.info("SAW: aws_event=%s", aws_event)
-        supplier_system = aws_event["headers"]["SupplierSystem"]
+        headers = aws_event.get("headers", {})
+        logger.info("SAW: headers=%s", headers)
+        supplier_system = headers.get("SupplierSystem")
         if not supplier_system:
             raise UnauthorizedError("SupplierSystem header is missing")
         return supplier_system