v0.2 Preview: Construction Plan.

backend/common/middleware.py

@@ -0,0 +1,19 @@
+import uuid
+
+from .logging import request_id_context
+
+
+class RequestIDMiddleware:
+    def __init__(self, get_response):
+        self.get_response = get_response
+
+    def __call__(self, request):
+        request_id = request.headers.get("X-Request-ID") or str(uuid.uuid4())
+        request.request_id = request_id
+        token = request_id_context.set(request_id)
+        try:
+            response = self.get_response(request)
+            response["X-Request-ID"] = request_id
+            return response
+        finally:
+            request_id_context.reset(token)