add optional extensions to GraphQLHTTPResponse

RELEASE.md

@@ -0,0 +1,5 @@
+Release type: minor
+
+This release adds an extensions field to the `GraphQLHTTPResponse` type and also exposes it in the view's response.
+
+This field gets populated by Strawberry extensions: https://strawberry.rocks/docs/guides/extensions#get-results

strawberry/http.py

@@ -10,12 +10,15 @@
 class GraphQLHTTPResponse(TypedDict, total=False):
     data: Optional[Dict[str, Any]]
     errors: Optional[List[Any]]
+    extensions: Optional[Dict[str, Any]]
 
 
 def process_result(result: ExecutionResult) -> GraphQLHTTPResponse:
     data: GraphQLHTTPResponse = {"data": result.data}
 
     if result.errors:
         data["errors"] = [format_graphql_error(err) for err in result.errors]
+    if result.extensions:
+        data["extensions"] = result.extensions
 
     return data

tests/django/test_extensions.py

@@ -0,0 +1,35 @@
+import json
+
+from django.test.client import RequestFactory
+
+import strawberry
+from strawberry.django.views import GraphQLView
+from strawberry.extensions import Extension
+
+
+class MyExtension(Extension):
+    def get_results(self):
+        return {"example": "example"}
+
+
+@strawberry.type
+class Query:
+    hello: str = "strawberry"
+
+
+schema = strawberry.Schema(query=Query, extensions=[MyExtension])
+
+
+def test_extensions():
+    query = "{ hello }"
+
+    factory = RequestFactory()
+    request = factory.post(
+        "/graphql/", {"query": query}, content_type="application/json"
+    )
+
+    response = GraphQLView.as_view(schema=schema)(request)
+    data = json.loads(response.content.decode())
+
+    assert response["content-type"] == "application/json"
+    assert data["extensions"]["example"] == "example"