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-rw-r--r--actionpack/lib/action_dispatch/http/response.rb7
1 files changed, 7 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/http/response.rb b/actionpack/lib/action_dispatch/http/response.rb
index 9b11111a67..b426d272f2 100644
--- a/actionpack/lib/action_dispatch/http/response.rb
+++ b/actionpack/lib/action_dispatch/http/response.rb
@@ -412,6 +412,13 @@ module ActionDispatch # :nodoc:
end
def before_sending
+ # Normally we've already committed by now, but it's possible
+ # (e.g., if the controller action tries to read back its own
+ # response) to get here before that. In that case, we must force
+ # an "early" commit: we're about to freeze the headers, so this is
+ # our last chance.
+ commit! unless committed?
+
headers.freeze
request.commit_cookie_jar! unless committed?
end