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-rw-r--r--actionpack/lib/action_dispatch/middleware/closed_error.rb7
1 files changed, 7 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/closed_error.rb b/actionpack/lib/action_dispatch/middleware/closed_error.rb
new file mode 100644
index 0000000000..0a4db47f4b
--- /dev/null
+++ b/actionpack/lib/action_dispatch/middleware/closed_error.rb
@@ -0,0 +1,7 @@
+module ActionDispatch
+ class ClosedError < StandardError #:nodoc:
+ def initialize(kind)
+ super "Cannot modify #{kind} because it was closed. This means it was already streamed back to the client or converted to HTTP headers."
+ end
+ end
+end