Use a BodyProxy instead of including a Module that responds to close.

Closes #4441 if Active Record is disabled assets are delivered correctly

1 files changed, 28 insertions, 0 deletions

diff --git a/actionpack/lib/action_dispatch/middleware/body_proxy.rb b/actionpack/lib/action_dispatch/middleware/body_proxy.rb
new file mode 100644
index 0000000000..867afe3b48
--- /dev/null
+++ b/actionpack/lib/action_dispatch/middleware/body_proxy.rb
@@ -0,0 +1,28 @@
+# Keep this file meanwhile https://github.com/rack/rack/pull/313 is not released
+module ActionDispatch
+  class BodyProxy
+    def initialize(body, &block)
+      @body, @block, @closed = body, block, false
+    end
+
+    def respond_to?(*args)
+      super or @body.respond_to?(*args)
+    end
+
+    def close
+      return if @closed
+      @closed = true
+      @body.close if @body.respond_to? :close
+    ensure
+      @block.call
+    end
+
+    def closed?
+      @closed
+    end
+
+    def method_missing(*args, &block)
+      @body.__send__(*args, &block)
+    end
+  end
+end