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hansott
approved these changes
Oct 27, 2026
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Parsing the request body in Rack and Rails consumes
rack.inputand caches the result onenv. On Rack 3.2 and later, a body replaced by a later middleware is ignored and the application uses the result cached by Zen.This change first makes
rack.inputrewindable if it is not already, then parses a copy ofenvand rewindsrack.input, to ensure thatenvdoes not have a cached result and the application can still read the full request body.