Appsignal::Rack::ArrayableBodyWrapper does not respond to `body`

[coorasse]

Describe the bug

In our custom middleware, we check if the body (which is an instance of Rack::BodyProxy) responds to body to retrieve the actual body content. After enabling the Appsignal middleware, the Rack::BodyProxy still responds to body, but wraps a Appsignal::Rack::ArrayableBodyWrapper which does not. Causing the call to crash with :

/opt/ruby/vista/shared/bundle/ruby/3.3.0/gems/rack-3.1.7/lib/rack/body_proxy.rb:56:in `method_missing': undefined method `body' for an instance of Appsignal::Rack::ArrayableBodyWrapper (NoMethodError)

        @body.__send__(method_name, *args, &block)
             ^^^^^^^^^

To Reproduce

Steps to reproduce the behavior:

• Using AppSignal for Ruby gem version 4.x
• In my app using Rails 7.1, ruby 3.3

[tombruijn]

Thanks for the report! I shipped a fix in Ruby gem 4.0.4.

[coorasse]

Amazing! Thanks!