NoMethodError: undefined method `any?' for #ActionDispatch::Response::RackBody

[brahamshakti]

Hi this is my config.ru file

require 'rack'
require 'prometheus/middleware/collector'
require 'prometheus/middleware/exporter'

use Rack::Deflater, if: ->(_, _, _, body) { body.any? && body[0].length > 512 }
use Prometheus::Middleware::Collector
use Prometheus::Middleware::Exporter

run Rails.application

But when I am throwing :not_found error using return head :not_found unless user it gives me

#<NoMethodError: undefined method `any?' for #ActionDispatch::Response::RackBody:0x00000003c657c0>>
/home/user/.rvm/gems/ruby-2.3.3/gems/rack-2.0.3/lib/rack/body_proxy.rb:41:in `method_missing'
/home/user/.rvm/gems/ruby-2.3.3/gems/rack-2.0.3/lib/rack/body_proxy.rb:41:in `method_missing'
/home/user/.rvm/gems/ruby-2.3.3/gems/rack-2.0.3/lib/rack/body_proxy.rb:41:in `method_missing'
/home/user/.rvm/gems/ruby-2.3.3/gems/rack-2.0.3/lib/rack/body_proxy.rb:41:in `method_missing'
/home/user/api/config.ru:5:in `block (2 levels) in <main>'
/home/user/.rvm/gems/ruby-2.3.3/gems/rack-2.0.3/lib/rack/deflater.rb:114:in `should_deflate?' 
/home/user/.rvm/gems/ruby-2.3.3/gems/rack-2.0.3/lib/rack/deflater.rb:37:in `call'
/home/user/.rvm/gems/ruby-2.3.3/gems/puma-3.8.2/lib/puma/configuration.rb:224:in `call'
/home/user/.rvm/gems/ruby-2.3.3/gems/puma-3.8.2/lib/puma/server.rb:600:in `handle_request'
/home/user/.rvm/gems/ruby-2.3.3/gems/puma-3.8.2/lib/puma/server.rb:435:in `process_client' 
/home/user/.rvm/gems/ruby-2.3.3/gems/puma-3.8.2/lib/puma/server.rb:299:in `block in run'
/home/user/.rvm/gems/ruby-2.3.3/gems/puma-3.8.2/lib/puma/thread_pool.rb:120:in `block in spawn_thread'`

[grobie]

Thanks for the report, it seems rack has changed the interface. As a workaround, just remove the if guard and just always use gzip even for small responses.