Repro case for Ruby 2.0 Content-Disposition: gzip handling

app.rb

require 'sinatra'
require 'zlib'

configure do
  set :server, :puma
end

get '/text' do
  body File.read("text")
end

get '/text.gz' do
  body File.read("text.gz")
end

get '/z/text' do
  gzip_body File.read("text")
end

get '/z/text.gz' do
  gzip_body File.read("text.gz")
end

def gzip_body(body)
  headers['Content-Encoding'] = 'gzip'
  io = StringIO.new
  gz = Zlib::GzipWriter.new(io)
  begin
    gz.write(body)
  ensure
    gz.close
  end
  body(io.string)
end

test.rb

# run ruby app.rb first so that this can run against it

require 'net/http'

def get(url)
  Net::HTTP.new("localhost", 4567).request(Net::HTTP::Get.new(url)).body
end

urls = %w(/text /text.gz /z/text /z/text.gz)
urls.each do |url|
  puts "requesting #{url}: #{get(url)}"
end