Fix compatibility with rack 3

.github/workflows/test.yml

@@ -9,6 +9,10 @@ jobs:
     strategy:
       matrix:
         ruby: [ '3.0', '3.1', '3.2', '3.3', jruby, truffleruby ]
+        rack: [ '2', '3' ]
+
+    env:
+      RACK_VERSION: ${{ matrix.rack }}
 
     steps:
     - uses: actions/checkout@v4

Gemfile

@@ -4,4 +4,4 @@ gem 'rspec-core', '~> 3'
 gem 'rspec-expectations', '~> 3'
 gem 'i18n', '>= 0.9'
 gem 'mime-types'
-gem 'rack', '~> 2'
+gem 'rack', "~> #{ENV['RACK_VERSION'] || '3'}"

lib/formeze.rb

@@ -240,7 +240,9 @@ def env_table
     end
 
     def stdinput
-      @options[:request].body
+      @options[:request].body.tap do |body|
+        body.rewind if body.respond_to?(:rewind)
+      end
     end
   end
 

spec/formeze_spec.rb

@@ -763,7 +763,7 @@ def multipart_request(body)
       input: body
     })
 
-    Rack::Request.new(env)
+    Rack::Request.new(env).tap(&:params)
   end
 
   context 'after parsing multipart input' do