Add Rack::RewindableInput::Middleware

This will automatically wrap rack.input with Rack::RewindableInput,
for compatibility with middleware and applications that expect
rewindable input.

Related to #1148, but this does not contain any SPEC changes. It's
possible for servers targetting Rack 2 compatibility to use this
middleware to implement the compatibility.

1 files changed, 9 insertions, 0 deletions

diff --git a/test/spec_rewindable_input.rb b/test/spec_rewindable_input.rb
index 5c1bf5c9..e672bcbb 100644
--- a/test/spec_rewindable_input.rb
+++ b/test/spec_rewindable_input.rb
@@ -155,3 +155,12 @@ describe Rack::RewindableInput do
     include RewindableTest
   end
 end
+
+describe Rack::RewindableInput::Middleware do
+  it "wraps rack.input in RewindableInput" do
+    app = proc{|env| [200, {}, [env['rack.input'].class.to_s]]}
+    app.call('rack.input'=>StringIO.new(''))[2].must_equal ['StringIO']
+    app = Rack::RewindableInput::Middleware.new(app)
+    app.call('rack.input'=>StringIO.new(''))[2].must_equal ['Rack::RewindableInput']
+  end
+end