configurator: enable "rewindable_input" directive

This allows users to override the current Rack spec and disable
the rewindable input requirement.  This can allow applications
to use less I/O to minimize the performance impact when
processing uploads.

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/unicorn/http_server.rb b/lib/unicorn/http_server.rb
index 69b7cc8..f0dca7c 100644
--- a/lib/unicorn/http_server.rb
+++ b/lib/unicorn/http_server.rb
@@ -355,6 +355,15 @@ class Unicorn::HttpServer
     kill_each_worker(:KILL)
   end
 
+  def rewindable_input
+    Unicorn::HttpRequest.input_class.method_defined?(:rewind)
+  end
+
+  def rewindable_input=(bool)
+    Unicorn::HttpRequest.input_class = bool ?
+                                Unicorn::TeeInput : Unicorn::StreamInput
+  end
+
   private
 
   # wait for a signal hander to wake us up and then consume the pipe