From 80f72638ce727072116ec97c3c4e1daaa7da6bb4 Mon Sep 17 00:00:00 2001
From: Alfonso Acosta <fons@weave.works>
Date: Thu, 9 Jun 2016 14:30:49 +0000
Subject: [PATCH] Add Indentity middleware

---
 common/middleware/middleware.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/middleware/middleware.go b/common/middleware/middleware.go
index 8c1574b38..ad8925ac8 100644
--- a/common/middleware/middleware.go
+++ b/common/middleware/middleware.go
@@ -18,6 +18,9 @@ func (m Func) Wrap(next http.Handler) http.Handler {
 	return m(next)
 }
 
+// Identity is an Interface which doesn't do anything.
+var Identity Interface = Func(func(h http.Handler) http.Handler { return h })
+
 // Merge produces a middleware that applies multiple middlesware in turn;
 // ie Merge(f,g,h).Wrap(handler) == f.Wrap(g.Wrap(h.Wrap(handler)))
 func Merge(middlesware ...Interface) Interface {