From 0ff648adb6fabe9afcbc924ad3b0ee91e89c2c37 Mon Sep 17 00:00:00 2001
From: Brian Kassouf <briankassouf@users.noreply.github.com>
Date: Thu, 31 May 2018 12:52:43 -0700
Subject: [PATCH] UI: Trim trailing slashes to avoid redirects (#4668)

---
 http/handler.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/http/handler.go b/http/handler.go
index accb78dea0..f7d6437bb2 100644
--- a/http/handler.go
+++ b/http/handler.go
@@ -273,6 +273,11 @@ func handleUIHeaders(core *vault.Core, h http.Handler) http.Handler {
 
 func handleUI(h http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+
+		// The fileserver handler strips trailing slashes and does a redirect.
+		// We don't want the redirect to happen so we preemptively trim the slash
+		// here.
+		req.URL.Path = strings.TrimSuffix(req.URL.Path, "/")
 		h.ServeHTTP(w, req)
 		return
 	})