From 8e7475ccf6805131ea089bc8b88994e4a1013ac1 Mon Sep 17 00:00:00 2001
From: Nikita Koshelev <nikita.koshelev@gmail.com>
Date: Sat, 18 Nov 2017 01:22:42 +0300
Subject: [PATCH] Added regex escaping for `Router.add()` version parameter

---
 sanic/router.py | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/sanic/router.py b/sanic/router.py
index b601622c..2ba3140c 100644
--- a/sanic/router.py
+++ b/sanic/router.py
@@ -119,10 +119,8 @@ class Router:
         :return: Nothing
         """
         if version is not None:
-            if uri.startswith('/'):
-                uri = "/".join(["/v{}".format(str(version)), uri[1:]])
-            else:
-                uri = "/".join(["/v{}".format(str(version)), uri])
+            version = re.escape(str(version))
+            uri = "/".join(["/v{}".format(version.strip('/')), uri.lstrip('/')])
         # add regular version
         self._add(uri, methods, handler, host, name)