From 419c64b107896628a159f558abdb298117249b9a Mon Sep 17 00:00:00 2001
From: Philipp Hagemeister <phihag@phihag.de>
Date: Mon, 13 May 2013 19:54:07 +0200
Subject: [PATCH] Throw a better error if the protocol is invalid

---
 youtube_dl/InfoExtractors.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/youtube_dl/InfoExtractors.py b/youtube_dl/InfoExtractors.py
index ce959a6df..6d6203a1c 100755
--- a/youtube_dl/InfoExtractors.py
+++ b/youtube_dl/InfoExtractors.py
@@ -1304,6 +1304,8 @@ def http_error_405(self, req, fp, code, msg, headers):
             opener.add_handler(handler())
 
         response = opener.open(HeadRequest(url))
+        if response is None:
+            raise ExtractorError(u'Invalid URL protocol')
         new_url = response.geturl()
 
         if url == new_url: