X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;ds=sidebyside;f=youtube_dl%2Futils.py;h=29cafd8f05397f82777e114f8429bd78c15e0387;hb=b65e3b0636c4b992f3187bff7d5268c6891023a6;hp=b8700efcbd6860c74e5a96b5ed7790aaa26fbd94;hpb=e9c671d5e86e43785382ae9cb20c8e7676c7c9bf;p=youtube-dl

diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index b8700efcb..29cafd8f0 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -1866,6 +1866,13 @@ def strip_or_none(v):
     return None if v is None else v.strip()
 
 
+def url_or_none(url):
+    if not url or not isinstance(url, compat_str):
+        return None
+    url = url.strip()
+    return url if re.match(r'^(?:[a-zA-Z][\da-zA-Z.+-]*:)?//', url) else None
+
+
 def parse_duration(s):
     if not isinstance(s, compat_basestring):
         return None
@@ -3562,7 +3569,7 @@ class PerRequestProxyHandler(compat_urllib_request.ProxyHandler):
             setattr(self, '%s_open' % type,
                     lambda r, proxy='__noproxy__', type=type, meth=self.proxy_open:
                         meth(r, proxy, type))
-        return compat_urllib_request.ProxyHandler.__init__(self, proxies)
+        compat_urllib_request.ProxyHandler.__init__(self, proxies)
 
     def proxy_open(self, req, proxy, type):
         req_proxy = req.headers.get('Ytdl-request-proxy')