yum enable NO_PROXY (proxy=_none_)

python-urllib-noproxy.patch

diff --git a/urllib.py b/urllib.py
index 802d9b7..d13ddb7 100644
--- a/urllib.py
+++ b/urllib.py
@@ -35,7 +35,7 @@ __all__ = ["urlopen", "URLopener", "FancyURLopener", "urlretrieve",
            "localhost", "thishost", "ftperrors", "basejoin", "unwrap",
            "splittype", "splithost", "splituser", "splitpasswd", "splitport",
            "splitnport", "splitquery", "splitattr", "splitvalue",
-           "splitgophertype", "getproxies"]
+           "splitgophertype", "getproxies", "getnoproxies"]
 
 __version__ = '1.16'    # XXX This version is not always updated :-(
 
@@ -1355,6 +1355,18 @@ else:
     def proxy_bypass(host):
         return 0
 
+def getnoproxies_environment():
+    hosts = []
+    if 'no_proxy' in os.environ:
+        hosts = os.environ['no_proxy'].split(",")
+    elif 'NO_PROXY' in os.environ:
+        hosts = os.environ['NO_PROXY'].split(",")
+    hosts = map(lambda host:host.strip(), list(set(hosts)))
+    return hosts
+
+def getnoproxies():
+    return getnoproxies_environment()
+
 # Test and time quote() and unquote()
 def test1():
     s = ''
diff --git a/urllib2.py b/urllib2.py
index 4ac7a39..a37ecb0 100644
--- a/urllib2.py
+++ b/urllib2.py
@@ -118,7 +118,7 @@ from urllib import (unwrap, unquote, splittype, splithost,
      splitattr, ftpwrapper, noheaders, splituser, splitpasswd, splitvalue)
 
 # support for FileHandler, proxies via environment variables
-from urllib import localhost, url2pathname, getproxies
+from urllib import localhost, url2pathname, getproxies, getnoproxies
 
 __version__ = "2.4"
 
@@ -573,6 +573,8 @@ class ProxyHandler(BaseHandler):
                     lambda r, proxy=url, type=type, meth=self.proxy_open: \
                     meth(r, proxy, type))
 
+        self.noproxies = getnoproxies()
+
     def proxy_open(self, req, proxy, type):
         orig_type = req.get_type()
         type, r_type = splittype(proxy)
@@ -585,7 +587,18 @@ class ProxyHandler(BaseHandler):
                                                 unquote(password))).strip()
                 req.add_header('Proxy-authorization', 'Basic ' + user_pass)
         host = unquote(host)
-        req.set_proxy(host, type)
+
+        need_proxy = 1
+        if len(self.noproxies) > 0:
+            orig_host = req.get_host()
+            for domain in self.noproxies:
+                if orig_host.count(domain):
+                    need_proxy = 0
+                    break
+
+        if need_proxy == 1:
+            req.set_proxy(host, type)
+
         if orig_type == type:
             # let other handlers take care of it
             # XXX this only makes sense if the proxy is before the