Make sure the HTTP socket is closed
when the urlopen() response object is closed
--- /lib/python3.3/urllib/request.py	2013-12-06 12:19:39.497101991 +0000
+++ /lib/python3.3/urllib/request.py	2013-12-06 12:15:51.926917269 +0000
@@ -1245,12 +1245,19 @@ class AbstractHTTPHandler(BaseHandler):
             h.set_tunnel(req._tunnel_host, headers=tunnel_headers)
 
         try:
-            h.request(req.get_method(), req.selector, req.data, headers)
-        except socket.error as err: # timeout error
-            h.close()
-            raise URLError(err)
-        else:
+            try:
+                h.request(req.get_method(), req.selector, req.data, headers)
+            except socket.error as err: # timeout error
+                raise URLError(err)
             r = h.getresponse()
+        except:
+            h.close()
+            raise
+        # Explicitly close the original socket object now
+        # to guarantee that the connection closes
+        # when the response closes its socket.makefile() object
+        if h.sock:
+            h.sock.close()
 
         r.url = req.get_full_url()
         # This line replaces the .msg attribute of the HTTPResponse
--- /lib/python3.3/test/test_urllib2.py	2013-12-06 12:21:23.378709619 +0000
+++ /lib/python3.3/test/test_urllib2.py	2013-12-06 12:01:38.850391435 +0000
@@ -284,6 +285,7 @@ class MockHTTPClass:
         self.data = None
         self.raise_on_endheaders = False
         self._tunnel_headers = {}
+        self.sock = None
 
     def __call__(self, host, timeout=socket._GLOBAL_DEFAULT_TIMEOUT):
         self.host = host