The socket module now always uses the _socketobject wrapper class, even on

platforms which have dup(2).  The makefile() method is built directly on top
of the socket without duplicating the file descriptor, allowing timeouts to
work properly.  Includes a new test case (urllibnet) which requires the
network resource.

Closes bug 707074.

Lib/socket.py

@@ -59,13 +59,10 @@ if _have_ssl:
     __all__.extend(os._get_exports_list(_ssl))
 
 _realsocket = socket
-_needwrapper = False
 if (sys.platform.lower().startswith("win")
     or (hasattr(os, 'uname') and os.uname()[0] == "BeOS")
     or sys.platform=="riscos"):
 
-    _needwrapper = True
-
     if _have_ssl:
         _realssl = ssl
         def ssl(sock, keyfile=None, certfile=None):
@@ -180,8 +177,7 @@ class _socketobject(object):
         exec _s % (_m, _m, _m, _m)
     del _m, _s
 
-if _needwrapper:
-    socket = SocketType = _socketobject
+socket = SocketType = _socketobject
 
 class _fileobject(object):
     """Faux file object attached to a socket object."""

Lib/test/test_urllibnet.py

+#!/usr/bin/env python
+
+import unittest
+from test import test_support
+
+import socket
+import urllib2
+import sys
+
+class URLTimeoutTest(unittest.TestCase):
+
+    TIMEOUT = 10.0
+
+    def setUp(self):
+        socket.setdefaulttimeout(self.TIMEOUT)
+
+    def tearDown(self):
+        socket.setdefaulttimeout(None)
+
+    def testURLread(self):
+        f = urllib2.urlopen("http://www.python.org/")
+        x = f.read()
+
+def test_main():
+    test_support.requires('network')
+
+    suite = unittest.TestSuite()
+    suite.addTest(unittest.makeSuite(URLTimeoutTest))
+    test_support.run_suite(suite)
+
+if __name__ == "__main__":
+    test_main()

Misc/NEWS

@@ -59,6 +59,11 @@ Extension modules
   Subsumed the times() function into repeat().
   Added chain() and cycle().
 
+- The socket module now always uses the _socketobject wrapper class, even on
+  platforms which have dup(2).  The makefile() method is built directly
+  on top of the socket without duplicating the file descriptor, allowing
+  timeouts to work properly.
+
 Library
 -------