Index: Lib/urllib/request.py
===================================================================
--- Lib/urllib/request.py	(revision 69446)
+++ Lib/urllib/request.py	(working copy)
@@ -1064,8 +1064,16 @@
         headers["Connection"] = "close"
         headers = dict(
             (name.title(), val) for name, val in headers.items())
+        selector =  req.get_selector()
+
+        # Handle non-ascii paths
         try:
-            h.request(req.get_method(), req.get_selector(), req.data, headers)
+            selector.encode("ascii")
+        except UnicodeEncodeError:
+            selector = quote(selector)
+
+        try:
+            h.request(req.get_method(), selector, req.data, headers)
             r = h.getresponse()
         except socket.error as err: # XXX what error?
             raise URLError(err)