Fix for issue1153027, making Py3k changes similar to fix in issue918368.

This will address:
a) urllib/ in py3k,
b) urllib in py2x is addressed by issue918368.
c) urllib2 in py2x was already addressed in Revision 43132.

Lib/nturl2path.py

@@ -56,7 +56,7 @@ def pathname2url(p):
 
     drive = urllib.parse.quote(comp[0].upper())
     components = comp[1].split('\\')
-    path = '///' + drive + '|'
+    path = '///' + drive + ':'
     for comp in components:
         if comp:
             path = path + '/' + urllib.parse.quote(comp)

Lib/test/test_urllib.py

@@ -837,6 +837,18 @@ class Utility_Tests(unittest.TestCase):
         self.assertEqual(('user', 'a\vb'),urllib.parse.splitpasswd('user:a\vb'))
         self.assertEqual(('user', 'a:b'),urllib.parse.splitpasswd('user:a:b'))
 
+
+class URLopener_Tests(unittest.TestCase):
+    """Testcase to test the open method of URLopener class."""
+
+    def test_quoted_open(self):
+        class DummyURLopener(urllib.request.URLopener):
+            def open_spam(self, url):
+                return url
+
+        self.assertEqual(DummyURLopener().open(
+            'spam://example/ /'),'//example/%20/')
+
 # Just commented them out.
 # Can't really tell why keep failing in windows and sparc.
 # Everywhere else they work ok, but on those machines, someteimes
@@ -928,6 +940,7 @@ def test_main():
         urlencode_Tests,
         Pathname_Tests,
         Utility_Tests,
+        URLopener_Tests,
         #FTPWrapperTests,
     )
 

Lib/urllib/request.py

@@ -1398,6 +1398,7 @@ class URLopener:
     def open(self, fullurl, data=None):
         """Use URLopener().open(file) instead of open(file, 'r')."""
         fullurl = unwrap(to_bytes(fullurl))
+        fullurl = quote(fullurl, safe="%/:=&?~#+!$,;'@()*[]")
         if self.tempcache and fullurl in self.tempcache:
             filename, headers = self.tempcache[fullurl]
             fp = open(filename, 'rb')