Merged revisions 82780 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r82780 | senthil.kumaran | 2010-07-11 08:42:43 +0530 (Sun, 11 Jul 2010) | 3 lines

  Stricter verification for file based url scheme and reliance on ftp protocol.
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diff --git a/Lib/urllib/request.py b/Lib/urllib/request.py
index e59208f..cb80a36 100644
--- a/Lib/urllib/request.py
+++ b/Lib/urllib/request.py
@@ -1188,7 +1188,8 @@
     # Use local file or FTP depending on form of URL
     def file_open(self, req):
         url = req.selector
-        if url[:2] == '//' and url[2:3] != '/':
+        if url[:2] == '//' and url[2:3] != '/' and (req.host and
+                req.host != 'localhost'):
             req.type = 'ftp'
             return self.parent.open(req)
         else: