From 2ef16328e82ae9b9715251e41b8abf4b95ae6f20 Mon Sep 17 00:00:00 2001
From: Senthil Kumaran <orsenthil@gmail.com>
Date: Sun, 11 Jul 2010 03:12:43 +0000
Subject: [PATCH] Stricter verification for file based url scheme and reliance
 on ftp protocol.

---
 Lib/test/test_urllib2.py | 3 +++
 Lib/urllib/request.py    | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Lib/test/test_urllib2.py b/Lib/test/test_urllib2.py
index 080daa4f273..4d117c73197 100644
--- a/Lib/test/test_urllib2.py
+++ b/Lib/test/test_urllib2.py
@@ -731,6 +731,8 @@ class HandlerTests(unittest.TestCase):
             ("file://ftp.example.com///foo.txt", False),
 # XXXX bug: fails with OSError, should be URLError
             ("file://ftp.example.com/foo.txt", False),
+            ("file://somehost//foo/something.txt", True),
+            ("file://localhost//foo/something.txt", False),
             ]:
             req = Request(url)
             try:
@@ -741,6 +743,7 @@ class HandlerTests(unittest.TestCase):
             else:
                 self.assertTrue(o.req is req)
                 self.assertEqual(req.type, "ftp")
+            self.assertEqual(req.type is "ftp", ftp)
 
     def test_http(self):
 
diff --git a/Lib/urllib/request.py b/Lib/urllib/request.py
index f7c7416f34c..c6767d0b266 100644
--- a/Lib/urllib/request.py
+++ b/Lib/urllib/request.py
@@ -1188,7 +1188,8 @@ class FileHandler(BaseHandler):
     # 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: