bpo-36948: Fix NameError in urllib.request.URLopener.retrieve (GH-13389)

Lib/test/test_urllib.py

@@ -1445,7 +1445,7 @@ class Utility_Tests(unittest.TestCase):
         self.assertIsInstance(urllib.request.thishost(), tuple)
 
 
-class URLopener_Tests(unittest.TestCase):
+class URLopener_Tests(FakeHTTPMixin, unittest.TestCase):
     """Testcase to test the open method of URLopener class."""
 
     def test_quoted_open(self):
@@ -1463,6 +1463,24 @@ class URLopener_Tests(unittest.TestCase):
                 "spam://c:|windows%/:=&?~#+!$,;'@()*[]|/path/"),
                 "//c:|windows%/:=&?~#+!$,;'@()*[]|/path/")
 
+    @support.ignore_warnings(category=DeprecationWarning)
+    def test_urlopener_retrieve_file(self):
+        with support.temp_dir() as tmpdir:
+            fd, tmpfile = tempfile.mkstemp(dir=tmpdir)
+            os.close(fd)
+            fileurl = "file:" + urllib.request.pathname2url(tmpfile)
+            filename, _ = urllib.request.URLopener().retrieve(fileurl)
+            self.assertEqual(filename, tmpfile)
+
+    @support.ignore_warnings(category=DeprecationWarning)
+    def test_urlopener_retrieve_remote(self):
+        url = "http://www.python.org/file.txt"
+        self.fakehttp(b"HTTP/1.1 200 OK\r\n\r\nHello!")
+        self.addCleanup(self.unfakehttp)
+        filename, _ = urllib.request.URLopener().retrieve(url)
+        self.assertEqual(os.path.splitext(filename)[1], ".txt")
+
+
 # Just commented them out.
 # Can't really tell why keep failing in windows and sparc.
 # Everywhere else they work ok, but on those machines, sometimes

Lib/urllib/request.py

@@ -1783,7 +1783,7 @@ class URLopener:
                 fp = self.open_local_file(url1)
                 hdrs = fp.info()
                 fp.close()
-                return url2pathname(splithost(url1)[1]), hdrs
+                return url2pathname(_splithost(url1)[1]), hdrs
             except OSError as msg:
                 pass
         fp = self.open(url, data)
@@ -1792,10 +1792,10 @@ class URLopener:
             if filename:
                 tfp = open(filename, 'wb')
             else:
-                garbage, path = splittype(url)
-                garbage, path = splithost(path or "")
-                path, garbage = splitquery(path or "")
-                path, garbage = splitattr(path or "")
+                garbage, path = _splittype(url)
+                garbage, path = _splithost(path or "")
+                path, garbage = _splitquery(path or "")
+                path, garbage = _splitattr(path or "")
                 suffix = os.path.splitext(path)[1]
                 (fd, filename) = tempfile.mkstemp(suffix)
                 self.__tempfiles.append(filename)

Misc/NEWS.d/next/Library/2019-05-17-21-42-58.bpo-36948.vnUDvk.rst

@@ -0,0 +1,2 @@
+Fix :exc:`NameError` in :meth:`urllib.request.URLopener.retrieve`. Patch by
+Karthikeyan Singaravelan.