[3.8] bpo-38449: Revert "bpo-22347: Update mimetypes.guess_type to allow oper parsing of URLs" (GH-16724) (GH-16728)

maxking · web-flow · commit 5a638a805503 · 2019-10-12T09:58:11.000-07:00
This reverts commit 87bd207. The reason for revert is a regression caused by the change in 3.8.0rc1, see bpo-38449 for more details. https://bugs.python.org/issue38449 (cherry picked from commit 19a3d87) Co-authored-by: Abhilash Raj <maxking@users.noreply.github.com>
diff --git a/Lib/mimetypes.py b/Lib/mimetypes.py
@@ -114,8 +114,7 @@ def guess_type(self, url, strict=True):
         but non-standard types.
         """
         url = os.fspath(url)
-        p = urllib.parse.urlparse(url)
-        scheme, url = p.scheme, p.path
+        scheme, url = urllib.parse._splittype(url)
         if scheme == 'data':
             # syntax of data URLs:
             # dataurl   := "data:" [ mediatype ] [ ";base64" ] "," data
diff --git a/Lib/test/test_mimetypes.py b/Lib/test/test_mimetypes.py
@@ -51,14 +51,6 @@ def test_non_standard_types(self):
         eq(self.db.guess_type('foo.xul', strict=False), ('text/xul', None))
         eq(self.db.guess_extension('image/jpg', strict=False), '.jpg')
 
-    def test_url(self):
-        result = self.db.guess_type('http://host.html')
-        msg = 'URL only has a host name, not a file'
-        self.assertSequenceEqual(result, (None, None), msg)
-        result = self.db.guess_type('http://example.com/host.html')
-        msg = 'Should be text/html'
-        self.assertSequenceEqual(result, ('text/html', None), msg)
-
     def test_guess_all_types(self):
         eq = self.assertEqual
         unless = self.assertTrue
diff --git a/Lib/test/test_urllib2.py b/Lib/test/test_urllib2.py
@@ -744,7 +744,7 @@ def connect_ftp(self, user, passwd, host, port, dirs,
              ["foo", "bar"], "", None),
             ("ftp://localhost/baz.gif;type=a",
              "localhost", ftplib.FTP_PORT, "", "", "A",
-             [], "baz.gif", "image/gif"),
+             [], "baz.gif", None),  # XXX really this should guess image/gif
             ]:
             req = Request(url)
             req.timeout = None
diff --git a/Misc/NEWS.d/next/Library/2019-10-11-18-49-00.bpo-38449.9TWMlz.rst b/Misc/NEWS.d/next/Library/2019-10-11-18-49-00.bpo-38449.9TWMlz.rst
@@ -0,0 +1,2 @@
+Revert GH-15522, which introduces a regression in
+:meth:`mimetypes.guess_type` due to improper handling of filenames as urls.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+Revert GH-15522, which introduces a regression in`
	`2`	+:meth:`mimetypes.guess_type` due to improper handling of filenames as urls.