From 19a3d873005e5730eeabdc394c961e93f2ec02f0 Mon Sep 17 00:00:00 2001
From: Abhilash Raj <maxking@users.noreply.github.com>
Date: Fri, 11 Oct 2019 22:41:35 -0700
Subject: [PATCH] bpo-38449: Revert "bpo-22347: Update mimetypes.guess_type to
 allow oper parsing of URLs (GH-15522)" (GH-16724)

This reverts commit 87bd2071c756188b6cd577889fb1682831142ceb.



https://bugs.python.org/issue38449
---
 Lib/mimetypes.py                                          | 3 +--
 Lib/test/test_mimetypes.py                                | 8 --------
 Lib/test/test_urllib2.py                                  | 2 +-
 .../next/Library/2019-08-27-01-03-26.bpo-22347._TRpYr.rst | 2 --
 .../next/Library/2019-10-11-18-49-00.bpo-38449.9TWMlz.rst | 2 ++
 5 files changed, 4 insertions(+), 13 deletions(-)
 delete mode 100644 Misc/NEWS.d/next/Library/2019-08-27-01-03-26.bpo-22347._TRpYr.rst
 create mode 100644 Misc/NEWS.d/next/Library/2019-10-11-18-49-00.bpo-38449.9TWMlz.rst

diff --git a/Lib/mimetypes.py b/Lib/mimetypes.py
index 9fdd6ebd634..9b42bf6dd2c 100644
--- a/Lib/mimetypes.py
+++ b/Lib/mimetypes.py
@@ -114,8 +114,7 @@ class MimeTypes:
         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
index 7761c3fe867..bfd5eeedaa7 100644
--- a/Lib/test/test_mimetypes.py
+++ b/Lib/test/test_mimetypes.py
@@ -51,14 +51,6 @@ class MimeTypesTestCase(unittest.TestCase):
         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
index 186a9676597..8abedaac985 100644
--- a/Lib/test/test_urllib2.py
+++ b/Lib/test/test_urllib2.py
@@ -742,7 +742,7 @@ class HandlerTests(unittest.TestCase):
              ["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/2019-08-27-01-03-26.bpo-22347._TRpYr.rst b/Misc/NEWS.d/next/Library/2019-08-27-01-03-26.bpo-22347._TRpYr.rst
deleted file mode 100644
index 1a3c1993821..00000000000
--- a/Misc/NEWS.d/next/Library/2019-08-27-01-03-26.bpo-22347._TRpYr.rst
+++ /dev/null
@@ -1,2 +0,0 @@
-Update mimetypes.guess_type to allow proper parsing of URLs with only a host name.
-Patch by Dong-hee Na.
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
new file mode 100644
index 00000000000..f7b1dbf8d89
--- /dev/null
+++ 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.