gh-111741: Recognise image/webp as a standard format in the mimetypes module (GH-111742)

Previously it was supported as a non-standard type.

Author: Nachtalb

Lib/mimetypes.py

@@ -528,6 +528,7 @@ def _default_mime_types():
         '.tiff'   : 'image/tiff',
         '.tif'    : 'image/tiff',
         '.ico'    : 'image/vnd.microsoft.icon',
+        '.webp'   : 'image/webp',
         '.ras'    : 'image/x-cmu-raster',
         '.pnm'    : 'image/x-portable-anymap',
         '.pbm'    : 'image/x-portable-bitmap',
@@ -587,7 +588,6 @@ def _default_mime_types():
         '.pict': 'image/pict',
         '.pct' : 'image/pict',
         '.pic' : 'image/pict',
-        '.webp': 'image/webp',
         '.xul' : 'text/xul',
         }
 

Lib/test/test_mimetypes.py

@@ -96,14 +96,12 @@ def test_non_standard_types(self):
         # First try strict
         eq(self.db.guess_type('foo.xul', strict=True), (None, None))
         eq(self.db.guess_extension('image/jpg', strict=True), None)
-        eq(self.db.guess_extension('image/webp', strict=True), None)
         # And then non-strict
         eq(self.db.guess_type('foo.xul', strict=False), ('text/xul', None))
         eq(self.db.guess_type('foo.XUL', strict=False), ('text/xul', None))
         eq(self.db.guess_type('foo.invalid', strict=False), (None, None))
         eq(self.db.guess_extension('image/jpg', strict=False), '.jpg')
         eq(self.db.guess_extension('image/JPG', strict=False), '.jpg')
-        eq(self.db.guess_extension('image/webp', strict=False), '.webp')
 
     def test_filename_with_url_delimiters(self):
         # bpo-38449: URL delimiters cases should be handled also.
@@ -183,6 +181,7 @@ def check_extensions():
             self.assertEqual(mimetypes.guess_extension('application/xml'), '.xsl')
             self.assertEqual(mimetypes.guess_extension('audio/mpeg'), '.mp3')
             self.assertEqual(mimetypes.guess_extension('image/avif'), '.avif')
+            self.assertEqual(mimetypes.guess_extension('image/webp'), '.webp')
             self.assertEqual(mimetypes.guess_extension('image/jpeg'), '.jpg')
             self.assertEqual(mimetypes.guess_extension('image/tiff'), '.tiff')
             self.assertEqual(mimetypes.guess_extension('message/rfc822'), '.eml')

Misc/NEWS.d/next/Library/2023-11-04-22-32-27.gh-issue-111741.f1ufr8.rst

@@ -0,0 +1 @@
+Recognise ``image/webp`` as a standard format in the :mod:`mimetypes` module.