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Support underscores (in addition to hyphens) for charset detection. (#10410)
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changelog.d/10410.bugfix
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changelog.d/10410.bugfix
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Improve character set detection in URL previews by supporting underscores (in addition to hyphens). Contributed by @srividyut.
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@ -58,9 +58,11 @@ if TYPE_CHECKING:
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logger = logging.getLogger(__name__)
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_charset_match = re.compile(br'<\s*meta[^>]*charset\s*=\s*"?([a-z0-9-]+)"?', flags=re.I)
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_charset_match = re.compile(
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br'<\s*meta[^>]*charset\s*=\s*"?([a-z0-9_-]+)"?', flags=re.I
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)
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_xml_encoding_match = re.compile(
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br'\s*<\s*\?\s*xml[^>]*encoding="([a-z0-9-]+)"', flags=re.I
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br'\s*<\s*\?\s*xml[^>]*encoding="([a-z0-9_-]+)"', flags=re.I
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)
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_content_type_match = re.compile(r'.*; *charset="?(.*?)"?(;|$)', flags=re.I)
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@ -325,6 +325,19 @@ class MediaEncodingTestCase(unittest.TestCase):
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)
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self.assertEqual(encoding, "ascii")
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def test_meta_charset_underscores(self):
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"""A character encoding contains underscore."""
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encoding = get_html_media_encoding(
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b"""
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<html>
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<head><meta charset="Shift_JIS">
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</head>
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</html>
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""",
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"text/html",
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)
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self.assertEqual(encoding, "Shift_JIS")
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def test_xml_encoding(self):
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"""A character encoding is found via the meta tag."""
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encoding = get_html_media_encoding(
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