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gh-95087: Fix IndexError in parsing invalid date in the email module (GH-95201)
Co-authored-by: wouter bolsterlee <wouter@bolsterl.ee>
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@ -95,6 +95,8 @@ def _parsedate_tz(data):
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return None
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data = data[:5]
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[dd, mm, yy, tm, tz] = data
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if not (dd and mm and yy):
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return None
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mm = mm.lower()
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if mm not in _monthnames:
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dd, mm = mm, dd.lower()
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@ -110,6 +112,8 @@ def _parsedate_tz(data):
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yy, tm = tm, yy
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if yy[-1] == ',':
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yy = yy[:-1]
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if not yy:
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return None
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if not yy[0].isdigit():
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yy, tz = tz, yy
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if tm[-1] == ',':
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@ -3047,33 +3047,43 @@ def test_formatdate_usegmt(self):
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# parsedate and parsedate_tz will become deprecated interfaces someday
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def test_parsedate_returns_None_for_invalid_strings(self):
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self.assertIsNone(utils.parsedate(''))
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self.assertIsNone(utils.parsedate_tz(''))
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self.assertIsNone(utils.parsedate(' '))
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self.assertIsNone(utils.parsedate_tz(' '))
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self.assertIsNone(utils.parsedate('0'))
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self.assertIsNone(utils.parsedate_tz('0'))
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self.assertIsNone(utils.parsedate('A Complete Waste of Time'))
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self.assertIsNone(utils.parsedate_tz('A Complete Waste of Time'))
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self.assertIsNone(utils.parsedate_tz('Wed, 3 Apr 2002 12.34.56.78+0800'))
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# See also test_parsedate_to_datetime_with_invalid_raises_valueerror
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# in test_utils.
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invalid_dates = [
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'',
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' ',
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'0',
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'A Complete Waste of Time',
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'Wed, 3 Apr 2002 12.34.56.78+0800',
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'17 June , 2022',
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'Friday, -Nov-82 16:14:55 EST',
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'Friday, Nov--82 16:14:55 EST',
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'Friday, 19-Nov- 16:14:55 EST',
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]
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for dtstr in invalid_dates:
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with self.subTest(dtstr=dtstr):
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self.assertIsNone(utils.parsedate(dtstr))
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self.assertIsNone(utils.parsedate_tz(dtstr))
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# Not a part of the spec but, but this has historically worked:
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self.assertIsNone(utils.parsedate(None))
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self.assertIsNone(utils.parsedate_tz(None))
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def test_parsedate_compact(self):
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self.assertEqual(utils.parsedate_tz('Wed, 3 Apr 2002 14:58:26 +0800'),
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(2002, 4, 3, 14, 58, 26, 0, 1, -1, 28800))
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# The FWS after the comma is optional
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self.assertEqual(utils.parsedate('Wed,3 Apr 2002 14:58:26 +0800'),
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utils.parsedate('Wed, 3 Apr 2002 14:58:26 +0800'))
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self.assertEqual(utils.parsedate_tz('Wed,3 Apr 2002 14:58:26 +0800'),
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(2002, 4, 3, 14, 58, 26, 0, 1, -1, 28800))
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# The comma is optional
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self.assertEqual(utils.parsedate_tz('Wed 3 Apr 2002 14:58:26 +0800'),
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(2002, 4, 3, 14, 58, 26, 0, 1, -1, 28800))
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def test_parsedate_no_dayofweek(self):
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eq = self.assertEqual
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eq(utils.parsedate_tz('25 Feb 2003 13:47:26 -0800'),
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(2003, 2, 25, 13, 47, 26, 0, 1, -1, -28800))
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def test_parsedate_compact_no_dayofweek(self):
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eq = self.assertEqual
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eq(utils.parsedate_tz('5 Feb 2003 13:47:26 -0800'),
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(2003, 2, 5, 13, 47, 26, 0, 1, -1, -28800))
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eq(utils.parsedate_tz('February 5, 2003 13:47:26 -0800'),
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(2003, 2, 5, 13, 47, 26, 0, 1, -1, -28800))
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def test_parsedate_no_space_before_positive_offset(self):
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self.assertEqual(utils.parsedate_tz('Wed, 3 Apr 2002 14:58:26+0800'),
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@ -3084,7 +3094,6 @@ def test_parsedate_no_space_before_negative_offset(self):
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self.assertEqual(utils.parsedate_tz('Wed, 3 Apr 2002 14:58:26-0800'),
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(2002, 4, 3, 14, 58, 26, 0, 1, -1, -28800))
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def test_parsedate_accepts_time_with_dots(self):
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eq = self.assertEqual
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eq(utils.parsedate_tz('5 Feb 2003 13.47.26 -0800'),
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@ -3092,6 +3101,20 @@ def test_parsedate_accepts_time_with_dots(self):
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eq(utils.parsedate_tz('5 Feb 2003 13.47 -0800'),
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(2003, 2, 5, 13, 47, 0, 0, 1, -1, -28800))
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def test_parsedate_rfc_850(self):
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self.assertEqual(utils.parsedate_tz('Friday, 19-Nov-82 16:14:55 EST'),
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(1982, 11, 19, 16, 14, 55, 0, 1, -1, -18000))
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def test_parsedate_no_seconds(self):
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self.assertEqual(utils.parsedate_tz('Wed, 3 Apr 2002 14:58 +0800'),
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(2002, 4, 3, 14, 58, 0, 0, 1, -1, 28800))
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def test_parsedate_dot_time_delimiter(self):
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self.assertEqual(utils.parsedate_tz('Wed, 3 Apr 2002 14.58.26 +0800'),
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(2002, 4, 3, 14, 58, 26, 0, 1, -1, 28800))
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self.assertEqual(utils.parsedate_tz('Wed, 3 Apr 2002 14.58 +0800'),
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(2002, 4, 3, 14, 58, 0, 0, 1, -1, 28800))
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def test_parsedate_acceptable_to_time_functions(self):
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eq = self.assertEqual
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timetup = utils.parsedate('5 Feb 2003 13:47:26 -0800')
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@ -49,12 +49,21 @@ def test_parsedate_to_datetime_naive(self):
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self.naive_dt)
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def test_parsedate_to_datetime_with_invalid_raises_valueerror(self):
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invalid_dates = ['',
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'0',
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'A Complete Waste of Time'
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'Tue, 06 Jun 2017 27:39:33 +0600',
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'Tue, 06 Jun 2017 07:39:33 +2600',
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'Tue, 06 Jun 2017 27:39:33']
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# See also test_parsedate_returns_None_for_invalid_strings in test_email.
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invalid_dates = [
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'',
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' ',
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'0',
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'A Complete Waste of Time',
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'Wed, 3 Apr 2002 12.34.56.78+0800'
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'Tue, 06 Jun 2017 27:39:33 +0600',
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'Tue, 06 Jun 2017 07:39:33 +2600',
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'Tue, 06 Jun 2017 27:39:33',
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'17 June , 2022',
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'Friday, -Nov-82 16:14:55 EST',
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'Friday, Nov--82 16:14:55 EST',
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'Friday, 19-Nov- 16:14:55 EST',
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]
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for dtstr in invalid_dates:
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with self.subTest(dtstr=dtstr):
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self.assertRaises(ValueError, utils.parsedate_to_datetime, dtstr)
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@ -0,0 +1 @@
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Fix IndexError in parsing invalid date in the :mod:`email` module.
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