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Fix IndexError when parsing unexpectedly ending quoted-string. (GH-14813) 

This exception was caused because the input ended unexpectedly with only one
single quote instead of a pair with some value inside it.
(cherry picked from commit 719a062bcb)

Co-authored-by: Abhilash Raj <maxking@users.noreply.github.com>
This commit is contained in:
Miss Islington (bot) 2019-07-17 10:29:18 -07:00 committed by GitHub
parent 6816ca30af
commit 635743355d
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3 changed files with 7 additions and 1 deletions
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2
Lib/email/_header_value_parser.py
View File

@ -1170,7 +1170,7 @@ def get_bare_quoted_string(value):
"expected '\"' but found '{}'".format(value))
bare_quoted_string = BareQuotedString()
value = value[1:]
if value[0] == '"':
if value and value[0] == '"':
token, value = get_qcontent(value)
bare_quoted_string.append(token)
while value and value[0] != '"':

4
Lib/test/test_email/test__header_value_parser.py
View File

@ -503,6 +503,10 @@ class TestParser(TestParserMixin, TestEmailBase):
self._test_get_x(parser.get_bare_quoted_string,
'""', '""', '', [], '')
def test_get_bare_quoted_string_missing_endquotes(self):
self._test_get_x(parser.get_bare_quoted_string,
'"', '""', '', [errors.InvalidHeaderDefect], '')
def test_get_bare_quoted_string_following_wsp_preserved(self):
self._test_get_x(parser.get_bare_quoted_string,
'"foo"\t bar', '"foo"', 'foo', [], '\t bar')

2
Misc/NEWS.d/next/Library/2019-07-17-06-54-43.bpo-37491.op0aMs.rst Normal file
View File

@ -0,0 +1,2 @@
Fix ``IndexError`` when parsing email headers with unexpectedly ending
bare-quoted string value. Patch by Abhilash Raj.