d36ec4cc-df84-4d4f-9efc-7b1fe70aca9e
commented
16 years ago email.Header.decode_header() does not correctly deal with multiline Headerlines. header.py in revision 54371 (1) changes the behaviour, whereas previously multiline headers where parsed correctly, header.py 54371 introduced a new regex part, that renders such headers invalid and they won't be parsed as expected. Given the following header line (doesn't matter if its parsed from a mail or read from a string) which represents IMHO a valid RFC2047 header line:
from email.Header import decode_header
decode_header('=?windows-1252?Q?=22M=FCller_T=22?=\r\n <T.Mueller@xxx.com>')this will result in: header.py (54371): [('=?windows-1252?Q?=22M=FCller_T=22?=\r\n \T.Mueller@xxx.com\', None)]
resp. with header.py (54370): [('"M\xfcller T"', 'windows-1252'), (' \T.Mueller@xxx.com\', None)]
Actually both seem parsed wrong, but with 54370 the result looks more
sane (the space should be IMO removed).
Once the CRLF sequence is removed from the header it works fine and all
looks as expected:
>>> decode_header('=?windows-1252?Q?=22M=FCller_T=22?= <T.Mueller@xxx.com>')
[('"M\xfcller T"', 'windows-1252'), ('<T.Mueller@xxx.com>', None)]This problem might or might not be related to
- bpo-1372770
- bpo-1467619
1762cc99-3127-4a62-9baf-30c3d0f51ef7
bitdancer
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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GitHub fields: ```python assignee = None closed_at =
created_at =
labels = ['type-bug', 'library', 'expert-email']
title = 'decode_header() fails on multiline headers'
updated_at =
user = 'https://bugs.python.org/cschnee'
```
bugs.python.org fields:
```python
activity =
actor = 'r.david.murray'
assignee = 'none'
closed = True
closed_date =
closer = 'r.david.murray'
components = ['Library (Lib)', 'email']
creation =
creator = 'cschnee'
dependencies = []
files = []
hgrepos = []
issue_num = 2658
keywords = []
message_count = 3.0
messages = ['65630', '162220', '162222']
nosy_count = 4.0
nosy_names = ['barry', 'cschnee', 'r.david.murray', 'python-dev']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '1079'
type = 'behavior'
url = 'https://bugs.python.org/issue2658'
versions = ['Python 3.3']
```