Bugs item #1414018, was opened at 2006-01-24 15:19
Message generated for change (Comment added) made by bwarsaw
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Category: Python Library
Group: Python 2.4
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: A. Sagawa (qbin)
Assigned to: Barry A. Warsaw (bwarsaw)
Summary: email.Utils.py: UnicodeError in RFC2322 header

Initial Comment:
Description:
collapse_rfc2231_value does not handle UnicodeError
exception. Therefore a header like this one can cause
UnicodeError in attempting unicode conversion.

---
Content-Type: text/plain; charset="ISO-2022-JP"
Content-Disposition: attachment;
 filename*=iso-2022-jp''%1B%24BJs9p%3Dq%2D%21%1B%28B%2Etxt
---

Test script:
---
#! /usr/bin/env python
import sys
import email

msg = email.message_from_file(sys.stdin)
for part in msg.walk():
  print part.get_params()
  print part.get_filename()
---
run
% env LANG=ja_JP.eucJP ./test.py < attached_sample.eml

Background:
Character 0x2d21 is invalid in JIS X0208 but defined in
CP932 (Shift_JIS's superset by Microsoft).  Conversion
between Shift_JIS and ISO-2022-JP are computable
because both of them based on JIS X0208. So sometimes
CP932 characters appear in ISO-2022-JP encoded string,
typically produced by Windows MUA.
But Python's "ISO-2022-JP" means *pure* JIS X0208, thus
conversion is failed.

Workaround:
Convert to fallback_charset and/or skip invalid character.

----------------------------------------------------------------------

>Comment By: Barry A. Warsaw (bwarsaw)
Date: 2006-07-27 23:19

Message:
Logged In: YES 
user_id=12800

r50894 for Python 2.4/email 3.0.  This is already fixed in
Python 2.5/email 4.0


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