Issue 14251: HTMLParser decode issue (original) (raw)
Created on 2012-03-11 02:23 by rednaks, last changed 2022-04-11 14:57 by admin. This issue is now closed.
Messages (7)
Author: rednaks (rednaks)
Date: 2012-03-11 02:23
Hello ! while parsing a HTML code i got an decode Error :
but this issue can be fixed by replacing the last string by s.decode() like in the diff file. I also tried to execute my script under python3.2 and it does not parsing any thing
File "/usr/lib/python2.7/HTMLParser.py", line 111, in feed self.goahead(0) File "/usr/lib/python2.7/HTMLParser.py", line 155, in goahead k = self.parse_starttag(i) File "/usr/lib/python2.7/HTMLParser.py", line 260, in parse_starttag attrvalue = self.unescape(attrvalue) File "/usr/lib/python2.7/HTMLParser.py", line 410, in unescape return re.sub(r"&(#?[xX]?(?:[0-9a-fA-F]+|\w{1,8}));", replaceEntities, s) File "/usr/lib/python2.7/re.py", line 151, in sub return _compile(pattern, flags).sub(repl, string, count) UnicodeDecodeError: 'ascii' codec can't decode byte 0x97 in position 1: ordinal not in range(128)
Author: Ezio Melotti (ezio.melotti) * 
Date: 2012-03-11 02:32
Can you provide a minimal example to reproduce this error?
On Python 2 it's always better to decode the HTML first and then pass unicode to the parser. Even though on Python 2 the parser accepts bytes string too, there are a few corner cases where it fails.
On Python 3 the parser only accepts unicode, and it should work fine with it (especially if you have an updated clone of cpython). Can you show what failure you get with Python 3? Also, can you reproduce the error if you use strict=False?
Author: Ezio Melotti (ezio.melotti) *
Date: 2012-03-11 02:35
See also #3932.
Author: rednaks (rednaks)
Date: 2012-03-11 18:12
So we cant make decode by default ? ! Concerning python 3, it seems that it's not reading tags and attributes, i didn't get any error, but i don't have any result
the example i used is there : http://docs.python.org/library/htmlparser.html#module-HTMLParser
Of course, I replaced HTMLParser by html.parser
Author: Ezio Melotti (ezio.melotti) *
Date: 2012-03-11 18:32
I don't think the patch can be applied as is -- in order to work s should be an ascii-only str. I will look at this again as soon as I have some time and see if something can be done.
FTR the Python 3 doc for html.parser can be found here: http://docs.python.org/py3k/library/html.parser.html#example-html-parser-application
Author: rednaks (rednaks)
Date: 2012-03-11 21:53
thank you for giving me a little of your time !
Yes that's what i've tested, i used the html.parser module and and I have no result!
Author: Ezio Melotti (ezio.melotti) *
Date: 2012-03-13 00:11
I test this again and indeed a bare s.decode() is not enough to fix the problem. The attribute might contain non-ascii characters, and that will result in an error (see for example the "test.py" script attached to #3932). The correct solution is to decode the page before passing it to the parser.
History
Date
User
Action
Args
2022-04-11 14:57:27
admin
set
github: 58459
2012-03-13 00:11:30
ezio.melotti
set
status: open -> closed
versions: - Python 3.2
superseder: HTMLParser cannot handle '&' and non-ascii characters in attribute names
messages: +
resolution: duplicate
stage: resolved
2012-03-11 21:53:43
rednaks
set
messages: +
2012-03-11 18:32:53
ezio.melotti
set
messages: +
2012-03-11 18:12:26
rednaks
set
messages: +
2012-03-11 10:21:55
eric.araujo
set
nosy: + eric.araujo
title: [PATCH]HTMLParser decode issue -> HTMLParser decode issue
2012-03-11 02:35:16
ezio.melotti
set
messages: +
2012-03-11 02:32:20
ezio.melotti
set
nosy: + ezio.melotti
messages: +
assignee: ezio.melotti
type: crash -> behavior
2012-03-11 02:23:14
rednaks
create