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patch #1462498: handle entityrefs in attribute values.

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This commit is contained in:
Georg Brandl 2006-04-01 08:35:18 +00:00
parent 48d5e508eb
commit 7f6b67c235
4 changed files with 53 additions and 5 deletions
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34
Lib/sgmllib.py
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@ -269,9 +269,37 @@ class SGMLParser(markupbase.ParserBase):
attrname, rest, attrvalue = match.group(1, 2, 3)
if not rest:
attrvalue = attrname
elif attrvalue[:1] == '\'' == attrvalue[-1:] or \
attrvalue[:1] == '"' == attrvalue[-1:]:
attrvalue = attrvalue[1:-1]
else:
if (attrvalue[:1] == "'" == attrvalue[-1:] or
attrvalue[:1] == '"' == attrvalue[-1:]):
# strip quotes
attrvalue = attrvalue[1:-1]
l = 0
new_attrvalue = ''
while l < len(attrvalue):
av_match = entityref.match(attrvalue, l)
if (av_match and av_match.group(1) in self.entitydefs and
attrvalue[av_match.end(1)] == ';'):
# only substitute entityrefs ending in ';' since
# otherwise we may break <a href='?p=x&q=y'>
# which is very common
new_attrvalue += self.entitydefs[av_match.group(1)]
l = av_match.end(0)
continue
ch_match = charref.match(attrvalue, l)
if ch_match:
try:
char = chr(int(ch_match.group(1)))
new_attrvalue += char
l = ch_match.end(0)
continue
except ValueError:
# invalid character reference, don't substitute
pass
# all other cases
new_attrvalue += attrvalue[l]
l += 1
attrvalue = new_attrvalue
attrs.append((attrname.lower(), attrvalue))
k = match.end(0)
if rawdata[j] == '>':