Current File : //lib/python3.9/site-packages/setroubleshoot/html_util.py
# Authors: John Dennis <jdennis@redhat.com>
#
# Copyright (C) 2007 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
__all__ = [
'escape_html',
'unescape_html',
'html_to_text',
]
import syslog
import textwrap
from html.parser import HTMLParser
#------------------------------------------------------------------------------
class HTMLFilter(HTMLParser):
def __init__(self):
HTMLParser.__init__(self)
self.text = ""
def handle_data(self, data):
self.text += data
#------------------------------------------------------------------------------
def escape_html(s):
if s is None:
return None
s = s.replace("&", "&") # Must be done first!
s = s.replace("<", "<")
s = s.replace(">", ">")
s = s.replace("'", "'")
s = s.replace('"', """)
return s
def unescape_html(s):
if s is None:
return None
if '&' not in s:
return s
s = s.replace("<", "<")
s = s.replace(">", ">")
s = s.replace("'", "'")
s = s.replace(""", '"')
s = s.replace("&", "&") # Must be last
return s
def html_to_text(html, maxcol=80):
try:
hfilter = HTMLFilter()
hfilter.feed(html)
return textwrap.fill(hfilter.text, width=maxcol)
except Exception as e:
syslog.syslog(syslog.LOG_ERR, 'cannot convert html to text: %s' % e)
return None
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