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edx-platform/common/lib/safe_lxml/safe_lxml/etree.py
2019-12-30 12:25:38 -05:00

32 lines
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Python

"""
Safer version of lxml.etree.
It overrides some unsafe functions from lxml.etree with safer versions from defusedxml.
It also includes a safer XMLParser.
For processing xml always prefer this over using lxml.etree directly.
"""
# Names are imported into this module so that it can be a stand-in for
# lxml.etree. The names are not used here, so disable the pylint warning.
# pylint: disable=unused-import, wildcard-import, unused-wildcard-import
from lxml.etree import XMLParser as _XMLParser
from lxml.etree import *
from lxml.etree import _Element, _ElementTree
# This should be imported after lxml.etree so that it overrides the following attributes.
from defusedxml.lxml import XML, fromstring, parse
class XMLParser(_XMLParser): # pylint: disable=function-redefined
"""
A safer version of XMLParser which by default disables entity resolution.
"""
def __init__(self, *args, **kwargs):
if "resolve_entities" not in kwargs:
kwargs["resolve_entities"] = False
super(XMLParser, self).__init__(*args, **kwargs)