101 lines
3.5 KiB
Python
101 lines
3.5 KiB
Python
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import os
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import re
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##
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import requests
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from lxml import etree
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class Config(object):
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default_xsd = 'http://schema.xml.r00t2.io/projects/he_ipv6.xsd'
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def __init__(self, xml_path, *args, **kwargs):
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self.xml_path = os.path.abspath(os.path.expanduser(xml_path))
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if not os.path.isfile(self.xml_path):
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raise ValueError('xml_path does not exist')
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self.tree = None
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self.ns_tree = None
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self.xml = None
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self.ns_xml = None
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self.raw = None
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self.xsd = None
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self.defaults_parser = None
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self.obj = None
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self.tunnels = {}
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self.creds = {}
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self.parse_raw()
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self.get_xsd()
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self.populate_defaults()
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self.validate()
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def get_xsd(self):
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raw_xsd = None
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base_url = None
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xsi = self.xml.nsmap.get('xsi', 'http://www.w3.org/2001/XMLSchema-instance')
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schemaLocation = '{{{0}}}schemaLocation'.format(xsi)
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schemaURL = self.xml.attrib.get(schemaLocation, self.default_xsd)
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split_url = schemaURL.split()
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if len(split_url) == 2: # a properly defined schemaLocation
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schemaURL = split_url[1]
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else:
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schemaURL = split_url[0] # a LAZY schemaLocation
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if schemaURL.startswith('file://'):
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schemaURL = re.sub(r'^file://', r'', schemaURL)
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with open(schemaURL, 'rb') as fh:
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raw_xsd = fh.read()
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base_url = os.path.dirname(schemaURL) + '/'
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else:
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req = requests.get(schemaURL)
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if not req.ok:
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raise RuntimeError('Could not download XSD')
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raw_xsd = req.content
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base_url = os.path.split(req.url)[0] + '/' # This makes me feel dirty.
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self.xsd = etree.XMLSchema(etree.XML(raw_xsd, base_url = base_url))
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return(None)
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def parse_raw(self, parser = None):
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if not self.raw:
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with open(self.xml_path, 'rb') as fh:
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self.raw = fh.read()
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self.xml = etree.fromstring(self.raw, parser = parser)
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self.ns_xml = etree.fromstring(self.raw, parser = parser)
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self.tree = self.xml.getroottree()
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self.ns_tree = self.ns_xml.getroottree()
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self.tree.xinclude()
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self.ns_tree.xinclude()
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self.strip_ns()
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return(None)
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def populate_defaults(self):
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if not self.xsd:
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self.get_xsd()
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if not self.defaults_parser:
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self.defaults_parser = etree.XMLParser(schema = self.xsd, attribute_defaults = True)
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self.parse_raw(parser = self.defaults_parser)
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return(None)
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def remove_defaults(self):
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self.parse_raw()
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return(None)
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def strip_ns(self, obj = None):
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# https://stackoverflow.com/questions/30232031/how-can-i-strip-namespaces-out-of-an-lxml-tree/30233635#30233635
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xpathq = "descendant-or-self::*[namespace-uri()!='']"
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if not obj:
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for x in (self.tree, self.xml):
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for e in x.xpath(xpathq):
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e.tag = etree.QName(e).localname
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elif isinstance(obj, (etree._Element, etree._ElementTree)):
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obj = copy.deepcopy(obj)
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for e in obj.xpath(xpathq):
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e.tag = etree.QName(e).localname
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return(obj)
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else:
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raise ValueError('Did not know how to parse obj parameter')
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return(None)
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def validate(self):
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if not self.xsd:
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self.get_xsd()
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self.xsd.assertValid(self.ns_tree)
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return(None)
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