william
bffb3b7fce
The function check_with_xsd has been deprecated for more than 3 years. Docstring is now compliant with PEP 257 closes odoo/odoo#54338 X-original-commit: 29938397ee17835645e89ee0dadb26e14ef45927 Signed-off-by: Josse Colpaert <jco@openerp.com>
86 lines
3.2 KiB
Python
86 lines
3.2 KiB
Python
# -*- coding: utf-8 -*-
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"""Utilities for generating, parsing and checking XML/XSD files on top of the lxml.etree module."""
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import base64
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from io import BytesIO
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from lxml import etree
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from odoo.exceptions import UserError
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class odoo_resolver(etree.Resolver):
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"""Odoo specific file resolver that can be added to the XML Parser.
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It will search filenames in the ir.attachments
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"""
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def __init__(self, env):
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super().__init__()
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self.env = env
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def resolve(self, url, id, context):
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"""Search url in ``ir.attachment`` and return the resolved content."""
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attachment = self.env['ir.attachment'].search([('name', '=', url)])
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if attachment:
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return self.resolve_string(base64.b64decode(attachment.datas), context)
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def _check_with_xsd(tree_or_str, stream, env=None):
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"""Check an XML against an XSD schema.
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This will raise a UserError if the XML file is not valid according to the
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XSD file.
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:param tree_or_str (etree, str): representation of the tree to be checked
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:param stream (io.IOBase, str): the byte stream used to build the XSD schema.
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If env is given, it can also be the name of an attachment in the filestore
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:param env (odoo.api.Environment): If it is given, it enables resolving the
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imports of the schema in the filestore with ir.attachments.
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"""
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if not isinstance(tree_or_str, etree._Element):
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tree_or_str = etree.fromstring(tree_or_str)
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parser = etree.XMLParser()
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if env:
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parser.resolvers.add(odoo_resolver(env))
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if isinstance(stream, str) and stream.endswith('.xsd'):
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attachment = env['ir.attachment'].search([('name', '=', stream)])
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if not attachment:
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raise FileNotFoundError()
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stream = BytesIO(base64.b64decode(attachment.datas))
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xsd_schema = etree.XMLSchema(etree.parse(stream, parser=parser))
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try:
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xsd_schema.assertValid(tree_or_str)
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except etree.DocumentInvalid as xml_errors:
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raise UserError('\n'.join(str(e) for e in xml_errors.error_log))
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def create_xml_node_chain(first_parent_node, nodes_list, last_node_value=None):
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"""Generate a hierarchical chain of nodes.
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Each new node being the child of the previous one based on the tags contained
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in `nodes_list`, under the given node `first_parent_node`.
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:param first_parent_node (etree._Element): parent of the created tree/chain
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:param nodes_list (iterable<str>): tag names to be created
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:param last_node_value (str): if specified, set the last node's text to this value
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:returns (list<etree._Element>): the list of created nodes
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"""
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res = []
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current_node = first_parent_node
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for tag in nodes_list:
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current_node = etree.SubElement(current_node, tag)
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res.append(current_node)
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if last_node_value is not None:
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current_node.text = last_node_value
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return res
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def create_xml_node(parent_node, node_name, node_value=None):
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"""Create a new node.
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:param parent_node (etree._Element): parent of the created node
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:param node_name (str): name of the created node
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:param node_value (str): value of the created node (optional)
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:returns (etree._Element):
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"""
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return create_xml_node_chain(parent_node, [node_name], node_value)[0]
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