| 12345678910111213141516171819202122232425262728293031323334353637383940 |
- """
- Utilities for XML generation/parsing.
- """
- from xml.sax.saxutils import XMLGenerator
- from django.utils.regex_helper import _lazy_re_compile
- _xml_control_chars_re = _lazy_re_compile(r"[\x00-\x08\x0B-\x0C\x0E-\x1F]")
- class UnserializableContentError(ValueError):
- def __init__(self, msg="Control characters are not supported in XML 1.0"):
- super().__init__(msg)
- class SimplerXMLGenerator(XMLGenerator):
- def addQuickElement(self, name, contents=None, attrs=None):
- "Convenience method for adding an element with no children"
- if attrs is None:
- attrs = {}
- self.startElement(name, attrs)
- if contents is not None:
- self.characters(contents)
- self.endElement(name)
- def characters(self, content):
- if content and _xml_control_chars_re.search(content):
- # Fail loudly when content has control chars (unsupported in XML
- # 1.0) See https://www.w3.org/International/questions/qa-controls
- raise UnserializableContentError
- XMLGenerator.characters(self, content)
- def startElement(self, name, attrs):
- for value in attrs.values():
- if isinstance(value, str) and _xml_control_chars_re.search(value):
- raise UnserializableContentError
- # Sort attrs for a deterministic output.
- sorted_attrs = dict(sorted(attrs.items())) if attrs else attrs
- super().startElement(name, sorted_attrs)
|
