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- """
- Utilities for XML generation/parsing.
- """
-
- import re
- from collections import OrderedDict
- from xml.sax.saxutils import XMLGenerator
-
-
- class UnserializableContentError(ValueError):
- pass
-
-
- 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 re.search(r'[\x00-\x08\x0B-\x0C\x0E-\x1F]', content):
- # Fail loudly when content has control chars (unsupported in XML 1.0)
- # See https://www.w3.org/International/questions/qa-controls
- raise UnserializableContentError("Control characters are not supported in XML 1.0")
- XMLGenerator.characters(self, content)
-
- def startElement(self, name, attrs):
- # Sort attrs for a deterministic output.
- sorted_attrs = OrderedDict(sorted(attrs.items())) if attrs else attrs
- super().startElement(name, sorted_attrs)
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