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59 lines
1.9 KiB
Python
59 lines
1.9 KiB
Python
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from __future__ import absolute_import
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import re
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from xml.etree import ElementTree
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from .base import BaseProcessor, DEFAULT_INDENT
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DECLARATION_RE = re.compile('<\?xml[^\n]+?\?>', flags=re.I)
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DOCTYPE_RE = re.compile('<!DOCTYPE[^\n]+?>', flags=re.I)
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def indent(elem, indent_text=' ' * DEFAULT_INDENT):
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"""
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In-place prettyprint formatter
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C.f. http://effbot.org/zone/element-lib.htm#prettyprint
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"""
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def _indent(elem, level=0):
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i = "\n" + level * indent_text
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if len(elem):
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if not elem.text or not elem.text.strip():
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elem.text = i + indent_text
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if not elem.tail or not elem.tail.strip():
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elem.tail = i
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for elem in elem:
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_indent(elem, level + 1)
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if not elem.tail or not elem.tail.strip():
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elem.tail = i
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else:
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if level and (not elem.tail or not elem.tail.strip()):
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elem.tail = i
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return _indent(elem)
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class XMLProcessor(BaseProcessor):
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# TODO: tests
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def process_body(self, body, mime):
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if 'xml' in mime:
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# FIXME: orig NS names get forgotten during the conversion, etc.
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try:
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root = ElementTree.fromstring(body.encode('utf8'))
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except ElementTree.ParseError:
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# Ignore invalid XML errors (skips attempting to pretty print)
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pass
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else:
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indent(root)
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# Use the original declaration
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declaration = DECLARATION_RE.match(body)
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doctype = DOCTYPE_RE.match(body)
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body = ElementTree.tostring(root, encoding='utf-8')\
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.decode('utf8')
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if doctype:
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body = '%s\n%s' % (doctype.group(0), body)
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if declaration:
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body = '%s\n%s' % (declaration.group(0), body)
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return body
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