37 lines
1.1 KiB
Python
37 lines
1.1 KiB
Python
from simplexml import ustr
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# XML canonicalisation methods (for XEP-0116)
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def c14n(node):
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s = "<" + node.name
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if node.namespace:
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if not node.parent or node.parent.namespace != node.namespace:
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s = s + ' xmlns="%s"' % node.namespace
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sorted_attrs = sorted(node.attrs.keys())
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for key in sorted_attrs:
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val = ustr(node.attrs[key])
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# like XMLescape() but with whitespace and without >
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s = s + ' %s="%s"' % ( key, normalise_attr(val) )
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s = s + ">"
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cnt = 0
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if node.kids:
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for a in node.kids:
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if (len(node.data)-1) >= cnt:
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s = s + normalise_text(node.data[cnt])
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s = s + c14n(a)
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cnt=cnt+1
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if (len(node.data)-1) >= cnt: s = s + normalise_text(node.data[cnt])
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if not node.kids and s.endswith('>'):
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s=s[:-1]+' />'
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else:
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s = s + "</" + node.name + ">"
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return s.encode('utf-8')
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def normalise_attr(val):
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return val.replace('&', '&').replace('<', '<').replace('"', '"').replace('\t', '	').replace('\n', '
').replace('\r', '
')
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def normalise_text(val):
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return val.replace('&', '&').replace('<', '<').replace('>', '>').replace('\r', '
')
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# vim: se ts=3: |