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# Copyright 2008 The Tor Project, Inc. See LICENSE for licensing information.
import re
import thandy
def xml_str_encoder(s):
s = s.replace("&", "&")
s = s.replace("<", "<")
s = s.replace(">", ">")
return s
def isAsciiName(s):
"""
Return true iff s is pure-ascii, and a syntactically valid XML name.
>>> isAsciiName("a")
True
>>> isAsciiName("ab.-dc")
True
>>> isAsciiName("")
False
>>> isAsciiName(".foo")
False
"""
return re.match(r'^[A-Za-z\_\:][A-Za-z0-9\_\:\-\.]*$', s) != None
def _encodeToXML(obj, outf):
if isinstance(obj, basestring):
outf(xml_str_encoder(obj))
elif obj is True:
outf("true")
elif obj is False:
outf("false")
elif obj is None:
outf("null")
elif isinstance(obj, (int,long)):
outf(str(obj))
elif isinstance(obj, (tuple, list)):
outf("<list>\n")
for item in obj:
outf("<item>")
_encodeToXML(item, outf)
outf("</item> ")
outf("</list>\n")
elif isinstance(obj, dict):
outf("<dict>\n")
for k,v in sorted(obj.items()):
isAscii = isAsciiName(k)
if isAscii:
outf("<%s>"%k)
_encodeToXML(v, outf)
outf("</%s>\n"%k)
else:
outf("<dict-entry><key>%s</key><val>"%xml_str_encoder(k))
_encodeToXML(v, outf)
outf("</val></dict-entry>\n")
outf("</dict>\n")
else:
raise thandy.FormatException("I can't encode %r"%obj)
def encodeToXML(obj, outf=None):
"""Convert a json-encodable object to a quick-and-dirty XML equivalent."""
result = None
if outf == None:
result = []
outf = result.append
_encodeToXML(obj, outf)
if result is not None:
return "".join(result)
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