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# Very simple test - Parse a file and print what happens
# XXX TypeErrors on calling handlers, or on bad return values from a
# handler, are obscure and unhelpful.
from xml.parsers import expat
class Outputter:
def StartElementHandler(self, name, attrs):
print 'Start element:\n\t', repr(name), attrs
def EndElementHandler(self, name):
print 'End element:\n\t', repr(name)
def CharacterDataHandler(self, data):
data = data.strip()
if data:
print 'Character data:'
print '\t', repr(data)
def ProcessingInstructionHandler(self, target, data):
print 'PI:\n\t', repr(target), repr(data)
def StartNamespaceDeclHandler(self, prefix, uri):
print 'NS decl:\n\t', repr(prefix), repr(uri)
def EndNamespaceDeclHandler(self, prefix):
print 'End of NS decl:\n\t', repr(prefix)
def StartCdataSectionHandler(self):
print 'Start of CDATA section'
def EndCdataSectionHandler(self):
print 'End of CDATA section'
def CommentHandler(self, text):
print 'Comment:\n\t', repr(text)
def NotationDeclHandler(self, *args):
name, base, sysid, pubid = args
print 'Notation declared:', args
def UnparsedEntityDeclHandler(self, *args):
entityName, base, systemId, publicId, notationName = args
print 'Unparsed entity decl:\n\t', args
def NotStandaloneHandler(self, userData):
print 'Not standalone'
return 1
def ExternalEntityRefHandler(self, *args):
context, base, sysId, pubId = args
print 'External entity ref:', args[1:]
return 1
def DefaultHandler(self, userData):
pass
def DefaultHandlerExpand(self, userData):
pass
def confirm(ok):
if ok:
print "OK."
else:
print "Not OK."
out = Outputter()
parser = expat.ParserCreate(namespace_separator='!')
# Test getting/setting returns_unicode
parser.returns_unicode = 0; confirm(parser.returns_unicode == 0)
parser.returns_unicode = 1; confirm(parser.returns_unicode == 1)
parser.returns_unicode = 2; confirm(parser.returns_unicode == 1)
parser.returns_unicode = 0; confirm(parser.returns_unicode == 0)
# Test getting/setting ordered_attributes
parser.ordered_attributes = 0; confirm(parser.ordered_attributes == 0)
parser.ordered_attributes = 1; confirm(parser.ordered_attributes == 1)
parser.ordered_attributes = 2; confirm(parser.ordered_attributes == 1)
parser.ordered_attributes = 0; confirm(parser.ordered_attributes == 0)
# Test getting/setting specified_attributes
parser.specified_attributes = 0; confirm(parser.specified_attributes == 0)
parser.specified_attributes = 1; confirm(parser.specified_attributes == 1)
parser.specified_attributes = 2; confirm(parser.specified_attributes == 1)
parser.specified_attributes = 0; confirm(parser.specified_attributes == 0)
HANDLER_NAMES = [
'StartElementHandler', 'EndElementHandler',
'CharacterDataHandler', 'ProcessingInstructionHandler',
'UnparsedEntityDeclHandler', 'NotationDeclHandler',
'StartNamespaceDeclHandler', 'EndNamespaceDeclHandler',
'CommentHandler', 'StartCdataSectionHandler',
'EndCdataSectionHandler',
'DefaultHandler', 'DefaultHandlerExpand',
#'NotStandaloneHandler',
'ExternalEntityRefHandler'
]
for name in HANDLER_NAMES:
setattr(parser, name, getattr(out, name))
data = '''\
<?xml version="1.0" encoding="iso-8859-1" standalone="no"?>
<?xml-stylesheet href="stylesheet.css"?>
<!-- comment data -->
<!DOCTYPE quotations SYSTEM "quotations.dtd" [
<!ELEMENT root ANY>
<!NOTATION notation SYSTEM "notation.jpeg">
<!ENTITY acirc "â">
<!ENTITY external_entity SYSTEM "entity.file">
<!ENTITY unparsed_entity SYSTEM "entity.file" NDATA notation>
%unparsed_entity;
]>
<root attr1="value1" attr2="value2ὀ">
<myns:subelement xmlns:myns="http://www.python.org/namespace">
Contents of subelements
</myns:subelement>
<sub2><![CDATA[contents of CDATA section]]></sub2>
&external_entity;
</root>
'''
# Produce UTF-8 output
parser.returns_unicode = 0
try:
parser.Parse(data, 1)
except expat.error:
print '** Error', parser.ErrorCode, expat.ErrorString(parser.ErrorCode)
print '** Line', parser.ErrorLineNumber
print '** Column', parser.ErrorColumnNumber
print '** Byte', parser.ErrorByteIndex
# Try the parse again, this time producing Unicode output
parser = expat.ParserCreate(namespace_separator='!')
parser.returns_unicode = 1
for name in HANDLER_NAMES:
setattr(parser, name, getattr(out, name))
try:
parser.Parse(data, 1)
except expat.error:
print '** Error', parser.ErrorCode, expat.ErrorString(parser.ErrorCode)
print '** Line', parser.ErrorLineNumber
print '** Column', parser.ErrorColumnNumber
print '** Byte', parser.ErrorByteIndex
# Try parsing a file
parser = expat.ParserCreate(namespace_separator='!')
parser.returns_unicode = 1
for name in HANDLER_NAMES:
setattr(parser, name, getattr(out, name))
import StringIO
file = StringIO.StringIO(data)
try:
parser.ParseFile(file)
except expat.error:
print '** Error', parser.ErrorCode, expat.ErrorString(parser.ErrorCode)
print '** Line', parser.ErrorLineNumber
print '** Column', parser.ErrorColumnNumber
print '** Byte', parser.ErrorByteIndex
# Tests that make sure we get errors when the namespace_separator value
# is illegal, and that we don't for good values:
print
print "Testing constructor for proper handling of namespace_separator values:"
expat.ParserCreate()
expat.ParserCreate(namespace_separator=None)
expat.ParserCreate(namespace_separator=' ')
print "Legal values tested o.k."
try:
expat.ParserCreate(namespace_separator=42)
except TypeError, e:
print "Caught expected TypeError:"
print e
else:
print "Failed to catch expected TypeError."
try:
expat.ParserCreate(namespace_separator='too long')
except ValueError, e:
print "Caught expected ValueError:"
print e
else:
print "Failed to catch expected ValueError."
# ParserCreate() needs to accept a namespace_separator of zero length
# to satisfy the requirements of RDF applications that are required
# to simply glue together the namespace URI and the localname. Though
# considered a wart of the RDF specifications, it needs to be supported.
#
# See XML-SIG mailing list thread starting with
# http://mail.python.org/pipermail/xml-sig/2001-April/005202.html
#
expat.ParserCreate(namespace_separator='') # too short
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