##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE
#
##############################################################################
"""
Generic expat-based XML parser base class.
"""
import zLOG
class XMLParser:
ordered_attributes = 0
handler_names = [
"StartElementHandler",
"EndElementHandler",
"ProcessingInstructionHandler",
"CharacterDataHandler",
"UnparsedEntityDeclHandler",
"NotationDeclHandler",
"StartNamespaceDeclHandler",
"EndNamespaceDeclHandler",
"CommentHandler",
"StartCdataSectionHandler",
"EndCdataSectionHandler",
"DefaultHandler",
"DefaultHandlerExpand",
"NotStandaloneHandler",
"ExternalEntityRefHandler",
"XmlDeclHandler",
"StartDoctypeDeclHandler",
"EndDoctypeDeclHandler",
"ElementDeclHandler",
"AttlistDeclHandler"
]
def __init__(self, encoding=None):
self.parser = p = self.createParser()
if self.ordered_attributes:
try:
self.parser.ordered_attributes = self.ordered_attributes
except AttributeError:
zLOG.LOG("TAL.XMLParser", zLOG.INFO,
"Can't set ordered_attributes")
self.ordered_attributes = 0
for name in self.handler_names:
method = getattr(self, name, None)
if method is not None:
try:
setattr(p, name, method)
except AttributeError:
zLOG.LOG("TAL.XMLParser", zLOG.PROBLEM,
"Can't set expat handler %s" % name)
def createParser(self, encoding=None):
global XMLParseError
try:
from Products.ParsedXML.Expat import pyexpat
XMLParseError = pyexpat.ExpatError
return pyexpat.ParserCreate(encoding, ' ')
except ImportError:
from xml.parsers import expat
XMLParseError = expat.ExpatError
return expat.ParserCreate(encoding, ' ')
def parseFile(self, filename):
self.parseStream(open(filename))
def parseString(self, s):
self.parser.Parse(s, 1)
def parseURL(self, url):
import urllib
self.parseStream(urllib.urlopen(url))
def parseStream(self, stream):
self.parser.ParseFile(stream)
def parseFragment(self, s, end=0):
self.parser.Parse(s, end)
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