1 ##############################################################################
2 #
3 # Copyright (c) 2001, 2002 Zope Corporation and Contributors.
4 # All Rights Reserved.
5 #
6 # This software is subject to the provisions of the Zope Public License,
7 # Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
8 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
9 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
10 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
11 # FOR A PARTICULAR PURPOSE
12 #
13 ##############################################################################
14 """
15 Generic expat-based XML parser base class.
16 """
18 class XMLParser:
20 ordered_attributes = 0
22 handler_names = [
23 "StartElementHandler",
24 "EndElementHandler",
25 "ProcessingInstructionHandler",
26 "CharacterDataHandler",
27 "UnparsedEntityDeclHandler",
28 "NotationDeclHandler",
29 "StartNamespaceDeclHandler",
30 "EndNamespaceDeclHandler",
31 "CommentHandler",
32 "StartCdataSectionHandler",
33 "EndCdataSectionHandler",
34 "DefaultHandler",
35 "DefaultHandlerExpand",
36 "NotStandaloneHandler",
37 "ExternalEntityRefHandler",
38 "XmlDeclHandler",
39 "StartDoctypeDeclHandler",
40 "EndDoctypeDeclHandler",
41 "ElementDeclHandler",
42 "AttlistDeclHandler"
43 ]
45 def __init__(self, encoding=None):
46 self.parser = p = self.createParser()
47 if self.ordered_attributes:
48 try:
49 self.parser.ordered_attributes = self.ordered_attributes
50 except AttributeError:
51 #zLOG.LOG("TAL.XMLParser", zLOG.INFO,
52 # "Can't set ordered_attributes")
53 self.ordered_attributes = 0
54 for name in self.handler_names:
55 method = getattr(self, name, None)
56 if method is not None:
57 try:
58 setattr(p, name, method)
59 except AttributeError:
60 #zLOG.LOG("TAL.XMLParser", zLOG.PROBLEM,
61 # "Can't set expat handler %s" % name)
62 pass
64 def createParser(self, encoding=None):
65 global XMLParseError
66 try:
67 from Products.ParsedXML.Expat import pyexpat
68 XMLParseError = pyexpat.ExpatError
69 return pyexpat.ParserCreate(encoding, ' ')
70 except ImportError:
71 from xml.parsers import expat
72 XMLParseError = expat.ExpatError
73 return expat.ParserCreate(encoding, ' ')
75 def parseFile(self, filename):
76 self.parseStream(open(filename))
78 def parseString(self, s):
79 self.parser.Parse(s, 1)
81 def parseURL(self, url):
82 import urllib
83 self.parseStream(urllib.urlopen(url))
85 def parseStream(self, stream):
86 self.parser.ParseFile(stream)
88 def parseFragment(self, s, end=0):
89 self.parser.Parse(s, end)