roundup/cgi/TAL/XMLParser.py

   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 # Modifications for Roundup:
  15 # 1. commented out zLOG references
  16 """
  17 Generic expat-based XML parser base class.
  18 """
  19
  20 #import zLOG
  21
  22 class XMLParser:
  23
  24     ordered_attributes = 0
  25
  26     handler_names = [
  27         "StartElementHandler",
  28         "EndElementHandler",
  29         "ProcessingInstructionHandler",
  30         "CharacterDataHandler",
  31         "UnparsedEntityDeclHandler",
  32         "NotationDeclHandler",
  33         "StartNamespaceDeclHandler",
  34         "EndNamespaceDeclHandler",
  35         "CommentHandler",
  36         "StartCdataSectionHandler",
  37         "EndCdataSectionHandler",
  38         "DefaultHandler",
  39         "DefaultHandlerExpand",
  40         "NotStandaloneHandler",
  41         "ExternalEntityRefHandler",
  42         "XmlDeclHandler",
  43         "StartDoctypeDeclHandler",
  44         "EndDoctypeDeclHandler",
  45         "ElementDeclHandler",
  46         "AttlistDeclHandler"
  47         ]
  48
  49     def __init__(self, encoding=None):
  50         self.parser = p = self.createParser()
  51         if self.ordered_attributes:
  52             try:
  53                 self.parser.ordered_attributes = self.ordered_attributes
  54             except AttributeError:
  55                 #zLOG.LOG("TAL.XMLParser", zLOG.INFO,
  56                 #         "Can't set ordered_attributes")
  57                 self.ordered_attributes = 0
  58         for name in self.handler_names:
  59             method = getattr(self, name, None)
  60             if method is not None:
  61                 try:
  62                     setattr(p, name, method)
  63                 except AttributeError:
  64                     #zLOG.LOG("TAL.XMLParser", zLOG.PROBLEM,
  65                     #         "Can't set expat handler %s" % name)
  66                     pass
  67
  68     def createParser(self, encoding=None):
  69         global XMLParseError
  70         try:
  71             from Products.ParsedXML.Expat import pyexpat
  72             XMLParseError = pyexpat.ExpatError
  73             return pyexpat.ParserCreate(encoding, ' ')
  74         except ImportError:
  75             from xml.parsers import expat
  76             XMLParseError = expat.ExpatError
  77             return expat.ParserCreate(encoding, ' ')
  78
  79     def parseFile(self, filename):
  80         self.parseStream(open(filename))
  81
  82     def parseString(self, s):
  83         self.parser.Parse(s, 1)
  84
  85     def parseURL(self, url):
  86         import urllib
  87         self.parseStream(urllib.urlopen(url))
  88
  89     def parseStream(self, stream):
  90         self.parser.ParseFile(stream)
  91
  92     def parseFragment(self, s, end=0):
  93         self.parser.Parse(s, end)