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annotate TAL/XMLParser.py @ 1029:c3e391d9c4e9

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author Richard Jones <richard@users.sourceforge.net>
date Tue, 03 Sep 2002 07:42:38 +0000
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children
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1 ##############################################################################
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2 #
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3 # Copyright (c) 2001, 2002 Zope Corporation and Contributors.
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4 # All Rights Reserved.
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5 #
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6 # This software is subject to the provisions of the Zope Public License,
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7 # Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
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8 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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9 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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10 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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11 # FOR A PARTICULAR PURPOSE
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12 #
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13 ##############################################################################
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14 """
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15 Generic expat-based XML parser base class.
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16 """
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17
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18 import zLOG
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19
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20 class XMLParser:
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21
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22 ordered_attributes = 0
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23
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24 handler_names = [
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25 "StartElementHandler",
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26 "EndElementHandler",
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27 "ProcessingInstructionHandler",
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28 "CharacterDataHandler",
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29 "UnparsedEntityDeclHandler",
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30 "NotationDeclHandler",
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31 "StartNamespaceDeclHandler",
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32 "EndNamespaceDeclHandler",
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33 "CommentHandler",
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34 "StartCdataSectionHandler",
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35 "EndCdataSectionHandler",
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36 "DefaultHandler",
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37 "DefaultHandlerExpand",
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38 "NotStandaloneHandler",
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39 "ExternalEntityRefHandler",
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40 "XmlDeclHandler",
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41 "StartDoctypeDeclHandler",
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42 "EndDoctypeDeclHandler",
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43 "ElementDeclHandler",
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44 "AttlistDeclHandler"
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45 ]
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46
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47 def __init__(self, encoding=None):
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48 self.parser = p = self.createParser()
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49 if self.ordered_attributes:
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50 try:
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51 self.parser.ordered_attributes = self.ordered_attributes
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52 except AttributeError:
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53 zLOG.LOG("TAL.XMLParser", zLOG.INFO,
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54 "Can't set ordered_attributes")
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55 self.ordered_attributes = 0
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56 for name in self.handler_names:
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57 method = getattr(self, name, None)
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58 if method is not None:
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59 try:
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60 setattr(p, name, method)
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61 except AttributeError:
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62 zLOG.LOG("TAL.XMLParser", zLOG.PROBLEM,
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63 "Can't set expat handler %s" % name)
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64
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65 def createParser(self, encoding=None):
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66 global XMLParseError
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67 try:
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68 from Products.ParsedXML.Expat import pyexpat
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69 XMLParseError = pyexpat.ExpatError
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70 return pyexpat.ParserCreate(encoding, ' ')
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71 except ImportError:
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72 from xml.parsers import expat
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73 XMLParseError = expat.ExpatError
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74 return expat.ParserCreate(encoding, ' ')
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75
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76 def parseFile(self, filename):
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77 self.parseStream(open(filename))
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78
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79 def parseString(self, s):
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80 self.parser.Parse(s, 1)
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81
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82 def parseURL(self, url):
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83 import urllib
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84 self.parseStream(urllib.urlopen(url))
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85
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86 def parseStream(self, stream):
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87 self.parser.ParseFile(stream)
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88
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89 def parseFragment(self, s, end=0):
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90 self.parser.Parse(s, end)
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