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annotate roundup/cgi/TAL/XMLParser.py @ 1049:b9988e118055

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author Richard Jones <richard@users.sourceforge.net>
date Thu, 05 Sep 2002 00:37:09 +0000
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children c08b3820edd1
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1049
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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 class XMLParser:
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19
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20 ordered_attributes = 0
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21
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22 handler_names = [
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23 "StartElementHandler",
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24 "EndElementHandler",
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25 "ProcessingInstructionHandler",
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26 "CharacterDataHandler",
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27 "UnparsedEntityDeclHandler",
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28 "NotationDeclHandler",
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29 "StartNamespaceDeclHandler",
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30 "EndNamespaceDeclHandler",
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31 "CommentHandler",
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32 "StartCdataSectionHandler",
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33 "EndCdataSectionHandler",
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34 "DefaultHandler",
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35 "DefaultHandlerExpand",
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36 "NotStandaloneHandler",
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37 "ExternalEntityRefHandler",
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38 "XmlDeclHandler",
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39 "StartDoctypeDeclHandler",
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40 "EndDoctypeDeclHandler",
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41 "ElementDeclHandler",
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42 "AttlistDeclHandler"
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43 ]
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44
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45 def __init__(self, encoding=None):
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46 self.parser = p = self.createParser()
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47 if self.ordered_attributes:
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48 try:
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49 self.parser.ordered_attributes = self.ordered_attributes
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50 except AttributeError:
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51 #zLOG.LOG("TAL.XMLParser", zLOG.INFO,
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52 # "Can't set ordered_attributes")
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53 self.ordered_attributes = 0
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54 for name in self.handler_names:
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55 method = getattr(self, name, None)
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56 if method is not None:
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57 try:
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58 setattr(p, name, method)
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59 except AttributeError:
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60 #zLOG.LOG("TAL.XMLParser", zLOG.PROBLEM,
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61 # "Can't set expat handler %s" % name)
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62 pass
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63
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64 def createParser(self, encoding=None):
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65 global XMLParseError
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66 try:
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67 from Products.ParsedXML.Expat import pyexpat
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68 XMLParseError = pyexpat.ExpatError
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69 return pyexpat.ParserCreate(encoding, ' ')
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70 except ImportError:
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71 from xml.parsers import expat
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72 XMLParseError = expat.ExpatError
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73 return expat.ParserCreate(encoding, ' ')
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74
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75 def parseFile(self, filename):
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76 self.parseStream(open(filename))
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77
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78 def parseString(self, s):
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79 self.parser.Parse(s, 1)
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80
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81 def parseURL(self, url):
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82 import urllib
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83 self.parseStream(urllib.urlopen(url))
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84
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85 def parseStream(self, stream):
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86 self.parser.ParseFile(stream)
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87
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88 def parseFragment(self, s, end=0):
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89 self.parser.Parse(s, end)
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