30 def close(self): |
30 def close(self): |
31 return False |
31 return False |
32 |
32 |
33 def formatError(self, message): |
33 def formatError(self, message): |
34 return "sbs: error: " + message + "\n" |
34 return "sbs: error: " + message + "\n" |
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35 |
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36 |
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37 import sys |
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38 import xml.sax |
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39 |
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40 class FilterSAX(Filter, xml.sax.handler.ContentHandler, xml.sax.handler.ErrorHandler): |
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41 "base class for filters using a SAX parser" |
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42 |
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43 # define these methods in your subclass |
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44 |
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45 def startDocument(self): |
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46 "called once before any elements are seen" |
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47 pass |
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48 |
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49 def startElement(self, name, attributes): |
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50 "called on the opening of any element" |
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51 pass |
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52 |
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53 def characters(self, char): |
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54 "called one or more times with body text from an element" |
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55 pass |
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56 |
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57 def endElement(self, name): |
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58 "called on the closing of any element" |
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59 pass |
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60 |
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61 def endDocument(self): |
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62 "called once when all elements are closed" |
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63 pass |
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64 |
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65 def error(self, exception): |
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66 "the parse found an error which is (possibly) recoverable" |
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67 pass |
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68 |
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69 def fatalError(self, exception): |
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70 "the parser thinks an error occurred which should stop everything" |
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71 pass |
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72 |
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73 def warning(self, exception): |
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74 "the parser found something to complain about that might not matter" |
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75 pass |
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76 |
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77 # these methods are from the Filter base class |
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78 |
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79 def open(self, params): |
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80 "initialise" |
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81 |
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82 self.params = params |
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83 self.ok = True |
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84 try: |
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85 self.parser = xml.sax.make_parser(['xml.sax.expatreader']) |
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86 self.parser.setContentHandler(self) |
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87 self.parser.setErrorHandler(self) |
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88 |
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89 except Exception, ex: |
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90 sys.stderr.write(self.formatError(str(ex))) |
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91 self.ok = False |
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92 |
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93 return self.ok |
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94 |
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95 |
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96 def write(self, text): |
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97 "process some log text" |
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98 try: |
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99 self.parser.feed(text) |
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100 except Exception, ex: |
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101 sys.stderr.write(self.formatError(str(ex))) |
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102 self.ok = False |
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103 |
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104 return self.ok |
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105 |
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106 |
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107 def close(self): |
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108 "finish off" |
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109 try: |
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110 self.parser.close() |
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111 except Exception, ex: |
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112 sys.stderr.write(self.formatError(str(ex))) |
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113 self.ok = False |
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114 |
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115 return self.ok |
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116 |
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117 |
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118 # the end |