SAX driver for the pyexpat C module.
| 79 | # --- ExpatParser |
| 80 | |
| 81 | class ExpatParser(xmlreader.IncrementalParser, xmlreader.Locator): |
| 82 | """SAX driver for the pyexpat C module.""" |
| 83 | |
| 84 | def __init__(self, namespaceHandling=0, bufsize=2**16-20): |
| 85 | xmlreader.IncrementalParser.__init__(self, bufsize) |
| 86 | self._source = xmlreader.InputSource() |
| 87 | self._parser = None |
| 88 | self._namespaces = namespaceHandling |
| 89 | self._lex_handler_prop = None |
| 90 | self._parsing = False |
| 91 | self._entity_stack = [] |
| 92 | self._external_ges = 0 |
| 93 | self._interning = None |
| 94 | |
| 95 | # XMLReader methods |
| 96 | |
| 97 | def parse(self, source): |
| 98 | "Parse an XML document from a URL or an InputSource." |
| 99 | source = saxutils.prepare_input_source(source) |
| 100 | |
| 101 | self._source = source |
| 102 | try: |
| 103 | self.reset() |
| 104 | self._cont_handler.setDocumentLocator(ExpatLocator(self)) |
| 105 | xmlreader.IncrementalParser.parse(self, source) |
| 106 | except: |
| 107 | # bpo-30264: Close the source on error to not leak resources: |
| 108 | # xml.sax.parse() doesn't give access to the underlying parser |
| 109 | # to the caller |
| 110 | self._close_source() |
| 111 | raise |
| 112 | |
| 113 | def prepareParser(self, source): |
| 114 | if source.getSystemId() is not None: |
| 115 | self._parser.SetBase(source.getSystemId()) |
| 116 | |
| 117 | # Redefined setContentHandler to allow changing handlers during parsing |
| 118 | |
| 119 | def setContentHandler(self, handler): |
| 120 | xmlreader.IncrementalParser.setContentHandler(self, handler) |
| 121 | if self._parsing: |
| 122 | self._reset_cont_handler() |
| 123 | |
| 124 | def getFeature(self, name): |
| 125 | if name == feature_namespaces: |
| 126 | return self._namespaces |
| 127 | elif name == feature_string_interning: |
| 128 | return self._interning is not None |
| 129 | elif name in (feature_validation, feature_external_pes, |
| 130 | feature_namespace_prefixes): |
| 131 | return 0 |
| 132 | elif name == feature_external_ges: |
| 133 | return self._external_ges |
| 134 | raise SAXNotRecognizedException("Feature '%s' not recognized" % name) |
| 135 | |
| 136 | def setFeature(self, name, state): |
| 137 | if self._parsing: |
| 138 | raise SAXNotSupportedException("Cannot set features while parsing") |