Source code for xml.sax

"""Simple API for XML (SAX) implementation for Python.

This module provides an implementation of the SAX 2 interface;
information about the Java version of the interface can be found at
http://www.megginson.com/SAX/.  The Python version of the interface is
documented at <...>.

This package contains the following modules:

handler -- Base classes and constants which define the SAX 2 API for
           the 'client-side' of SAX for Python.

saxutils -- Implementation of the convenience classes commonly used to
            work with SAX.

xmlreader -- Base classes and constants which define the SAX 2 API for
             the parsers used with SAX for Python.

expatreader -- Driver that allows use of the Expat parser with SAX.
"""

from xmlreader import InputSource
from handler import ContentHandler, ErrorHandler
from _exceptions import SAXException, SAXNotRecognizedException, \
                        SAXParseException, SAXNotSupportedException, \
                        SAXReaderNotAvailable


[docs]def parse(source, handler, errorHandler=ErrorHandler()): parser = make_parser() parser.setContentHandler(handler) parser.setErrorHandler(errorHandler) parser.parse(source)
[docs]def parseString(string, handler, errorHandler=ErrorHandler()): try: from cStringIO import StringIO except ImportError: from StringIO import StringIO if errorHandler is None: errorHandler = ErrorHandler() parser = make_parser() parser.setContentHandler(handler) parser.setErrorHandler(errorHandler) inpsrc = InputSource() inpsrc.setByteStream(StringIO(string)) parser.parse(inpsrc)
# this is the parser list used by the make_parser function if no # alternatives are given as parameters to the function default_parser_list = ["xml.sax.expatreader"] # tell modulefinder that importing sax potentially imports expatreader _false = 0 if _false: import xml.sax.expatreader import os, sys if "PY_SAX_PARSER" in os.environ: default_parser_list = os.environ["PY_SAX_PARSER"].split(",") del os _key = "python.xml.sax.parser" if sys.platform[:4] == "java" and sys.registry.containsKey(_key): default_parser_list = sys.registry.getProperty(_key).split(",")
[docs]def make_parser(parser_list = []): """Creates and returns a SAX parser. Creates the first parser it is able to instantiate of the ones given in the list created by doing parser_list + default_parser_list. The lists must contain the names of Python modules containing both a SAX parser and a create_parser function.""" for parser_name in parser_list + default_parser_list: try: return _create_parser(parser_name) except ImportError,e: import sys if parser_name in sys.modules: # The parser module was found, but importing it # failed unexpectedly, pass this exception through raise except SAXReaderNotAvailable: # The parser module detected that it won't work properly, # so try the next one pass raise SAXReaderNotAvailable("No parsers found", None)
# --- Internal utility methods used by make_parser if sys.platform[ : 4] == "java": def _create_parser(parser_name): from org.python.core import imp drv_module = imp.importName(parser_name, 0, globals()) return drv_module.create_parser() else: def _create_parser(parser_name): drv_module = __import__(parser_name,{},{},['create_parser']) return drv_module.create_parser() del sys