Viewing file:  drv_xmldc.py (3.6 KB) -rw-r--r--
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"""
SAX driver for Dan Connollys XML scanner. Should work with Python 1.4.
"""
version="0.10"
import sys,urllib2,re,string
if sys.version[:3]<"1.5":
import saxlib
else:
from xml.sax import saxlib
import xml_dc
reg_ws="[\n\r\t ]+"
predef_ents={"lt":"<","gt":"<","amp":"&","apos":"'","quot":'"'}
# --- Driver
class SAX_xmldc(saxlib.Parser,saxlib.Locator):
def __init__(self):
saxlib.Parser.__init__(self)
self.current_sysid=""
self.reset()
# --- Parser methods
def parse(self, systemId):
try:
self.current_sysid=systemId
infile=urllib2.urlopen(systemId)
self.parseFile(infile)
finally:
self.current_sysid=""
def parseFile(self, fileobj):
self.doc_handler.setDocumentLocator(self)
self.reset()
try:
while 1:
buf=fileobj.read(16384)
if buf=="":
break
self.feed(buf)
self.close()
except xml_dc.ScanError,e:
self.err_handler.fatalError(saxlib.SAXParseException(e,None,self))
except xml_dc.NotWellFormed,e:
self.err_handler.fatalError(saxlib.SAXParseException(e,None,self))
# --- Passing on parse events to document handler
def text(self, str):
self.doc_handler.characters(str,0,len(str))
def openStart(self, name):
self.current_elem=name
self.current_attrs_val={}
self.current_attrs_type={}
def attribute(self, name, type, value):
self.current_attrs_val[name]=value
self.current_attrs_type[name]=type
def closeStart(self):
self.doc_handler.startElement(self.current_elem,
self.current_attrs_val)
def closeEmpty(self):
self.doc_handler.startElement(self.current_elem,
self.current_attrs_val)
self.doc_handler.endElement(self.current_elem)
def endTag(self, name=None):
self.doc_handler.endElement(name)
def comment(self, stuff):
pass
def pi(self, stuff):
match=re.search(reg_ws,stuff)
if not match:
self.doc_handler.processingInstruction(stuff,"")
else:
end_of_target,start_of_data=match.span()
self.doc_handler.processingInstruction(stuff[:end_of_target],
stuff[start_of_data:])
def decl(self, name, parts):
pass
def cref(self, numeral):
numeral=string.atoi(numeral)
self.doc_handler.characters(chr(numeral),0,1)
def eref(self, name):
pass
def eof(self):
pass
# --- Locator methods
def getLineNumber(self):
return self.parser.line()
def getSystemId(self):
return self.current_sysid
# --- EXPERIMENTAL PYTHON SAX EXTENSIONS
def get_parser_name(self):
return "xmldc"
def get_parser_version(self):
return "1.8"
def get_driver_version(self):
return version
def is_validating(self):
return 0
def is_dtd_reading(self):
return 0
def reset(self):
self.parser=xml_dc.Scanner()
self.checker=xml_dc.WellFormed()
self.checker.scanner(self.parser)
self.unfed_so_far=1
def feed(self,data):
if self.unfed_so_far:
self.doc_handler.startDocument()
self.unfed_so_far=0
self.parser.feed(data)
self.parser.next(self)
def close(self):
self.checker.eof()
self.doc_handler.endDocument()
# ---
def create_parser():
return SAX_xmldc()
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