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# A demo SAX application: using SAX to parse XML documents into ESIS
# or canonical XML.
from xml.sax import saxexts, saxlib, saxutils
import sys,urllib,getopt
### Interpreting arguments (rather crudely)
try:
(args,trail)=getopt.getopt(sys.argv[1:],"sed:")
except getopt.error,e:
print "ERROR: %s" % e
print
print "Usage: python saxdemo.py [-e] [-d drv] filename [outfilename]"
print
print " -e: Output ESIS instead of normalized XML."
print " -s: Silent (no messages except error messages)"
print " -d: Use driver 'drv', where 'drv' is a module name."
print " outfilename: Write to this file."
sys.exit(1)
driver=None
esis=0
silent=0
in_sysID=trail[0]
if len(trail)==2:
out_sysID=trail[1]
else:
out_sysID=""
for (arg,val) in args:
if arg=="-d":
driver="xml.sax.drivers.drv_" + val
elif arg=="-e":
esis=1
elif arg=="-s":
silent=1
p=saxexts.make_parser(driver)
p.setErrorHandler(saxutils.ErrorPrinter())
if out_sysID=="":
out=sys.stdout
else:
try:
out=urllib.urlopen(out_sysID)
except IOError,e:
print out_sysID+": "+str(e)
if esis:
dh=saxutils.ESISDocHandler(out)
else:
dh=saxutils.Canonizer(out)
### Ready. Let's go!
if not silent:
print "Parser: %s (%s, %s)" % (p.get_parser_name(),p.get_parser_version(),
p.get_driver_version())
print
try:
p.setDocumentHandler(dh)
p.parse(in_sysID)
except IOError,e:
print in_sysID+": "+str(e)
except saxlib.SAXException,e:
print str(e)
### Cleaning up.
out.close()
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