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"""
Some utilities for use with xmlproc.
$Id: utils.py,v 1.7 2002/05/01 09:02:37 loewis Exp $
"""
import xmlapp, sys, string, types
replace = string.replace
if sys.platform[ : 4] == "java":
from java.lang import Exception
try:
from codecs import EncodedFile
except ImportError, e:
# if we are on Python 1.5
def EncodedFile(file, encoding):
return file
# --- XMLParseException
class XMLParseException(Exception):
pass
# --- ErrorPrinter
class ErrorPrinter(xmlapp.ErrorHandler):
"""An error handler that prints out warning messages."""
def __init__(self, locator, level = 0, out = sys.stderr):
xmlapp.ErrorHandler.__init__(self, locator)
self.level = level
self.out = out
def warning(self,msg):
if self.level < 1:
self.out.write("WARNING: %s at %s\n" % (msg,self.__get_location()))
def error(self,msg):
if self.level < 2:
self.out.write("ERROR: %s at %s\n" % (msg,self.__get_location()))
def fatal(self,msg):
self.out.write("ERROR: %s at %s\n" % (msg,self.__get_location()))
def __get_location(self):
return "%s:%d:%d" % (self.locator.get_current_sysid(),
self.locator.get_line(),
self.locator.get_column())
# --- ErrorRaiser
class ErrorRaiser(xmlapp.ErrorHandler):
"""An error handler that raises exceptions."""
def __init__(self, locator = None, level = 0):
xmlapp.ErrorHandler.__init__(self, locator)
self.level = level
def warning(self, msg):
if self.level < 1:
raise XMLParseException(msg)
def error(self, msg):
if self.level < 2:
raise XMLParseException(msg)
def fatal(self, msg):
raise XMLParseException(msg)
# --- ErrorCounter
class ErrorCounter(xmlapp.ErrorHandler):
"""An error handler that counts errors."""
def __init__(self, locator = None):
xmlapp.ErrorHandler.__init__(self, locator)
self.reset()
def reset(self):
self.warnings=0
self.errors =0
self.fatals =0
def warning(self,msg):
self.warnings=self.warnings+1
def error(self,msg):
self.errors=self.errors+1
def fatal(self,msg):
self.fatals=self.fatals+1
# --- ESIS document handler
class ESISDocHandler(xmlapp.Application):
def __init__(self,writer=sys.stdout):
self.writer=writer
def handle_pi(self,target,data):
self.writer.write("?"+target+" "+data+"\n")
def handle_start_tag(self,name,amap):
self.writer.write("("+name+"\n")
for a_name in amap.keys():
self.writer.write("A"+a_name+" "+amap[a_name]+"\n")
def handle_end_tag(self,name):
self.writer.write(")"+name+"\n")
def handle_data(self,data,start_ix,end_ix):
self.writer.write("-"+data[start_ix:end_ix]+"\n")
# --- XML canonizer
class Canonizer(xmlapp.Application):
def __init__(self,writer=sys.stdout):
self.elem_level=0
self.writer=writer
def handle_pi(self,target, remainder):
if target!="xml":
self.writer.write("<?"+target+" "+remainder+"?>")
def handle_start_tag(self,name,amap):
self.writer.write("<"+name)
a_names=amap.keys()
a_names.sort()
for a_name in a_names:
self.writer.write(" "+a_name+"=\"")
self.write_data(amap[a_name])
self.writer.write("\"")
self.writer.write(">")
self.elem_level=self.elem_level+1
def handle_end_tag(self,name):
self.writer.write("</"+name+">")
self.elem_level=self.elem_level-1
def handle_ignorable_data(self,data,start_ix,end_ix):
self.write_data(data[start_ix:end_ix])
def handle_data(self,data,start_ix,end_ix):
if self.elem_level>0:
self.write_data(data[start_ix:end_ix])
def write_data(self,data):
data=replace(data,"&","&")
data=replace(data,"<","<")
data=replace(data,"\"",""")
data=replace(data,">",">")
data=replace(data,chr(9),"	")
data=replace(data,chr(10)," ")
data=replace(data,chr(13)," ")
self.writer.write(data)
# --- DocGenerator
def escape_content(str):
return replace(replace(str, "&", "&"), "<", "<")
def escape_attval(str):
return replace(replace(replace(str, "&", "&"), "<", "<"), '"',
""")
class DocGenerator(xmlapp.Application):
def __init__(self, out = None):
if not out:
self.out = EncodedFile(sys.stdout, "utf-8")
else:
self.out = out
def handle_pi(self, target, remainder):
self.out.write("<?%s %s?>" % (target, remainder))
def handle_start_tag(self,name,amap):
self.out.write("<"+name)
for (name, value) in amap.items():
self.out.write(' %s="%s"' % (name, escape_attval(value)))
self.out.write(">")
def handle_end_tag(self,name):
self.out.write("</%s>" % name)
def handle_ignorable_data(self,data,start_ix,end_ix):
self.out.write(escape_content(data[start_ix:end_ix]))
def handle_data(self,data,start_ix,end_ix):
self.out.write(escape_content(data[start_ix:end_ix]))
# --- DictResolver
class DictResolver(xmlapp.PubIdResolver):
def __init__(self, mapping = None):
if mapping == None:
mapping = {}
self.mapping = mapping
def resolve_pe_pubid(self, pubid, sysid):
return self.mapping.get(pubid, sysid)
def resolve_doctype_pubid(self, pubid, sysid):
return self.mapping.get(pubid, sysid)
def resolve_entity_pubid(self, pubid, sysid):
return self.mapping.get(pubid, sysid)
# --- Location
class Location:
def __init__(self, locator):
self._sysid = locator.get_current_sysid()
self._line = locator.get_line()
self._column = locator.get_column()
def get_sysid(self):
return self._sysid
def get_line(self):
return self._line
def get_column(self):
return self._column
def __str__(self):
return "%s:%s:%s" % (self._sysid, self._line, self._column)
# --- Various DTD and validation tools
def load_dtd(sysid):
import dtdparser,xmldtd
dp=dtdparser.DTDParser()
dtd=xmldtd.CompleteDTD(dp)
dp.set_dtd_consumer(dtd)
dp.parse_resource(sysid)
return dtd
def validate_doc(dtd,sysid):
import xmlval
parser=xmlval.XMLValidator()
parser.dtd=dtd # FIXME: what to do if there is a !DOCTYPE?
parser.set_error_handler(ErrorPrinter(parser))
parser.parse_resource(sysid)
#dtd.rollback_changes()
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