"""A parser for XML, using the derived class as static DTD."""
# Author: Sjoerd Mullender.
import re
import string
version = '0.3'
# Regular expressions used for parsing
_S = '[ \t\r\n]+' # white space
_opS = '[ \t\r\n]*' # optional white space
_Name = '[a-zA-Z_:][-a-zA-Z0-9._:]*' # valid XML name
_QStr = "(?:'[^']*'|\"[^\"]*\")" # quoted XML string
illegal = re.compile('[^\t\r\n -\176\240-\377]') # illegal chars in content
interesting = re.compile('[]&<]')
amp = re.compile('&')
ref = re.compile('&(' + _Name + '|#[0-9]+|#x[0-9a-fA-F]+)[^-a-zA-Z0-9._:]')
entityref = re.compile('&(?P<name>' + _Name + ')[^-a-zA-Z0-9._:]')
charref = re.compile('&#(?P<char>[0-9]+[^0-9]|x[0-9a-fA-F]+[^0-9a-fA-F])')
space = re.compile(_S + '$')
newline = re.compile('\n')
attrfind = re.compile(
_S + '(?P<name>' + _Name + ')'
'(' + _opS + '=' + _opS +
'(?P<value>'+_QStr+'|[-a-zA-Z0-9.:+*%?!()_#=~]+))?')
starttagopen = re.compile('<' + _Name)
starttagend = re.compile(_opS + '(?P<slash>/?)>')
starttagmatch = re.compile('<(?P<tagname>'+_Name+')'
'(?P<attrs>(?:'+attrfind.pattern+')*)'+
starttagend.pattern)
endtagopen = re.compile('</')
endbracket = re.compile(_opS + '>')
endbracketfind = re.compile('(?:[^>\'"]|'+_QStr+')*>')
tagfind = re.compile(_Name)
cdataopen = re.compile(r'<!\[CDATA\[')
cdataclose = re.compile(r'\]\]>')
# this matches one of the following:
# SYSTEM SystemLiteral
# PUBLIC PubidLiteral SystemLiteral
_SystemLiteral = '(?P<%s>'+_QStr+')'
_PublicLiteral = '(?P<%s>"[-\'()+,./:=?;!*#@$_%% \n\ra-zA-Z0-9]*"|' \
"'[-()+,./:=?;!*#@$_%% \n\ra-zA-Z0-9]*')"
_ExternalId = '(?:SYSTEM|' \
'PUBLIC'+_S+_PublicLiteral%'pubid'+ \
')'+_S+_SystemLiteral%'syslit'
doctype = re.compile('<!DOCTYPE'+_S+'(?P<name>'+_Name+')'
'(?:'+_S+_ExternalId+')?'+_opS)
xmldecl = re.compile('<\?xml'+_S+
'version'+_opS+'='+_opS+'(?P<version>'+_QStr+')'+
'(?:'+_S+'encoding'+_opS+'='+_opS+
"(?P<encoding>'[A-Za-z][-A-Za-z0-9._]*'|"
'"[A-Za-z][-A-Za-z0-9._]*"))?'
'(?:'+_S+'standalone'+_opS+'='+_opS+
'(?P<standalone>\'(?:yes|no)\'|"(?:yes|no)"))?'+
_opS+'\?>')
procopen = re.compile(r'<\?(?P<proc>' + _Name + ')' + _opS)
procclose = re.compile(_opS + r'\?>')
commentopen = re.compile('<!--')
commentclose = re.compile('-->')
doubledash = re.compile('--')
attrtrans = string.maketrans(' \r\n\t', ' ')
# definitions for XML namespaces
_NCName = '[a-zA-Z_][-a-zA-Z0-9._]*' # XML Name, minus the ":"
ncname = re.compile(_NCName + '$')
qname = re.compile('(?:(?P<prefix>' + _NCName + '):)?' # optional prefix
'(?P<local>' + _NCName + ')$')
xmlns = re.compile('xmlns(?::(?P<ncname>'+_NCName+'))?$')
# XML parser base class -- find tags and call handler functions.
# Usage: p = XMLParser(); p.feed(data); ...; p.close().
# The dtd is defined by deriving a class which defines methods with
# special names to handle tags: start_foo and end_foo to handle <foo>
# and </foo>, respectively. The data between tags is passed to the
# parser by calling self.handle_data() with some data as argument (the
# data may be split up in arbutrary chunks).
class XMLParser:
attributes = {} # default, to be overridden
elements = {} # default, to be overridden
# parsing options, settable using keyword args in __init__
__accept_unquoted_attributes = 0
__accept_missing_endtag_name = 0
__map_case = 0
__accept_utf8 = 0
# Interface -- initialize and reset this instance
def __init__(self, **kw):
self.__fixed = 0
if kw.has_key('accept_unquoted_attributes'):
self.__accept_unquoted_attributes = kw['accept_unquoted_attributes']
if kw.has_key('accept_missing_endtag_name'):
self.__accept_missing_endtag_name = kw['accept_missing_endtag_name']
if kw.has_key('map_case'):
self.__map_case = kw['map_case']
if kw.has_key('accept_utf8'):
self.__accept_utf8 = kw['accept_utf8']
self.reset()
def __fixelements(self):
self.__fixed = 1
self.elements = {}
self.__fixdict(self.__dict__)
self.__fixclass(self.__class__)
def __fixclass(self, kl):
self.__fixdict(kl.__dict__)
for k in kl.__bases__:
self.__fixclass(k)
def __fixdict(self, dict):
for key in dict.keys():
if key[:6] == 'start_':
tag = key[6:]
start, end = self.elements.get(tag, (None, None))
if start is None:
self.elements[tag] = getattr(self, key), end
elif key[:4] == 'end_':
tag = key[4:]
start, end = self.elements.get(tag, (None, None))
if end is None:
self.elements[tag] = start, getattr(self, key)
# Interface -- reset this instance. Loses all unprocessed data
def reset(self):
self.rawdata = ''
self.stack = []
self.nomoretags = 0
self.literal = 0
self.lineno = 1
self.__at_start = 1
self.__seen_doctype = None
self.__seen_starttag = 0
self.__use_namespaces = 0
self.__namespaces = {'xml':None} # xml is implicitly declared
# backward compatipibility hack: if elements not overridden,
# fill it in ourselves
if self.elements is XMLParser.elements:
self.__fixelements()
# For derived classes only -- enter literal mode (CDATA) till EOF
def setnomoretags(self):
self.nomoretags = self.literal = 1
# For derived classes only -- enter literal mode (CDATA)
def setliteral(self, *args):
self.literal = 1
# Interface -- feed some data to the parser. Call this as
# often as you want, with as little or as much text as you
# want (may include '\n'). (This just saves the text, all the
# processing is done by goahead().)
def feed(self, data):
self.rawdata = self.rawdata + data
self.goahead(0)
# Interface -- handle the remaining data
def close(self):
self.goahead(1)
if self.__fixed:
self.__fixed = 0
# remove self.elements so that we don't leak
del self.elements
# Interface -- translate references
def translate_references(self, data, all = 1):
i = 0
while 1:
res = amp.search(data, i)
if res is None:
return data
res = ref.match(data, res.start(0))
if res is None:
self.syntax_error("bogus `&'")
i =i+1
continue
i = res.end(0)
if data[i - 1] != ';':
self.syntax_error("`;' missing after entity/char reference")
i = i-1
str = res.group(1)
pre = data[:res.start(0)]
post = data[i:]
if str[0] == '#':
if str[1] == 'x':
str = chr(string.atoi(str[2:], 16))
else:
str = chr(string.atoi(str[1:]))
data = pre + str + post
i = res.start(0)+len(str)
elif all:
if self.entitydefs.has_key(str):
data = pre + self.entitydefs[str] + post
i = res.start(0) # rescan substituted text
else:
self.syntax_error("reference to unknown entity `&%s;'" % str)
# can't do it, so keep the entity ref in
data = pre + '&' + str + ';' + post
i = res.start(0) + len(str) + 2
else:
# just translating character references
pass # i is already postioned correctly
# Internal -- handle data as far as reasonable. May leave state
# and data to be processed by a subsequent call. If 'end' is
# true, force handling all data as if followed by EOF marker.
def goahead(self, end):
rawdata = self.rawdata
i = 0
n = len(rawdata)
while i < n:
if i > 0:
self.__at_start = 0
if self.nomoretags:
data = rawdata[i:n]
self.handle_data(data)
self.lineno = self.lineno + string.count(data, '\n')
i = n
break
res = interesting.search(rawdata, i)
if res:
j = res.start(0)
else:
j = n
if i < j:
data = rawdata[i:j]
if self.__at_start and space.match(data) is None:
self.syntax_error('illegal data at start of file')
self.__at_start = 0
if not self.stack and space.match(data) is None:
self.syntax_error('data not in content')
if not self.__accept_utf8 and illegal.search(data):
self.syntax_error('illegal character in content')
self.handle_data(data)
self.lineno = self.lineno + string.count(data, '\n')
i = j
if i == n: break
if rawdata[i] == '<':
if starttagopen.match(rawdata, i):
if self.literal:
data = rawdata[i]
self.handle_data(data)
self.lineno = self.lineno + string.count(data, '\n')
i = i+1
continue
k = self.parse_starttag(i)
if k < 0: break
self.__seen_starttag = 1
self.lineno = self.lineno + string.count(rawdata[i:k], '\n')
i = k
continue
if endtagopen.match(rawdata, i):
k = self.parse_endtag(i)
if k < 0: break
self.lineno = self.lineno + string.count(rawdata[i:k], '\n')
i = k
continue
if commentopen.match(rawdata, i):
if self.literal:
data = rawdata[i]
self.handle_data(data)
self.lineno = self.lineno + string.count(data, '\n')
i = i+1
continue
k = self.parse_comment(i)
if k < 0: break
self.lineno = self.lineno + string.count(rawdata[i:k], '\n')
i = k
continue
if cdataopen.match(rawdata, i):
k = self.parse_cdata(i)
if k < 0: break
self.lineno = self.lineno + string.count(rawdata[i:i], '\n')
i = k
continue
res = xmldecl.match(rawdata, i)
if res:
if not self.__at_start:
self.syntax_error("<?xml?> declaration not at start of document")
version, encoding, standalone = res.group('version',
'encoding',
'standalone')
if version[1:-1] != '1.0':
raise RuntimeError, 'only XML version 1.0 supported'
if encoding: encoding = encoding[1:-1]
if standalone: standalone = standalone[1:-1]
self.handle_xml(encoding, standalone)
i = res.end(0)
continue
res = procopen.match(rawdata, i)
if res:
k = self.parse_proc(i)
if k < 0: break
self.lineno = self.lineno + string.count(rawdata[i:k], '\n')
i = k
continue
res = doctype.match(rawdata, i)
if res:
if self.literal:
data = rawdata[i]
self.handle_data(data)
self.lineno = self.lineno + string.count(data, '\n')
i = i+1
continue
if self.__seen_doctype:
self.syntax_error('multiple DOCTYPE elements')
if self.__seen_starttag:
self.syntax_error('DOCTYPE not at beginning of document')
k = self.parse_doctype(res)
if k < 0: break
self.__seen_doctype = res.group('name')
if self.__map_case:
self.__seen_doctype = string.lower(self.__seen_doctype)
self.lineno = self.lineno + string.count(rawdata[i:k], '\n')
i = k
continue
elif rawdata[i] == '&':
if self.literal:
data = rawdata[i]
self.handle_data(data)
i = i+1
continue
res = charref.match(rawdata, i)
if res is not None:
i = res.end(0)
if rawdata[i-1] != ';':
self.syntax_error("`;' missing in charref")
i = i-1
if not self.stack:
self.syntax_error('data not in content')
self.handle_charref(res.group('char')[:-1])
self.lineno = self.lineno + string.count(res.group(0), '\n')
continue
res = entityref.match(rawdata, i)
if res is not None:
i = res.end(0)
if rawdata[i-1] != ';':
self.syntax_error("`;' missing in entityref")
i = i-1
name = res.group('name')
if self.__map_case:
name = string.lower(name)
if self.entitydefs.has_key(name):
self.rawdata = rawdata = rawdata[:res.start(0)] + self.entitydefs[name] + rawdata[i:]
n = len(rawdata)
i = res.start(0)
else:
self.unknown_entityref(name)
self.lineno = self.lineno + string.count(res.group(0), '\n')
continue
elif rawdata[i] == ']':
if self.literal:
data = rawdata[i]
self.handle_data(data)
i = i+1
continue
if n-i < 3:
break
if cdataclose.match(rawdata, i):
self.syntax_error("bogus `]]>'")
self.handle_data(rawdata[i])
i = i+1
continue
else:
raise RuntimeError, 'neither < nor & ??'
# We get here only if incomplete matches but
# nothing else
break
# end while
if i > 0:
self.__at_start = 0
if end and i < n:
data = rawdata[i]
self.syntax_error("bogus `%s'" % data)
if not self.__accept_utf8 and illegal.search(data):
self.syntax_error('illegal character in content')
self.handle_data(data)
self.lineno = self.lineno + string.count(data, '\n')
self.rawdata = rawdata[i+1:]
return self.goahead(end)
self.rawdata = rawdata[i:]
if end:
if not self.__seen_starttag:
self.syntax_error('no elements in file')
if self.stack:
self.syntax_error('missing end tags')
while self.stack:
self.finish_endtag(self.stack[-1][0])
# Internal -- parse comment, return length or -1 if not terminated
def parse_comment(self, i):
rawdata = self.rawdata
if rawdata[i:i+4] <> '<!--':
raise RuntimeError, 'unexpected call to handle_comment'
res = commentclose.search(rawdata, i+4)
if res is None:
return -1
if doubledash.search(rawdata, i+4, res.start(0)):
self.syntax_error("`--' inside comment")
if rawdata[res.start(0)-1] == '-':
self.syntax_error('comment cannot end in three dashes')
if not self.__accept_utf8 and \
illegal.search(rawdata, i+4, res.start(0)):
self.syntax_error('illegal character in comment')
self.handle_comment(rawdata[i+4: res.start(0)])
return res.end(0)
# Internal -- handle DOCTYPE tag, return length or -1 if not terminated
def parse_doctype(self, res):
rawdata = self.rawdata
n = len(rawdata)
name = res.group('name')
if self.__map_case:
name = string.lower(name)
pubid, syslit = res.group('pubid', 'syslit')
if pubid is not None:
pubid = pubid[1:-1] # remove quotes
pubid = string.join(string.split(pubid)) # normalize
if syslit is not None: syslit = syslit[1:-1] # remove quotes
j = k = res.end(0)
if k >= n:
return -1
if rawdata[k] == '[':
level = 0
k = k+1
dq = sq = 0
while k < n:
c = rawdata[k]
if not sq and c == '"':
dq = not dq
elif not dq and c == "'":
sq = not sq
elif sq or dq:
pass
elif level <= 0 and c == ']':
res = endbracket.match(rawdata, k+1)
if res is None:
return -1
self.handle_doctype(name, pubid, syslit, rawdata[j+1:k])
return res.end(0)
elif c == '<':
level = level + 1
elif c == '>':
level = level - 1
if level < 0:
self.syntax_error("bogus `>' in DOCTYPE")
k = k+1
res = endbracketfind.match(rawdata, k)
if res is None:
return -1
if endbracket.match(rawdata, k) is None:
self.syntax_error('garbage in DOCTYPE')
self.handle_doctype(name, pubid, syslit, None)
return res.end(0)
# Internal -- handle CDATA tag, return length or -1 if not terminated
def parse_cdata(self, i):
rawdata = self.rawdata
if rawdata[i:i+9] <> '<![CDATA[':
raise RuntimeError, 'unexpected call to parse_cdata'
res = cdataclose.search(rawdata, i+9)
if res is None:
return -1
if not self.__accept_utf8 and \
illegal.search(rawdata, i+9, res.start(0)):
self.syntax_error('illegal character in CDATA')
if not self.stack:
self.syntax_error('CDATA not in content')
self.handle_cdata(rawdata[i+9:res.start(0)])
return res.end(0)
__xml_namespace_attributes = {'ns':None, 'src':None, 'prefix':None}
# Internal -- handle a processing instruction tag
def parse_proc(self, i):
rawdata = self.rawdata
end = procclose.search(rawdata, i)
if end is None:
return -1
j = end.start(0)
if not self.__accept_utf8 and illegal.search(rawdata, i+2, j):
self.syntax_error('illegal character in processing instruction')
res = tagfind.match(rawdata, i+2)
if res is None:
raise RuntimeError, 'unexpected call to parse_proc'
k = res.end(0)
name = res.group(0)
if self.__map_case:
name = string.lower(name)
if name == 'xml:namespace':
self.syntax_error('old-fashioned namespace declaration')
self.__use_namespaces = -1
# namespace declaration
# this must come after the <?xml?> declaration (if any)
# and before the <!DOCTYPE> (if any).
if self.__seen_doctype or self.__seen_starttag:
self.syntax_error('xml:namespace declaration too late in document')
attrdict, namespace, k = self.parse_attributes(name, k, j)
if namespace:
self.syntax_error('namespace declaration inside namespace declaration')
for attrname in attrdict.keys():
if not self.__xml_namespace_attributes.has_key(attrname):
self.syntax_error("unknown attribute `%s' in xml:namespace tag" % attrname)
if not attrdict.has_key('ns') or not attrdict.has_key('prefix'):
self.syntax_error('xml:namespace without required attributes')
prefix = attrdict.get('prefix')
if ncname.match(prefix) is None:
self.syntax_error('xml:namespace illegal prefix value')
return end.end(0)
if self.__namespaces.has_key(prefix):
self.syntax_error('xml:namespace prefix not unique')
self.__namespaces[prefix] = attrdict['ns']
else:
if string.lower(name) == 'xml':
self.syntax_error('illegal processing instruction target name')
self.handle_proc(name, rawdata[k:j])
return end.end(0)
# Internal -- parse attributes between i and j
def parse_attributes(self, tag, i, j):
rawdata = self.rawdata
attrdict = {}
namespace = {}
while i < j:
res = attrfind.match(rawdata, i)
if res is None:
break
attrname, attrvalue = res.group('name', 'value')
if self.__map_case:
attrname = string.lower(attrname)
i = res.end(0)
if attrvalue is None:
self.syntax_error("no value specified for attribute `%s'" % attrname)
attrvalue = attrname
elif attrvalue[:1] == "'" == attrvalue[-1:] or \
attrvalue[:1] == '"' == attrvalue[-1:]:
attrvalue = attrvalue[1:-1]
elif not self.__accept_unquoted_attributes:
self.syntax_error("attribute `%s' value not quoted" % attrname)
res = xmlns.match(attrname)
if res is not None:
# namespace declaration
ncname = res.group('ncname')
namespace[ncname or ''] = attrvalue or None
if not self.__use_namespaces:
self.__use_namespaces = len(self.stack)+1
continue
if '<' in attrvalue:
self.syntax_error("`<' illegal in attribute value")
if attrdict.has_key(attrname):
self.syntax_error("attribute `%s' specified twice" % attrname)
attrvalue = string.translate(attrvalue, attrtrans)
attrdict[attrname] = self.translate_references(attrvalue)
return attrdict, namespace, i
# Internal -- handle starttag, return length or -1 if not terminated
def parse_starttag(self, i):
rawdata = self.rawdata
# i points to start of tag
end = endbracketfind.match(rawdata, i+1)
if end is None:
return -1
tag = starttagmatch.match(rawdata, i)
if tag is None or tag.end(0) != end.end(0):
self.syntax_error('garbage in starttag')
return end.end(0)
nstag = tagname = tag.group('tagname')
if self.__map_case:
nstag = tagname = string.lower(nstag)
if not self.__seen_starttag and self.__seen_doctype and \
tagname != self.__seen_doctype:
self.syntax_error('starttag does not match DOCTYPE')
if self.__seen_starttag and not self.stack:
self.syntax_error('multiple elements on top level')
k, j = tag.span('attrs')
attrdict, nsdict, k = self.parse_attributes(tagname, k, j)
self.stack.append((tagname, nsdict, nstag))
if self.__use_namespaces:
res = qname.match(tagname)
else:
res = None
if res is not None:
prefix, nstag = res.group('prefix', 'local')
if prefix is None:
prefix = ''
ns = None
for t, d, nst in self.stack:
if d.has_key(prefix):
ns = d[prefix]
if ns is None and prefix != '':
ns = self.__namespaces.get(prefix)
if ns is not None:
nstag = ns + ' ' + nstag
elif prefix != '':
nstag = prefix + ':' + nstag # undo split
self.stack[-1] = tagname, nsdict, nstag
# translate namespace of attributes
if self.__use_namespaces:
nattrdict = {}
for key, val in attrdict.items():
res = qname.match(key)
if res is not None:
aprefix, key = res.group('prefix', 'local')
if self.__map_case:
key = string.lower(key)
if aprefix is None:
aprefix = ''
ans = None
for t, d, nst in self.stack:
if d.has_key(aprefix):
ans = d[aprefix]
if ans is None and aprefix != '':
ans = self.__namespaces.get(aprefix)
if ans is not None:
key = ans + ' ' + key
elif aprefix != '':
key = aprefix + ':' + key
elif ns is not None:
key = ns + ' ' + key
nattrdict[key] = val
attrdict = nattrdict
attributes = self.attributes.get(nstag)
if attributes is not None:
for key in attrdict.keys():
if not attributes.has_key(key):
self.syntax_error("unknown attribute `%s' in tag `%s'" % (key, tagname))
for key, val in attributes.items():
if val is not None and not attrdict.has_key(key):
attrdict[key] = val
method = self.elements.get(nstag, (None, None))[0]
self.finish_starttag(nstag, attrdict, method)
if tag.group('slash') == '/':
self.finish_endtag(tagname)
return tag.end(0)
# Internal -- parse endtag
def parse_endtag(self, i):
rawdata = self.rawdata
end = endbracketfind.match(rawdata, i+1)
if end is None:
return -1
res = tagfind.match(rawdata, i+2)
if res is None:
if self.literal:
self.handle_data(rawdata[i])
return i+1
if not self.__accept_missing_endtag_name:
self.syntax_error('no name specified in end tag')
tag = self.stack[-1][0]
k = i+2
else:
tag = res.group(0)
if self.__map_case:
tag = string.lower(tag)
if self.literal:
if not self.stack or tag != self.stack[-1][0]:
self.handle_data(rawdata[i])
return i+1
self.literal = 0
k = res.end(0)
if endbracket.match(rawdata, k) is None:
self.syntax_error('garbage in end tag')
self.finish_endtag(tag)
return end.end(0)
# Internal -- finish processing of start tag
def finish_starttag(self, tagname, attrdict, method):
if method is not None:
self.handle_starttag(tagname, method, attrdict)
else:
self.unknown_starttag(tagname, attrdict)
# Internal -- finish processing of end tag
def finish_endtag(self, tag):
if not tag:
self.syntax_error('name-less end tag')
found = len(self.stack) - 1
if found < 0:
self.unknown_endtag(tag)
return
else:
found = -1
for i in range(len(self.stack)):
if tag == self.stack[i][0]:
found = i
if found == -1:
self.syntax_error('unopened end tag')
method = self.elements.get(tag, (None, None))[1]
if method is not None:
self.handle_endtag(tag, method)
else:
self.unknown_endtag(tag)
return
while len(self.stack) > found:
if found < len(self.stack) - 1:
self.syntax_error('missing close tag for %s' % self.stack[-1][2])
nstag = self.stack[-1][2]
method = self.elements.get(nstag, (None, None))[1]
if method is not None:
self.handle_endtag(nstag, method)
else:
self.unknown_endtag(nstag)
if self.__use_namespaces == len(self.stack):
self.__use_namespaces = 0
del self.stack[-1]
# Overridable -- handle xml processing instruction
def handle_xml(self, encoding, standalone):
pass
# Overridable -- handle DOCTYPE
def handle_doctype(self, tag, pubid, syslit, data):
pass
# Overridable -- handle start tag
def handle_starttag(self, tag, method, attrs):
method(attrs)
# Overridable -- handle end tag
def handle_endtag(self, tag, method):
method()
# Example -- handle character reference, no need to override
def handle_charref(self, name):
try:
if name[0] == 'x':
n = string.atoi(name[1:], 16)
else:
n = string.atoi(name)
except string.atoi_error:
self.unknown_charref(name)
return
if not 0 <= n <= 255:
self.unknown_charref(name)
return
self.handle_data(chr(n))
# Definition of entities -- derived classes may override
entitydefs = {'lt': '<', # must use charref
'gt': '>',
'amp': '&', # must use charref
'quot': '"',
'apos': ''',
}
# Example -- handle data, should be overridden
def handle_data(self, data):
pass
# Example -- handle cdata, could be overridden
def handle_cdata(self, data):
pass
# Example -- handle comment, could be overridden
def handle_comment(self, data):
pass
# Example -- handle processing instructions, could be overridden
def handle_proc(self, name, data):
pass
# Example -- handle relatively harmless syntax errors, could be overridden
def syntax_error(self, message):
raise RuntimeError, 'Syntax error at line %d: %s' % (self.lineno, message)
# To be overridden -- handlers for unknown objects
def unknown_starttag(self, tag, attrs): pass
def unknown_endtag(self, tag): pass
def unknown_charref(self, ref): pass
def unknown_entityref(self, name):
self.syntax_error("reference to unknown entity `&%s;'" % name)
class TestXMLParser(XMLParser):
def __init__(self, **kw):
self.testdata = ""
apply(XMLParser.__init__, (self,), kw)
def handle_xml(self, encoding, standalone):
self.flush()
print 'xml: encoding =',encoding,'standalone =',standalone
def handle_doctype(self, tag, pubid, syslit, data):
self.flush()
print 'DOCTYPE:',tag, `data`
def handle_data(self, data):
self.testdata = self.testdata + data
if len(`self.testdata`) >= 70:
self.flush()
def flush(self):
data = self.testdata
if data:
self.testdata = ""
print 'data:', `data`
def handle_cdata(self, data):
self.flush()
print 'cdata:', `data`
def handle_proc(self, name, data):
self.flush()
print 'processing:',name,`data`
def handle_comment(self, data):
self.flush()
r = `data`
if len(r) > 68:
r = r[:32] + '...' + r[-32:]
print 'comment:', r
def syntax_error(self, message):
print 'error at line %d:' % self.lineno, message
def unknown_starttag(self, tag, attrs):
self.flush()
if not attrs:
print 'start tag: <' + tag + '>'
else:
print 'start tag: <' + tag,
for name, value in attrs.items():
print name + '=' + '"' + value + '"',
print '>'
def unknown_endtag(self, tag):
self.flush()
print 'end tag: </' + tag + '>'
def unknown_entityref(self, ref):
self.flush()
print '*** unknown entity ref: &' + ref + ';'
def unknown_charref(self, ref):
self.flush()
print '*** unknown char ref: &#' + ref + ';'
def close(self):
XMLParser.close(self)
self.flush()
def test(args = None):
import sys, getopt
from time import time
if not args:
args = sys.argv[1:]
opts, args = getopt.getopt(args, 'st')
klass = TestXMLParser
do_time = 0
for o, a in opts:
if o == '-s':
klass = XMLParser
elif o == '-t':
do_time = 1
if args:
file = args[0]
else:
file = 'test.xml'
if file == '-':
f = sys.stdin
else:
try:
f = open(file, 'r')
except IOError, msg:
print file, ":", msg
sys.exit(1)
data = f.read()
if f is not sys.stdin:
f.close()
x = klass()
t0 = time()
try:
if do_time:
x.feed(data)
x.close()
else:
for c in data:
x.feed(c)
x.close()
except RuntimeError, msg:
t1 = time()
print msg
if do_time:
print 'total time: %g' % (t1-t0)
sys.exit(1)
t1 = time()
if do_time:
print 'total time: %g' % (t1-t0)
if __name__ == '__main__':
test()
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