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Commit 6f43bc67 authored by Guido van Rossum's avatar Guido van Rossum
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Sjoerd Mullender writes: 

"""
Added some optional arguments to the XMLParser __init__ method to
specify that selected non-standard constructs are to be accepted.
Also removed the documentation for handle_entityrefs since it isn't
used.
"""

The version is incremented to 0.3.
parent b819ad06
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Showing with 48 additions and 30 deletions
Lib/xmllib.py
View file @ 6f43bc67
......@@ -5,7 +5,7 @@ import re
import string
version = '0.2'
version = '0.3'
# Regular expressions used for parsing
......@@ -78,17 +78,29 @@ xmlns = re.compile('xmlns(?::(?P<ncname>'+_NCName+'))?$')
# 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). Entity references are
# passed by calling self.handle_entityref() with the entity reference
# as argument.
# 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):
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):
......@@ -223,7 +235,7 @@ class XMLParser:
self.__at_start = 0
if not self.stack and space.match(data) is None:
self.syntax_error('data not in content')
if illegal.search(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')
......@@ -303,6 +315,8 @@ class XMLParser:
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
......@@ -330,12 +344,13 @@ class XMLParser:
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.syntax_error("reference to unknown entity `&%s;'" % name)
self.unknown_entityref(name)
self.lineno = self.lineno + string.count(res.group(0), '\n')
continue
......@@ -363,7 +378,7 @@ class XMLParser:
if end and i < n:
data = rawdata[i]
self.syntax_error("bogus `%s'" % data)
if illegal.search(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')
......@@ -390,7 +405,8 @@ class XMLParser:
self.syntax_error("`--' inside comment")
if rawdata[res.start(0)-1] == '-':
self.syntax_error('comment cannot end in three dashes')
if illegal.search(rawdata, i+4, res.start(0)):
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)
......@@ -400,6 +416,8 @@ class XMLParser:
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
......@@ -449,7 +467,8 @@ class XMLParser:
res = cdataclose.search(rawdata, i+9)
if res is None:
return -1
if illegal.search(rawdata, i+9, res.start(0)):
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')
......@@ -464,13 +483,15 @@ class XMLParser:
if end is None:
return -1
j = end.start(0)
if illegal.search(rawdata, i+2, j):
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
......@@ -510,6 +531,8 @@ class XMLParser:
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)
......@@ -517,7 +540,7 @@ class XMLParser:
elif attrvalue[:1] == "'" == attrvalue[-1:] or \
attrvalue[:1] == '"' == attrvalue[-1:]:
attrvalue = attrvalue[1:-1]
else:
elif not self.__accept_unquoted_attributes:
self.syntax_error("attribute `%s' value not quoted" % attrname)
res = xmlns.match(attrname)
if res is not None:
......@@ -547,6 +570,8 @@ class XMLParser:
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')
......@@ -581,6 +606,8 @@ class XMLParser:
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
......@@ -622,11 +649,14 @@ class XMLParser:
if self.literal:
self.handle_data(rawdata[i])
return i+1
self.syntax_error('no name specified in end tag')
tag = ''
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])
......@@ -718,15 +748,6 @@ class XMLParser:
'apos': '&#39;',
}
# Example -- handle entity reference, no need to override
def handle_entityref(self, name):
table = self.entitydefs
if table.has_key(name):
self.handle_data(table[name])
else:
self.unknown_entityref(name)
return
# Example -- handle data, should be overridden
def handle_data(self, data):
pass
......@@ -751,14 +772,15 @@ class XMLParser:
def unknown_starttag(self, tag, attrs): pass
def unknown_endtag(self, tag): pass
def unknown_charref(self, ref): pass
def unknown_entityref(self, ref): pass
def unknown_entityref(self, name):
self.syntax_error("reference to unknown entity `&%s;'" % name)
class TestXMLParser(XMLParser):
def __init__(self):
def __init__(self, **kw):
self.testdata = ""
XMLParser.__init__(self)
apply(XMLParser.__init__, (self,), kw)
def handle_xml(self, encoding, standalone):
self.flush()
......@@ -768,10 +790,6 @@ class TestXMLParser(XMLParser):
self.flush()
print 'DOCTYPE:',tag, `data`
def handle_entity(self, name, strval, pubid, syslit, ndata):
self.flush()
print 'ENTITY:',`data`
def handle_data(self, data):
self.testdata = self.testdata + data
if len(`self.testdata`) >= 70:
......
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