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Issue #16986: ElementTree now correctly parses a string input not only when 

an internal XML encoding is UTF-8 or US-ASCII.
This commit is contained in:
Serhiy Storchaka 2013-05-22 17:07:51 +03:00
parent 9e62d35e65
commit 66d53fa9ad
5 changed files with 65 additions and 24 deletions
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1
Include/pyexpat.h
View File

@ -45,6 +45,7 @@ struct PyExpat_CAPI
void (*SetUserData)(XML_Parser parser, void *userData);
void (*SetStartDoctypeDeclHandler)(XML_Parser parser,
XML_StartDoctypeDeclHandler start);
enum XML_Status (*SetEncoding)(XML_Parser parser, const XML_Char *encoding);
/* always add new stuff to the end! */
};

45
Lib/test/test_xml_etree.py
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@ -677,15 +677,18 @@ class ElementTreeTest(unittest.TestCase):
elem = ET.fromstring("<html><body>text</body></html>")
self.assertEqual(ET.tostring(elem), b'<html><body>text</body></html>')
def test_encoding(encoding):
def check(encoding):
ET.XML("<?xml version='1.0' encoding='%s'?><xml />" % encoding)
check("ascii")
check("us-ascii")
check("iso-8859-1")
check("iso-8859-15")
check("cp437")
check("mac-roman")
def test_encoding(self):
def check(encoding, body=''):
xml = ("<?xml version='1.0' encoding='%s'?><xml>%s</xml>" %
(encoding, body))
self.assertEqual(ET.XML(xml.encode(encoding)).text, body)
self.assertEqual(ET.XML(xml).text, body)
check("ascii", 'a')
check("us-ascii", 'a')
check("iso-8859-1", '\xbd')
check("iso-8859-15", '\u20ac')
check("cp437", '\u221a')
check("mac-roman", '\u02da')
def test_methods(self):
# Test serialization methods.
@ -1842,11 +1845,13 @@ class TreeBuilderTest(unittest.TestCase):
class XMLParserTest(unittest.TestCase):
sample1 = '<file><line>22</line></file>'
sample2 = ('<!DOCTYPE html PUBLIC'
' "-//W3C//DTD XHTML 1.0 Transitional//EN"'
' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">'
'<html>text</html>')
sample1 = b'<file><line>22</line></file>'
sample2 = (b'<!DOCTYPE html PUBLIC'
b' "-//W3C//DTD XHTML 1.0 Transitional//EN"'
b' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">'
b'<html>text</html>')
sample3 = ('<?xml version="1.0" encoding="iso-8859-1"?>\n'
'<money value="$\xa3\u20ac\U0001017b">$\xa3\u20ac\U0001017b</money>')
def _check_sample_element(self, e):
self.assertEqual(e.tag, 'file')
@ -1882,12 +1887,21 @@ class XMLParserTest(unittest.TestCase):
_doctype = (name, pubid, system)
parser = MyParserWithDoctype()
parser.feed(self.sample2)
with self.assertWarns(DeprecationWarning):
parser.feed(self.sample2)
parser.close()
self.assertEqual(_doctype,
('html', '-//W3C//DTD XHTML 1.0 Transitional//EN',
'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'))
def test_parse_string(self):
parser = ET.XMLParser(target=ET.TreeBuilder())
parser.feed(self.sample3)
e = parser.close()
self.assertEqual(e.tag, 'money')
self.assertEqual(e.attrib['value'], '$\xa3\u20ac\U0001017b')
self.assertEqual(e.text, '$\xa3\u20ac\U0001017b')
class NamespaceParseTest(unittest.TestCase):
def test_find_with_namespace(self):
@ -2297,6 +2311,7 @@ def test_main(module=None):
ElementFindTest,
ElementIterTest,
TreeBuilderTest,
XMLParserTest,
BugsTest,
]

3
Misc/NEWS
View File

@ -24,6 +24,9 @@ Core and Builtins
Library
-------
- Issue #16986: ElementTree now correctly parses a string input not only when
an internal XML encoding is UTF-8 or US-ASCII.
- Issue #17812: Fixed quadratic complexity of base64.b32encode().
- Issue #17980: Fix possible abuse of ssl.match_hostname() for denial of

39
Modules/_elementtree.c
View File

@ -3330,7 +3330,7 @@ xmlparser_dealloc(XMLParserObject* self)
}
LOCAL(PyObject*)
expat_parse(XMLParserObject* self, char* data, int data_len, int final)
expat_parse(XMLParserObject* self, const char* data, int data_len, int final)
{
int ok;
@ -3376,16 +3376,37 @@ xmlparser_close(XMLParserObject* self, PyObject* args)
}
static PyObject*
xmlparser_feed(XMLParserObject* self, PyObject* args)
xmlparser_feed(XMLParserObject* self, PyObject* arg)
{
/* feed data to parser */
char* data;
int data_len;
if (!PyArg_ParseTuple(args, "s#:feed", &data, &data_len))
return NULL;
return expat_parse(self, data, data_len, 0);
if (PyUnicode_Check(arg)) {
Py_ssize_t data_len;
const char *data = PyUnicode_AsUTF8AndSize(arg, &data_len);
if (data == NULL)
return NULL;
if (data_len > INT_MAX) {
PyErr_SetString(PyExc_OverflowError, "size does not fit in an int");
return NULL;
}
/* Explicitly set UTF-8 encoding. Return code ignored. */
(void)EXPAT(SetEncoding)(self->parser, "utf-8");
return expat_parse(self, data, (int)data_len, 0);
}
else {
Py_buffer view;
PyObject *res;
if (PyObject_GetBuffer(arg, &view, PyBUF_SIMPLE) < 0)
return NULL;
if (view.len > INT_MAX) {
PyBuffer_Release(&view);
PyErr_SetString(PyExc_OverflowError, "size does not fit in an int");
return NULL;
}
res = expat_parse(self, view.buf, (int)view.len, 0);
PyBuffer_Release(&view);
return res;
}
}
static PyObject*
@ -3570,7 +3591,7 @@ xmlparser_setevents(XMLParserObject *self, PyObject* args)
}
static PyMethodDef xmlparser_methods[] = {
{"feed", (PyCFunction) xmlparser_feed, METH_VARARGS},
{"feed", (PyCFunction) xmlparser_feed, METH_O},
{"close", (PyCFunction) xmlparser_close, METH_VARARGS},
{"_parse", (PyCFunction) xmlparser_parse, METH_VARARGS},
{"_setevents", (PyCFunction) xmlparser_setevents, METH_VARARGS},

1
Modules/pyexpat.c
View File

@ -1937,6 +1937,7 @@ MODULE_INITFUNC(void)
capi.SetUnknownEncodingHandler = XML_SetUnknownEncodingHandler;
capi.SetUserData = XML_SetUserData;
capi.SetStartDoctypeDeclHandler = XML_SetStartDoctypeDeclHandler;
capi.SetEncoding = XML_SetEncoding;
/* export using capsule */
capi_object = PyCapsule_New(&capi, PyExpat_CAPSULE_NAME, NULL);