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make sure SAX endDocument is always called as this could result in a

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* parser.c: make sure SAX endDocument is always called as
  this could result in a Python memory leak otherwise (it's
  used to decrement ref-counting)
* python/generator.py python/libxml.c python/libxml.py
  python/libxml2-python-api.xml python/libxml2class.txt
  python/tests/error.py python/tests/xpath.py: implemented
  the suggestions made by Gary Benson and extended the tests
  to match it.
Daniel
This commit is contained in:
Daniel Veillard 2002-03-05 15:41:29 +00:00
parent ba5e18a3fb
commit 8d24cc1898
9 changed files with 321 additions and 23 deletions
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11
ChangeLog
View File

@ -1,3 +1,14 @@
Tue Mar 5 16:33:42 CET 2002 Daniel Veillard <daniel@veillard.com>
* parser.c: make sure SAX endDocument is always called as
this could result in a Python memory leak otherwise (it's
used to decrement ref-counting)
* python/generator.py python/libxml.c python/libxml.py
python/libxml2-python-api.xml python/libxml2class.txt
python/tests/error.py python/tests/xpath.py: implemented
the suggestions made by Gary Benson and extended the tests
to match it.
Tue Mar 5 10:35:24 CET 2002 Daniel Veillard <daniel@veillard.com>
* python/generator.py: applied patch fixing #73450

18
parser.c
View File

@ -7640,8 +7640,7 @@ xmlParseDocument(xmlParserCtxtPtr ctxt) {
/*
* SAX: end of the document processing.
*/
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL) &&
(!ctxt->disableSAX))
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
if (! ctxt->wellFormed) {
@ -7757,8 +7756,7 @@ xmlParseExtParsedEnt(xmlParserCtxtPtr ctxt) {
/*
* SAX: end of the document processing.
*/
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL) &&
(!ctxt->disableSAX))
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
if (! ctxt->wellFormed) return(-1);
@ -8245,8 +8243,7 @@ xmlParseTryOrFinish(xmlParserCtxtPtr ctxt, int terminate) {
xmlGenericError(xmlGenericErrorContext,
"PP: entering EOF\n");
#endif
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL) &&
(!ctxt->disableSAX))
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
goto done;
}
@ -8269,8 +8266,7 @@ xmlParseTryOrFinish(xmlParserCtxtPtr ctxt, int terminate) {
xmlGenericError(xmlGenericErrorContext,
"PP: entering EOF\n");
#endif
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL) &&
(!ctxt->disableSAX))
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
goto done;
}
@ -8289,8 +8285,7 @@ xmlParseTryOrFinish(xmlParserCtxtPtr ctxt, int terminate) {
xmlGenericError(xmlGenericErrorContext,
"PP: entering EOF\n");
#endif
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL) &&
(!ctxt->disableSAX))
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
goto done;
}
@ -8767,8 +8762,7 @@ xmlParseChunk(xmlParserCtxtPtr ctxt, const char *chunk, int size,
ctxt->disableSAX = 1;
}
if (ctxt->instate != XML_PARSER_EOF) {
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL) &&
(!ctxt->disableSAX))
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
}
ctxt->instate = XML_PARSER_EOF;

71
python/generator.py
View File

@ -583,6 +583,9 @@ def nameFixup(name, classe, type, file):
elif name[0:11] == "xmlXPathGet" and file == "python_accessor":
func = name[11:]
func = string.lower(func[0:1]) + func[1:]
elif name[0:11] == "xmlXPathSet" and file == "python_accessor":
func = name[8:]
func = string.lower(func[0:1]) + func[1:]
elif name[0:11] == "xmlACatalog":
func = name[11:]
func = string.lower(func[0:1]) + func[1:]
@ -612,6 +615,8 @@ def nameFixup(name, classe, type, file):
func = "URI" + func[3:]
elif func[0:4] == "uTF8":
func = "UTF8" + func[4:]
elif func[0:3] == 'sAX':
func = "SAX" + func[3:]
return func
@ -712,7 +717,8 @@ def buildWrappers():
func = nameFixup(name, classe, type, file)
info = (0, func, name, ret, args, file)
function_classes[classe].append(info)
elif name[0:3] == "xml" and len(args) >= 2 and args[1][1] == type:
elif name[0:3] == "xml" and len(args) >= 2 and args[1][1] == type \
and file != "python_accessor":
found = 1
func = nameFixup(name, classe, type, file)
info = (1, func, name, ret, args, file)
@ -722,7 +728,8 @@ def buildWrappers():
func = nameFixup(name, classe, type, file)
info = (0, func, name, ret, args, file)
function_classes[classe].append(info)
elif name[0:4] == "html" and len(args) >= 2 and args[1][1] == type:
elif name[0:4] == "html" and len(args) >= 2 and args[1][1] == type \
and file != "python_accessor":
found = 1
func = nameFixup(name, classe, type, file)
info = (1, func, name, ret, args, file)
@ -789,7 +796,25 @@ def buildWrappers():
classes.write(")\n");
if ret[0] != "void":
if classes_type.has_key(ret[0]):
classes.write(" if ret == None: return None\n");
#
# Raise an exception
#
if string.find(name, "URI") >= 0:
classes.write(
" if ret == None:raise uriError('%s() failed')\n"
% (name))
elif string.find(name, "XPath") >= 0:
classes.write(
" if ret == None:raise xpathError('%s() failed')\n"
% (name))
elif string.find(name, "Parse") >= 0:
classes.write(
" if ret == None:raise parserError('%s() failed')\n"
% (name))
else:
classes.write(
" if ret == None:raise treeError('%s() failed')\n"
% (name))
classes.write(" return ");
classes.write(classes_type[ret[0]][1] % ("ret"));
classes.write("\n");
@ -884,12 +909,48 @@ def buildWrappers():
classes.write(")\n");
if ret[0] != "void":
if classes_type.has_key(ret[0]):
classes.write(" if ret == None: return None\n");
#
# Raise an exception
#
if string.find(name, "URI") >= 0:
classes.write(
" if ret == None:raise uriError('%s() failed')\n"
% (name))
elif string.find(name, "XPath") >= 0:
classes.write(
" if ret == None:raise xpathError('%s() failed')\n"
% (name))
elif string.find(name, "Parse") >= 0:
classes.write(
" if ret == None:raise parserError('%s() failed')\n"
% (name))
else:
classes.write(
" if ret == None:raise treeError('%s() failed')\n"
% (name))
classes.write(" return ");
classes.write(classes_type[ret[0]][1] % ("ret"));
classes.write("\n");
elif converter_type.has_key(ret[0]):
classes.write(" if ret == None: return None\n");
#
# Raise an exception
#
if string.find(name, "URI") >= 0:
classes.write(
" if ret == None:raise uriError('%s() failed')\n"
% (name))
elif string.find(name, "XPath") >= 0:
classes.write(
" if ret == None:raise xpathError('%s() failed')\n"
% (name))
elif string.find(name, "Parse") >= 0:
classes.write(
" if ret == None:raise parserError('%s() failed')\n"
% (name))
else:
classes.write(
" if ret == None:raise treeError('%s() failed')\n"
% (name))
classes.write(" return ");
classes.write(converter_type[ret[0]] % ("ret"));
classes.write("\n");

60
python/libxml.c
View File

@ -324,7 +324,7 @@ pythonProcessingInstruction(void *user_data,
if (PyObject_HasAttrString(handler, "processingInstruction")) {
result =
PyObject_CallMethod(handler,
"ignorableWhitespace", "ss", target, data);
"processingInstruction", "ss", target, data);
Py_XDECREF(result);
}
}
@ -663,7 +663,7 @@ libxml_xmlCreatePushParser(PyObject *self, PyObject *args) {
&chunk, &size, &URI))
return(NULL);
#ifdef DEBUG_ERROR
#ifdef DEBUG
printf("libxml_xmlCreatePushParser(%p, %s, %d, %s) called\n",
pyobj_SAX, chunk, size, URI);
#endif
@ -691,7 +691,7 @@ libxml_htmlCreatePushParser(PyObject *self, PyObject *args) {
&chunk, &size, &URI))
return(NULL);
#ifdef DEBUG_ERROR
#ifdef DEBUG
printf("libxml_htmlCreatePushParser(%p, %s, %d, %s) called\n",
pyobj_SAX, chunk, size, URI);
#endif
@ -706,6 +706,60 @@ libxml_htmlCreatePushParser(PyObject *self, PyObject *args) {
return(pyret);
}
PyObject *
libxml_xmlSAXParseFile(PyObject *self, PyObject *args) {
int recover;
xmlChar *URI;
PyObject *pyobj_SAX = NULL;
xmlSAXHandlerPtr SAX = NULL;
if (!PyArg_ParseTuple(args, "Osi:xmlSAXParseFile", &pyobj_SAX,
&URI, &recover))
return(NULL);
#ifdef DEBUG
printf("libxml_xmlSAXParseFile(%p, %s, %d) called\n",
pyobj_SAX, URI, recover);
#endif
if (pyobj_SAX == Py_None) {
Py_INCREF(Py_None);
return(Py_None);
}
SAX = &pythonSaxHandler;
Py_INCREF(pyobj_SAX);
/* The reference is released in pythonEndDocument() */
xmlSAXParseFileWithData(SAX, URI, recover, pyobj_SAX);
Py_INCREF(Py_None);
return(Py_None);
}
PyObject *
libxml_htmlSAXParseFile(PyObject *self, PyObject *args) {
xmlChar *URI;
xmlChar *encoding;
PyObject *pyobj_SAX = NULL;
xmlSAXHandlerPtr SAX = NULL;
if (!PyArg_ParseTuple(args, "Osz:htmlSAXParseFile", &pyobj_SAX,
&URI, &encoding))
return(NULL);
#ifdef DEBUG
printf("libxml_htmlSAXParseFile(%p, %s, %s) called\n",
pyobj_SAX, URI, encoding);
#endif
if (pyobj_SAX == Py_None) {
Py_INCREF(Py_None);
return(Py_None);
}
SAX = &pythonSaxHandler;
Py_INCREF(pyobj_SAX);
/* The reference is released in pythonEndDocument() */
htmlSAXParseFile(URI, encoding, SAX, pyobj_SAX);
Py_INCREF(Py_None);
return(Py_None);
}
/************************************************************************
* *
* Error message callback *

128
python/libxml.py
View File

@ -1,5 +1,133 @@
import libxml2mod
#
# Errors raised by the wrappers when some tree handling failed.
#
class treeError:
def __init__(self, msg):
self.msg = msg
def __str__(self):
return self.msg
class parserError:
def __init__(self, msg):
self.msg = msg
def __str__(self):
return self.msg
class uriError:
def __init__(self, msg):
self.msg = msg
def __str__(self):
return self.msg
class xpathError:
def __init__(self, msg):
self.msg = msg
def __str__(self):
return self.msg
#
# Example of a class to handle SAX events
#
class SAXCallback:
"""Base class for SAX handlers"""
def startDocument(self):
"""called at the start of the document"""
pass
def endDocument(self):
"""called at the end of the document"""
pass
def startElement(self, tag, attrs):
"""called at the start of every element, tag is the name of
the element, attrs is a dictionary of the element's attributes"""
pass
def endElement(self, tag):
"""called at the start of every element, tag is the name of
the element"""
pass
def characters(self, data):
"""called when character data have been read, data is the string
containing the data, multiple consecutive characters() callback
are possible."""
pass
def cdataBlock(self, data):
"""called when CDATA section have been read, data is the string
containing the data, multiple consecutive cdataBlock() callback
are possible."""
pass
def reference(self, name):
"""called when an entity reference has been found"""
pass
def ignorableWhitespace(self, data):
"""called when potentially ignorable white spaces have been found"""
pass
def processingInstruction(self, target, data):
"""called when a PI has been found, target contains the PI name and
data is the associated data in the PI"""
pass
def comment(self, content):
"""called when a comment has been found, content contains the comment"""
pass
def externalSubset(self, name, externalID, systemID):
"""called when a DOCTYPE declaration has been found, name is the
DTD name and externalID, systemID are the DTD public and system
identifier for that DTd if available"""
pass
def internalSubset(self, name, externalID, systemID):
"""called when a DOCTYPE declaration has been found, name is the
DTD name and externalID, systemID are the DTD public and system
identifier for that DTD if available"""
pass
def entityDecl(self, name, type, externalID, systemID, content):
"""called when an ENTITY declaration has been found, name is the
entity name and externalID, systemID are the entity public and
system identifier for that entity if available, type indicates
the entity type, and content reports it's string content"""
pass
def notationDecl(self, name, externalID, systemID):
"""called when an NOTATION declaration has been found, name is the
notation name and externalID, systemID are the notation public and
system identifier for that notation if available"""
pass
def attributeDecl(self, elem, name, type, defi, defaultValue, nameList):
"""called when an ATTRIBUTE definition has been found"""
pass
def elementDecl(self, name, type, content):
"""called when an ELEMENT definition has been found"""
pass
def entityDecl(self, name, publicId, systemID, notationName):
"""called when an unparsed ENTITY declaration has been found,
name is the entity name and publicId,, systemID are the entity
public and system identifier for that entity if available,
and notationName indicate the associated NOTATION"""
pass
def warning(self, msg):
print msg
def error(self, msg):
raise parserError(msg)
def fatalError(self, msg):
raise parserError(msg)
#
# This class is the ancestor of all the Node classes. It provides
# the basic functionalities shared by all nodes (and handle

28
python/libxml2-python-api.xml
View File

@ -36,6 +36,20 @@
<arg name='size' type='int' info='the size of the initial data'/>
<arg name='URI' type='xmlChar *' info='The URI used for base computations'/>
</function>
<function name='xmlSAXParseFile' file='python'>
<info>Interface to parse an XML file or resource pointed by an URI to build an event flow to the SAX object</info>
<return type='void'/>
<arg name='SAX' type='pythonObject' info='the SAX callback object or None'/>
<arg name='URI' type='xmlChar *' info='The URI of the resource'/>
<arg name='recover' type='int' info='allow recovery in case of error'/>
</function>
<function name='htmlSAXParseFile' file='python'>
<info>Interface to parse an HTML file or resource pointed by an URI to build an event flow to the SAX object</info>
<return type='void'/>
<arg name='SAX' type='pythonObject' info='the SAX callback object or None'/>
<arg name='URI' type='xmlChar *' info='The URI of the resource'/>
<arg name='encoding' type='const char *' info='encoding or None'/>
</function>
<!-- xmlParserCtxtPtr accessors -->
<function name='xmlParserGetDoc' file='python_accessor'>
<info>Get the document tree from a parser context.</info>
@ -102,7 +116,7 @@
<return type='xmlNsPtr' info="The namespace or None"/>
<arg name='node' type='xmlNodePtr' info='the node'/>
</function>
<!-- xmlXPathParserContextPtr accessors -->
<!-- xmlXPathContextPtr accessors -->
<function name='xmlXPathParserGetContext' file='python_accessor'>
<info>Get the xpathContext from an xpathParserContext</info>
<return type='xmlXPathContextPtr' info="The XPath context" field="context"/>
@ -118,6 +132,18 @@
<return type='xmlNodePtr' info="The node context" field="node"/>
<arg name='ctxt' type='xmlXPathContextPtr' info='the XPath context'/>
</function>
<function name='xmlXPathSetContextDoc' file='python_accessor'>
<info>Set the doc of an xpathContext</info>
<return type='void'/>
<arg name='ctxt' type='xmlXPathContextPtr' info='the XPath context'/>
<arg name="doc" type='xmlDocPtr' info="The doc context"/>
</function>
<function name='xmlXPathSetContextNode' file='python_accessor'>
<info>Set the current node of an xpathContext</info>
<return type='void'/>
<arg name='ctxt' type='xmlXPathContextPtr' info='the XPath context'/>
<arg name="node" type='xmlNodePtr' info="The node context"/>
</function>
<function name='xmlXPathGetContextPosition' file='python_accessor'>
<info>Get the current node from an xpathContext</info>
<return type='int' info="The node context" field="proximityPosition"/>

4
python/libxml2class.txt
View File

@ -117,10 +117,12 @@ nodePop()
nodePush()
# functions from module python
SAXParseFile()
createPushParser()
debugMemory()
dumpMemory()
htmlCreatePushParser()
htmlSAXParseFile()
newNode()
registerErrorHandler()
@ -542,6 +544,8 @@ Class xpathContext()
contextSize()
function()
functionURI()
setContextDoc()
setContextNode()
# functions from module python
registerXPathFunction()

16
python/tests/error.py
View File

@ -16,8 +16,17 @@ def callback(ctx, str):
err = err + "%s %s" % (ctx, str)
got_exc = 0
libxml2.registerErrorHandler(callback, "-->")
doc = libxml2.parseFile("missing.xml")
try:
doc = libxml2.parseFile("missing.xml")
except libxml2.parserError:
got_exc = 1
if got_exc == 0:
print "Failed to get a parser exception"
sys.exit(1)
if err != expect:
print "error"
print "received %s" %(err)
@ -26,7 +35,10 @@ if err != expect:
i = 10000
while i > 0:
doc = libxml2.parseFile("missing.xml")
try:
doc = libxml2.parseFile("missing.xml")
except libxml2.parserError:
got_exc = 1
err = ""
i = i - 1

8
python/tests/xpath.py
View File

@ -22,6 +22,14 @@ if len(res) != 2:
if res[0].name != "doc" or res[1].name != "foo":
print "xpath query: wrong node set value"
sys.exit(1)
ctxt.setContextNode(res[0])
res = ctxt.xpathEval("foo")
if len(res) != 1:
print "xpath query: wrong node set size"
sys.exit(1)
if res[0].name != "foo":
print "xpath query: wrong node set value"
sys.exit(1)
doc.freeDoc()
ctxt.xpathFreeContext()
i = 1000