# Parsers for XML and HTML
from lxml.includes cimport xmlparser
from lxml.includes cimport htmlparser
cdef class _ParserContext(_ResolverContext)
cdef class _SaxParserContext(_ParserContext)
cdef class _TargetParserContext(_SaxParserContext)
cdef class _ParserSchemaValidationContext
cdef class _Validator
cdef class XMLSchema(_Validator)
class ParseError(LxmlSyntaxError):
u"""Syntax error while parsing an XML document.
For compatibility with ElementTree 1.3 and later.
"""
def __init__(self, message, code, line, column):
if python.PY_VERSION_HEX >= 0x02050000:
# Python >= 2.5 uses new style class exceptions
super(_ParseError, self).__init__(message)
else:
_LxmlSyntaxError.__init__(self, message)
self.position = (line, column)
self.code = code
cdef object _LxmlSyntaxError = LxmlSyntaxError
cdef object _ParseError = ParseError
class XMLSyntaxError(ParseError):
u"""Syntax error while parsing an XML document.
"""
pass
class ParserError(LxmlError):
u"""Internal lxml parser error.
"""
pass
@cython.final
@cython.internal
cdef class _ParserDictionaryContext:
# Global parser context to share the string dictionary.
#
# This class is a delegate singleton!
#
# It creates _ParserDictionaryContext objects for each thread to keep thread state,
# but those must never be used directly. Always stick to using the static
# __GLOBAL_PARSER_CONTEXT as defined below the class.
#
cdef tree.xmlDict* _c_dict
cdef _BaseParser _default_parser
cdef list _implied_parser_contexts
def __cinit__(self):
self._c_dict = NULL
self._implied_parser_contexts = []
def __dealloc__(self):
if self._c_dict is not NULL:
xmlparser.xmlDictFree(self._c_dict)
cdef void initMainParserContext(self):
u"""Put the global context into the thread dictionary of the main
thread. To be called once and only in the main thread."""
cdef python.PyObject* thread_dict
cdef python.PyObject* result
thread_dict = python.PyThreadState_GetDict()
if thread_dict is not NULL:
(thread_dict)[u"_ParserDictionaryContext"] = self
cdef _ParserDictionaryContext _findThreadParserContext(self):
u"Find (or create) the _ParserDictionaryContext object for the current thread"
cdef python.PyObject* thread_dict
cdef python.PyObject* result
cdef _ParserDictionaryContext context
thread_dict = python.PyThreadState_GetDict()
if thread_dict is NULL:
return self
d = thread_dict
result = python.PyDict_GetItem(d, u"_ParserDictionaryContext")
if result is not NULL:
return result
context = _ParserDictionaryContext()
d[u"_ParserDictionaryContext"] = context
return context
cdef void setDefaultParser(self, _BaseParser parser):
u"Set the default parser for the current thread"
cdef _ParserDictionaryContext context
context = self._findThreadParserContext()
context._default_parser = parser
cdef _BaseParser getDefaultParser(self):
u"Return (or create) the default parser of the current thread"
cdef _ParserDictionaryContext context
context = self._findThreadParserContext()
if context._default_parser is None:
if self._default_parser is None:
self._default_parser = __DEFAULT_XML_PARSER._copy()
if context is not self:
context._default_parser = self._default_parser._copy()
return context._default_parser
cdef tree.xmlDict* _getThreadDict(self, tree.xmlDict* default):
u"Return the thread-local dict or create a new one if necessary."
cdef _ParserDictionaryContext context
context = self._findThreadParserContext()
if context._c_dict is NULL:
# thread dict not yet set up => use default or create a new one
if default is not NULL:
context._c_dict = default
xmlparser.xmlDictReference(default)
return default
if self._c_dict is NULL:
self._c_dict = xmlparser.xmlDictCreate()
if context is not self:
context._c_dict = xmlparser.xmlDictCreateSub(self._c_dict)
return context._c_dict
cdef void initThreadDictRef(self, tree.xmlDict** c_dict_ref):
cdef tree.xmlDict* c_dict
cdef tree.xmlDict* c_thread_dict
c_dict = c_dict_ref[0]
c_thread_dict = self._getThreadDict(c_dict)
if c_dict is c_thread_dict:
return
if c_dict is not NULL:
xmlparser.xmlDictFree(c_dict)
c_dict_ref[0] = c_thread_dict
xmlparser.xmlDictReference(c_thread_dict)
cdef void initParserDict(self, xmlparser.xmlParserCtxt* pctxt):
u"Assure we always use the same string dictionary."
self.initThreadDictRef(&pctxt.dict)
cdef void initXPathParserDict(self, xpath.xmlXPathContext* pctxt):
u"Assure we always use the same string dictionary."
self.initThreadDictRef(&pctxt.dict)
cdef void initDocDict(self, xmlDoc* result):
u"Store dict of last object parsed if no shared dict yet"
# XXX We also free the result dict here if there already was one.
# This case should only occur for new documents with empty dicts,
# otherwise we'd free data that's in use => segfault
self.initThreadDictRef(&result.dict)
cdef _ParserContext findImpliedContext(self):
u"""Return any current implied xml parser context for the current
thread. This is used when the resolver functions are called
with an xmlParserCtxt that was generated from within libxml2
(i.e. without a _ParserContext) - which happens when parsing
schema and xinclude external references."""
cdef _ParserDictionaryContext context
cdef _ParserContext implied_context
# see if we have a current implied parser
context = self._findThreadParserContext()
if python.PyList_GET_SIZE(context._implied_parser_contexts):
implied_context = context._implied_parser_contexts[-1]
return implied_context
return None
cdef void pushImpliedContextFromParser(self, _BaseParser parser):
u"Push a new implied context object taken from the parser."
if parser is not None:
self.pushImpliedContext(parser._getParserContext())
else:
self.pushImpliedContext(None)
cdef void pushImpliedContext(self, _ParserContext parser_context):
u"Push a new implied context object."
cdef _ParserDictionaryContext context
context = self._findThreadParserContext()
context._implied_parser_contexts.append(parser_context)
cdef void popImpliedContext(self):
u"Pop the current implied context object."
cdef _ParserDictionaryContext context
context = self._findThreadParserContext()
context._implied_parser_contexts.pop()
cdef _ParserDictionaryContext __GLOBAL_PARSER_CONTEXT
__GLOBAL_PARSER_CONTEXT = _ParserDictionaryContext()
__GLOBAL_PARSER_CONTEXT.initMainParserContext()
############################################################
## support for Python unicode I/O
############################################################
# name of Python unicode encoding as known to libxml2
cdef const_char* _UNICODE_ENCODING = NULL
cdef int _setupPythonUnicode() except -1:
u"""Sets _UNICODE_ENCODING to the internal encoding name of Python unicode
strings if libxml2 supports reading native Python unicode. This depends
on iconv and the local Python installation, so we simply check if we find
a matching encoding handler.
"""
cdef tree.xmlCharEncodingHandler* enchandler
cdef Py_ssize_t l
cdef const_char* buffer
cdef const_char* enc
utext = python.PyUnicode_DecodeUTF8(" ", 7, NULL)
l = python.PyUnicode_GET_DATA_SIZE(utext)
buffer = python.PyUnicode_AS_DATA(utext)
enc = _findEncodingName(buffer, l)
if enc == NULL:
# apparently, libxml2 can't detect UTF-16 on some systems
if l >= 4 and \
buffer[0] == c'<' and buffer[1] == c'\0' and \
buffer[2] == c't' and buffer[3] == c'\0':
enc = "UTF-16LE"
elif l >= 4 and \
buffer[0] == c'\0' and buffer[1] == c'<' and \
buffer[2] == c'\0' and buffer[3] == c't':
enc = "UTF-16BE"
else:
# not my fault, it's YOUR broken system :)
return 0
enchandler = tree.xmlFindCharEncodingHandler(enc)
if enchandler is not NULL:
global _UNICODE_ENCODING
tree.xmlCharEncCloseFunc(enchandler)
_UNICODE_ENCODING = enc
return 0
cdef const_char* _findEncodingName(const_char* buffer, int size):
u"Work around bug in libxml2: find iconv name of encoding on our own."
cdef tree.xmlCharEncoding enc
enc = tree.xmlDetectCharEncoding(buffer, size)
if enc == tree.XML_CHAR_ENCODING_UTF16LE:
return "UTF-16LE"
elif enc == tree.XML_CHAR_ENCODING_UTF16BE:
return "UTF-16BE"
elif enc == tree.XML_CHAR_ENCODING_UCS4LE:
return "UCS-4LE"
elif enc == tree.XML_CHAR_ENCODING_UCS4BE:
return "UCS-4BE"
elif enc == tree.XML_CHAR_ENCODING_NONE:
return NULL
else:
# returns a constant char*, no need to free it
return tree.xmlGetCharEncodingName(enc)
_setupPythonUnicode()
############################################################
## support for file-like objects
############################################################
@cython.final
@cython.internal
cdef class _FileReaderContext:
cdef object _filelike
cdef object _encoding
cdef object _url
cdef object _bytes
cdef _ExceptionContext _exc_context
cdef Py_ssize_t _bytes_read
cdef char* _c_url
cdef bint _close_file_after_read
def __cinit__(self, filelike, exc_context, url, encoding=None, bint close_file=False):
self._exc_context = exc_context
self._filelike = filelike
self._close_file_after_read = close_file
self._encoding = encoding
if url is None:
self._c_url = NULL
else:
url = _encodeFilename(url)
self._c_url = _cstr(url)
self._url = url
self._bytes = b''
self._bytes_read = 0
cdef _close_file(self):
if self._filelike is None or not self._close_file_after_read:
return
try:
close = self._filelike.close
except AttributeError:
close = None
finally:
self._filelike = None
if close is not None:
close()
cdef xmlparser.xmlParserInputBuffer* _createParserInputBuffer(self):
cdef stdio.FILE* c_stream
cdef xmlparser.xmlParserInputBuffer* c_buffer
c_buffer = xmlparser.xmlAllocParserInputBuffer(0)
c_stream = python.PyFile_AsFile(self._filelike)
if c_stream is NULL:
c_buffer.readcallback = _readFilelikeParser
c_buffer.context = self
else:
c_buffer.readcallback = _readFileParser
c_buffer.context = c_stream
return c_buffer
cdef xmlparser.xmlParserInput* _createParserInput(
self, xmlparser.xmlParserCtxt* ctxt):
cdef xmlparser.xmlParserInputBuffer* c_buffer
c_buffer = self._createParserInputBuffer()
return xmlparser.xmlNewIOInputStream(ctxt, c_buffer, 0)
cdef tree.xmlDtd* _readDtd(self):
cdef xmlparser.xmlParserInputBuffer* c_buffer
c_buffer = self._createParserInputBuffer()
with nogil:
return xmlparser.xmlIOParseDTD(NULL, c_buffer, 0)
cdef xmlDoc* _readDoc(self, xmlparser.xmlParserCtxt* ctxt, int options):
cdef xmlDoc* result
cdef char* c_encoding
cdef stdio.FILE* c_stream
cdef xmlparser.xmlInputReadCallback c_read_callback
cdef xmlparser.xmlInputCloseCallback c_close_callback
cdef void* c_callback_context
if self._encoding is None:
c_encoding = NULL
else:
c_encoding = _cstr(self._encoding)
c_stream = python.PyFile_AsFile(self._filelike)
if c_stream is NULL:
c_read_callback = _readFilelikeParser
c_callback_context = self
else:
c_read_callback = _readFileParser
c_callback_context = c_stream
with nogil:
if ctxt.html:
result = htmlparser.htmlCtxtReadIO(
ctxt, c_read_callback, NULL, c_callback_context,
self._c_url, c_encoding, options)
if result is not NULL:
if _fixHtmlDictNames(ctxt.dict, result) < 0:
tree.xmlFreeDoc(result)
result = NULL
else:
result = xmlparser.xmlCtxtReadIO(
ctxt, c_read_callback, NULL, c_callback_context,
self._c_url, c_encoding, options)
self._close_file()
return result
cdef int copyToBuffer(self, char* c_buffer, int c_requested):
cdef int c_byte_count
cdef char* c_start
cdef Py_ssize_t byte_count, remaining
if self._bytes_read < 0:
return 0
try:
c_byte_count = 0
byte_count = python.PyBytes_GET_SIZE(self._bytes)
remaining = byte_count - self._bytes_read
while c_requested > remaining:
c_start = _cstr(self._bytes) + self._bytes_read
cstring_h.memcpy(c_buffer, c_start, remaining)
c_byte_count += remaining
c_buffer += remaining
c_requested -= remaining
self._bytes = self._filelike.read(c_requested)
if not isinstance(self._bytes, bytes):
if isinstance(self._bytes, unicode):
if self._encoding is None:
self._bytes = (self._bytes).encode('utf8')
else:
self._bytes = python.PyUnicode_AsEncodedString(
self._bytes, _cstr(self._encoding), NULL)
else:
self._close_file()
raise TypeError, \
u"reading from file-like objects must return byte strings or unicode strings"
remaining = python.PyBytes_GET_SIZE(self._bytes)
if remaining == 0:
self._bytes_read = -1
self._close_file()
return c_byte_count
self._bytes_read = 0
if c_requested > 0:
c_start = _cstr(self._bytes) + self._bytes_read
cstring_h.memcpy(c_buffer, c_start, c_requested)
c_byte_count += c_requested
self._bytes_read += c_requested
return c_byte_count
except:
self._exc_context._store_raised()
self._close_file()
return -1
cdef int _readFilelikeParser(void* ctxt, char* c_buffer, int c_size) with gil:
return (<_FileReaderContext>ctxt).copyToBuffer(c_buffer, c_size)
cdef int _readFileParser(void* ctxt, char* c_buffer, int c_size) nogil:
return stdio.fread(c_buffer, 1, c_size, ctxt)
############################################################
## support for custom document loaders
############################################################
cdef xmlparser.xmlParserInput* _local_resolver(const_char* c_url, const_char* c_pubid,
xmlparser.xmlParserCtxt* c_context) with gil:
cdef _ResolverContext context
cdef xmlparser.xmlParserInput* c_input
cdef _InputDocument doc_ref
cdef _FileReaderContext file_context
# if there is no _ParserContext associated with the xmlParserCtxt
# passed, check to see if the thread state object has an implied
# context.
if c_context._private is not NULL:
context = <_ResolverContext>c_context._private
else:
context = __GLOBAL_PARSER_CONTEXT.findImpliedContext()
if context is None:
if __DEFAULT_ENTITY_LOADER is NULL:
return NULL
return __DEFAULT_ENTITY_LOADER(c_url, c_pubid, c_context)
try:
if c_url is NULL:
url = None
else:
# parsing a related document (DTD etc.) => UTF-8 encoded URL?
url = _decodeFilename(c_url)
if c_pubid is NULL:
pubid = None
else:
pubid = funicode(c_pubid) # always UTF-8
doc_ref = context._resolvers.resolve(url, pubid, context)
except:
context._store_raised()
return NULL
if doc_ref is not None:
if doc_ref._type == PARSER_DATA_STRING:
data = doc_ref._data_bytes
c_input = xmlparser.xmlNewInputStream(c_context)
if c_input is not NULL:
c_input.base = _xcstr(data)
c_input.length = python.PyBytes_GET_SIZE(data)
c_input.cur = c_input.base
c_input.end = c_input.base + c_input.length
elif doc_ref._type == PARSER_DATA_FILENAME:
data = None
c_input = xmlparser.xmlNewInputFromFile(
c_context, _cstr(doc_ref._filename))
elif doc_ref._type == PARSER_DATA_FILE:
file_context = _FileReaderContext(doc_ref._file, context, url,
None, doc_ref._close_file)
c_input = file_context._createParserInput(c_context)
data = file_context
else:
data = None
c_input = NULL
if data is not None:
context._storage.add(data)
if c_input is not NULL:
return c_input
if __DEFAULT_ENTITY_LOADER is NULL:
return NULL
return __DEFAULT_ENTITY_LOADER(c_url, c_pubid, c_context)
cdef xmlparser.xmlExternalEntityLoader __DEFAULT_ENTITY_LOADER
__DEFAULT_ENTITY_LOADER = xmlparser.xmlGetExternalEntityLoader()
xmlparser.xmlSetExternalEntityLoader(_local_resolver)
############################################################
## Parsers
############################################################
@cython.internal
cdef class _ParserContext(_ResolverContext):
cdef _ErrorLog _error_log
cdef _ParserSchemaValidationContext _validator
cdef xmlparser.xmlParserCtxt* _c_ctxt
cdef python.PyThread_type_lock _lock
def __cinit__(self):
self._c_ctxt = NULL
if not config.ENABLE_THREADING:
self._lock = NULL
else:
self._lock = python.PyThread_allocate_lock()
self._error_log = _ErrorLog()
def __dealloc__(self):
if self._validator is not None:
self._validator.disconnect()
if config.ENABLE_THREADING and self._lock is not NULL:
python.PyThread_free_lock(self._lock)
if self._c_ctxt is not NULL:
xmlparser.xmlFreeParserCtxt(self._c_ctxt)
cdef _ParserContext _copy(self):
cdef _ParserContext context
context = self.__class__()
context._validator = self._validator.copy()
_initParserContext(context, self._resolvers._copy(), NULL)
return context
cdef void _initParserContext(self, xmlparser.xmlParserCtxt* c_ctxt):
self._c_ctxt = c_ctxt
c_ctxt._private = self
cdef void _resetParserContext(self):
if self._c_ctxt is not NULL:
if self._c_ctxt.html:
htmlparser.htmlCtxtReset(self._c_ctxt)
self._c_ctxt.disableSAX = 0 # work around bug in libxml2
elif self._c_ctxt.spaceTab is not NULL or \
_LIBXML_VERSION_INT >= 20629: # work around bug in libxml2
xmlparser.xmlClearParserCtxt(self._c_ctxt)
cdef int prepare(self) except -1:
cdef int result
if config.ENABLE_THREADING and self._lock is not NULL:
with nogil:
result = python.PyThread_acquire_lock(
self._lock, python.WAIT_LOCK)
if result == 0:
raise ParserError, u"parser locking failed"
self._error_log.clear()
self._c_ctxt.sax.serror = _receiveParserError
if self._validator is not None:
self._validator.connect(self._c_ctxt, self._error_log)
return 0
cdef int cleanup(self) except -1:
if self._validator is not None:
self._validator.disconnect()
self._resetParserContext()
self.clear()
self._c_ctxt.sax.serror = NULL
if config.ENABLE_THREADING and self._lock is not NULL:
python.PyThread_release_lock(self._lock)
return 0
cdef object _handleParseResult(self, _BaseParser parser,
xmlDoc* result, filename):
cdef xmlDoc* c_doc
cdef bint recover
recover = parser._parse_options & xmlparser.XML_PARSE_RECOVER
c_doc = _handleParseResult(self, self._c_ctxt, result,
filename, recover)
return _documentFactory(c_doc, parser)
cdef xmlDoc* _handleParseResultDoc(self, _BaseParser parser,
xmlDoc* result, filename) except NULL:
cdef bint recover
recover = parser._parse_options & xmlparser.XML_PARSE_RECOVER
return _handleParseResult(self, self._c_ctxt, result,
filename, recover)
cdef _initParserContext(_ParserContext context,
_ResolverRegistry resolvers,
xmlparser.xmlParserCtxt* c_ctxt):
_initResolverContext(context, resolvers)
if c_ctxt is not NULL:
context._initParserContext(c_ctxt)
cdef void _forwardParserError(xmlparser.xmlParserCtxt* _parser_context, xmlerror.xmlError* error) with gil:
(<_ParserContext>_parser_context._private)._error_log._receive(error)
cdef void _receiveParserError(void* c_context, xmlerror.xmlError* error) nogil:
if __DEBUG:
if c_context is NULL or (c_context)._private is NULL:
_forwardError(NULL, error)
else:
_forwardParserError(c_context, error)
cdef int _raiseParseError(xmlparser.xmlParserCtxt* ctxt, filename,
_ErrorLog error_log) except 0:
if filename is not None and \
ctxt.lastError.domain == xmlerror.XML_FROM_IO:
if ctxt.lastError.message is not NULL:
message = u"Error reading file '%s': %s" % (
filename, (ctxt.lastError.message).strip())
else:
message = u"Error reading '%s'" % filename
raise IOError, message
elif error_log:
raise error_log._buildParseException(
XMLSyntaxError, u"Document is not well formed")
elif ctxt.lastError.message is not NULL:
message = (ctxt.lastError.message).strip()
code = ctxt.lastError.code
line = ctxt.lastError.line
column = ctxt.lastError.int2
if ctxt.lastError.line > 0:
message = u"line %d: %s" % (line, message)
raise XMLSyntaxError(message, code, line, column)
else:
raise XMLSyntaxError(None, xmlerror.XML_ERR_INTERNAL_ERROR, 0, 0)
cdef xmlDoc* _handleParseResult(_ParserContext context,
xmlparser.xmlParserCtxt* c_ctxt,
xmlDoc* result, filename,
bint recover) except NULL:
cdef bint well_formed
if result is not NULL:
__GLOBAL_PARSER_CONTEXT.initDocDict(result)
if c_ctxt.myDoc is not NULL:
if c_ctxt.myDoc is not result:
__GLOBAL_PARSER_CONTEXT.initDocDict(c_ctxt.myDoc)
tree.xmlFreeDoc(c_ctxt.myDoc)
c_ctxt.myDoc = NULL
if result is not NULL:
if context._validator is not None and \
not context._validator.isvalid():
well_formed = 0 # actually not 'valid', but anyway ...
elif recover or (c_ctxt.wellFormed and
c_ctxt.lastError.level < xmlerror.XML_ERR_ERROR):
well_formed = 1
elif not c_ctxt.replaceEntities and not c_ctxt.validate \
and context is not None:
# in this mode, we ignore errors about undefined entities
for error in context._error_log.filter_from_errors():
if error.type != ErrorTypes.WAR_UNDECLARED_ENTITY and \
error.type != ErrorTypes.ERR_UNDECLARED_ENTITY:
well_formed = 0
break
else:
well_formed = 1
else:
well_formed = 0
if not well_formed:
# free broken document
tree.xmlFreeDoc(result)
result = NULL
if context is not None and context._has_raised():
if result is not NULL:
tree.xmlFreeDoc(result)
result = NULL
context._raise_if_stored()
if result is NULL:
if context is not None:
_raiseParseError(c_ctxt, filename, context._error_log)
else:
_raiseParseError(c_ctxt, filename, None)
else:
if result.URL is NULL and filename is not None:
result.URL = tree.xmlStrdup(_xcstr(filename))
if result.encoding is NULL:
result.encoding = tree.xmlStrdup("UTF-8")
if context._validator is not None and \
context._validator._add_default_attributes:
# we currently need to do this here as libxml2 does not
# support inserting default attributes during parse-time
# validation
context._validator.inject_default_attributes(result)
return result
cdef int _fixHtmlDictNames(tree.xmlDict* c_dict, xmlDoc* c_doc) nogil:
cdef xmlNode* c_node
if c_doc is NULL:
return 0
c_node = c_doc.children
tree.BEGIN_FOR_EACH_ELEMENT_FROM(c_doc, c_node, 0)
if c_node.type == tree.XML_ELEMENT_NODE:
if _fixHtmlDictNodeNames(c_dict, c_node) < 0:
return -1
tree.END_FOR_EACH_ELEMENT_FROM(c_node)
return 0
cdef inline int _fixHtmlDictNodeNames(tree.xmlDict* c_dict,
xmlNode* c_node) nogil:
cdef xmlNode* c_attr
c_name = tree.xmlDictLookup(c_dict, c_node.name, -1)
if c_name is NULL:
return -1
if c_name is not c_node.name:
tree.xmlFree(c_node.name)
c_node.name = c_name
c_attr = c_node.properties
while c_attr is not NULL:
c_name = tree.xmlDictLookup(c_dict, c_attr.name, -1)
if c_name is NULL:
return -1
if c_name is not c_attr.name:
tree.xmlFree(c_attr.name)
c_attr.name = c_name
c_attr = c_attr.next
return 0
@cython.internal
cdef class _BaseParser:
cdef ElementClassLookup _class_lookup
cdef _ResolverRegistry _resolvers
cdef _ParserContext _parser_context
cdef _ParserContext _push_parser_context
cdef int _parse_options
cdef bint _for_html
cdef bint _remove_comments
cdef bint _remove_pis
cdef bint _strip_cdata
cdef XMLSchema _schema
cdef object _filename
cdef readonly object target
cdef object _default_encoding
def __init__(self, int parse_options, bint for_html, XMLSchema schema,
remove_comments, remove_pis, strip_cdata, target,
filename, encoding):
cdef tree.xmlCharEncodingHandler* enchandler
cdef int c_encoding
if not isinstance(self, (XMLParser, HTMLParser, iterparse)):
raise TypeError, u"This class cannot be instantiated"
self._parse_options = parse_options
self._filename = filename
self.target = target
self._for_html = for_html
self._remove_comments = remove_comments
self._remove_pis = remove_pis
self._strip_cdata = strip_cdata
self._schema = schema
self._resolvers = _ResolverRegistry()
if encoding is None:
self._default_encoding = None
else:
encoding = _utf8(encoding)
enchandler = tree.xmlFindCharEncodingHandler(_cstr(encoding))
if enchandler is NULL:
raise LookupError, u"unknown encoding: '%s'" % encoding
tree.xmlCharEncCloseFunc(enchandler)
self._default_encoding = encoding
cdef _ParserContext _getParserContext(self):
cdef xmlparser.xmlParserCtxt* pctxt
if self._parser_context is None:
self._parser_context = self._createContext(self.target)
if self._schema is not None:
self._parser_context._validator = \
self._schema._newSaxValidator(
self._parse_options & xmlparser.XML_PARSE_DTDATTR)
pctxt = self._newParserCtxt()
if pctxt is NULL:
raise MemoryError()
_initParserContext(self._parser_context, self._resolvers, pctxt)
if self._remove_comments:
pctxt.sax.comment = NULL
if self._remove_pis:
pctxt.sax.processingInstruction = NULL
if self._strip_cdata:
# hard switch-off for CDATA nodes => makes them plain text
pctxt.sax.cdataBlock = NULL
return self._parser_context
cdef _ParserContext _getPushParserContext(self):
cdef xmlparser.xmlParserCtxt* pctxt
if self._push_parser_context is None:
self._push_parser_context = self._createContext(self.target)
if self._schema is not None:
self._push_parser_context._validator = \
self._schema._newSaxValidator(
self._parse_options & xmlparser.XML_PARSE_DTDATTR)
pctxt = self._newPushParserCtxt()
if pctxt is NULL:
raise MemoryError()
_initParserContext(
self._push_parser_context, self._resolvers, pctxt)
if self._remove_comments:
pctxt.sax.comment = NULL
if self._remove_pis:
pctxt.sax.processingInstruction = NULL
if self._strip_cdata:
# hard switch-off for CDATA nodes => makes them plain text
pctxt.sax.cdataBlock = NULL
return self._push_parser_context
cdef _ParserContext _createContext(self, target):
cdef _TargetParserContext context
if target is None:
return _ParserContext()
context = _TargetParserContext()
context._setTarget(target)
return context
cdef int _registerHtmlErrorHandler(self, xmlparser.xmlParserCtxt* c_ctxt) except -1:
cdef xmlparser.xmlSAXHandler* sax = c_ctxt.sax
if sax is not NULL and sax.initialized and sax.initialized != xmlparser.XML_SAX2_MAGIC:
# need to extend SAX1 context to SAX2 to get proper error reports
if sax is &htmlparser.htmlDefaultSAXHandler:
sax = stdlib.malloc(sizeof(xmlparser.xmlSAXHandler))
if sax is NULL:
raise MemoryError()
cstring_h.memcpy(sax, &htmlparser.htmlDefaultSAXHandler,
sizeof(htmlparser.htmlDefaultSAXHandler))
c_ctxt.sax = sax
sax.initialized = xmlparser.XML_SAX2_MAGIC
sax.serror = _receiveParserError
sax.startElementNs = NULL
sax.endElementNs = NULL
sax._private = NULL
return 0
cdef xmlparser.xmlParserCtxt* _newParserCtxt(self):
cdef xmlparser.xmlParserCtxt* c_ctxt
if self._for_html:
c_ctxt = htmlparser.htmlCreateMemoryParserCtxt('dummy', 5)
self._registerHtmlErrorHandler(c_ctxt)
else:
c_ctxt = xmlparser.xmlNewParserCtxt()
return c_ctxt
cdef xmlparser.xmlParserCtxt* _newPushParserCtxt(self):
cdef xmlparser.xmlParserCtxt* c_ctxt
cdef char* c_filename = _cstr(self._filename) if self._filename is not None else NULL
if self._for_html:
c_ctxt = htmlparser.htmlCreatePushParserCtxt(
NULL, NULL, NULL, 0, c_filename, tree.XML_CHAR_ENCODING_NONE)
if c_ctxt is not NULL:
self._registerHtmlErrorHandler(c_ctxt)
htmlparser.htmlCtxtUseOptions(c_ctxt, self._parse_options)
else:
c_ctxt = xmlparser.xmlCreatePushParserCtxt(
NULL, NULL, NULL, 0, c_filename)
if c_ctxt is not NULL:
xmlparser.xmlCtxtUseOptions(c_ctxt, self._parse_options)
return c_ctxt
property error_log:
u"""The error log of the last parser run.
"""
def __get__(self):
cdef _ParserContext context
context = self._getParserContext()
return context._error_log.copy()
property resolvers:
u"The custom resolver registry of this parser."
def __get__(self):
return self._resolvers
property version:
u"The version of the underlying XML parser."
def __get__(self):
return u"libxml2 %d.%d.%d" % LIBXML_VERSION
def setElementClassLookup(self, ElementClassLookup lookup = None):
u":deprecated: use ``parser.set_element_class_lookup(lookup)`` instead."
self.set_element_class_lookup(lookup)
def set_element_class_lookup(self, ElementClassLookup lookup = None):
u"""set_element_class_lookup(self, lookup = None)
Set a lookup scheme for element classes generated from this parser.
Reset it by passing None or nothing.
"""
self._class_lookup = lookup
cdef _BaseParser _copy(self):
u"Create a new parser with the same configuration."
cdef _BaseParser parser
parser = self.__class__()
parser._parse_options = self._parse_options
parser._for_html = self._for_html
parser._remove_comments = self._remove_comments
parser._remove_pis = self._remove_pis
parser._strip_cdata = self._strip_cdata
parser._filename = self._filename
parser._resolvers = self._resolvers
parser.target = self.target
parser._class_lookup = self._class_lookup
parser._default_encoding = self._default_encoding
parser._schema = self._schema
return parser
def copy(self):
u"""copy(self)
Create a new parser with the same configuration.
"""
return self._copy()
def makeelement(self, _tag, attrib=None, nsmap=None, **_extra):
u"""makeelement(self, _tag, attrib=None, nsmap=None, **_extra)
Creates a new element associated with this parser.
"""
return _makeElement(_tag, NULL, None, self, None, None,
attrib, nsmap, _extra)
# internal parser methods
cdef xmlDoc* _parseUnicodeDoc(self, utext, char* c_filename) except NULL:
u"""Parse unicode document, share dictionary if possible.
"""
cdef _ParserContext context
cdef xmlDoc* result
cdef xmlparser.xmlParserCtxt* pctxt
cdef Py_ssize_t py_buffer_len
cdef int buffer_len
cdef const_char* c_text
py_buffer_len = python.PyUnicode_GET_DATA_SIZE(utext)
if py_buffer_len > limits.INT_MAX or _UNICODE_ENCODING is NULL:
text_utf = python.PyUnicode_AsUTF8String(utext)
py_buffer_len = python.PyBytes_GET_SIZE(text_utf)
return self._parseDoc(_cstr(text_utf), py_buffer_len, c_filename)
buffer_len = py_buffer_len
context = self._getParserContext()
context.prepare()
try:
pctxt = context._c_ctxt
__GLOBAL_PARSER_CONTEXT.initParserDict(pctxt)
c_text = python.PyUnicode_AS_DATA(utext)
with nogil:
if self._for_html:
result = htmlparser.htmlCtxtReadMemory(
pctxt, c_text, buffer_len, c_filename, _UNICODE_ENCODING,
self._parse_options)
if result is not NULL:
if _fixHtmlDictNames(pctxt.dict, result) < 0:
tree.xmlFreeDoc(result)
result = NULL
else:
result = xmlparser.xmlCtxtReadMemory(
pctxt, c_text, buffer_len, c_filename, _UNICODE_ENCODING,
self._parse_options)
return context._handleParseResultDoc(self, result, None)
finally:
context.cleanup()
cdef xmlDoc* _parseDoc(self, char* c_text, Py_ssize_t c_len,
char* c_filename) except NULL:
u"""Parse document, share dictionary if possible.
"""
cdef _ParserContext context
cdef xmlDoc* result
cdef xmlparser.xmlParserCtxt* pctxt
cdef char* c_encoding
if c_len > limits.INT_MAX:
raise ParserError, u"string is too long to parse it with libxml2"
context = self._getParserContext()
context.prepare()
try:
pctxt = context._c_ctxt
__GLOBAL_PARSER_CONTEXT.initParserDict(pctxt)
if self._default_encoding is None:
c_encoding = NULL
else:
c_encoding = _cstr(self._default_encoding)
with nogil:
if self._for_html:
result = htmlparser.htmlCtxtReadMemory(
pctxt, c_text, c_len, c_filename,
c_encoding, self._parse_options)
if result is not NULL:
if _fixHtmlDictNames(pctxt.dict, result) < 0:
tree.xmlFreeDoc(result)
result = NULL
else:
result = xmlparser.xmlCtxtReadMemory(
pctxt, c_text, c_len, c_filename,
c_encoding, self._parse_options)
return context._handleParseResultDoc(self, result, None)
finally:
context.cleanup()
cdef xmlDoc* _parseDocFromFile(self, char* c_filename) except NULL:
cdef _ParserContext context
cdef xmlDoc* result
cdef xmlparser.xmlParserCtxt* pctxt
cdef int orig_options
cdef char* c_encoding
result = NULL
context = self._getParserContext()
context.prepare()
try:
pctxt = context._c_ctxt
__GLOBAL_PARSER_CONTEXT.initParserDict(pctxt)
if self._default_encoding is None:
c_encoding = NULL
else:
c_encoding = _cstr(self._default_encoding)
orig_options = pctxt.options
with nogil:
if self._for_html:
result = htmlparser.htmlCtxtReadFile(
pctxt, c_filename, c_encoding, self._parse_options)
if result is not NULL:
if _fixHtmlDictNames(pctxt.dict, result) < 0:
tree.xmlFreeDoc(result)
result = NULL
else:
result = xmlparser.xmlCtxtReadFile(
pctxt, c_filename, c_encoding, self._parse_options)
pctxt.options = orig_options # work around libxml2 problem
return context._handleParseResultDoc(self, result, c_filename)
finally:
context.cleanup()
cdef xmlDoc* _parseDocFromFilelike(self, filelike, filename) except NULL:
cdef _ParserContext context
cdef _FileReaderContext file_context
cdef xmlDoc* result
cdef xmlparser.xmlParserCtxt* pctxt
cdef char* c_filename
if not filename:
filename = None
context = self._getParserContext()
context.prepare()
try:
pctxt = context._c_ctxt
__GLOBAL_PARSER_CONTEXT.initParserDict(pctxt)
file_context = _FileReaderContext(
filelike, context, filename, self._default_encoding)
result = file_context._readDoc(pctxt, self._parse_options)
return context._handleParseResultDoc(
self, result, filename)
finally:
context.cleanup()
############################################################
## ET feed parser
############################################################
cdef class _FeedParser(_BaseParser):
cdef bint _feed_parser_running
property feed_error_log:
u"""The error log of the last (or current) run of the feed parser.
Note that this is local to the feed parser and thus is
different from what the ``error_log`` property returns.
"""
def __get__(self):
cdef _ParserContext context
context = self._getPushParserContext()
return context._error_log.copy()
def feed(self, data):
u"""feed(self, data)
Feeds data to the parser. The argument should be an 8-bit string
buffer containing encoded data, although Unicode is supported as long
as both string types are not mixed.
This is the main entry point to the consumer interface of a
parser. The parser will parse as much of the XML stream as it
can on each call. To finish parsing or to reset the parser,
call the ``close()`` method. Both methods may raise
ParseError if errors occur in the input data. If an error is
raised, there is no longer a need to call ``close()``.
The feed parser interface is independent of the normal parser
usage. You can use the same parser as a feed parser and in
the ``parse()`` function concurrently.
"""
cdef _ParserContext context
cdef xmlparser.xmlParserCtxt* pctxt
cdef Py_ssize_t py_buffer_len
cdef const_char* c_data
cdef const_char* c_encoding
cdef int buffer_len
cdef int error
cdef bint recover = self._parse_options & xmlparser.XML_PARSE_RECOVER
if isinstance(data, bytes):
if self._default_encoding is None:
c_encoding = NULL
else:
c_encoding = self._default_encoding
c_data = _cstr(data)
py_buffer_len = python.PyBytes_GET_SIZE(data)
elif isinstance(data, unicode):
if _UNICODE_ENCODING is NULL:
raise ParserError, \
u"Unicode parsing is not supported on this platform"
c_encoding = _UNICODE_ENCODING
c_data = python.PyUnicode_AS_DATA(data)
py_buffer_len = python.PyUnicode_GET_DATA_SIZE(data)
else:
raise TypeError, u"Parsing requires string data"
context = self._getPushParserContext()
pctxt = context._c_ctxt
error = 0
if not self._feed_parser_running:
context.prepare()
self._feed_parser_running = 1
__GLOBAL_PARSER_CONTEXT.initParserDict(pctxt)
if self._for_html:
error = _htmlCtxtResetPush(
pctxt, NULL, 0, c_encoding, self._parse_options)
else:
xmlparser.xmlCtxtUseOptions(pctxt, self._parse_options)
error = xmlparser.xmlCtxtResetPush(
pctxt, NULL, 0, NULL, c_encoding)
#print pctxt.charset, 'NONE' if c_encoding is NULL else c_encoding
while py_buffer_len > 0 and (error == 0 or recover):
with nogil:
if py_buffer_len > limits.INT_MAX:
buffer_len = limits.INT_MAX
else:
buffer_len = py_buffer_len
if self._for_html:
error = htmlparser.htmlParseChunk(pctxt, c_data, buffer_len, 0)
else:
error = xmlparser.xmlParseChunk(pctxt, c_data, buffer_len, 0)
py_buffer_len -= buffer_len
c_data += buffer_len
if error and not pctxt.replaceEntities and not pctxt.validate:
# in this mode, we ignore errors about undefined entities
for entry in context._error_log.filter_from_errors():
if entry.type != ErrorTypes.WAR_UNDECLARED_ENTITY and \
entry.type != ErrorTypes.ERR_UNDECLARED_ENTITY:
break
else:
error = 0
if not recover and (error or not pctxt.wellFormed):
self._feed_parser_running = 0
try:
context._handleParseResult(self, NULL, None)
finally:
context.cleanup()
def close(self):
u"""close(self)
Terminates feeding data to this parser. This tells the parser to
process any remaining data in the feed buffer, and then returns the
root Element of the tree that was parsed.
This method must be called after passing the last chunk of data into
the ``feed()`` method. It should only be called when using the feed
parser interface, all other usage is undefined.
"""
cdef _ParserContext context
cdef xmlparser.xmlParserCtxt* pctxt
cdef xmlDoc* c_doc
cdef _Document doc
if not self._feed_parser_running:
raise XMLSyntaxError(u"no element found",
xmlerror.XML_ERR_INTERNAL_ERROR, 0, 0)
context = self._getPushParserContext()
pctxt = context._c_ctxt
self._feed_parser_running = 0
if self._for_html:
htmlparser.htmlParseChunk(pctxt, NULL, 0, 1)
else:
xmlparser.xmlParseChunk(pctxt, NULL, 0, 1)
try:
result = context._handleParseResult(self, pctxt.myDoc, None)
finally:
context.cleanup()
if isinstance(result, _Document):
return (<_Document>result).getroot()
else:
return result
cdef int _htmlCtxtResetPush(xmlparser.xmlParserCtxt* c_ctxt,
const_char* c_data, int buffer_len,
const_char* c_encoding, int parse_options) except -1:
cdef xmlparser.xmlParserInput* c_input_stream
# libxml2 crashes if spaceTab is not initialised
if _LIBXML_VERSION_INT < 20629 and c_ctxt.spaceTab is NULL:
c_ctxt.spaceTab = tree.xmlMalloc(10 * sizeof(int))
c_ctxt.spaceMax = 10
# libxml2 lacks an HTML push parser setup function
error = xmlparser.xmlCtxtResetPush(c_ctxt, NULL, 0, NULL, c_encoding)
if error:
return error
# fix libxml2 setup for HTML
c_ctxt.progressive = 1
c_ctxt.html = 1
htmlparser.htmlCtxtUseOptions(c_ctxt, parse_options)
if c_data is not NULL and buffer_len > 0:
return htmlparser.htmlParseChunk(c_ctxt, c_data, buffer_len, 0)
return 0
############################################################
## XML parser
############################################################
cdef int _XML_DEFAULT_PARSE_OPTIONS
_XML_DEFAULT_PARSE_OPTIONS = (
xmlparser.XML_PARSE_NOENT |
xmlparser.XML_PARSE_NOCDATA |
xmlparser.XML_PARSE_NONET |
xmlparser.XML_PARSE_COMPACT
)
cdef class XMLParser(_FeedParser):
u"""XMLParser(self, encoding=None, attribute_defaults=False, dtd_validation=False, load_dtd=False, no_network=True, ns_clean=False, recover=False, XMLSchema schema=None, remove_blank_text=False, resolve_entities=True, remove_comments=False, remove_pis=False, strip_cdata=True, target=None, compact=True)
The XML parser.
Parsers can be supplied as additional argument to various parse
functions of the lxml API. A default parser is always available
and can be replaced by a call to the global function
'set_default_parser'. New parsers can be created at any time
without a major run-time overhead.
The keyword arguments in the constructor are mainly based on the
libxml2 parser configuration. A DTD will also be loaded if DTD
validation or attribute default values are requested (unless you
additionally provide an XMLSchema from which the default
attributes can be read).
Available boolean keyword arguments:
- attribute_defaults - inject default attributes from DTD or XMLSchema
- dtd_validation - validate against a DTD referenced by the document
- load_dtd - use DTD for parsing
- no_network - prevent network access for related files (default: True)
- ns_clean - clean up redundant namespace declarations
- recover - try hard to parse through broken XML
- remove_blank_text - discard blank text nodes
- remove_comments - discard comments
- remove_pis - discard processing instructions
- strip_cdata - replace CDATA sections by normal text content (default: True)
- compact - safe memory for short text content (default: True)
- resolve_entities - replace entities by their text value (default: True)
- huge_tree - disable security restrictions and support very deep trees
and very long text content (only affects libxml2 2.7+)
Other keyword arguments:
- encoding - override the document encoding
- target - a parser target object that will receive the parse events
- schema - an XMLSchema to validate against
Note that you should avoid sharing parsers between threads. While this is
not harmful, it is more efficient to use separate parsers. This does not
apply to the default parser.
"""
def __init__(self, *, encoding=None, attribute_defaults=False,
dtd_validation=False, load_dtd=False, no_network=True,
ns_clean=False, recover=False, XMLSchema schema=None,
huge_tree=False, remove_blank_text=False, resolve_entities=True,
remove_comments=False, remove_pis=False, strip_cdata=True,
target=None, compact=True):
cdef int parse_options
parse_options = _XML_DEFAULT_PARSE_OPTIONS
if load_dtd:
parse_options = parse_options | xmlparser.XML_PARSE_DTDLOAD
if dtd_validation:
parse_options = parse_options | xmlparser.XML_PARSE_DTDVALID | \
xmlparser.XML_PARSE_DTDLOAD
if attribute_defaults:
parse_options = parse_options | xmlparser.XML_PARSE_DTDATTR
if schema is None:
parse_options = parse_options | xmlparser.XML_PARSE_DTDLOAD
if ns_clean:
parse_options = parse_options | xmlparser.XML_PARSE_NSCLEAN
if recover:
parse_options = parse_options | xmlparser.XML_PARSE_RECOVER
if remove_blank_text:
parse_options = parse_options | xmlparser.XML_PARSE_NOBLANKS
if huge_tree:
parse_options = parse_options | xmlparser.XML_PARSE_HUGE
if not no_network:
parse_options = parse_options ^ xmlparser.XML_PARSE_NONET
if not compact:
parse_options = parse_options ^ xmlparser.XML_PARSE_COMPACT
if not resolve_entities:
parse_options = parse_options ^ xmlparser.XML_PARSE_NOENT
if not strip_cdata:
parse_options = parse_options ^ xmlparser.XML_PARSE_NOCDATA
_BaseParser.__init__(self, parse_options, 0, schema,
remove_comments, remove_pis, strip_cdata,
target, None, encoding)
cdef class ETCompatXMLParser(XMLParser):
u"""ETCompatXMLParser(self, encoding=None, attribute_defaults=False, \
dtd_validation=False, load_dtd=False, no_network=True, \
ns_clean=False, recover=False, schema=None, \
huge_tree=False, remove_blank_text=False, resolve_entities=True, \
remove_comments=True, remove_pis=True, strip_cdata=True, \
target=None, compact=True)
An XML parser with an ElementTree compatible default setup.
See the XMLParser class for details.
This parser has ``remove_comments`` and ``remove_pis`` enabled by default
and thus ignores comments and processing instructions.
"""
def __init__(self, *, encoding=None, attribute_defaults=False,
dtd_validation=False, load_dtd=False, no_network=True,
ns_clean=False, recover=False, schema=None,
huge_tree=False, remove_blank_text=False, resolve_entities=True,
remove_comments=True, remove_pis=True, strip_cdata=True,
target=None, compact=True):
XMLParser.__init__(self,
attribute_defaults=attribute_defaults,
dtd_validation=dtd_validation,
load_dtd=load_dtd,
no_network=no_network,
ns_clean=ns_clean,
recover=recover,
remove_blank_text=remove_blank_text,
huge_tree=huge_tree,
compact=compact,
resolve_entities=resolve_entities,
remove_comments=remove_comments,
remove_pis=remove_pis,
strip_cdata=strip_cdata,
target=target,
encoding=encoding,
schema=schema)
# ET 1.2 compatible name
XMLTreeBuilder = ETCompatXMLParser
cdef XMLParser __DEFAULT_XML_PARSER
__DEFAULT_XML_PARSER = XMLParser()
__GLOBAL_PARSER_CONTEXT.setDefaultParser(__DEFAULT_XML_PARSER)
def set_default_parser(_BaseParser parser=None):
u"""set_default_parser(parser=None)
Set a default parser for the current thread. This parser is used
globally whenever no parser is supplied to the various parse functions of
the lxml API. If this function is called without a parser (or if it is
None), the default parser is reset to the original configuration.
Note that the pre-installed default parser is not thread-safe. Avoid the
default parser in multi-threaded environments. You can create a separate
parser for each thread explicitly or use a parser pool.
"""
if parser is None:
parser = __DEFAULT_XML_PARSER
__GLOBAL_PARSER_CONTEXT.setDefaultParser(parser)
def get_default_parser():
u"get_default_parser()"
return __GLOBAL_PARSER_CONTEXT.getDefaultParser()
############################################################
## HTML parser
############################################################
cdef int _HTML_DEFAULT_PARSE_OPTIONS
_HTML_DEFAULT_PARSE_OPTIONS = (
htmlparser.HTML_PARSE_RECOVER |
htmlparser.HTML_PARSE_NONET |
htmlparser.HTML_PARSE_COMPACT
)
cdef class HTMLParser(_FeedParser):
u"""HTMLParser(self, encoding=None, remove_blank_text=False, \
remove_comments=False, remove_pis=False, strip_cdata=True, \
no_network=True, target=None, XMLSchema schema=None, \
recover=True, compact=True)
The HTML parser.
This parser allows reading HTML into a normal XML tree. By
default, it can read broken (non well-formed) HTML, depending on
the capabilities of libxml2. Use the 'recover' option to switch
this off.
Available boolean keyword arguments:
- recover - try hard to parse through broken HTML (default: True)
- no_network - prevent network access for related files (default: True)
- remove_blank_text - discard empty text nodes
- remove_comments - discard comments
- remove_pis - discard processing instructions
- strip_cdata - replace CDATA sections by normal text content (default: True)
- compact - safe memory for short text content (default: True)
Other keyword arguments:
- encoding - override the document encoding
- target - a parser target object that will receive the parse events
- schema - an XMLSchema to validate against
Note that you should avoid sharing parsers between threads for performance
reasons.
"""
def __init__(self, *, encoding=None, remove_blank_text=False,
remove_comments=False, remove_pis=False, strip_cdata=True,
no_network=True, target=None, XMLSchema schema=None,
recover=True, compact=True):
cdef int parse_options
parse_options = _HTML_DEFAULT_PARSE_OPTIONS
if remove_blank_text:
parse_options = parse_options | htmlparser.HTML_PARSE_NOBLANKS
if not recover:
parse_options = parse_options ^ htmlparser.HTML_PARSE_RECOVER
if not no_network:
parse_options = parse_options ^ htmlparser.HTML_PARSE_NONET
if not compact:
parse_options = parse_options ^ htmlparser.HTML_PARSE_COMPACT
_BaseParser.__init__(self, parse_options, 1, schema,
remove_comments, remove_pis, strip_cdata,
target, None, encoding)
cdef HTMLParser __DEFAULT_HTML_PARSER
__DEFAULT_HTML_PARSER = HTMLParser()
############################################################
## helper functions for document creation
############################################################
cdef xmlDoc* _parseDoc(text, filename, _BaseParser parser) except NULL:
cdef char* c_filename
cdef char* c_text
cdef Py_ssize_t c_len
if parser is None:
parser = __GLOBAL_PARSER_CONTEXT.getDefaultParser()
if not filename:
c_filename = NULL
else:
filename_utf = _encodeFilenameUTF8(filename)
c_filename = _cstr(filename_utf)
if isinstance(text, unicode):
c_len = python.PyUnicode_GET_DATA_SIZE(text)
if c_len > limits.INT_MAX:
return (<_BaseParser>parser)._parseDocFromFilelike(
StringIO(text), filename)
return (<_BaseParser>parser)._parseUnicodeDoc(text, c_filename)
else:
c_len = python.PyBytes_GET_SIZE(text)
if c_len > limits.INT_MAX:
return (<_BaseParser>parser)._parseDocFromFilelike(
BytesIO(text), filename)
c_text = _cstr(text)
return (<_BaseParser>parser)._parseDoc(c_text, c_len, c_filename)
cdef xmlDoc* _parseDocFromFile(filename8, _BaseParser parser) except NULL:
if parser is None:
parser = __GLOBAL_PARSER_CONTEXT.getDefaultParser()
return (<_BaseParser>parser)._parseDocFromFile(_cstr(filename8))
cdef xmlDoc* _parseDocFromFilelike(source, filename,
_BaseParser parser) except NULL:
if parser is None:
parser = __GLOBAL_PARSER_CONTEXT.getDefaultParser()
return (<_BaseParser>parser)._parseDocFromFilelike(source, filename)
cdef xmlDoc* _newXMLDoc() except NULL:
cdef xmlDoc* result
result = tree.xmlNewDoc(NULL)
if result is NULL:
raise MemoryError()
if result.encoding is NULL:
result.encoding = tree.xmlStrdup("UTF-8")
__GLOBAL_PARSER_CONTEXT.initDocDict(result)
return result
cdef xmlDoc* _newHTMLDoc() except NULL:
cdef xmlDoc* result
result = tree.htmlNewDoc(NULL, NULL)
if result is NULL:
raise MemoryError()
__GLOBAL_PARSER_CONTEXT.initDocDict(result)
return result
cdef xmlDoc* _copyDoc(xmlDoc* c_doc, int recursive) except NULL:
cdef xmlDoc* result
if recursive:
with nogil:
result = tree.xmlCopyDoc(c_doc, recursive)
else:
result = tree.xmlCopyDoc(c_doc, 0)
if result is NULL:
raise MemoryError()
__GLOBAL_PARSER_CONTEXT.initDocDict(result)
return result
cdef xmlDoc* _copyDocRoot(xmlDoc* c_doc, xmlNode* c_new_root) except NULL:
u"Recursively copy the document and make c_new_root the new root node."
cdef xmlDoc* result
cdef xmlNode* c_node
result = tree.xmlCopyDoc(c_doc, 0) # non recursive
__GLOBAL_PARSER_CONTEXT.initDocDict(result)
with nogil:
c_node = tree.xmlDocCopyNode(c_new_root, result, 1) # recursive
if c_node is NULL:
raise MemoryError()
tree.xmlDocSetRootElement(result, c_node)
_copyTail(c_new_root.next, c_node)
return result
cdef xmlNode* _copyNodeToDoc(xmlNode* c_node, xmlDoc* c_doc) except NULL:
u"Recursively copy the element into the document. c_doc is not modified."
cdef xmlNode* c_root
c_root = tree.xmlDocCopyNode(c_node, c_doc, 1) # recursive
if c_root is NULL:
raise MemoryError()
_copyTail(c_node.next, c_root)
return c_root
############################################################
## API level helper functions for _Document creation
## (here we convert to UTF-8)
############################################################
cdef _Document _parseDocument(source, _BaseParser parser, base_url):
cdef _Document doc
if _isString(source):
# parse the file directly from the filesystem
doc = _parseDocumentFromURL(_encodeFilename(source), parser)
# fix base URL if requested
if base_url is not None:
base_url = _encodeFilenameUTF8(base_url)
if doc._c_doc.URL is not NULL:
tree.xmlFree(doc._c_doc.URL)
doc._c_doc.URL = tree.xmlStrdup(_xcstr(base_url))
return doc
if base_url is not None:
url = base_url
else:
url = _getFilenameForFile(source)
if hasattr(source, u'getvalue') and hasattr(source, u'tell'):
# StringIO - reading from start?
if source.tell() == 0:
return _parseMemoryDocument(
source.getvalue(), _encodeFilenameUTF8(url), parser)
# Support for file-like objects (urlgrabber.urlopen, ...)
if hasattr(source, u'read'):
return _parseFilelikeDocument(
source, _encodeFilenameUTF8(url), parser)
raise TypeError, u"cannot parse from '%s'" % python._fqtypename(source).decode('UTF-8')
cdef _Document _parseDocumentFromURL(url, _BaseParser parser):
cdef xmlDoc* c_doc
c_doc = _parseDocFromFile(url, parser)
return _documentFactory(c_doc, parser)
cdef _Document _parseMemoryDocument(text, url, _BaseParser parser):
cdef xmlDoc* c_doc
if isinstance(text, unicode):
if _hasEncodingDeclaration(text):
raise ValueError(
u"Unicode strings with encoding declaration are not supported. "
u"Please use bytes input or XML fragments without declaration.")
# pass native unicode only if libxml2 can handle it
if _UNICODE_ENCODING is NULL:
text = (text).encode('utf8')
elif not isinstance(text, bytes):
raise ValueError, u"can only parse strings"
if isinstance(url, unicode):
url = (url).encode('utf8')
c_doc = _parseDoc(text, url, parser)
return _documentFactory(c_doc, parser)
cdef _Document _parseFilelikeDocument(source, url, _BaseParser parser):
cdef xmlDoc* c_doc
if isinstance(url, unicode):
url = (url).encode('utf8')
c_doc = _parseDocFromFilelike(source, url, parser)
return _documentFactory(c_doc, parser)