diff options
Diffstat (limited to 'Lib/xml')
| -rw-r--r-- | Lib/xml/sax/expatreader.py | 34 | ||||
| -rw-r--r-- | Lib/xml/sax/handler.py | 35 | ||||
| -rw-r--r-- | Lib/xml/sax/xmlreader.py | 6 |
3 files changed, 54 insertions, 21 deletions
diff --git a/Lib/xml/sax/expatreader.py b/Lib/xml/sax/expatreader.py index 341efd3..e3b3ad0 100644 --- a/Lib/xml/sax/expatreader.py +++ b/Lib/xml/sax/expatreader.py @@ -3,17 +3,6 @@ SAX driver for the Pyexpat C module. This driver works with pyexpat.__version__ == '1.5'. """ -# Todo on driver: -# - make it support external entities (wait for pyexpat.c) -# - enable configuration between reset() and feed() calls -# - support lexical events? -# - proper inputsource handling -# - properties and features - -# Todo on pyexpat.c: -# - support XML_ExternalEntityParserCreate -# - exceptions in callouts from pyexpat to python code lose position info - version = "0.20" from xml.sax._exceptions import * @@ -30,10 +19,11 @@ class ExpatParser(xmlreader.IncrementalParser, xmlreader.Locator): def __init__(self, namespaceHandling=0, bufsize=2**16-20): xmlreader.IncrementalParser.__init__(self, bufsize) - self._source = None + self._source = xmlreader.InputSource() self._parser = None self._namespaces = namespaceHandling self._parsing = 0 + self._entity_stack = [] # XMLReader methods @@ -186,11 +176,23 @@ class ExpatParser(xmlreader.IncrementalParser, xmlreader.Locator): self._dtd_handler.notationDecl(name, pubid, sysid) def external_entity_ref(self, context, base, sysid, pubid): - raise NotImplementedError() source = self._ent_handler.resolveEntity(pubid, sysid) - source = saxutils.prepare_input_source(source) - # FIXME: create new parser, stack self._source and self._parser - # FIXME: reuse code from self.parse(...) + source = saxutils.prepare_input_source(source, + self._source.getSystemId() or + "") + + self._entity_stack.append((self._parser, self._source)) + self._parser = self._parser.ExternalEntityParserCreate(context) + self._source = source + + try: + xmlreader.IncrementalParser.parse(self, source) + self.close() + except: + return 0 # FIXME: save error info here? + + (self._parser, self._source) = self._entity_stack[-1] + del self._entity_stack[-1] return 1 # --- diff --git a/Lib/xml/sax/handler.py b/Lib/xml/sax/handler.py index d25c171..c80457c 100644 --- a/Lib/xml/sax/handler.py +++ b/Lib/xml/sax/handler.py @@ -17,7 +17,7 @@ version = '2.0beta' # #============================================================================ -# ===== ErrorHandler ===== +# ===== ERRORHANDLER ===== class ErrorHandler: """Basic interface for SAX error handlers. If you create an object @@ -40,6 +40,7 @@ class ErrorHandler: "Handle a warning." print exception + # ===== CONTENTHANDLER ===== class ContentHandler: @@ -199,7 +200,39 @@ class ContentHandler: http://xml.org/sax/features/external-general-entities and the http://xml.org/sax/features/external-parameter-entities properties.""" + + +# ===== DTDHandler ===== + +class DTDHandler: + """Handle DTD events. + + This interface specifies only those DTD events required for basic + parsing (unparsed entities and attributes).""" + + def notationDecl(self, name, publicId, systemId): + "Handle a notation declaration event." + + def unparsedEntityDecl(self, name, publicId, systemId, ndata): + "Handle an unparsed entity declaration event." + + +# ===== ENTITYRESOLVER ===== +class EntityResolver: + """Basic interface for resolving entities. If you create an object + implementing this interface, then register the object with your + Parser, the parser will call the method in your object to + resolve all external entities. Note that DefaultHandler implements + this interface with the default behaviour.""" + + def resolveEntity(self, publicId, systemId): + """Resolve the system identifier of an entity and return either + the system identifier to read from as a string, or an InputSource + to read from.""" + return systemId + + #============================================================================ # # CORE FEATURES diff --git a/Lib/xml/sax/xmlreader.py b/Lib/xml/sax/xmlreader.py index e5133f6..04e7bc1 100644 --- a/Lib/xml/sax/xmlreader.py +++ b/Lib/xml/sax/xmlreader.py @@ -9,8 +9,8 @@ class XMLReader: def __init__(self): self._cont_handler = handler.ContentHandler() - #self._dtd_handler = handler.DTDHandler() - #self._ent_handler = handler.EntityResolver() + self._dtd_handler = handler.DTDHandler() + self._ent_handler = handler.EntityResolver() self._err_handler = handler.ErrorHandler() def parse(self, source): @@ -109,8 +109,6 @@ class IncrementalParser(XMLReader): while buffer != "": self.feed(buffer) buffer = file.read(self._bufsize) - - self.reset() def feed(self, data): """This method gives the raw XML data in the data parameter to |