| |
| |
| |
| |
| |
| """Defused xml.sax.expatreader |
| """ |
| from __future__ import print_function, absolute_import |
|
|
| from xml.sax.expatreader import ExpatParser as _ExpatParser |
|
|
| from .common import DTDForbidden, EntitiesForbidden, ExternalReferenceForbidden |
|
|
| __origin__ = "xml.sax.expatreader" |
|
|
|
|
| class DefusedExpatParser(_ExpatParser): |
| """Defused SAX driver for the pyexpat C module.""" |
|
|
| def __init__( |
| self, |
| namespaceHandling=0, |
| bufsize=2 ** 16 - 20, |
| forbid_dtd=False, |
| forbid_entities=True, |
| forbid_external=True, |
| ): |
| _ExpatParser.__init__(self, namespaceHandling, bufsize) |
| self.forbid_dtd = forbid_dtd |
| self.forbid_entities = forbid_entities |
| self.forbid_external = forbid_external |
|
|
| def defused_start_doctype_decl(self, name, sysid, pubid, has_internal_subset): |
| raise DTDForbidden(name, sysid, pubid) |
|
|
| def defused_entity_decl( |
| self, name, is_parameter_entity, value, base, sysid, pubid, notation_name |
| ): |
| raise EntitiesForbidden(name, value, base, sysid, pubid, notation_name) |
|
|
| def defused_unparsed_entity_decl(self, name, base, sysid, pubid, notation_name): |
| |
| raise EntitiesForbidden(name, None, base, sysid, pubid, notation_name) |
|
|
| def defused_external_entity_ref_handler(self, context, base, sysid, pubid): |
| raise ExternalReferenceForbidden(context, base, sysid, pubid) |
|
|
| def reset(self): |
| _ExpatParser.reset(self) |
| parser = self._parser |
| if self.forbid_dtd: |
| parser.StartDoctypeDeclHandler = self.defused_start_doctype_decl |
| if self.forbid_entities: |
| parser.EntityDeclHandler = self.defused_entity_decl |
| parser.UnparsedEntityDeclHandler = self.defused_unparsed_entity_decl |
| if self.forbid_external: |
| parser.ExternalEntityRefHandler = self.defused_external_entity_ref_handler |
|
|
|
|
| def create_parser(*args, **kwargs): |
| return DefusedExpatParser(*args, **kwargs) |
|
|
