def test_unknown_extension_object(self):
obj = ua.ExtensionObject()
obj.Body = b'example of data in custom format'
obj.TypeId = ua.NodeId.from_string('ns=3;i=42')
data = ua.utils.Buffer(extensionobject_to_binary(obj))
obj2 = ua.extensionobject_from_binary(data)
self.assertEqual(type(obj2), ua.ExtensionObject)
self.assertEqual(obj2.TypeId, obj.TypeId)
self.assertEqual(obj2.Body, b'example of data in custom format')
def test_extension_object(self):
obj = ua.UserNameIdentityToken()
obj.UserName = "******"
obj.Password = b"pass"
obj2 = ua.extensionobject_from_binary(ua.utils.Buffer(extensionobject_to_binary(obj)))
self.assertEqual(type(obj), type(obj2))
self.assertEqual(obj.UserName, obj2.UserName)
self.assertEqual(obj.Password, obj2.Password)
v1 = ua.Variant(obj)
v2 = ua.Variant.from_binary(ua.utils.Buffer(v1.to_binary()))
self.assertEqual(type(v1), type(v2))
self.assertEqual(v1.VariantType, v2.VariantType)
def unpack_uatype(vtype, data):
if hasattr(Primitives, vtype.name):
st = getattr(Primitives, vtype.name)
return st.unpack(data)
elif vtype.value > 25:
return Primitives.Bytes.unpack(data)
elif vtype.name == "ExtensionObject":
# dependency loop: classes in uaprotocol_auto use Variant defined in this file,
# but Variant can contain any object from uaprotocol_auto as ExtensionObject.
# Using local import to avoid import loop
from opcua.ua import extensionobject_from_binary
return extensionobject_from_binary(data)
else:
from opcua.ua import uatypes
if hasattr(uatypes, vtype.name):
klass = getattr(uatypes, vtype.name)
return klass.from_binary(data)
else:
raise UaError("can not unpack unknown vtype {0!s}".format(vtype))
def unpack_uatype(vtype, data):
if hasattr(Primitives, vtype.name):
st = getattr(Primitives, vtype.name)
return st.unpack(data)
elif vtype.value > 25:
return Primitives.Bytes.unpack(data)
elif vtype.name == "ExtensionObject":
# dependency loop: classes in uaprotocol_auto use Variant defined in this file,
# but Variant can contain any object from uaprotocol_auto as ExtensionObject.
# Using local import to avoid import loop
from opcua.ua import extensionobject_from_binary
return extensionobject_from_binary(data)
else:
from opcua.ua import uatypes
if hasattr(uatypes, vtype.name):
klass = getattr(uatypes, vtype.name)
return klass.from_binary(data)
else:
raise UaError("can not unpack unknown vtype {0!s}".format(vtype))
