def _sendExceptionResponse(self, connection, seq, serializer_id, exc_value,
tbinfo):
"""send an exception back including the local traceback info"""
exc_value._pyroTraceback = tbinfo
if sys.platform == "cli":
util.fixIronPythonExceptionForPickle(exc_value,
True) # piggyback attributes
serializer = util.get_serializer_by_id(serializer_id)
try:
data, compressed = serializer.serializeData(exc_value)
except:
# the exception object couldn't be serialized, use a generic PyroError instead
xt, xv, tb = sys.exc_info()
msg = "Error serializing exception: %s. Original exception: %s: %s" % (
str(xv), type(exc_value), str(exc_value))
exc_value = errors.PyroError(msg)
exc_value._pyroTraceback = tbinfo
if sys.platform == "cli":
util.fixIronPythonExceptionForPickle(
exc_value, True) # piggyback attributes
data, compressed = serializer.serializeData(exc_value)
flags = Pyro4.message.FLAGS_EXCEPTION
if compressed:
flags |= Pyro4.message.FLAGS_COMPRESSED
if Pyro4.config.LOGWIRE:
log.debug(
"daemon wiredata sending (error response): msgtype=%d flags=0x%x ser=%d seq=%d data=%r"
% (Pyro4.message.MSG_RESULT, flags, serializer.serializer_id,
seq, data))
msg = Message(Pyro4.message.MSG_RESULT, data, serializer.serializer_id,
flags, seq)
connection.send(msg.to_bytes())
def _pyro_run_call(obj, method, vargs, kwargs):
log = logger.debug
try:
method = util.getAttribute(obj, method)
return method(*vargs, **kwargs) # this is the actual method call to the Pyro object
except Exception:
xt, xv = sys.exc_info()[0:2]
log("Exception occurred while handling request: %s", xv)
xv._pyroTraceback = util.formatTraceback(detailed=Pyro4.config.DETAILED_TRACEBACK)
if sys.platform == "cli":
util.fixIronPythonExceptionForPickle(xv, True) # piggyback attributes
return xv
def _pyroInvoke(self, methodname, vargs, kwargs, flags=0):
"""perform the remote method call communication"""
if self._pyroConnection is None:
# rebind here, don't do it from inside the invoke because deadlock will occur
self.__pyroCreateConnection()
if methodname in self._pyroAsyncs:
flags |= MessageFactory.FLAGS_ASYNC
future = futures.ClientFuture(self)
# daemon needed to register the special asynchronous calls
if not self._pyroFutureDaemon:
self.__pyroCreateFutureDaemon()
self._pyroFutureDaemon.register(future)
logging.debug("Going to send client future %s", self._pyroFutureDaemon.uriFor(future))
vargs = (future,) + vargs # special way to send the future
data, compressed=self._pyroSerializer.serialize(
(self._pyroConnection.objectId, methodname, vargs, kwargs),
compress=Pyro4.config.COMPRESSION)
if compressed:
flags |= MessageFactory.FLAGS_COMPRESSED
if methodname in self._pyroOneway:
flags |= MessageFactory.FLAGS_ONEWAY
with self.__pyroLock:
self._pyroSeq=(self._pyroSeq+1)&0xffff
data=MessageFactory.createMessage(MessageFactory.MSG_INVOKE, data, flags, self._pyroSeq)
try:
self._pyroConnection.send(data)
del data # invite GC to collect the object, don't wait for out-of-scope
if flags & MessageFactory.FLAGS_ONEWAY:
return None # oneway call, no response data
# TODO methods marked both oneway and isasync should returning an ImmediateFuture with None as result
elif flags & MessageFactory.FLAGS_ASYNC:
return future
else:
msgType, flags, seq, data = MessageFactory.getMessage(self._pyroConnection, MessageFactory.MSG_RESULT)
self.__pyroCheckSequence(seq)
data=self._pyroSerializer.deserialize(data, compressed=flags & MessageFactory.FLAGS_COMPRESSED)
if flags & MessageFactory.FLAGS_EXCEPTION:
if sys.platform=="cli":
util.fixIronPythonExceptionForPickle(data, False)
raise data
else:
return data
except (errors.CommunicationError, KeyboardInterrupt):
# Communication error during read. To avoid corrupt transfers, we close the connection.
# Otherwise we might receive the previous reply as a result of a new methodcall!
# Special case for keyboardinterrupt: people pressing ^C to abort the client
# may be catching the keyboardinterrupt in their code. We should probably be on the
# safe side and release the proxy connection in this case too, because they might
# be reusing the proxy object after catching the exception...
self._pyroRelease()
raise
def _pyroInvoke(self, methodname, vargs, kwargs, flags=0):
"""perform the remote method call communication"""
if self._pyroConnection is None:
# rebind here, don't do it from inside the invoke because deadlock will occur
self.__pyroCreateConnection()
serializer = util.get_serializer(Pyro4.config.SERIALIZER)
data, compressed = serializer.serializeCall(
self._pyroConnection.objectId, methodname, vargs, kwargs,
compress=Pyro4.config.COMPRESSION)
if compressed:
flags |= Pyro4.message.FLAGS_COMPRESSED
if methodname in self._pyroOneway:
flags |= Pyro4.message.FLAGS_ONEWAY
with self.__pyroLock:
self._pyroSeq=(self._pyroSeq+1)&0xffff
if Pyro4.config.LOGWIRE:
log.debug("proxy wiredata sending: msgtype=%d flags=0x%x ser=%d seq=%d data=%r" % (Pyro4.message.MSG_INVOKE, flags, serializer.serializer_id, self._pyroSeq, data))
msg = Message(Pyro4.message.MSG_INVOKE, data, serializer.serializer_id, flags, self._pyroSeq)
try:
self._pyroConnection.send(msg.to_bytes())
del msg # invite GC to collect the object, don't wait for out-of-scope
if flags & Pyro4.message.FLAGS_ONEWAY:
return None # oneway call, no response data
else:
msg = Message.recv(self._pyroConnection, [Pyro4.message.MSG_RESULT])
if Pyro4.config.LOGWIRE:
log.debug("proxy wiredata received: msgtype=%d flags=0x%x ser=%d seq=%d data=%r" % (msg.type, msg.flags, msg.serializer_id, msg.seq, msg.data))
self.__pyroCheckSequence(msg.seq)
if msg.serializer_id != serializer.serializer_id:
error = "invalid serializer in response: %d" % msg.serializer_id
log.error(error)
raise errors.ProtocolError(error)
data = serializer.deserializeData(msg.data, compressed=msg.flags & Pyro4.message.FLAGS_COMPRESSED)
if msg.flags & Pyro4.message.FLAGS_EXCEPTION:
if sys.platform=="cli":
util.fixIronPythonExceptionForPickle(data, False)
raise data
else:
return data
except (errors.CommunicationError, KeyboardInterrupt):
# Communication error during read. To avoid corrupt transfers, we close the connection.
# Otherwise we might receive the previous reply as a result of a new methodcall!
# Special case for keyboardinterrupt: people pressing ^C to abort the client
# may be catching the keyboardinterrupt in their code. We should probably be on the
# safe side and release the proxy connection in this case too, because they might
# be reusing the proxy object after catching the exception...
self._pyroRelease()
raise
def _sendExceptionResponse(self, connection, seq, exc_value, tbinfo):
"""send an exception back including the local traceback info"""
exc_value._pyroTraceback=tbinfo
if sys.platform=="cli":
util.fixIronPythonExceptionForPickle(exc_value, True) # piggyback attributes
try:
data, _=self.serializer.serialize(exc_value)
except:
# the exception object couldn't be serialized, use a generic PyroError instead
xt, xv, tb = sys.exc_info()
msg = "Error serializing exception: %s. Original exception: %s: %s" % (str(xv), type(exc_value), str(exc_value))
exc_value = errors.PyroError(msg)
exc_value._pyroTraceback=tbinfo
if sys.platform=="cli":
util.fixIronPythonExceptionForPickle(exc_value, True) # piggyback attributes
data, _=self.serializer.serialize(exc_value)
msg=MessageFactory.createMessage(MessageFactory.MSG_RESULT, data, MessageFactory.FLAGS_EXCEPTION, seq)
del data
connection.send(msg)
def _build_response(self, result):
log = logger.debug
# Determine appropriate response type
if self.request.type == message.MSG_PING:
msg_type = message.MSG_PING
elif self.request.type == message.MSG_INVOKE:
msg_type = message.MSG_RESULT
else:
err = "Attempting to respond to invalid message type."
log.exception(err)
raise errors.ProtocolError(err)
flags = 0
# Serialize and set flags
serializer = util.get_serializer_by_id(self.request.serializer_id)
try:
data, compressed = serializer.serializeData(result)
except:
# the exception object couldn't be serialized, use a generic PyroError instead
xt, xv, tb = sys.exc_info()
msg = "Error serializing exception: %s. Original exception: %s: %s" % (str(xv), type(xv), str(xv))
exc_value = errors.PyroError(msg)
exc_value._pyroTraceback = tb
if sys.platform == "cli":
util.fixIronPythonExceptionForPickle(exc_value, True) # piggyback attributes
data, compressed = serializer.serializeData(exc_value)
if compressed:
flags |= message.FLAGS_COMPRESSED
if self.request.flags & Pyro4.message.FLAGS_BATCH:
flags |= Pyro4.message.FLAGS_BATCH
if isinstance(result, Exception):
flags = message.FLAGS_EXCEPTION
if Pyro4.config.LOGWIRE:
log("daemon wiredata sending (error response): msgtype=%d flags=0x%x ser=%d seq=%d data=%r" %
(msg_type, flags, serializer.serializer_id, self.request.seq, data))
elif self.request.type == message.MSG_PING or self.request.type == message.MSG_INVOKE:
if Pyro4.config.LOGWIRE:
log("daemon wiredata sending: msgtype=%d flags=0x%x ser=%d seq=%d data=%r" %
(msg_type, flags, serializer.serializer_id, self.request.seq, data))
return Message(msg_type, data, serializer.serializer_id, flags, self.request.seq)
def raiseIt(self):
if sys.platform=="cli":
util.fixIronPythonExceptionForPickle(self.exception, False)
raise self.exception
def raiseIt(self):
if sys.platform == "cli":
util.fixIronPythonExceptionForPickle(self.exception, False)
raise self.exception
def raiseIt(self):
from Pyro4.util import fixIronPythonExceptionForPickle # XXX circular
if sys.platform == "cli":
fixIronPythonExceptionForPickle(self.exception, False)
raise self.exception
def raiseIt(self):
from Pyro4.util import fixIronPythonExceptionForPickle # XXX circular
if sys.platform == "cli":
fixIronPythonExceptionForPickle(self.exception, False)
raise self.exception
def handleRequest(self, conn):
"""
Handle incoming Pyro request. Catches any exception that may occur and
wraps it in a reply to the calling side, as to not make this server side loop
terminate due to exceptions caused by remote invocations.
"""
request_flags = 0
request_seq = 0
request_serializer_id = util.MarshalSerializer.serializer_id
wasBatched = False
isCallback = False
try:
msg = Message.recv(
conn, [Pyro4.message.MSG_INVOKE, Pyro4.message.MSG_PING])
request_flags = msg.flags
request_seq = msg.seq
request_serializer_id = msg.serializer_id
if Pyro4.config.LOGWIRE:
log.debug(
"daemon wiredata received: msgtype=%d flags=0x%x ser=%d seq=%d data=%r"
% (msg.type, msg.flags, msg.serializer_id, msg.seq,
msg.data))
if msg.type == Pyro4.message.MSG_PING:
# return same seq, but ignore any data (it's a ping, not an echo). Nothing is deserialized.
msg = Message(Pyro4.message.MSG_PING, b"pong",
msg.serializer_id, 0, msg.seq)
if Pyro4.config.LOGWIRE:
log.debug(
"daemon wiredata sending: msgtype=%d flags=0x%x ser=%d seq=%d data=%r"
% (msg.type, msg.flags, msg.serializer_id, msg.seq,
msg.data))
conn.send(msg.to_bytes())
return
if msg.serializer_id not in self.__serializer_ids:
raise errors.ProtocolError(
"message used serializer that is not accepted: %d" %
msg.serializer_id)
serializer = util.get_serializer_by_id(msg.serializer_id)
objId, method, vargs, kwargs = serializer.deserializeCall(
msg.data,
compressed=msg.flags & Pyro4.message.FLAGS_COMPRESSED)
del msg # invite GC to collect the object, don't wait for out-of-scope
obj = self.objectsById.get(objId)
if obj is not None:
if kwargs and sys.version_info < (2, 6,
5) and os.name != "java":
# Python before 2.6.5 doesn't accept unicode keyword arguments
kwargs = dict((str(k), kwargs[k]) for k in kwargs)
if request_flags & Pyro4.message.FLAGS_BATCH:
# batched method calls, loop over them all and collect all results
data = []
for method, vargs, kwargs in vargs:
method = util.resolveDottedAttribute(
obj, method, Pyro4.config.DOTTEDNAMES)
try:
result = method(
*vargs, **kwargs
) # this is the actual method call to the Pyro object
except Exception:
xt, xv = sys.exc_info()[0:2]
log.debug(
"Exception occurred while handling batched request: %s",
xv)
xv._pyroTraceback = util.formatTraceback(
detailed=Pyro4.config.DETAILED_TRACEBACK)
if sys.platform == "cli":
util.fixIronPythonExceptionForPickle(
xv, True) # piggyback attributes
data.append(futures._ExceptionWrapper(xv))
break # stop processing the rest of the batch
else:
data.append(result)
wasBatched = True
else:
# normal single method call
method = util.resolveDottedAttribute(
obj, method, Pyro4.config.DOTTEDNAMES)
if request_flags & Pyro4.message.FLAGS_ONEWAY and Pyro4.config.ONEWAY_THREADED:
# oneway call to be run inside its own thread
thread = threadutil.Thread(target=method,
args=vargs,
kwargs=kwargs)
thread.setDaemon(True)
thread.start()
else:
isCallback = getattr(method, "_pyroCallback", False)
data = method(
*vargs, **kwargs
) # this is the actual method call to the Pyro object
else:
log.debug("unknown object requested: %s", objId)
raise errors.DaemonError("unknown object")
if request_flags & Pyro4.message.FLAGS_ONEWAY:
return # oneway call, don't send a response
else:
data, compressed = serializer.serializeData(
data, compress=Pyro4.config.COMPRESSION)
response_flags = 0
if compressed:
response_flags |= Pyro4.message.FLAGS_COMPRESSED
if wasBatched:
response_flags |= Pyro4.message.FLAGS_BATCH
if Pyro4.config.LOGWIRE:
log.debug(
"daemon wiredata sending: msgtype=%d flags=0x%x ser=%d seq=%d data=%r"
% (Pyro4.message.MSG_RESULT, response_flags,
serializer.serializer_id, request_seq, data))
msg = Message(Pyro4.message.MSG_RESULT, data,
serializer.serializer_id, response_flags,
request_seq)
conn.send(msg.to_bytes())
except Exception:
xt, xv = sys.exc_info()[0:2]
if xt is not errors.ConnectionClosedError:
log.debug("Exception occurred while handling request: %r", xv)
if not request_flags & Pyro4.message.FLAGS_ONEWAY:
# only return the error to the client if it wasn't a oneway call
tblines = util.formatTraceback(
detailed=Pyro4.config.DETAILED_TRACEBACK)
self._sendExceptionResponse(conn, request_seq,
request_serializer_id, xv,
tblines)
if isCallback or isinstance(
xv, (errors.CommunicationError, errors.SecurityError)):
raise # re-raise if flagged as callback, communication or security error.
def handleRequest(self, conn):
"""
Handle incoming Pyro request. Catches any exception that may occur and
wraps it in a reply to the calling side, as to not make this server side loop
terminate due to exceptions caused by remote invocations.
"""
flags=0
seq=0
wasBatched=False
isCallback=False
client_future = None
try:
msgType, flags, seq, data = MessageFactory.getMessage(conn, MessageFactory.MSG_INVOKE)
objId, method, vargs, kwargs=self.serializer.deserialize(
data, compressed=flags & MessageFactory.FLAGS_COMPRESSED)
del data # invite GC to collect the object, don't wait for out-of-scope
obj=self.objectsById.get(objId)
if flags & MessageFactory.FLAGS_ASYNC:
client_future = vargs[0]
client_future._pyroOneway.update(["set_cancelled", "set_result", "set_exception", "set_progress"])
vargs = vargs[1:]
elif flags & MessageFactory.FLAGS_ASYNC_CANCEL:
client_future_uri = vargs[0]
if obj is not None:
if kwargs and sys.version_info<(2, 6, 5) and os.name!="java":
# Python before 2.6.5 doesn't accept unicode keyword arguments
kwargs = dict((str(k), kwargs[k]) for k in kwargs)
if flags & MessageFactory.FLAGS_BATCH:
# batched method calls, loop over them all and collect all results
data=[]
for method,vargs,kwargs in vargs:
method=util.resolveDottedAttribute(obj, method, Pyro4.config.DOTTEDNAMES)
try:
result=method(*vargs, **kwargs) # this is the actual method call to the Pyro object
except Exception:
xt,xv=sys.exc_info()[0:2]
log.debug("Exception occurred while handling batched request: %s", xv)
xv._pyroTraceback=util.formatTraceback(detailed=Pyro4.config.DETAILED_TRACEBACK)
if sys.platform=="cli":
util.fixIronPythonExceptionForPickle(xv, True) # piggyback attributes
data.append(futures._ExceptionWrapper(xv))
break # stop processing the rest of the batch
else:
data.append(result)
wasBatched=True
elif flags & MessageFactory.FLAGS_ASYNC_CANCEL:
data=self._cancelFuture(client_future_uri)
else:
# normal single method call
method=util.resolveDottedAttribute(obj, method, Pyro4.config.DOTTEDNAMES)
if flags & MessageFactory.FLAGS_ONEWAY and Pyro4.config.ONEWAY_THREADED:
# oneway call to be run inside its own thread
thread=threadutil.Thread(target=method, args=vargs, kwargs=kwargs)
thread.setDaemon(True)
thread.start()
elif flags & MessageFactory.FLAGS_ASYNC:
future=method(*vargs, **kwargs)
self._followFuture(future, client_future)
else:
isCallback=getattr(method, "_pyroCallback", False)
data=method(*vargs, **kwargs) # this is the actual method call to the Pyro object
else:
log.debug("unknown object requested: %s", objId)
raise errors.DaemonError("unknown object")
if flags & MessageFactory.FLAGS_ONEWAY:
return # oneway call, don't send a response
elif flags & MessageFactory.FLAGS_ASYNC:
return # async call, don't send a response yet
else:
data, compressed=self.serializer.serialize(data, compress=Pyro4.config.COMPRESSION)
flags=0
if compressed:
flags |= MessageFactory.FLAGS_COMPRESSED
if wasBatched:
flags |= MessageFactory.FLAGS_BATCH
msg=MessageFactory.createMessage(MessageFactory.MSG_RESULT, data, flags, seq)
del data
conn.send(msg)
except Exception as ex:
xt,xv=sys.exc_info()[0:2]
if xt is not errors.ConnectionClosedError:
log.debug("Exception occurred while handling request: %r", xv)
if client_future is not None:
# send exception to the client future
client_future.set_exception(ex)
elif not flags & MessageFactory.FLAGS_ONEWAY:
# only return the error to the client if it wasn't a oneway call
tblines=util.formatTraceback(detailed=Pyro4.config.DETAILED_TRACEBACK)
self._sendExceptionResponse(conn, seq, xv, tblines)
if isCallback or isinstance(xv, (errors.CommunicationError, errors.SecurityError)):
raise # re-raise if flagged as callback, communication or security error.