def get_rpc_handler(self, rpc_node, msg, grpc_channel, session,
capabilities):
try:
# Parse the request into a dictionary
log.info("rpc-node",
node=etree.tostring(rpc_node, pretty_print=True))
request = self.parse_xml_request(rpc_node)
if not request:
log.error("request-bad-format")
raise ncerror.BadMsg(rpc_node)
log.info("parsed-request", request=request)
if not request.has_key('message_id'):
log.error("request-no-message-id")
raise ncerror.BadMsg(rpc_node)
class_handler = self._get_rpc_handler(request['command'])
if class_handler is not None:
return class_handler(request, rpc_node, grpc_channel, session,
capabilities)
log.error("rpc-not-implemented", rpc=request['command'])
except ncerror.BadMsg as err:
log.info('ncerror.BadMsg')
raise ncerror.BadMsg(rpc_node)
except Exception as e:
log.exception('exception', e=e)
raise ncerror.ServerException(rpc_node, exception=e)
def _validate_parameters(self):
if self.request:
try:
if self.request['command'] != 'close-session':
self.rpc_response.is_error = True
self.rpc_response.node = ncerror.BadMsg(self.request_xml)
return
except Exception as e:
self.rpc_response.is_error = True
self.rpc_response.node = ncerror.ServerException(
self.request_xml)
return
def _validate_parameters(self):
log.info('validate-parameters', session=self.session.session_id)
# For now just validate that the command is presenf
if self.request:
try:
if self.request['command'] is None:
self.rpc_response.is_error = True
self.rpc_response.node = ncerror.BadMsg(self.request_xml)
return
except Exception as e:
self.rpc_response.is_error = True
self.rpc_response.node = ncerror.ServerException(
self.request_xml)
return
def _validate_parameters(self):
log.info('validate-parameters', session=self.session.session_id)
# Validate the GET command
if self.request:
try:
if self.request['command'] != 'get':
self.rpc_response.is_error = True
self.rpc_response.node = ncerror.BadMsg(self.request_xml)
return
if self.request.has_key('filter'):
if not self.request.has_key('class'):
self.rpc_response.is_error = True
self.rpc_response.node = ncerror.NotImpl(
self.request_xml)
return
except Exception as e:
self.rpc_response.is_error = True
self.rpc_response.node = ncerror.ServerException(
self.request_xml)
return
def handle_request(self, msg):
if not self.session.session_opened:
return
# Any error with XML encoding here is going to cause a session close
try:
tree = etree.parse(io.BytesIO(msg.encode('utf-8')))
if not tree:
raise ncerror.SessionError(msg, "Invalid XML from client.")
except etree.XMLSyntaxError:
log.error("malformed-message", msg=msg)
try:
error = ncerror.BadMsg(msg)
self.send_message(error.get_reply_msg())
except AttributeError:
log.error("attribute-error", msg=msg)
# close session
self.close()
return
rpcs = tree.xpath(C.RPC_XPATH, namespaces=C.NS_MAP)
if not rpcs:
raise ncerror.SessionError(msg, "No rpc found")
# A message can have multiple rpc requests
rpc_factory = get_rpc_factory_instance()
for rpc in rpcs:
try:
# Validate message id is received
try:
msg_id = rpc.get(C.MESSAGE_ID)
log.info("Received-rpc-message-id", msg_id=msg_id)
except (TypeError, ValueError):
log.error('no-message-id', rpc=rpc)
raise ncerror.MissingElement(msg, C.MESSAGE_ID)
# Get a rpc handler
rpc_handler = rpc_factory.get_rpc_handler(
rpc, msg, self.grpc_client, self.session,
self.capabilities)
if rpc_handler:
# set the parameters for this handler
response = yield rpc_handler.execute()
log.info('handler',
rpc_handler=rpc_handler,
is_error=response.is_error,
custom_rpc=response.custom_rpc,
response=response)
if not response.is_error:
if response.custom_rpc:
self.send_custom_rpc_reply(response.node, rpc)
else:
self.send_rpc_reply(response.node, rpc)
# self.send_rpc_reply(self.get_mock_volthainstance(), rpc)
else:
self.send_message(response.node.get_xml_reply())
if response.close_session:
log.info('response-closing-session', response=response)
self.close()
else:
log.error('no-rpc-handler',
request=msg,
session_id=self.session.session_id)
error = ncerror.NotImpl(rpc)
self.send_message(error.get_xml_reply())
except ncerror.BadMsg as err:
log.info('ncerror.BadMsg')
if self.new_framing:
self.send_message(err.get_xml_reply())
else:
# If we are 1.0 we have to simply close the connection
# as we are not allowed to send this error
log.error("Closing-1-0-session--malformed-message")
self.close()
except (ncerror.NotImpl, ncerror.MissingElement) as e:
log.exception('error', e=e)
self.send_message(e.get_reply_msg())
except Exception as e:
log.exception('Exception', e=e)
error = ncerror.ServerException(rpc, e)
self.send_message(error.get_xml_reply())
