opcua.server.UaProcessor._process_message() - Code Metrics - Inspection of "SQL History storage" - FreeOpcUa/python-opcua - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#158)

by Olivier

created 2016-04-12 18:02 UTC

opcua.server.UaProcessor._process_message() F

↳ Parent: UaProcessor

Complexity

Conditions

Size

Total Lines

297

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	165
CRAP Score	36.2908

Metric	Value
cc	30
dl	0
loc	297
ccs	165
cts	204
cp	0.8088
crap	36.2908
rs	2

How to fix Long Method Complexity


import logging
from threading import RLock, Lock
from datetime import datetime
import time

from opcua import ua
from opcua.common import utils


class PublishRequestData(object):

    def __init__(self):
        self.requesthdr = None
        self.algohdr = None
        self.seqhdr = None
        self.timestamp = time.time()


class UaProcessor(object):

    def __init__(self, internal_server, socket):
        self.logger = logging.getLogger(__name__)
        self.iserver = internal_server
        self.name = socket.get_extra_info('peername')
        self.sockname = socket.get_extra_info('sockname')
        self.session = None
        self.channel = None
        self.socket = socket
        self._socketlock = Lock()
        self._datalock = RLock()
        self._publishdata_queue = []
        self._publish_result_queue = []  # used when we need to wait for PublishRequest
        self._connection = ua.SecureConnection(ua.SecurityPolicy())

    def set_policies(self, policies):
        self._connection.set_policy_factories(policies)

    def send_response(self, requesthandle, algohdr, seqhdr, response, msgtype=ua.MessageType.SecureMessage):
        with self._socketlock:
            response.ResponseHeader.RequestHandle = requesthandle
            data = self._connection.message_to_binary(response.to_binary(), msgtype, seqhdr.RequestId)
            self.socket.write(data)

    def open_secure_channel(self, algohdr, seqhdr, body):
        request = ua.OpenSecureChannelRequest.from_binary(body)

        self._connection.select_policy(algohdr.SecurityPolicyURI, algohdr.SenderCertificate, request.Parameters.SecurityMode)
        channel = self._open_secure_channel(request.Parameters)
        # send response
        response = ua.OpenSecureChannelResponse()
        response.Parameters = channel
        self.send_response(request.RequestHeader.RequestHandle, algohdr, seqhdr, response, ua.MessageType.SecureOpen)

    def forward_publish_response(self, result):
        self.logger.info("forward publish response %s", result)
        with self._datalock:
            while True:
                if len(self._publishdata_queue) == 0:
                    self._publish_result_queue.append(result)
                    self.logger.info("Server wants to send publish answer but no publish request is available, enqueing notification, length of result queue is %s", len(self._publish_result_queue))
                    return
                requestdata = self._publishdata_queue.pop(0)
                if time.time() - requestdata.timestamp < requestdata.requesthdr.TimeoutHint / 1000:
                    break

        response = ua.PublishResponse()
        response.Parameters = result

        self.send_response(requestdata.requesthdr.RequestHandle, requestdata.algohdr, requestdata.seqhdr, response)

    def process(self, header, body):
        msg = self._connection.receive_from_header_and_body(header, body)
        if isinstance(msg, ua.Message):
            if header.MessageType == ua.MessageType.SecureOpen:
                self.open_secure_channel(msg.SecurityHeader(), msg.SequenceHeader(), msg.body())

            elif header.MessageType == ua.MessageType.SecureClose:
                if not self.channel or header.ChannelId != self.channel.SecurityToken.ChannelId:
                    self.logger.warning("Request to close channel %s which was not issued, current channel is %s", header.ChannelId, self.channel)
                return False

            elif header.MessageType == ua.MessageType.SecureMessage:
                return self.process_message(msg.SecurityHeader(), msg.SequenceHeader(), msg.body())

        elif isinstance(msg, ua.Hello):
            ack = ua.Acknowledge()
            ack.ReceiveBufferSize = msg.ReceiveBufferSize
            ack.SendBufferSize = msg.SendBufferSize
            data = self._connection.tcp_to_binary(ua.MessageType.Acknowledge, ack)
            self.socket.write(data)

        elif isinstance(msg, ua.ErrorMessage):
            self.logger.warning("Received an error message type")

        else:
            self.logger.warning("Unsupported message type: %s", header.MessageType)
            raise utils.ServiceError(ua.StatusCodes.BadTcpMessageTypeInvalid)
        return True

    def process_message(self, algohdr, seqhdr, body):
        typeid = ua.NodeId.from_binary(body)
        requesthdr = ua.RequestHeader.from_binary(body)
        try:
            return self._process_message(typeid, requesthdr, algohdr, seqhdr, body)
        except utils.ServiceError as e:
            status = ua.StatusCode(e.code)
            response = ua.ServiceFault()
            response.ResponseHeader.ServiceResult = status
            self.logger.info("sending service fault response: %s (%s)", status.doc, status.name)
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
            return True

    def _process_message(self, typeid, requesthdr, algohdr, seqhdr, body):
        if typeid == ua.NodeId(ua.ObjectIds.CreateSessionRequest_Encoding_DefaultBinary):
            self.logger.info("Create session request")
            params = ua.CreateSessionParameters.from_binary(body)

            self.session = self.iserver.create_session(self.name, external=True)  # create the session on server
            sessiondata = self.session.create_session(params, sockname=self.sockname)  # get a session creation result to send back

            response = ua.CreateSessionResponse()
            response.Parameters = sessiondata
            response.Parameters.ServerCertificate = self._connection._security_policy.client_certificate
            if self._connection._security_policy.server_certificate is None:
                data = params.ClientNonce
            else:
                data = self._connection._security_policy.server_certificate + params.ClientNonce
            response.Parameters.ServerSignature.Signature = self._connection._security_policy.asymmetric_cryptography.signature(data)
            response.Parameters.ServerSignature.Algorithm = "http://www.w3.org/2000/09/xmldsig#rsa-sha1"

            self.logger.info("sending create sesssion response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.CloseSessionRequest_Encoding_DefaultBinary):
            self.logger.info("Close session request")
            deletesubs = ua.unpack_uatype('Boolean', body)

            self.session.close_session(deletesubs)

            response = ua.CloseSessionResponse()
            self.logger.info("sending close sesssion response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.ActivateSessionRequest_Encoding_DefaultBinary):
            self.logger.info("Activate session request")
            params = ua.ActivateSessionParameters.from_binary(body)

            if not self.session:
                self.logger.info("request to activate non-existing session")
                raise utils.ServiceError(ua.StatusCodes.BadSessionIdInvalid)

            if self._connection._security_policy.client_certificate is None:
                data = self.session.nonce
            else:
                data = self._connection._security_policy.client_certificate + self.session.nonce
            self._connection._security_policy.asymmetric_cryptography.verify(data, params.ClientSignature.Signature)

            result = self.session.activate_session(params)

            response = ua.ActivateSessionResponse()
            response.Parameters = result

            self.logger.info("sending read response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.ReadRequest_Encoding_DefaultBinary):
            self.logger.info("Read request")
            params = ua.ReadParameters.from_binary(body)

            results = self.session.read(params)

            response = ua.ReadResponse()
            response.Results = results

            self.logger.info("sending read response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.WriteRequest_Encoding_DefaultBinary):
            self.logger.info("Write request")
            params = ua.WriteParameters.from_binary(body)

            results = self.session.write(params)

            response = ua.WriteResponse()
            response.Results = results

            self.logger.info("sending write response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.BrowseRequest_Encoding_DefaultBinary):
            self.logger.info("Browse request")
            params = ua.BrowseParameters.from_binary(body)

            results = self.session.browse(params)

            response = ua.BrowseResponse()
            response.Results = results

            self.logger.info("sending browse response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.GetEndpointsRequest_Encoding_DefaultBinary):
            self.logger.info("get endpoints request")
            params = ua.GetEndpointsParameters.from_binary(body)

            endpoints = self.iserver.get_endpoints(params, sockname=self.sockname)

            response = ua.GetEndpointsResponse()
            response.Endpoints = endpoints

            self.logger.info("sending get endpoints response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.FindServersRequest_Encoding_DefaultBinary):
            self.logger.info("find servers request")
            params = ua.FindServersParameters.from_binary(body)

            servers = self.iserver.find_servers(params)

            response = ua.FindServersResponse()
            response.Servers = servers

            self.logger.info("sending find servers response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.RegisterServerRequest_Encoding_DefaultBinary):
            self.logger.info("register server request")
            serv = ua.RegisteredServer.from_binary(body)

            self.iserver.register_server(serv)

            response = ua.RegisterServerResponse()

            self.logger.info("sending register server response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.RegisterServer2Request_Encoding_DefaultBinary):
            self.logger.info("register server 2 request")
            params = ua.RegisterServer2Parameters.from_binary(body)

            results = self.iserver.register_server2(params)

            response = ua.RegisterServer2Response()
            response.ConfigurationResults = results

            self.logger.info("sending register server 2 response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.TranslateBrowsePathsToNodeIdsRequest_Encoding_DefaultBinary):
            self.logger.info("translate browsepaths to nodeids request")
            params = ua.TranslateBrowsePathsToNodeIdsParameters.from_binary(body)

            paths = self.session.translate_browsepaths_to_nodeids(params.BrowsePaths)

            response = ua.TranslateBrowsePathsToNodeIdsResponse()
            response.Results = paths

            self.logger.info("sending translate browsepaths to nodeids response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.AddNodesRequest_Encoding_DefaultBinary):
            self.logger.info("add nodes request")
            params = ua.AddNodesParameters.from_binary(body)

            results = self.session.add_nodes(params.NodesToAdd)

            response = ua.AddNodesResponse()
            response.Results = results

            self.logger.info("sending add node response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.DeleteNodesRequest_Encoding_DefaultBinary):
            self.logger.info("delete nodes request")
            params = ua.DeleteNodesParameters.from_binary(body)

            results = self.session.delete_nodes(params.NodesToDelete)

            response = ua.DeleteNodesResponse()
            response.Results = results

            self.logger.info("sending delete node response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.CreateSubscriptionRequest_Encoding_DefaultBinary):
            self.logger.info("create subscription request")
            params = ua.CreateSubscriptionParameters.from_binary(body)

            result = self.session.create_subscription(params, self.forward_publish_response)

            response = ua.CreateSubscriptionResponse()
            response.Parameters = result

            self.logger.info("sending create subscription response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.DeleteSubscriptionsRequest_Encoding_DefaultBinary):
            self.logger.info("delete subscriptions request")
            params = ua.DeleteSubscriptionsParameters.from_binary(body)

            results = self.session.delete_subscriptions(params.SubscriptionIds)

            response = ua.DeleteSubscriptionsResponse()
            response.Results = results

            self.logger.info("sending delte subscription response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.CreateMonitoredItemsRequest_Encoding_DefaultBinary):
            self.logger.info("create monitored items request")
            params = ua.CreateMonitoredItemsParameters.from_binary(body)
            results = self.session.create_monitored_items(params)

            response = ua.CreateMonitoredItemsResponse()
            response.Results = results

            self.logger.info("sending create monitored items response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.ModifyMonitoredItemsRequest_Encoding_DefaultBinary):
            self.logger.info("modify monitored items request")
            params = ua.ModifyMonitoredItemsParameters.from_binary(body)
            results = self.session.modify_monitored_items(params)

            response = ua.ModifyMonitoredItemsResponse()
            response.Results = results

            self.logger.info("sending modify monitored items response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.DeleteMonitoredItemsRequest_Encoding_DefaultBinary):
            self.logger.info("delete monitored items request")
            params = ua.DeleteMonitoredItemsParameters.from_binary(body)

            results = self.session.delete_monitored_items(params)

            response = ua.DeleteMonitoredItemsResponse()
            response.Results = results

            self.logger.info("sending delete monitored items response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.HistoryReadRequest_Encoding_DefaultBinary):
            self.logger.info("history read request")
            params = ua.HistoryReadParameters.from_binary(body)

            results = self.session.history_read(params)

            response = ua.HistoryReadResponse()
            response.Results = results

            self.logger.info("sending history read response")
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.PublishRequest_Encoding_DefaultBinary):
            self.logger.info("publish request")

            if not self.session:
                return False

            params = ua.PublishParameters.from_binary(body)

            data = PublishRequestData()
            data.requesthdr = requesthdr
            data.seqhdr = seqhdr
            data.algohdr = algohdr
            with self._datalock:
                self._publishdata_queue.append(data)  # will be used to send publish answers from server
                if self._publish_result_queue:
                    result = self._publish_result_queue.pop(0)
                    self.forward_publish_response(result)
            self.session.publish(params.SubscriptionAcknowledgements)
            self.logger.info("publish forward to server")

        elif typeid == ua.NodeId(ua.ObjectIds.RepublishRequest_Encoding_DefaultBinary):
            self.logger.info("re-publish request")

            params = ua.RepublishParameters.from_binary(body)
            msg = self.session.republish(params)

            response = ua.RepublishResponse()
            response.NotificationMessage = msg

            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        elif typeid == ua.NodeId(ua.ObjectIds.CloseSecureChannelRequest_Encoding_DefaultBinary):
            self.logger.info("close secure channel request")
            response = ua.CloseSecureChannelResponse()
            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
            self.channel = None
            return False

        elif typeid == ua.NodeId(ua.ObjectIds.CallRequest_Encoding_DefaultBinary):
            self.logger.info("call request")

            params = ua.CallParameters.from_binary(body)

            results = self.session.call(params.MethodsToCall)

            response = ua.CallResponse()
            response.Results = results

            self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)

        else:
            self.logger.warning("Unknown message received %s", typeid)
            raise utils.ServiceError(ua.StatusCodes.BadNotImplemented)

        return True

    def _open_secure_channel(self, params):
        self.logger.info("open secure channel")
        if not self.channel or params.RequestType == ua.SecurityTokenRequestType.Issue:
            self.channel = ua.OpenSecureChannelResult()
            self.channel.SecurityToken.TokenId = 13  # random value
            self.channel.SecurityToken.ChannelId = self.iserver.get_new_channel_id()
            self.channel.SecurityToken.RevisedLifetime = params.RequestedLifetime
        self.channel.SecurityToken.TokenId += 1
        self.channel.SecurityToken.CreatedAt = datetime.utcnow()
        self.channel.SecurityToken.RevisedLifetime = params.RequestedLifetime
        self.channel.ServerNonce = utils.create_nonce(self._connection._security_policy.symmetric_key_size)
        self._connection.set_security_token(self.channel.SecurityToken)
        self._connection._security_policy.make_symmetric_key(self.channel.ServerNonce, params.ClientNonce)
        return self.channel

    def close(self):
        """
        to be called when client has disconnected to ensure we really close
        everything we should
        """
        print("Cleanup client connection: ", self.name)
        if self.session:
            self.session.close_session(True)


1
2	1	import logging
3	1	from threading import RLock, Lock
4	1	from datetime import datetime
5	1	import time
6
7	1	from opcua import ua
8	1	from opcua.common import utils
9
10
11	1	class PublishRequestData(object):
12
13	1	def __init__(self):
14	1	self.requesthdr = None
15	1	self.algohdr = None
16	1	self.seqhdr = None
17	1	self.timestamp = time.time()
18
19
20	1	class UaProcessor(object):
21
22	1	def __init__(self, internal_server, socket):
23	1	self.logger = logging.getLogger(__name__)
24	1	self.iserver = internal_server
25	1	self.name = socket.get_extra_info('peername')
26	1	self.sockname = socket.get_extra_info('sockname')
27	1	self.session = None
28	1	self.channel = None
29	1	self.socket = socket
30	1	self._socketlock = Lock()
31	1	self._datalock = RLock()
32	1	self._publishdata_queue = []
33	1	self._publish_result_queue = [] # used when we need to wait for PublishRequest
34	1	self._connection = ua.SecureConnection(ua.SecurityPolicy())
35
36	1	def set_policies(self, policies):
37	1	self._connection.set_policy_factories(policies)
38
39	1	def send_response(self, requesthandle, algohdr, seqhdr, response, msgtype=ua.MessageType.SecureMessage):
40	1	with self._socketlock:
41	1	response.ResponseHeader.RequestHandle = requesthandle
42	1	data = self._connection.message_to_binary(response.to_binary(), msgtype, seqhdr.RequestId)
43	1	self.socket.write(data)
44
45	1	def open_secure_channel(self, algohdr, seqhdr, body):
46	1	request = ua.OpenSecureChannelRequest.from_binary(body)
47
48	1	self._connection.select_policy(algohdr.SecurityPolicyURI, algohdr.SenderCertificate, request.Parameters.SecurityMode)
49	1	channel = self._open_secure_channel(request.Parameters)
50		# send response
51	1	response = ua.OpenSecureChannelResponse()
52	1	response.Parameters = channel
53	1	self.send_response(request.RequestHeader.RequestHandle, algohdr, seqhdr, response, ua.MessageType.SecureOpen)
54
55	1	def forward_publish_response(self, result):
56	1	self.logger.info("forward publish response %s", result)
57	1	with self._datalock:
58	1	while True:
59	1	if len(self._publishdata_queue) == 0:
60		self._publish_result_queue.append(result)
61		self.logger.info("Server wants to send publish answer but no publish request is available, enqueing notification, length of result queue is %s", len(self._publish_result_queue))
62		return
63	1	requestdata = self._publishdata_queue.pop(0)
64	1	if time.time() - requestdata.timestamp < requestdata.requesthdr.TimeoutHint / 1000:
65	1	break
66
67	1	response = ua.PublishResponse()
68	1	response.Parameters = result
69
70	1	self.send_response(requestdata.requesthdr.RequestHandle, requestdata.algohdr, requestdata.seqhdr, response)
71
72	1	def process(self, header, body):
73	1	msg = self._connection.receive_from_header_and_body(header, body)
74	1	if isinstance(msg, ua.Message):
75	1	if header.MessageType == ua.MessageType.SecureOpen:
76	1	self.open_secure_channel(msg.SecurityHeader(), msg.SequenceHeader(), msg.body())
77
78	1	elif header.MessageType == ua.MessageType.SecureClose:
79	1	if not self.channel or header.ChannelId != self.channel.SecurityToken.ChannelId:
80		self.logger.warning("Request to close channel %s which was not issued, current channel is %s", header.ChannelId, self.channel)
81	1	return False
82
83	1	elif header.MessageType == ua.MessageType.SecureMessage:
84	1	return self.process_message(msg.SecurityHeader(), msg.SequenceHeader(), msg.body())
85
86	1	elif isinstance(msg, ua.Hello):
87	1	ack = ua.Acknowledge()
88	1	ack.ReceiveBufferSize = msg.ReceiveBufferSize
89	1	ack.SendBufferSize = msg.SendBufferSize
90	1	data = self._connection.tcp_to_binary(ua.MessageType.Acknowledge, ack)
91	1	self.socket.write(data)
92
93		elif isinstance(msg, ua.ErrorMessage):
94		self.logger.warning("Received an error message type")
95
96		else:
97		self.logger.warning("Unsupported message type: %s", header.MessageType)
98		raise utils.ServiceError(ua.StatusCodes.BadTcpMessageTypeInvalid)
99	1	return True
100
101	1	def process_message(self, algohdr, seqhdr, body):
102	1	typeid = ua.NodeId.from_binary(body)
103	1	requesthdr = ua.RequestHeader.from_binary(body)
104	1	try:
105	1	return self._process_message(typeid, requesthdr, algohdr, seqhdr, body)
106	1	except utils.ServiceError as e:
107	1	status = ua.StatusCode(e.code)
108	1	response = ua.ServiceFault()
109	1	response.ResponseHeader.ServiceResult = status
110	1	self.logger.info("sending service fault response: %s (%s)", status.doc, status.name)
111	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
112	1	return True
113
114	1	def _process_message(self, typeid, requesthdr, algohdr, seqhdr, body):
115	1	if typeid == ua.NodeId(ua.ObjectIds.CreateSessionRequest_Encoding_DefaultBinary):
116	1	self.logger.info("Create session request")
117	1	params = ua.CreateSessionParameters.from_binary(body)
118
119	1	self.session = self.iserver.create_session(self.name, external=True) # create the session on server
120	1	sessiondata = self.session.create_session(params, sockname=self.sockname) # get a session creation result to send back
121
122	1	response = ua.CreateSessionResponse()
123	1	response.Parameters = sessiondata
124	1	response.Parameters.ServerCertificate = self._connection._security_policy.client_certificate
125	1	if self._connection._security_policy.server_certificate is None:
126	1	data = params.ClientNonce
127		else:
128		data = self._connection._security_policy.server_certificate + params.ClientNonce
129	1	response.Parameters.ServerSignature.Signature = self._connection._security_policy.asymmetric_cryptography.signature(data)
130	1	response.Parameters.ServerSignature.Algorithm = "http://www.w3.org/2000/09/xmldsig#rsa-sha1"
131
132	1	self.logger.info("sending create sesssion response")
133	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
134
135	1	elif typeid == ua.NodeId(ua.ObjectIds.CloseSessionRequest_Encoding_DefaultBinary):
136	1	self.logger.info("Close session request")
137	1	deletesubs = ua.unpack_uatype('Boolean', body)
138
139	1	self.session.close_session(deletesubs)
140
141	1	response = ua.CloseSessionResponse()
142	1	self.logger.info("sending close sesssion response")
143	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
144
145	1	elif typeid == ua.NodeId(ua.ObjectIds.ActivateSessionRequest_Encoding_DefaultBinary):
146	1	self.logger.info("Activate session request")
147	1	params = ua.ActivateSessionParameters.from_binary(body)
148
149	1	if not self.session:
150		self.logger.info("request to activate non-existing session")
151		raise utils.ServiceError(ua.StatusCodes.BadSessionIdInvalid)
152
153	1	if self._connection._security_policy.client_certificate is None:
154	1	data = self.session.nonce
155		else:
156		data = self._connection._security_policy.client_certificate + self.session.nonce
157	1	self._connection._security_policy.asymmetric_cryptography.verify(data, params.ClientSignature.Signature)
158
159	1	result = self.session.activate_session(params)
160
161	1	response = ua.ActivateSessionResponse()
162	1	response.Parameters = result
163
164	1	self.logger.info("sending read response")
165	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
166
167	1	elif typeid == ua.NodeId(ua.ObjectIds.ReadRequest_Encoding_DefaultBinary):
168	1	self.logger.info("Read request")
169	1	params = ua.ReadParameters.from_binary(body)
170
171	1	results = self.session.read(params)
172
173	1	response = ua.ReadResponse()
174	1	response.Results = results
175
176	1	self.logger.info("sending read response")
177	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
178
179	1	elif typeid == ua.NodeId(ua.ObjectIds.WriteRequest_Encoding_DefaultBinary):
180	1	self.logger.info("Write request")
181	1	params = ua.WriteParameters.from_binary(body)
182
183	1	results = self.session.write(params)
184
185	1	response = ua.WriteResponse()
186	1	response.Results = results
187
188	1	self.logger.info("sending write response")
189	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
190
191	1	elif typeid == ua.NodeId(ua.ObjectIds.BrowseRequest_Encoding_DefaultBinary):
192	1	self.logger.info("Browse request")
193	1	params = ua.BrowseParameters.from_binary(body)
194
195	1	results = self.session.browse(params)
196
197	1	response = ua.BrowseResponse()
198	1	response.Results = results
199
200	1	self.logger.info("sending browse response")
201	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
202
203	1	elif typeid == ua.NodeId(ua.ObjectIds.GetEndpointsRequest_Encoding_DefaultBinary):
204	1	self.logger.info("get endpoints request")
205	1	params = ua.GetEndpointsParameters.from_binary(body)
206
207	1	endpoints = self.iserver.get_endpoints(params, sockname=self.sockname)
208
209	1	response = ua.GetEndpointsResponse()
210	1	response.Endpoints = endpoints
211
212	1	self.logger.info("sending get endpoints response")
213	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
214
215	1	elif typeid == ua.NodeId(ua.ObjectIds.FindServersRequest_Encoding_DefaultBinary):
216	1	self.logger.info("find servers request")
217	1	params = ua.FindServersParameters.from_binary(body)
218
219	1	servers = self.iserver.find_servers(params)
220
221	1	response = ua.FindServersResponse()
222	1	response.Servers = servers
223
224	1	self.logger.info("sending find servers response")
225	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
226
227	1	elif typeid == ua.NodeId(ua.ObjectIds.RegisterServerRequest_Encoding_DefaultBinary):
228	1	self.logger.info("register server request")
229	1	serv = ua.RegisteredServer.from_binary(body)
230
231	1	self.iserver.register_server(serv)
232
233	1	response = ua.RegisterServerResponse()
234
235	1	self.logger.info("sending register server response")
236	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
237
238	1	elif typeid == ua.NodeId(ua.ObjectIds.RegisterServer2Request_Encoding_DefaultBinary):
239		self.logger.info("register server 2 request")
240		params = ua.RegisterServer2Parameters.from_binary(body)
241
242		results = self.iserver.register_server2(params)
243
244		response = ua.RegisterServer2Response()
245		response.ConfigurationResults = results
246
247		self.logger.info("sending register server 2 response")
248		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
249
250	1	elif typeid == ua.NodeId(ua.ObjectIds.TranslateBrowsePathsToNodeIdsRequest_Encoding_DefaultBinary):
251	1	self.logger.info("translate browsepaths to nodeids request")
252	1	params = ua.TranslateBrowsePathsToNodeIdsParameters.from_binary(body)
253
254	1	paths = self.session.translate_browsepaths_to_nodeids(params.BrowsePaths)
255
256	1	response = ua.TranslateBrowsePathsToNodeIdsResponse()
257	1	response.Results = paths
258
259	1	self.logger.info("sending translate browsepaths to nodeids response")
260	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
261
262	1	elif typeid == ua.NodeId(ua.ObjectIds.AddNodesRequest_Encoding_DefaultBinary):
263	1	self.logger.info("add nodes request")
264	1	params = ua.AddNodesParameters.from_binary(body)
265
266	1	results = self.session.add_nodes(params.NodesToAdd)
267
268	1	response = ua.AddNodesResponse()
269	1	response.Results = results
270
271	1	self.logger.info("sending add node response")
272	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
273
274	1	elif typeid == ua.NodeId(ua.ObjectIds.DeleteNodesRequest_Encoding_DefaultBinary):
275	1	self.logger.info("delete nodes request")
276	1	params = ua.DeleteNodesParameters.from_binary(body)
277
278	1	results = self.session.delete_nodes(params.NodesToDelete)
279
280	1	response = ua.DeleteNodesResponse()
281	1	response.Results = results
282
283	1	self.logger.info("sending delete node response")
284	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
285
286	1	elif typeid == ua.NodeId(ua.ObjectIds.CreateSubscriptionRequest_Encoding_DefaultBinary):
287	1	self.logger.info("create subscription request")
288	1	params = ua.CreateSubscriptionParameters.from_binary(body)
289
290	1	result = self.session.create_subscription(params, self.forward_publish_response)
291
292	1	response = ua.CreateSubscriptionResponse()
293	1	response.Parameters = result
294
295	1	self.logger.info("sending create subscription response")
296	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
297
298	1	elif typeid == ua.NodeId(ua.ObjectIds.DeleteSubscriptionsRequest_Encoding_DefaultBinary):
299	1	self.logger.info("delete subscriptions request")
300	1	params = ua.DeleteSubscriptionsParameters.from_binary(body)
301
302	1	results = self.session.delete_subscriptions(params.SubscriptionIds)
303
304	1	response = ua.DeleteSubscriptionsResponse()
305	1	response.Results = results
306
307	1	self.logger.info("sending delte subscription response")
308	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
309
310	1	elif typeid == ua.NodeId(ua.ObjectIds.CreateMonitoredItemsRequest_Encoding_DefaultBinary):
311	1	self.logger.info("create monitored items request")
312	1	params = ua.CreateMonitoredItemsParameters.from_binary(body)
313	1	results = self.session.create_monitored_items(params)
314
315	1	response = ua.CreateMonitoredItemsResponse()
316	1	response.Results = results
317
318	1	self.logger.info("sending create monitored items response")
319	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
320
321	1	elif typeid == ua.NodeId(ua.ObjectIds.ModifyMonitoredItemsRequest_Encoding_DefaultBinary):
322		self.logger.info("modify monitored items request")
323		params = ua.ModifyMonitoredItemsParameters.from_binary(body)
324		results = self.session.modify_monitored_items(params)
325
326		response = ua.ModifyMonitoredItemsResponse()
327		response.Results = results
328
329		self.logger.info("sending modify monitored items response")
330		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
331
332	1	elif typeid == ua.NodeId(ua.ObjectIds.DeleteMonitoredItemsRequest_Encoding_DefaultBinary):
333	1	self.logger.info("delete monitored items request")
334	1	params = ua.DeleteMonitoredItemsParameters.from_binary(body)
335
336	1	results = self.session.delete_monitored_items(params)
337
338	1	response = ua.DeleteMonitoredItemsResponse()
339	1	response.Results = results
340
341	1	self.logger.info("sending delete monitored items response")
342	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
343
344	1	elif typeid == ua.NodeId(ua.ObjectIds.HistoryReadRequest_Encoding_DefaultBinary):
345		self.logger.info("history read request")
346		params = ua.HistoryReadParameters.from_binary(body)
347
348		results = self.session.history_read(params)
349
350		response = ua.HistoryReadResponse()
351		response.Results = results
352
353		self.logger.info("sending history read response")
354		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
355
356	1	elif typeid == ua.NodeId(ua.ObjectIds.PublishRequest_Encoding_DefaultBinary):
357	1	self.logger.info("publish request")
358
359	1	if not self.session:
360		return False
361
362	1	params = ua.PublishParameters.from_binary(body)
363
364	1	data = PublishRequestData()
365	1	data.requesthdr = requesthdr
366	1	data.seqhdr = seqhdr
367	1	data.algohdr = algohdr
368	1	with self._datalock:
369	1	self._publishdata_queue.append(data) # will be used to send publish answers from server
370	1	if self._publish_result_queue:
371		result = self._publish_result_queue.pop(0)
372		self.forward_publish_response(result)
373	1	self.session.publish(params.SubscriptionAcknowledgements)
374	1	self.logger.info("publish forward to server")
375
376	1	elif typeid == ua.NodeId(ua.ObjectIds.RepublishRequest_Encoding_DefaultBinary):
377		self.logger.info("re-publish request")
378
379		params = ua.RepublishParameters.from_binary(body)
380		msg = self.session.republish(params)
381
382		response = ua.RepublishResponse()
383		response.NotificationMessage = msg
384
385		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
386
387	1	elif typeid == ua.NodeId(ua.ObjectIds.CloseSecureChannelRequest_Encoding_DefaultBinary):
388		self.logger.info("close secure channel request")
389		response = ua.CloseSecureChannelResponse()
390		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
391		self.channel = None
392		return False
393
394	1	elif typeid == ua.NodeId(ua.ObjectIds.CallRequest_Encoding_DefaultBinary):
395	1	self.logger.info("call request")
396
397	1	params = ua.CallParameters.from_binary(body)
398
399	1	results = self.session.call(params.MethodsToCall)
400
401	1	response = ua.CallResponse()
402	1	response.Results = results
403
404	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
405
406		else:
407	1	self.logger.warning("Unknown message received %s", typeid)
408	1	raise utils.ServiceError(ua.StatusCodes.BadNotImplemented)
409
410	1	return True
411
412	1	def _open_secure_channel(self, params):
413	1	self.logger.info("open secure channel")
414	1	if not self.channel or params.RequestType == ua.SecurityTokenRequestType.Issue:
415	1	self.channel = ua.OpenSecureChannelResult()
416	1	self.channel.SecurityToken.TokenId = 13 # random value
417	1	self.channel.SecurityToken.ChannelId = self.iserver.get_new_channel_id()
418	1	self.channel.SecurityToken.RevisedLifetime = params.RequestedLifetime
419	1	self.channel.SecurityToken.TokenId += 1
420	1	self.channel.SecurityToken.CreatedAt = datetime.utcnow()
421	1	self.channel.SecurityToken.RevisedLifetime = params.RequestedLifetime
422	1	self.channel.ServerNonce = utils.create_nonce(self._connection._security_policy.symmetric_key_size)
423	1	self._connection.set_security_token(self.channel.SecurityToken)
424	1	self._connection._security_policy.make_symmetric_key(self.channel.ServerNonce, params.ClientNonce)
425	1	return self.channel
426
427	1	def close(self):
428		"""
429		to be called when client has disconnected to ensure we really close
430		everything we should
431		"""
432	1	print("Cleanup client connection: ", self.name)
433	1	if self.session:
434		self.session.close_session(True)
435

FreeOpcUa / python-opcua

Pull Request — master (#158)

opcua.server.UaProcessor._process_message() F

Complexity

Size

Duplication

Code Coverage

How to fix Long Method Complexity

Long Method

Complexity

Duplication Side-by-Side

Filter issues like