opcua.UAProcessor._process_message() - Code Metrics - Inspection of "discovery implementation" - FreeOpcUa/python-opcua - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#70)

by Olivier

created 2015-12-15 10:32 UTC

opcua.UAProcessor._process_message() F

↳ Parent: opcua.UAProcessor

Complexity

Conditions

Size

Total Lines

257

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	145
CRAP Score	28.1471

Metric	Value
dl	0
loc	257
ccs	145
cts	175
cp	0.8286
rs	2
cc	25
crap	28.1471

How to fix Long Method Complexity


import logging
from threading import Lock
from datetime import datetime

from opcua import ua
from opcua import utils


class PublishRequestData(object):

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


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 = Lock()
        self._publishdata_queue = []
        self._seq_number = 1

    def send_response(self, requesthandle, algohdr, seqhdr, response, msgtype=ua.MessageType.SecureMessage):
        with self._socketlock:
            response.ResponseHeader.RequestHandle = requesthandle
            seqhdr.SequenceNumber = self._seq_number
            self._seq_number += 1
            hdr = ua.Header(msgtype, ua.ChunkType.Single, self.channel.SecurityToken.ChannelId)
            if isinstance(algohdr, ua.SymmetricAlgorithmHeader):
                algohdr.TokenId = self.channel.SecurityToken.TokenId
            self._write_socket(hdr, algohdr, seqhdr, response)

    def _write_socket(self, hdr, *args):
        alle = []
        for arg in args:
            data = arg.to_binary()
            hdr.add_size(len(data))
            alle.append(data)
        alle.insert(0, hdr.to_binary())
        alle = b"".join(alle)
        self.logger.info("writting %s bytes to socket, with header %s ", len(alle), hdr)
        #self.logger.info("writting data %s", hdr, [i for i in args])
        #self.logger.debug("data: %s", alle)
        self.socket.write(alle)

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

        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:
            if len(self._publishdata_queue) == 0:
                self.logger.warning("Error server wants to send publish answer but no publish request is available")
                return
            requestdata = self._publishdata_queue.pop(0)
        response = ua.PublishResponse()
        response.Parameters = result

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

    def process(self, header, body):
        if header.MessageType == ua.MessageType.Hello:
            hello = ua.Hello.from_binary(body)
            hdr = ua.Header(ua.MessageType.Acknowledge, ua.ChunkType.Single)
            ack = ua.Acknowledge()
            ack.ReceiveBufferSize = hello.ReceiveBufferSize
            ack.SendBufferSize = hello.SendBufferSize
            self._write_socket(hdr, ack)

        elif header.MessageType == ua.MessageType.Error:
            self.logger.warning("Received an error message type")

        elif header.MessageType == ua.MessageType.SecureOpen:
            self.open_secure_channel(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:
            algohdr = ua.SymmetricAlgorithmHeader.from_binary(body)
            seqhdr = ua.SequenceHeader.from_binary(body)
            return self.process_message(algohdr, seqhdr, body)

        else:
            self.logger.warning("Unsupported message type: %s", header.MessageType)
        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)  # 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

            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)

            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.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.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
            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.now()
        self.channel.SecurityToken.RevisedLifetime = params.RequestedLifetime
        self.channel.ServerNonce = utils.create_nonce()
        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 Lock
4	1	from datetime import datetime
5
6	1	from opcua import ua
7	1	from opcua import utils
8
9
10	1	class PublishRequestData(object):
11
12	1	def __init__(self):
13	1	self.requesthdr = None
14	1	self.algohdr = None
15	1	self.seqhdr = None
16
17
18	1	class UAProcessor(object):
19
20	1	def __init__(self, internal_server, socket):
21	1	self.logger = logging.getLogger(__name__)
22	1	self.iserver = internal_server
23	1	self.name = socket.get_extra_info('peername')
24	1	self.sockname = socket.get_extra_info('sockname')
25	1	self.session = None
26	1	self.channel = None
27	1	self.socket = socket
28	1	self._socketlock = Lock()
29	1	self._datalock = Lock()
30	1	self._publishdata_queue = []
31	1	self._seq_number = 1
32
33	1	def send_response(self, requesthandle, algohdr, seqhdr, response, msgtype=ua.MessageType.SecureMessage):
34	1	with self._socketlock:
35	1	response.ResponseHeader.RequestHandle = requesthandle
36	1	seqhdr.SequenceNumber = self._seq_number
37	1	self._seq_number += 1
38	1	hdr = ua.Header(msgtype, ua.ChunkType.Single, self.channel.SecurityToken.ChannelId)
39	1	if isinstance(algohdr, ua.SymmetricAlgorithmHeader):
40	1	algohdr.TokenId = self.channel.SecurityToken.TokenId
41	1	self._write_socket(hdr, algohdr, seqhdr, response)
42
43	1	def _write_socket(self, hdr, *args):
44	1	alle = []
45	1	for arg in args:
46	1	data = arg.to_binary()
47	1	hdr.add_size(len(data))
48	1	alle.append(data)
49	1	alle.insert(0, hdr.to_binary())
50	1	alle = b"".join(alle)
51	1	self.logger.info("writting %s bytes to socket, with header %s ", len(alle), hdr)
52		#self.logger.info("writting data %s", hdr, [i for i in args])
53		#self.logger.debug("data: %s", alle)
54	1	self.socket.write(alle)
55
56	1	def open_secure_channel(self, body):
57	1	algohdr = ua.AsymmetricAlgorithmHeader.from_binary(body)
58	1	seqhdr = ua.SequenceHeader.from_binary(body)
59	1	request = ua.OpenSecureChannelRequest.from_binary(body)
60
61	1	channel = self._open_secure_channel(request.Parameters)
62		# send response
63	1	response = ua.OpenSecureChannelResponse()
64	1	response.Parameters = channel
65	1	self.send_response(request.RequestHeader.RequestHandle, algohdr, seqhdr, response, ua.MessageType.SecureOpen)
66
67	1	def forward_publish_response(self, result):
68	1	self.logger.info("forward publish response %s", result)
69	1	with self._datalock:
70	1	if len(self._publishdata_queue) == 0:
71		self.logger.warning("Error server wants to send publish answer but no publish request is available")
72		return
73	1	requestdata = self._publishdata_queue.pop(0)
74	1	response = ua.PublishResponse()
75	1	response.Parameters = result
76
77	1	self.send_response(requestdata.requesthdr.RequestHandle, requestdata.algohdr, requestdata.seqhdr, response)
78
79	1	def process(self, header, body):
80	1	if header.MessageType == ua.MessageType.Hello:
81	1	hello = ua.Hello.from_binary(body)
82	1	hdr = ua.Header(ua.MessageType.Acknowledge, ua.ChunkType.Single)
83	1	ack = ua.Acknowledge()
84	1	ack.ReceiveBufferSize = hello.ReceiveBufferSize
85	1	ack.SendBufferSize = hello.SendBufferSize
86	1	self._write_socket(hdr, ack)
87
88	1	elif header.MessageType == ua.MessageType.Error:
89		self.logger.warning("Received an error message type")
90
91	1	elif header.MessageType == ua.MessageType.SecureOpen:
92	1	self.open_secure_channel(body)
93
94	1	elif header.MessageType == ua.MessageType.SecureClose:
95	1	if not self.channel or header.ChannelId != self.channel.SecurityToken.ChannelId:
96		self.logger.warning("Request to close channel %s which was not issued, current channel is %s", header.ChannelId, self.channel)
97	1	return False
98
99	1	elif header.MessageType == ua.MessageType.SecureMessage:
100	1	algohdr = ua.SymmetricAlgorithmHeader.from_binary(body)
101	1	seqhdr = ua.SequenceHeader.from_binary(body)
102	1	return self.process_message(algohdr, seqhdr, body)
103
104		else:
105		self.logger.warning("Unsupported message type: %s", header.MessageType)
106	1	return True
107
108	1	def process_message(self, algohdr, seqhdr, body):
109	1	typeid = ua.NodeId.from_binary(body)
110	1	requesthdr = ua.RequestHeader.from_binary(body)
111	1	try:
112	1	return self._process_message(typeid, requesthdr, algohdr, seqhdr, body)
113		except utils.ServiceError as e:
114		status = ua.StatusCode(e.code)
115		response = ua.ServiceFault()
116		response.ResponseHeader.ServiceResult = status
117		self.logger.info("sending service fault response: %s (%s)", status.doc, status.name)
118		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
119		return True
120
121	1	def _process_message(self, typeid, requesthdr, algohdr, seqhdr, body):
122	1	if typeid == ua.NodeId(ua.ObjectIds.CreateSessionRequest_Encoding_DefaultBinary):
123	1	self.logger.info("Create session request")
124	1	params = ua.CreateSessionParameters.from_binary(body)
125
126	1	self.session = self.iserver.create_session(self.name) # create the session on server
127	1	sessiondata = self.session.create_session(params, sockname=self.sockname) # get a session creation result to send back
128
129	1	response = ua.CreateSessionResponse()
130	1	response.Parameters = sessiondata
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	result = self.session.activate_session(params)
154
155	1	response = ua.ActivateSessionResponse()
156	1	response.Parameters = result
157
158	1	self.logger.info("sending read response")
159	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
160
161	1	elif typeid == ua.NodeId(ua.ObjectIds.ReadRequest_Encoding_DefaultBinary):
162	1	self.logger.info("Read request")
163	1	params = ua.ReadParameters.from_binary(body)
164
165	1	results = self.session.read(params)
166
167	1	response = ua.ReadResponse()
168	1	response.Results = results
169
170	1	self.logger.info("sending read response")
171	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
172
173	1	elif typeid == ua.NodeId(ua.ObjectIds.WriteRequest_Encoding_DefaultBinary):
174	1	self.logger.info("Write request")
175	1	params = ua.WriteParameters.from_binary(body)
176
177	1	results = self.session.write(params)
178
179	1	response = ua.WriteResponse()
180	1	response.Results = results
181
182	1	self.logger.info("sending write response")
183	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
184
185	1	elif typeid == ua.NodeId(ua.ObjectIds.BrowseRequest_Encoding_DefaultBinary):
186	1	self.logger.info("Browse request")
187	1	params = ua.BrowseParameters.from_binary(body)
188
189	1	results = self.session.browse(params)
190
191	1	response = ua.BrowseResponse()
192	1	response.Results = results
193
194	1	self.logger.info("sending browse response")
195	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
196
197	1	elif typeid == ua.NodeId(ua.ObjectIds.GetEndpointsRequest_Encoding_DefaultBinary):
198	1	self.logger.info("get endpoints request")
199	1	params = ua.GetEndpointsParameters.from_binary(body)
200
201	1	endpoints = self.iserver.get_endpoints(params, sockname=self.sockname)
202
203	1	response = ua.GetEndpointsResponse()
204	1	response.Endpoints = endpoints
205
206	1	self.logger.info("sending get endpoints response")
207	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
208
209	1	elif typeid == ua.NodeId(ua.ObjectIds.FindServersRequest_Encoding_DefaultBinary):
210	1	self.logger.info("find servers request")
211	1	params = ua.FindServersParameters.from_binary(body)
212
213	1	servers = self.iserver.find_servers(params)
214
215	1	response = ua.FindServersResponse()
216	1	response.Servers = servers
217
218	1	self.logger.info("sending find servers response")
219	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
220
221	1	elif typeid == ua.NodeId(ua.ObjectIds.RegisterServerRequest_Encoding_DefaultBinary):
222	1	self.logger.info("register server request")
223	1	serv = ua.RegisteredServer.from_binary(body)
224
225	1	self.iserver.register_server(serv)
226
227	1	response = ua.RegisterServerResponse()
228
229	1	self.logger.info("sending register server response")
230	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
231
232	1	elif typeid == ua.NodeId(ua.ObjectIds.RegisterServer2Request_Encoding_DefaultBinary):
233		self.logger.info("register server 2 request")
234		params = ua.RegisterServer2Parameters.from_binary(body)
235
236		results = self.iserver.register_server2(params)
237
238		response = ua.RegisterServer2Response()
239		response.ConfigurationResults = results
240
241		self.logger.info("sending register server 2 response")
242		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
243
244	1	elif typeid == ua.NodeId(ua.ObjectIds.TranslateBrowsePathsToNodeIdsRequest_Encoding_DefaultBinary):
245	1	self.logger.info("translate browsepaths to nodeids request")
246	1	params = ua.TranslateBrowsePathsToNodeIdsParameters.from_binary(body)
247
248	1	paths = self.session.translate_browsepaths_to_nodeids(params.BrowsePaths)
249
250	1	response = ua.TranslateBrowsePathsToNodeIdsResponse()
251	1	response.Results = paths
252
253	1	self.logger.info("sending translate browsepaths to nodeids response")
254	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
255
256	1	elif typeid == ua.NodeId(ua.ObjectIds.AddNodesRequest_Encoding_DefaultBinary):
257	1	self.logger.info("add nodes request")
258	1	params = ua.AddNodesParameters.from_binary(body)
259
260	1	results = self.session.add_nodes(params.NodesToAdd)
261
262	1	response = ua.AddNodesResponse()
263	1	response.Results = results
264
265	1	self.logger.info("sending add node response")
266	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
267
268	1	elif typeid == ua.NodeId(ua.ObjectIds.CreateSubscriptionRequest_Encoding_DefaultBinary):
269	1	self.logger.info("create subscription request")
270	1	params = ua.CreateSubscriptionParameters.from_binary(body)
271
272	1	result = self.session.create_subscription(params, self.forward_publish_response)
273
274	1	response = ua.CreateSubscriptionResponse()
275	1	response.Parameters = result
276
277	1	self.logger.info("sending create subscription response")
278	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
279
280	1	elif typeid == ua.NodeId(ua.ObjectIds.DeleteSubscriptionsRequest_Encoding_DefaultBinary):
281	1	self.logger.info("delete subscriptions request")
282	1	params = ua.DeleteSubscriptionsParameters.from_binary(body)
283
284	1	results = self.session.delete_subscriptions(params.SubscriptionIds)
285
286	1	response = ua.DeleteSubscriptionsResponse()
287	1	response.Results = results
288
289	1	self.logger.info("sending delte subscription response")
290	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
291
292	1	elif typeid == ua.NodeId(ua.ObjectIds.CreateMonitoredItemsRequest_Encoding_DefaultBinary):
293	1	self.logger.info("create monitored items request")
294	1	params = ua.CreateMonitoredItemsParameters.from_binary(body)
295	1	results = self.session.create_monitored_items(params)
296
297	1	response = ua.CreateMonitoredItemsResponse()
298	1	response.Results = results
299
300	1	self.logger.info("sending create monitored items response")
301	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
302
303	1	elif typeid == ua.NodeId(ua.ObjectIds.ModifyMonitoredItemsRequest_Encoding_DefaultBinary):
304		self.logger.info("modify monitored items request")
305		params = ua.ModifyMonitoredItemsParameters.from_binary(body)
306		results = self.session.modify_monitored_items(params)
307
308		response = ua.ModifyMonitoredItemsResponse()
309		response.Results = results
310
311		self.logger.info("sending modify monitored items response")
312		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
313
314	1	elif typeid == ua.NodeId(ua.ObjectIds.DeleteMonitoredItemsRequest_Encoding_DefaultBinary):
315	1	self.logger.info("delete monitored items request")
316	1	params = ua.DeleteMonitoredItemsParameters.from_binary(body)
317
318	1	results = self.session.delete_monitored_items(params)
319
320	1	response = ua.DeleteMonitoredItemsResponse()
321	1	response.Results = results
322
323	1	self.logger.info("sending delete monitored items response")
324	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
325
326	1	elif typeid == ua.NodeId(ua.ObjectIds.PublishRequest_Encoding_DefaultBinary):
327	1	self.logger.info("publish request")
328
329	1	if not self.session:
330		return False
331
332	1	params = ua.PublishParameters.from_binary(body)
333
334	1	data = PublishRequestData()
335	1	data.requesthdr = requesthdr
336	1	data.seqhdr = seqhdr
337	1	data.algohdr = algohdr
338	1	with self._datalock:
339	1	self._publishdata_queue.append(data) # will be used to send publish answers from server
340	1	self.session.publish(params.SubscriptionAcknowledgements)
341	1	self.logger.info("publish forward to server")
342
343	1	elif typeid == ua.NodeId(ua.ObjectIds.RepublishRequest_Encoding_DefaultBinary):
344		self.logger.info("re-publish request")
345
346		params = ua.RepublishParameters.from_binary(body)
347		msg = self.session.republish(params)
348
349		response = ua.RepublishResponse()
350		response.NotificationMessage = msg
351
352		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
353
354	1	elif typeid == ua.NodeId(ua.ObjectIds.CloseSecureChannelRequest_Encoding_DefaultBinary):
355		self.logger.info("close secure channel request")
356		response = ua.CloseSecureChannelResponse()
357		self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
358		self.channel = None
359		return False
360
361	1	elif typeid == ua.NodeId(ua.ObjectIds.CallRequest_Encoding_DefaultBinary):
362	1	self.logger.info("call request")
363
364	1	params = ua.CallParameters.from_binary(body)
365
366	1	results = self.session.call(params.MethodsToCall)
367
368	1	response = ua.CallResponse()
369	1	response.Results = results
370
371	1	self.send_response(requesthdr.RequestHandle, algohdr, seqhdr, response)
372
373		else:
374		self.logger.warning("Unknown message received %s", typeid)
375		raise utils.ServiceError(ua.StatusCodes.BadNotImplemented)
376
377	1	return True
378
379	1	def _open_secure_channel(self, params):
380	1	self.logger.info("open secure channel")
381	1	if not self.channel or params.RequestType == ua.SecurityTokenRequestType.Issue:
382	1	self.channel = ua.OpenSecureChannelResult()
383	1	self.channel.SecurityToken.TokenId = 13 # random value
384	1	self.channel.SecurityToken.ChannelId = self.iserver.get_new_channel_id()
385	1	self.channel.SecurityToken.RevisedLifetime = params.RequestedLifetime
386	1	self.channel.SecurityToken.TokenId += 1
387	1	self.channel.SecurityToken.CreatedAt = datetime.now()
388	1	self.channel.SecurityToken.RevisedLifetime = params.RequestedLifetime
389	1	self.channel.ServerNonce = utils.create_nonce()
390	1	return self.channel
391
392	1	def close(self):
393		"""
394		to be called when client has disconnected to ensure we really close
395		everything we should
396		"""
397	1	print("Cleanup client connection: ", self.name)
398	1	if self.session:
399		self.session.close_session(True)
400

FreeOpcUa / python-opcua

Pull Request — master (#70)

opcua.UAProcessor._process_message() F

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