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1
|
|
|
""" |
|
2
|
|
|
High level interface to pure python OPC-UA server |
|
3
|
|
|
""" |
|
4
|
|
|
|
|
5
|
1 |
|
import logging |
|
6
|
1 |
|
from datetime import timedelta, datetime |
|
7
|
1 |
|
try: |
|
8
|
1 |
|
from urllib.parse import urlparse |
|
9
|
|
|
except ImportError: |
|
10
|
|
|
from urlparse import urlparse |
|
11
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|
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|
|
12
|
|
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|
|
13
|
1 |
|
from opcua import ua |
|
14
|
|
|
# from opcua.binary_server import BinaryServer |
|
15
|
1 |
|
from opcua.server.binary_server_asyncio import BinaryServer |
|
16
|
1 |
|
from opcua.server.internal_server import InternalServer |
|
17
|
1 |
|
from opcua.server.event_generator import EventGenerator |
|
18
|
1 |
|
from opcua.common.node import Node |
|
19
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1 |
|
from opcua.common.subscription import Subscription |
|
20
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1 |
|
from opcua.common.manage_nodes import delete_nodes |
|
21
|
1 |
|
from opcua.client.client import Client |
|
22
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1 |
|
from opcua.crypto import security_policies |
|
23
|
1 |
|
from opcua.common.event_objects import BaseEvent |
|
24
|
1 |
|
from opcua.common.shortcuts import Shortcuts |
|
25
|
1 |
|
from opcua.common.structures import load_type_definitions |
|
26
|
1 |
|
from opcua.common.xmlexporter import XmlExporter |
|
27
|
1 |
|
from opcua.common.xmlimporter import XmlImporter |
|
28
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1 |
|
from opcua.common.ua_utils import get_nodes_of_namespace |
|
29
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1 |
|
use_crypto = True |
|
30
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1 |
|
try: |
|
31
|
1 |
|
from opcua.crypto import uacrypto |
|
32
|
|
|
except ImportError: |
|
33
|
|
|
logging.getLogger(__name__).warning("cryptography is not installed, use of crypto disabled") |
|
34
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|
|
use_crypto = False |
|
35
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|
|
36
|
|
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|
|
37
|
1 |
|
class Server(object): |
|
38
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|
|
|
|
39
|
|
|
""" |
|
40
|
|
|
High level Server class |
|
41
|
|
|
|
|
42
|
|
|
This class creates an opcua server with default values |
|
43
|
|
|
|
|
44
|
|
|
Create your own namespace and then populate your server address space |
|
45
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|
|
using use the get_root() or get_objects() to get Node objects. |
|
46
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|
|
and get_event_object() to fire events. |
|
47
|
|
|
Then start server. See example_server.py |
|
48
|
|
|
All methods are threadsafe |
|
49
|
|
|
|
|
50
|
|
|
If you need more flexibility you call directly the Ua Service methods |
|
51
|
|
|
on the iserver or iserver.isession object members. |
|
52
|
|
|
|
|
53
|
|
|
During startup the standard address space will be constructed, which may be |
|
54
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|
|
time-consuming when running a server on a less powerful device (e.g. a |
|
55
|
|
|
Raspberry Pi). In order to improve startup performance, a optional path to a |
|
56
|
|
|
cache file can be passed to the server constructor. |
|
57
|
|
|
If the parameter is defined, the address space will be loaded from the |
|
58
|
|
|
cache file or the file will be created if it does not exist yet. |
|
59
|
|
|
As a result the first startup will be even slower due to the cache file |
|
60
|
|
|
generation but all further start ups will be significantly faster. |
|
61
|
|
|
|
|
62
|
|
|
:ivar product_uri: |
|
63
|
|
|
:vartype product_uri: uri |
|
64
|
|
|
:ivar name: |
|
65
|
|
|
:vartype name: string |
|
66
|
|
|
:ivar default_timeout: timeout in milliseconds for sessions and secure channel |
|
67
|
|
|
:vartype default_timeout: int |
|
68
|
|
|
:ivar iserver: internal server object |
|
69
|
|
|
:vartype default_timeout: InternalServer |
|
70
|
|
|
:ivar bserver: binary protocol server |
|
71
|
|
|
:vartype bserver: BinaryServer |
|
72
|
|
|
:ivar nodes: shortcuts to common nodes |
|
73
|
|
|
:vartype nodes: Shortcuts |
|
74
|
|
|
|
|
75
|
|
|
""" |
|
76
|
|
|
|
|
77
|
1 |
|
def __init__(self, shelffile=None, iserver=None): |
|
78
|
1 |
|
self.logger = logging.getLogger(__name__) |
|
79
|
1 |
|
self.endpoint = urlparse("opc.tcp://0.0.0.0:4840/freeopcua/server/") |
|
80
|
1 |
|
self._application_uri = "urn:freeopcua:python:server" |
|
81
|
1 |
|
self.product_uri = "urn:freeopcua.github.io:python:server" |
|
82
|
1 |
|
self.name = "FreeOpcUa Python Server" |
|
83
|
1 |
|
self.manufacturer_name = "FreeOpcUa" |
|
84
|
1 |
|
self.application_type = ua.ApplicationType.ClientAndServer |
|
85
|
1 |
|
self.default_timeout = 3600000 |
|
86
|
1 |
|
if iserver is not None: |
|
87
|
|
|
self.iserver = iserver |
|
88
|
|
|
else: |
|
89
|
1 |
|
self.iserver = InternalServer(shelffile) |
|
90
|
1 |
|
self.bserver = None |
|
91
|
1 |
|
self._discovery_clients = {} |
|
92
|
1 |
|
self._discovery_period = 60 |
|
93
|
1 |
|
self.certificate = None |
|
94
|
1 |
|
self.private_key = None |
|
95
|
1 |
|
self._policies = [] |
|
96
|
1 |
|
self.nodes = Shortcuts(self.iserver.isession) |
|
97
|
|
|
|
|
98
|
|
|
# setup some expected values |
|
99
|
1 |
|
self.set_application_uri(self._application_uri) |
|
100
|
1 |
|
sa_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_ServerArray)) |
|
101
|
1 |
|
sa_node.set_value([self._application_uri]) |
|
102
|
1 |
|
status_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_ServerStatus)) |
|
103
|
1 |
|
build_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_ServerStatus_BuildInfo)) |
|
104
|
1 |
|
status = ua.ServerStatusDataType() |
|
105
|
1 |
|
status.BuildInfo.ProductUri = self.product_uri |
|
106
|
1 |
|
status.BuildInfo.ManufacturerName = self.manufacturer_name |
|
107
|
1 |
|
status.BuildInfo.ProductName = self.name |
|
108
|
1 |
|
status.BuildInfo.SoftwareVersion = "1.0pre" |
|
109
|
1 |
|
status.BuildInfo.BuildNumber = "0" |
|
110
|
1 |
|
status.BuildInfo.BuildDate = datetime.now() |
|
111
|
1 |
|
status.SecondsTillShutdown = 0 |
|
112
|
1 |
|
status_node.set_value(status) |
|
113
|
1 |
|
build_node.set_value(status.BuildInfo) |
|
114
|
|
|
|
|
115
|
|
|
|
|
116
|
|
|
# enable all endpoints by default |
|
117
|
1 |
|
self._security_policy = [ |
|
118
|
|
|
ua.SecurityPolicyType.NoSecurity, |
|
119
|
|
|
ua.SecurityPolicyType.Basic128Rsa15_SignAndEncrypt, |
|
120
|
|
|
ua.SecurityPolicyType.Basic128Rsa15_Sign, |
|
121
|
|
|
ua.SecurityPolicyType.Basic256_SignAndEncrypt, |
|
122
|
|
|
ua.SecurityPolicyType.Basic256_Sign |
|
123
|
|
|
] |
|
124
|
1 |
|
self._policyIDs = ["Anonymous", "Basic256", "Basic128", "Username"] |
|
125
|
|
|
|
|
126
|
1 |
|
def __enter__(self): |
|
127
|
1 |
|
self.start() |
|
128
|
1 |
|
return self |
|
129
|
|
|
|
|
130
|
1 |
|
def __exit__(self, exc_type, exc_value, traceback): |
|
131
|
1 |
|
self.stop() |
|
132
|
|
|
|
|
133
|
1 |
|
def load_certificate(self, path): |
|
134
|
|
|
""" |
|
135
|
|
|
load server certificate from file, either pem or der |
|
136
|
|
|
""" |
|
137
|
1 |
|
self.certificate = uacrypto.load_certificate(path) |
|
138
|
|
|
|
|
139
|
1 |
|
def load_private_key(self, path): |
|
140
|
1 |
|
self.private_key = uacrypto.load_private_key(path) |
|
141
|
|
|
|
|
142
|
1 |
|
def disable_clock(self, val=True): |
|
143
|
|
|
""" |
|
144
|
|
|
for debugging you may want to disable clock that write every second |
|
145
|
|
|
to address space |
|
146
|
|
|
""" |
|
147
|
|
|
self.iserver.disabled_clock = val |
|
148
|
|
|
|
|
149
|
1 |
|
def set_application_uri(self, uri): |
|
150
|
|
|
""" |
|
151
|
|
|
Set application/server URI. |
|
152
|
|
|
This uri is supposed to be unique. If you intent to register |
|
153
|
|
|
your server to a discovery server, it really should be unique in |
|
154
|
|
|
your system! |
|
155
|
|
|
default is : "urn:freeopcua:python:server" |
|
156
|
|
|
""" |
|
157
|
1 |
|
self._application_uri = uri |
|
158
|
1 |
|
ns_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_NamespaceArray)) |
|
159
|
1 |
|
uries = ns_node.get_value() |
|
160
|
1 |
|
if len(uries) > 1: |
|
161
|
1 |
|
uries[1] = uri # application uri is always namespace 1 |
|
162
|
|
|
else: |
|
163
|
1 |
|
uries.append(uri) |
|
164
|
1 |
|
ns_node.set_value(uries) |
|
165
|
|
|
|
|
166
|
1 |
|
def find_servers(self, uris=None): |
|
167
|
|
|
""" |
|
168
|
|
|
find_servers. mainly implemented for symmetry with client |
|
169
|
|
|
""" |
|
170
|
1 |
|
if uris is None: |
|
171
|
1 |
|
uris = [] |
|
172
|
1 |
|
params = ua.FindServersParameters() |
|
173
|
1 |
|
params.EndpointUrl = self.endpoint.geturl() |
|
174
|
1 |
|
params.ServerUris = uris |
|
175
|
1 |
|
return self.iserver.find_servers(params) |
|
176
|
|
|
|
|
177
|
1 |
|
def register_to_discovery(self, url="opc.tcp://localhost:4840", period=60): |
|
178
|
|
|
""" |
|
179
|
|
|
Register to an OPC-UA Discovery server. Registering must be renewed at |
|
180
|
|
|
least every 10 minutes, so this method will use our asyncio thread to |
|
181
|
|
|
re-register every period seconds |
|
182
|
|
|
if period is 0 registration is not automatically renewed |
|
183
|
|
|
""" |
|
184
|
|
|
# FIXME: have a period per discovery |
|
185
|
1 |
|
if url in self._discovery_clients: |
|
186
|
1 |
|
self._discovery_clients[url].disconnect() |
|
187
|
1 |
|
self._discovery_clients[url] = Client(url) |
|
188
|
1 |
|
self._discovery_clients[url].connect() |
|
189
|
1 |
|
self._discovery_clients[url].register_server(self) |
|
190
|
1 |
|
self._discovery_period = period |
|
191
|
1 |
|
if period: |
|
192
|
|
|
self.iserver.loop.call_soon(self._renew_registration) |
|
193
|
|
|
|
|
194
|
1 |
|
def unregister_to_discovery(self, url="opc.tcp://localhost:4840"): |
|
195
|
|
|
""" |
|
196
|
|
|
stop registration thread |
|
197
|
|
|
""" |
|
198
|
|
|
# FIXME: is there really no way to deregister? |
|
199
|
|
|
self._discovery_clients[url].disconnect() |
|
200
|
|
|
|
|
201
|
1 |
|
def _renew_registration(self): |
|
202
|
|
|
for client in self._discovery_clients.values(): |
|
203
|
|
|
client.register_server(self) |
|
204
|
|
|
self.iserver.loop.call_later(self._discovery_period, self._renew_registration) |
|
205
|
|
|
|
|
206
|
1 |
|
def get_client_to_discovery(self, url="opc.tcp://localhost:4840"): |
|
207
|
|
|
""" |
|
208
|
|
|
Create a client to discovery server and return it |
|
209
|
|
|
""" |
|
210
|
|
|
client = Client(url) |
|
211
|
|
|
client.connect() |
|
212
|
|
|
return client |
|
213
|
|
|
|
|
214
|
1 |
|
def allow_remote_admin(self, allow): |
|
215
|
|
|
""" |
|
216
|
|
|
Enable or disable the builtin Admin user from network clients |
|
217
|
|
|
""" |
|
218
|
|
|
self.iserver.allow_remote_admin = allow |
|
219
|
|
|
|
|
220
|
1 |
|
def set_endpoint(self, url): |
|
221
|
1 |
|
self.endpoint = urlparse(url) |
|
222
|
|
|
|
|
223
|
1 |
|
def get_endpoints(self): |
|
224
|
1 |
|
return self.iserver.get_endpoints() |
|
225
|
|
|
|
|
226
|
1 |
|
def set_security_policy(self, security_policy): |
|
227
|
|
|
""" |
|
228
|
|
|
Method setting up the security policies for connections |
|
229
|
|
|
to the server, where security_policy is a list of integers. |
|
230
|
|
|
During server initialization, all endpoints are enabled: |
|
231
|
|
|
|
|
232
|
|
|
security_policy = [ |
|
233
|
|
|
ua.SecurityPolicyType.NoSecurity, |
|
234
|
|
|
ua.SecurityPolicyType.Basic128Rsa15_SignAndEncrypt, |
|
235
|
|
|
ua.SecurityPolicyType.Basic128Rsa15_Sign, |
|
236
|
|
|
ua.SecurityPolicyType.Basic256_SignAndEncrypt, |
|
237
|
|
|
ua.SecurityPolicyType.Basic256_Sign |
|
238
|
|
|
] |
|
239
|
|
|
|
|
240
|
|
|
E.g. to limit the number of endpoints and disable no encryption: |
|
241
|
|
|
|
|
242
|
|
|
set_security_policy([ |
|
243
|
|
|
ua.SecurityPolicyType.Basic128Rsa15_SignAndEncrypt |
|
244
|
|
|
ua.SecurityPolicyType.Basic256_SignAndEncrypt]) |
|
245
|
|
|
|
|
246
|
|
|
""" |
|
247
|
|
|
self._security_policy = security_policy |
|
248
|
|
|
|
|
249
|
1 |
|
def set_security_IDs(self, policyIDs): |
|
250
|
|
|
""" |
|
251
|
|
|
Method setting up the security endpoints for identification |
|
252
|
|
|
of clients. During server object initialization, all possible |
|
253
|
|
|
endpoints are enabled: |
|
254
|
|
|
|
|
255
|
|
|
self._policyIDs = ["Anonymous", "Basic256", "Basic128", "Username"] |
|
256
|
|
|
|
|
257
|
|
|
E.g. to limit the number of IDs and disable anonymous clients: |
|
258
|
|
|
|
|
259
|
|
|
set_security_policy(["Basic256"]) |
|
260
|
|
|
|
|
261
|
|
|
(Implementation for ID check is currently not finalized...) |
|
262
|
|
|
|
|
263
|
|
|
""" |
|
264
|
|
|
self._policyIDs = policyIDs |
|
265
|
|
|
|
|
266
|
1 |
|
def _setup_server_nodes(self): |
|
267
|
|
|
# to be called just before starting server since it needs all parameters to be setup |
|
268
|
1 |
|
if ua.SecurityPolicyType.NoSecurity in self._security_policy: |
|
269
|
1 |
|
self._set_endpoints() |
|
270
|
1 |
|
self._policies = [ua.SecurityPolicyFactory()] |
|
271
|
|
|
|
|
272
|
1 |
|
if self._security_policy != [ua.SecurityPolicyType.NoSecurity]: |
|
273
|
1 |
|
if not (self.certificate and self.private_key): |
|
274
|
1 |
|
self.logger.warning("Endpoints other than open requested but private key and certificate are not set.") |
|
275
|
1 |
|
return |
|
276
|
|
|
|
|
277
|
1 |
|
if ua.SecurityPolicyType.NoSecurity in self._security_policy: |
|
278
|
1 |
|
self.logger.warning("Creating an open endpoint to the server, although encrypted endpoints are enabled.") |
|
279
|
|
|
|
|
280
|
1 |
|
if ua.SecurityPolicyType.Basic128Rsa15_SignAndEncrypt in self._security_policy: |
|
281
|
1 |
|
self._set_endpoints(security_policies.SecurityPolicyBasic128Rsa15, |
|
282
|
|
|
ua.MessageSecurityMode.SignAndEncrypt) |
|
283
|
1 |
|
self._policies.append(ua.SecurityPolicyFactory(security_policies.SecurityPolicyBasic128Rsa15, |
|
284
|
|
|
ua.MessageSecurityMode.SignAndEncrypt, |
|
285
|
|
|
self.certificate, |
|
286
|
|
|
self.private_key) |
|
287
|
|
|
) |
|
288
|
1 |
|
if ua.SecurityPolicyType.Basic128Rsa15_Sign in self._security_policy: |
|
289
|
1 |
|
self._set_endpoints(security_policies.SecurityPolicyBasic128Rsa15, |
|
290
|
|
|
ua.MessageSecurityMode.Sign) |
|
291
|
1 |
|
self._policies.append(ua.SecurityPolicyFactory(security_policies.SecurityPolicyBasic128Rsa15, |
|
292
|
|
|
ua.MessageSecurityMode.Sign, |
|
293
|
|
|
self.certificate, |
|
294
|
|
|
self.private_key) |
|
295
|
|
|
) |
|
296
|
1 |
|
if ua.SecurityPolicyType.Basic256_SignAndEncrypt in self._security_policy: |
|
297
|
1 |
|
self._set_endpoints(security_policies.SecurityPolicyBasic256, |
|
298
|
|
|
ua.MessageSecurityMode.SignAndEncrypt) |
|
299
|
1 |
|
self._policies.append(ua.SecurityPolicyFactory(security_policies.SecurityPolicyBasic256, |
|
300
|
|
|
ua.MessageSecurityMode.SignAndEncrypt, |
|
301
|
|
|
self.certificate, |
|
302
|
|
|
self.private_key) |
|
303
|
|
|
) |
|
304
|
1 |
|
if ua.SecurityPolicyType.Basic256_Sign in self._security_policy: |
|
305
|
1 |
|
self._set_endpoints(security_policies.SecurityPolicyBasic256, |
|
306
|
|
|
ua.MessageSecurityMode.Sign) |
|
307
|
1 |
|
self._policies.append(ua.SecurityPolicyFactory(security_policies.SecurityPolicyBasic256, |
|
308
|
|
|
ua.MessageSecurityMode.Sign, |
|
309
|
|
|
self.certificate, |
|
310
|
|
|
self.private_key) |
|
311
|
|
|
) |
|
312
|
|
|
|
|
313
|
1 |
|
def _set_endpoints(self, policy=ua.SecurityPolicy, mode=ua.MessageSecurityMode.None_): |
|
314
|
1 |
|
idtokens = [] |
|
315
|
1 |
|
if "Anonymous" in self._policyIDs: |
|
316
|
1 |
|
idtoken = ua.UserTokenPolicy() |
|
317
|
1 |
|
idtoken.PolicyId = 'anonymous' |
|
318
|
1 |
|
idtoken.TokenType = ua.UserTokenType.Anonymous |
|
319
|
1 |
|
idtokens.append(idtoken) |
|
320
|
|
|
|
|
321
|
1 |
|
if "Basic256" in self._policyIDs: |
|
322
|
1 |
|
idtoken = ua.UserTokenPolicy() |
|
323
|
1 |
|
idtoken.PolicyId = 'certificate_basic256' |
|
324
|
1 |
|
idtoken.TokenType = ua.UserTokenType.Certificate |
|
325
|
1 |
|
idtokens.append(idtoken) |
|
326
|
|
|
|
|
327
|
1 |
|
if "Basic128" in self._policyIDs: |
|
328
|
1 |
|
idtoken = ua.UserTokenPolicy() |
|
329
|
1 |
|
idtoken.PolicyId = 'certificate_basic128' |
|
330
|
1 |
|
idtoken.TokenType = ua.UserTokenType.Certificate |
|
331
|
1 |
|
idtokens.append(idtoken) |
|
332
|
|
|
|
|
333
|
1 |
|
if "Username" in self._policyIDs: |
|
334
|
1 |
|
idtoken = ua.UserTokenPolicy() |
|
335
|
1 |
|
idtoken.PolicyId = 'username' |
|
336
|
1 |
|
idtoken.TokenType = ua.UserTokenType.UserName |
|
337
|
1 |
|
idtokens.append(idtoken) |
|
338
|
|
|
|
|
339
|
1 |
|
appdesc = ua.ApplicationDescription() |
|
340
|
1 |
|
appdesc.ApplicationName = ua.LocalizedText(self.name) |
|
341
|
1 |
|
appdesc.ApplicationUri = self._application_uri |
|
342
|
1 |
|
appdesc.ApplicationType = self.application_type |
|
343
|
1 |
|
appdesc.ProductUri = self.product_uri |
|
344
|
1 |
|
appdesc.DiscoveryUrls.append(self.endpoint.geturl()) |
|
345
|
|
|
|
|
346
|
1 |
|
edp = ua.EndpointDescription() |
|
347
|
1 |
|
edp.EndpointUrl = self.endpoint.geturl() |
|
348
|
1 |
|
edp.Server = appdesc |
|
349
|
1 |
|
if self.certificate: |
|
350
|
1 |
|
edp.ServerCertificate = uacrypto.der_from_x509(self.certificate) |
|
351
|
1 |
|
edp.SecurityMode = mode |
|
352
|
1 |
|
edp.SecurityPolicyUri = policy.URI |
|
353
|
1 |
|
edp.UserIdentityTokens = idtokens |
|
354
|
1 |
|
edp.TransportProfileUri = 'http://opcfoundation.org/UA-Profile/Transport/uatcp-uasc-uabinary' |
|
355
|
1 |
|
edp.SecurityLevel = 0 |
|
356
|
1 |
|
self.iserver.add_endpoint(edp) |
|
357
|
|
|
|
|
358
|
1 |
|
def set_server_name(self, name): |
|
359
|
|
|
self.name = name |
|
360
|
|
|
|
|
361
|
1 |
|
def start(self): |
|
362
|
|
|
""" |
|
363
|
|
|
Start to listen on network |
|
364
|
|
|
""" |
|
365
|
1 |
|
self._setup_server_nodes() |
|
366
|
1 |
|
self.iserver.start() |
|
367
|
1 |
|
try: |
|
368
|
1 |
|
self.bserver = BinaryServer(self.iserver, self.endpoint.hostname, self.endpoint.port) |
|
369
|
1 |
|
self.bserver.set_policies(self._policies) |
|
370
|
1 |
|
self.bserver.start() |
|
371
|
1 |
|
except Exception as exp: |
|
372
|
1 |
|
self.iserver.stop() |
|
373
|
1 |
|
raise exp |
|
374
|
|
|
|
|
375
|
1 |
|
def stop(self): |
|
376
|
|
|
""" |
|
377
|
|
|
Stop server |
|
378
|
|
|
""" |
|
379
|
1 |
|
for client in self._discovery_clients.values(): |
|
380
|
1 |
|
client.disconnect() |
|
381
|
1 |
|
self.bserver.stop() |
|
382
|
1 |
|
self.iserver.stop() |
|
383
|
|
|
|
|
384
|
1 |
|
def get_root_node(self): |
|
385
|
|
|
""" |
|
386
|
|
|
Get Root node of server. Returns a Node object. |
|
387
|
|
|
""" |
|
388
|
1 |
|
return self.get_node(ua.TwoByteNodeId(ua.ObjectIds.RootFolder)) |
|
389
|
|
|
|
|
390
|
1 |
|
def get_objects_node(self): |
|
391
|
|
|
""" |
|
392
|
|
|
Get Objects node of server. Returns a Node object. |
|
393
|
|
|
""" |
|
394
|
1 |
|
return self.get_node(ua.TwoByteNodeId(ua.ObjectIds.ObjectsFolder)) |
|
395
|
|
|
|
|
396
|
1 |
|
def get_server_node(self): |
|
397
|
|
|
""" |
|
398
|
|
|
Get Server node of server. Returns a Node object. |
|
399
|
|
|
""" |
|
400
|
1 |
|
return self.get_node(ua.TwoByteNodeId(ua.ObjectIds.Server)) |
|
401
|
|
|
|
|
402
|
1 |
|
def get_node(self, nodeid): |
|
403
|
|
|
""" |
|
404
|
|
|
Get a specific node using NodeId object or a string representing a NodeId |
|
405
|
|
|
""" |
|
406
|
1 |
|
return Node(self.iserver.isession, nodeid) |
|
407
|
|
|
|
|
408
|
1 |
|
def create_subscription(self, period, handler): |
|
409
|
|
|
""" |
|
410
|
|
|
Create a subscription. |
|
411
|
|
|
returns a Subscription object which allow |
|
412
|
|
|
to subscribe to events or data on server |
|
413
|
|
|
period is in milliseconds |
|
414
|
|
|
handler is a python object with following methods: |
|
415
|
|
|
def datachange_notification(self, node, val, data): |
|
416
|
|
|
def event_notification(self, event): |
|
417
|
|
|
def status_change_notification(self, status): |
|
418
|
|
|
""" |
|
419
|
1 |
|
params = ua.CreateSubscriptionParameters() |
|
420
|
1 |
|
params.RequestedPublishingInterval = period |
|
421
|
1 |
|
params.RequestedLifetimeCount = 3000 |
|
422
|
1 |
|
params.RequestedMaxKeepAliveCount = 10000 |
|
423
|
1 |
|
params.MaxNotificationsPerPublish = 0 |
|
424
|
1 |
|
params.PublishingEnabled = True |
|
425
|
1 |
|
params.Priority = 0 |
|
426
|
1 |
|
return Subscription(self.iserver.isession, params, handler) |
|
427
|
|
|
|
|
428
|
1 |
|
def get_namespace_array(self): |
|
429
|
|
|
""" |
|
430
|
|
|
get all namespace defined in server |
|
431
|
|
|
""" |
|
432
|
1 |
|
ns_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_NamespaceArray)) |
|
433
|
1 |
|
return ns_node.get_value() |
|
434
|
|
|
|
|
435
|
1 |
|
def register_namespace(self, uri): |
|
436
|
|
|
""" |
|
437
|
|
|
Register a new namespace. Nodes should in custom namespace, not 0. |
|
438
|
|
|
""" |
|
439
|
1 |
|
ns_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_NamespaceArray)) |
|
440
|
1 |
|
uries = ns_node.get_value() |
|
441
|
1 |
|
if uri in uries: |
|
442
|
1 |
|
return uries.index(uri) |
|
443
|
1 |
|
uries.append(uri) |
|
444
|
1 |
|
ns_node.set_value(uries) |
|
445
|
1 |
|
return len(uries) - 1 |
|
446
|
|
|
|
|
447
|
1 |
|
def get_namespace_index(self, uri): |
|
448
|
|
|
""" |
|
449
|
|
|
get index of a namespace using its uri |
|
450
|
|
|
""" |
|
451
|
1 |
|
uries = self.get_namespace_array() |
|
452
|
1 |
|
return uries.index(uri) |
|
453
|
|
|
|
|
454
|
1 |
|
def get_event_generator(self, etype=None, source=ua.ObjectIds.Server): |
|
455
|
|
|
""" |
|
456
|
|
|
Returns an event object using an event type from address space. |
|
457
|
|
|
Use this object to fire events |
|
458
|
|
|
""" |
|
459
|
1 |
|
if not etype: |
|
460
|
1 |
|
etype = BaseEvent() |
|
461
|
1 |
|
return EventGenerator(self.iserver.isession, etype, source) |
|
462
|
|
|
|
|
463
|
1 |
|
def create_custom_data_type(self, idx, name, basetype=ua.ObjectIds.BaseDataType, properties=None): |
|
464
|
1 |
|
if properties is None: |
|
465
|
|
|
properties = [] |
|
466
|
1 |
|
return self._create_custom_type(idx, name, basetype, properties, [], []) |
|
467
|
|
|
|
|
468
|
1 |
|
def create_custom_event_type(self, idx, name, basetype=ua.ObjectIds.BaseEventType, properties=None): |
|
469
|
1 |
|
if properties is None: |
|
470
|
|
|
properties = [] |
|
471
|
1 |
|
return self._create_custom_type(idx, name, basetype, properties, [], []) |
|
472
|
|
|
|
|
473
|
1 |
|
def create_custom_object_type(self, idx, name, basetype=ua.ObjectIds.BaseObjectType, properties=None, variables=None, methods=None): |
|
474
|
1 |
|
if properties is None: |
|
475
|
|
|
properties = [] |
|
476
|
1 |
|
if variables is None: |
|
477
|
|
|
variables = [] |
|
478
|
1 |
|
if methods is None: |
|
479
|
|
|
methods = [] |
|
480
|
1 |
|
return self._create_custom_type(idx, name, basetype, properties, variables, methods) |
|
481
|
|
|
|
|
482
|
|
|
# def create_custom_reference_type(self, idx, name, basetype=ua.ObjectIds.BaseReferenceType, properties=[]): |
|
483
|
|
|
# return self._create_custom_type(idx, name, basetype, properties) |
|
484
|
|
|
|
|
485
|
1 |
|
def create_custom_variable_type(self, idx, name, basetype=ua.ObjectIds.BaseVariableType, properties=None, variables=None, methods=None): |
|
486
|
1 |
|
if properties is None: |
|
487
|
|
|
properties = [] |
|
488
|
1 |
|
if variables is None: |
|
489
|
1 |
|
variables = [] |
|
490
|
1 |
|
if methods is None: |
|
491
|
1 |
|
methods = [] |
|
492
|
1 |
|
return self._create_custom_type(idx, name, basetype, properties, variables, methods) |
|
493
|
|
|
|
|
494
|
1 |
|
def _create_custom_type(self, idx, name, basetype, properties, variables, methods): |
|
495
|
1 |
|
if isinstance(basetype, Node): |
|
496
|
1 |
|
base_t = basetype |
|
497
|
1 |
|
elif isinstance(basetype, ua.NodeId): |
|
498
|
1 |
|
base_t = Node(self.iserver.isession, basetype) |
|
499
|
|
|
else: |
|
500
|
1 |
|
base_t = Node(self.iserver.isession, ua.NodeId(basetype)) |
|
501
|
|
|
|
|
502
|
1 |
|
custom_t = base_t.add_object_type(idx, name) |
|
503
|
1 |
|
for prop in properties: |
|
504
|
1 |
|
datatype = None |
|
505
|
1 |
|
if len(prop) > 2: |
|
506
|
|
|
datatype = prop[2] |
|
507
|
1 |
|
custom_t.add_property(idx, prop[0], ua.get_default_value(prop[1]), varianttype=prop[1], datatype=datatype) |
|
508
|
1 |
|
for variable in variables: |
|
509
|
1 |
|
datatype = None |
|
510
|
1 |
|
if len(variable) > 2: |
|
511
|
1 |
|
datatype = variable[2] |
|
512
|
1 |
|
custom_t.add_variable(idx, variable[0], ua.get_default_value(variable[1]), varianttype=variable[1], datatype=datatype) |
|
513
|
1 |
|
for method in methods: |
|
514
|
1 |
|
custom_t.add_method(idx, method[0], method[1], method[2], method[3]) |
|
515
|
|
|
|
|
516
|
1 |
|
return custom_t |
|
517
|
|
|
|
|
518
|
1 |
|
def import_xml(self, path=None, xmlstring=None): |
|
519
|
|
|
""" |
|
520
|
|
|
Import nodes defined in xml |
|
521
|
|
|
""" |
|
522
|
1 |
|
importer = XmlImporter(self) |
|
523
|
1 |
|
return importer.import_xml(path, xmlstring) |
|
524
|
|
|
|
|
525
|
1 |
|
def export_xml(self, nodes, path): |
|
526
|
|
|
""" |
|
527
|
|
|
Export defined nodes to xml |
|
528
|
|
|
""" |
|
529
|
1 |
|
exp = XmlExporter(self) |
|
530
|
1 |
|
exp.build_etree(nodes) |
|
531
|
1 |
|
return exp.write_xml(path) |
|
532
|
|
|
|
|
533
|
1 |
|
def export_xml_by_ns(self, path, namespaces=None): |
|
534
|
|
|
""" |
|
535
|
|
|
Export nodes of one or more namespaces to an XML file. |
|
536
|
|
|
Namespaces used by nodes are always exported for consistency. |
|
537
|
|
|
Args: |
|
538
|
|
|
server: opc ua server to use |
|
539
|
|
|
path: name of the xml file to write |
|
540
|
|
|
namespaces: list of string uris or int indexes of the namespace to export, if not provide all ns are used except 0 |
|
541
|
|
|
|
|
542
|
|
|
Returns: |
|
543
|
|
|
""" |
|
544
|
|
|
if namespaces is None: |
|
545
|
|
|
namespaces = [] |
|
546
|
|
|
nodes = get_nodes_of_namespace(self, namespaces) |
|
547
|
|
|
self.export_xml(nodes, path) |
|
548
|
|
|
|
|
549
|
1 |
|
def delete_nodes(self, nodes, recursive=False): |
|
550
|
1 |
|
return delete_nodes(self.iserver.isession, nodes, recursive) |
|
551
|
|
|
|
|
552
|
1 |
|
def historize_node_data_change(self, node, period=timedelta(days=7), count=0): |
|
553
|
|
|
""" |
|
554
|
|
|
Start historizing supplied nodes; see history module |
|
555
|
|
|
Args: |
|
556
|
|
|
node: node or list of nodes that can be historized (variables/properties) |
|
557
|
|
|
period: time delta to store the history; older data will be deleted from the storage |
|
558
|
|
|
count: number of changes to store in the history |
|
559
|
|
|
|
|
560
|
|
|
Returns: |
|
561
|
|
|
""" |
|
562
|
1 |
|
nodes = node if isinstance(node, (list, tuple)) else [node] |
|
563
|
1 |
|
for node in nodes: |
|
564
|
1 |
|
self.iserver.enable_history_data_change(node, period, count) |
|
565
|
|
|
|
|
566
|
1 |
|
def dehistorize_node_data_change(self, node): |
|
567
|
|
|
""" |
|
568
|
|
|
Stop historizing supplied nodes; see history module |
|
569
|
|
|
Args: |
|
570
|
|
|
node: node or list of nodes that can be historized (UA variables/properties) |
|
571
|
|
|
|
|
572
|
|
|
Returns: |
|
573
|
|
|
""" |
|
574
|
|
|
nodes = node if isinstance(node, (list, tuple)) else [node] |
|
575
|
|
|
for node in nodes: |
|
576
|
|
|
self.iserver.disable_history_data_change(node) |
|
577
|
|
|
|
|
578
|
1 |
|
def historize_node_event(self, node, period=timedelta(days=7), count=0): |
|
579
|
|
|
""" |
|
580
|
|
|
Start historizing events from node (typically a UA object); see history module |
|
581
|
|
|
Args: |
|
582
|
|
|
node: node or list of nodes that can be historized (UA objects) |
|
583
|
|
|
period: time delta to store the history; older data will be deleted from the storage |
|
584
|
|
|
count: number of events to store in the history |
|
585
|
|
|
|
|
586
|
|
|
Returns: |
|
587
|
|
|
""" |
|
588
|
1 |
|
nodes = node if isinstance(node, (list, tuple)) else [node] |
|
589
|
1 |
|
for node in nodes: |
|
590
|
1 |
|
self.iserver.enable_history_event(node, period, count) |
|
591
|
|
|
|
|
592
|
1 |
|
def dehistorize_node_event(self, node): |
|
593
|
|
|
""" |
|
594
|
|
|
Stop historizing events from node (typically a UA object); see history module |
|
595
|
|
|
Args: |
|
596
|
|
|
node: node or list of nodes that can be historized (UA objects) |
|
597
|
|
|
|
|
598
|
|
|
Returns: |
|
599
|
|
|
""" |
|
600
|
|
|
nodes = node if isinstance(node, (list, tuple)) else [node] |
|
601
|
|
|
for node in nodes: |
|
602
|
|
|
self.iserver.disable_history_event(node) |
|
603
|
|
|
|
|
604
|
1 |
|
def subscribe_server_callback(self, event, handle): |
|
605
|
|
|
self.iserver.subscribe_server_callback(event, handle) |
|
606
|
|
|
|
|
607
|
1 |
|
def unsubscribe_server_callback(self, event, handle): |
|
608
|
|
|
self.iserver.unsubscribe_server_callback(event, handle) |
|
609
|
|
|
|
|
610
|
1 |
|
def link_method(self, node, callback): |
|
611
|
|
|
""" |
|
612
|
|
|
Link a python function to a UA method in the address space; required when a UA method has been imported |
|
613
|
|
|
to the address space via XML; the python executable must be linked manually |
|
614
|
|
|
Args: |
|
615
|
|
|
node: UA method node |
|
616
|
|
|
callback: python function that the UA method will call |
|
617
|
|
|
|
|
618
|
|
|
Returns: |
|
619
|
|
|
""" |
|
620
|
|
|
self.iserver.isession.add_method_callback(node.nodeid, callback) |
|
621
|
|
|
|
|
622
|
1 |
|
def load_type_definitions(self, nodes=None): |
|
623
|
|
|
return load_type_definitions(self, nodes) |
|
624
|
|
|
|
FreeOpcUa /
python-opcua
