def find_servers(self, uris=None):
"""
send a FindServer request to the server. The answer should be a list of
servers the server knows about
A list of uris can be provided, only server having matching uris will be returned
"""
if uris is None:
uris = []
params = ua.FindServersParameters()
params.EndpointUrl = self.server_url.geturl()
params.ServerUris = uris
return self.uaclient.find_servers(params)
def find_servers_test(client, logger):
# Note: LocaleIds are not tested here because it is already done in UACTT
defaultAddress = "opc.tcp://localhost:4841"
# No filters in FindServers by default
params = ua.FindServersParameters()
# Register 0 servers: retrieve server-Self
Servers = client.uaclient.find_servers(params)
logger.add_test(
'FindServers test - expect 0 registered server but self returned "{}"'.
format("urn:S2OPC:localhost"),
(1 == len(Servers)
and check_self_in_find_servers_response(defaultAddress, Servers[0])))
# Register 1 server and retrieve it
local_register_server2(client, logger, "TestServer1", defaultAddress,
allServerCapabilities, True)
Servers = client.uaclient.find_servers(params)
logger.add_test(
'FindServers test - expect 1 registered server "{}" + self'.format(
"urn:S2OPC:TestServer1"),
(2 == len(Servers)
and "urn:S2OPC:TestServer1" == Servers[0].ApplicationUri
and defaultAddress == Servers[0].DiscoveryUrls[0]
and check_self_in_find_servers_response(defaultAddress, Servers[1])))
# UnRegister 1 server and check not present anymore
local_register_server2(client, logger, "TestServer1", defaultAddress,
allServerCapabilities, False)
Servers = client.uaclient.find_servers(params)
logger.add_test(
'FindServers test - expect 0 registered server + self',
1 == len(Servers)
and check_self_in_find_servers_response(defaultAddress, Servers[0]))
# Register 2 times same server name: expect only last record to be returned
local_register_server2(client, logger, "TestServer1", defaultAddress,
allServerCapabilities, True)
local_register_server2(client, logger, "TestServer1",
"opc.tcp://test:1000", allServerCapabilities, True)
Servers = client.uaclient.find_servers(params)
logger.add_test(
'FindServers test - expect only 1 registered server "{}" with last record content + self'
.format("urn:S2OPC:TestServer1"),
(2 == len(Servers)
and "urn:S2OPC:TestServer1" == Servers[0].ApplicationUri
and "opc.tcp://test:1000" == Servers[0].DiscoveryUrls[0]
and check_self_in_find_servers_response(defaultAddress, Servers[1])))
# Register a second server with unknown capabilities
local_register_server2(client, logger, "TestServer2", defaultAddress,
["NA"], True)
Servers = client.uaclient.find_servers(params)
logger.add_test(
'FindServers test - expect 2 registered server 1 with all and 1 without capabilities',
(3 == len(Servers)
and "urn:S2OPC:TestServer1" == Servers[0].ApplicationUri
and "urn:S2OPC:TestServer2" == Servers[1].ApplicationUri
and check_self_in_find_servers_response(defaultAddress, Servers[2])))
# Register a third server with only 'LDS' capability
local_register_server2(client, logger, "TestServer3", defaultAddress,
["LDS"], True)
Servers = client.uaclient.find_servers(params)
logger.add_test(
'FindServers test - expect 3 registered server 1 with all, 1 without capabilities and 1 with "LDS" only',
(4 == len(Servers)
and "urn:S2OPC:TestServer1" == Servers[0].ApplicationUri
and "urn:S2OPC:TestServer2" == Servers[1].ApplicationUri
and "urn:S2OPC:TestServer3" == Servers[2].ApplicationUri
and check_self_in_find_servers_response(defaultAddress, Servers[3])))
# Filter using the serverUri: request server 1
params.ServerUris = ["urn:S2OPC:TestServer1"]
Servers = client.uaclient.find_servers(params)
logger.add_test(
'FindServers test - filter with serverUri of server 1: expect only 1 registered server',
(1 == len(Servers)
and "urn:S2OPC:TestServer1" == Servers[0].ApplicationUri))
# Filter using the serverUri: request server 3
params.ServerUris = ["urn:S2OPC:TestServer3"]
Servers = client.uaclient.find_servers(params)
logger.add_test(
'FindServers test - filter with serverUri of server 3: expect only 3 registered server',
(1 == len(Servers)
and "urn:S2OPC:TestServer3" == Servers[0].ApplicationUri))
# Filter using the serverUri: request server 1 & 2
params.ServerUris = ["urn:S2OPC:TestServer1", "urn:S2OPC:TestServer2"]
Servers = client.uaclient.find_servers(params)
logger.add_test(
'FindServers test - filter with serverUri of server 1 & 2: expect 2 registered server',
(2 == len(Servers)
and "urn:S2OPC:TestServer1" == Servers[0].ApplicationUri
and "urn:S2OPC:TestServer2" == Servers[1].ApplicationUri))
# Filter using the serverUri: request server 1 & 2 & 3
params.ServerUris = [
"urn:S2OPC:TestServer1", "urn:S2OPC:TestServer2",
"urn:S2OPC:TestServer3"
]
Servers = client.uaclient.find_servers(params)
logger.add_test(
'FindServers test - filter with serverUri of server 1 & 2 & 3: expect 3 registered server',
(3 == len(Servers)
and "urn:S2OPC:TestServer1" == Servers[0].ApplicationUri
and "urn:S2OPC:TestServer2" == Servers[1].ApplicationUri
and "urn:S2OPC:TestServer3" == Servers[2].ApplicationUri))
# UnRegister all servers
local_register_server2(client, logger, "TestServer1", defaultAddress, [],
False)
local_register_server2(client, logger, "TestServer2", defaultAddress, [],
False)
local_register_server2(client, logger, "TestServer3", defaultAddress, [],
False)
