author | Edouard Tisserant |
Wed, 29 Nov 2023 11:54:56 +0100 | |
changeset 3861 | 7e17f7e02a2b |
parent 2622 | e10a1095f577 |
child 3881 | 0b3ac94f494c |
permissions | -rw-r--r-- |
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#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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|
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# This file is part of Beremiz, a Integrated Development Environment for |
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# programming IEC 61131-3 automates supporting plcopen standard and CanFestival. |
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# |
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# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD |
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# |
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# See COPYING file for copyrights details. |
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# |
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# This program is free software; you can redistribute it and/or |
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# modify it under the terms of the GNU General Public License |
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# as published by the Free Software Foundation; either version 2 |
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# of the License, or (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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from __future__ import absolute_import |
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from __future__ import print_function |
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import traceback |
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from time import sleep |
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import copy |
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import socket |
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import os.path |
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import Pyro |
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import Pyro.core |
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import Pyro.util |
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from Pyro.errors import PyroError |
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IDManager : refactored a bit, moved some code into PSKManagement.py. Now captures URI and PSK on new PYRO(S) and propose them when editing URI. Import/export still to be implemented.
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import PSKManagement as PSK |
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from connectors.PYRO.PSK_Adapter import setupPSKAdapter |
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def switch_pyro_adapter(use_ssl): |
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""" |
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Reloads Pyro module with new settings. |
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This is workaround for Pyro, because it doesn't work with SSL wrapper. |
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""" |
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# Pyro.config.PYRO_BROKEN_MSGWAITALL = use_ssl |
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reload(Pyro.protocol) |
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if use_ssl: |
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setupPSKAdapter() |
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def PYRO_connector_factory(uri, confnodesroot): |
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""" |
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This returns the connector to Pyro style PLCobject |
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""" |
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confnodesroot.logger.write(_("PYRO connecting to URI : %s\n") % uri) |
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scheme, location = uri.split("://") |
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use_ssl = scheme == "PYROS" |
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switch_pyro_adapter(use_ssl) |
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if use_ssl: |
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schemename = "PYROLOCPSK" |
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url, ID = location.split('#') # TODO fix exception when # not found |
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# load PSK from project |
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secpath = os.path.join(str(confnodesroot.ProjectPath), 'psk', ID+'.secret') |
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if not os.path.exists(secpath): |
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confnodesroot.logger.write_error( |
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'Error: Pre-Shared-Key Secret in %s is missing!\n' % secpath) |
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return None |
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secret = open(secpath).read().partition(':')[2].rstrip('\n\r') |
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Pyro.config.PYROPSK = (secret, ID) |
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# strip ID from URL, so that pyro can understand it. |
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location = url |
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else: |
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schemename = "PYROLOC" |
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# Try to get the proxy object |
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try: |
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RemotePLCObjectProxy = Pyro.core.getAttrProxyForURI(schemename + "://" + location + "/PLCObject") |
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except Exception as e: |
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confnodesroot.logger.write_error( |
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_("Connection to {loc} failed with exception {ex}\n").format( |
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loc=location, ex=str(e))) |
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return None |
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RemotePLCObjectProxy.adapter.setTimeout(60) |
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|
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class MissingCallException(Exception): |
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pass |
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def PyroCatcher(func, default=None): |
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""" |
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A function that catch a Pyro exceptions, write error to logger |
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and return default value when it happen |
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""" |
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def catcher_func(*args, **kwargs): |
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try: |
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return func(*args, **kwargs) |
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except Pyro.errors.ConnectionClosedError as e: |
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confnodesroot._SetConnector(None) |
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confnodesroot.logger.write_error(_("Connection lost!\n")) |
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except Pyro.errors.ProtocolError as e: |
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confnodesroot.logger.write_error(_("Pyro exception: %s\n") % e) |
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except MissingCallException as e: |
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confnodesroot.logger.write_warning(_("Remote call not supported: %s\n") % e.message) |
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except Exception as e: |
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# confnodesroot.logger.write_error(traceback.format_exc()) |
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errmess = ''.join(Pyro.util.getPyroTraceback(e)) |
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confnodesroot.logger.write_error(errmess + "\n") |
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print(errmess) |
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confnodesroot._SetConnector(None) |
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114 |
return default |
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115 |
return catcher_func |
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116 |
|
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# Check connection is effective. |
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# lambda is for getattr of GetPLCstatus to happen inside catcher |
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IDPSK = PyroCatcher(RemotePLCObjectProxy.GetPLCID)() |
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if IDPSK is None: |
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confnodesroot.logger.write_warning(_("PLC did not provide identity and security infomation.\n")) |
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122 |
else: |
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ID, secret = IDPSK |
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PSK.UpdateID(confnodesroot.ProjectPath, ID, secret, uri) |
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125 |
|
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126 |
class PyroProxyProxy(object): |
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""" |
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A proxy proxy class to handle Beremiz Pyro interface specific behavior. |
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And to put Pyro exception catcher in between caller and Pyro proxy |
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130 |
""" |
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131 |
def __getattr__(self, attrName): |
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member = self.__dict__.get(attrName, None) |
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if member is None: |
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134 |
def my_local_func(*args, **kwargs): |
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call = RemotePLCObjectProxy.__getattr__(attrName) |
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136 |
if call is None: |
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137 |
raise MissingCallException(attrName) |
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138 |
else: |
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139 |
return call(*args, **kwargs) |
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member = PyroCatcher(my_local_func, self.PLCObjDefaults.get(attrName, None)) |
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self.__dict__[attrName] = member |
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142 |
return member |
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143 |
|
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144 |
return PyroProxyProxy |