connectors/PYRO/__init__.py
author Edouard Tisserant
Fri, 15 Nov 2019 10:34:14 +0100
branchsvghmi
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parent 2622 e10a1095f577
child 3750 f62625418bff
child 3861 7e17f7e02a2b
permissions -rw-r--r--
SVGHMI: Added simple HMI Tree View.
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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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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import PSKManagement as PSK
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from connectors.PYRO.PSK_Adapter import setupPSKAdapter
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from runtime import PlcStatus
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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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    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 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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            return default
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        return catcher_func
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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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1cf3768ebf85 Automatically get PSK and ID when connecting to PYRO[S], so that future connection through PYROS can use that same key. Also fixed case to UPPER for *PSK.
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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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    else:
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parents: 2478
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        ID, secret = IDPSK
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        PSK.UpdateID(confnodesroot.ProjectPath, ID, secret, uri)
1731
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1995
691d119ba20f Removed DebugThread. Take advantage of the fact that buffering is done in runtime. No need to poll for traces more than ten per second, then use simple wxTimer for that. Also removed Debug Lock since now everything happens in wx' mainloop.
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    _special_return_funcs = {
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        "StartPLC": False,
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        "GetTraceVariables": (PlcStatus.Broken, None),
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parents: 2010
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        "GetPLCstatus": (PlcStatus.Broken, None),
1995
691d119ba20f Removed DebugThread. Take advantage of the fact that buffering is done in runtime. No need to poll for traces more than ten per second, then use simple wxTimer for that. Also removed Debug Lock since now everything happens in wx' mainloop.
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        "RemoteExec": (-1, "RemoteExec script failed!")
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    }
1997
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parents: 1995
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    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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        """
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        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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                def my_local_func(*args, **kwargs):
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                    return RemotePLCObjectProxy.__getattr__(attrName)(*args, **kwargs)
1995
691d119ba20f Removed DebugThread. Take advantage of the fact that buffering is done in runtime. No need to poll for traces more than ten per second, then use simple wxTimer for that. Also removed Debug Lock since now everything happens in wx' mainloop.
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parents: 1982
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                member = PyroCatcher(my_local_func, _special_return_funcs.get(attrName, None))
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                self.__dict__[attrName] = member
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            return member
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8742337a9fe3 Chunk based transfer for PLC binary and extra files, and some collateral code refactoring.
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    return PyroProxyProxy