author | Edouard Tisserant |
Thu, 11 Jan 2018 13:02:09 +0100 | |
changeset 1899 | ff4410112b67 |
parent 1881 | 091005ec69c4 |
child 1919 | ccea0fa6ea91 |
permissions | -rwxr-xr-x |
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1 |
#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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3 |
|
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4 |
# This file is part of Beremiz, a Integrated Development Environment for |
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5 |
# programming IEC 61131-3 automates supporting plcopen standard and CanFestival. |
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6 |
# |
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7 |
# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD |
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8 |
# |
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9 |
# See COPYING file for copyrights details. |
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10 |
# |
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11 |
# This program is free software; you can redistribute it and/or |
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12 |
# modify it under the terms of the GNU General Public License |
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13 |
# as published by the Free Software Foundation; either version 2 |
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14 |
# of the License, or (at your option) any later version. |
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15 |
# |
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16 |
# This program is distributed in the hope that it will be useful, |
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17 |
# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 |
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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19 |
# GNU General Public License for more details. |
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20 |
# |
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21 |
# You should have received a copy of the GNU General Public License |
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22 |
# along with this program; if not, write to the Free Software |
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23 |
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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24 |
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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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30 |
import copy |
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import socket |
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import os.path |
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33 |
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import Pyro |
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import Pyro.core |
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import Pyro.util |
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37 |
from Pyro.errors import PyroError |
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38 |
|
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39 |
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40 |
service_type = '_PYRO._tcp.local.' |
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# this module attribute contains a list of DNS-SD (Zeroconf) service types |
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# supported by this connector confnode. |
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43 |
# |
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# for connectors that do not support DNS-SD, this attribute can be omitted |
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45 |
# or set to an empty list. |
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46 |
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47 |
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48 |
def PYRO_connector_factory(uri, confnodesroot): |
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49 |
""" |
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This returns the connector to Pyro style PLCobject |
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51 |
""" |
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52 |
confnodesroot.logger.write(_("PYRO connecting to URI : %s\n") % uri) |
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53 |
|
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54 |
servicetype, location = uri.split("://") |
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55 |
if servicetype == "PYROS": |
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56 |
schemename = "PYROLOCSSL" |
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57 |
# Protect against name->IP substitution in Pyro3 |
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58 |
Pyro.config.PYRO_DNS_URI = True |
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59 |
# Beware Pyro lib need str path, not unicode |
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# don't rely on PYRO_STORAGE ! see documentation |
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61 |
Pyro.config.PYROSSL_CERTDIR = os.path.abspath(str(confnodesroot.ProjectPath) + '/certs') |
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62 |
if not os.path.exists(Pyro.config.PYROSSL_CERTDIR): |
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63 |
confnodesroot.logger.write_error( |
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64 |
'Error : the directory %s is missing for SSL certificates (certs_dir).' |
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65 |
'Please fix it in your project.\n' % Pyro.config.PYROSSL_CERTDIR) |
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66 |
return None |
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67 |
else: |
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68 |
confnodesroot.logger.write(_("PYRO using certificates in '%s' \n") |
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% (Pyro.config.PYROSSL_CERTDIR)) |
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Pyro.config.PYROSSL_CERT = "client.crt" |
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Pyro.config.PYROSSL_KEY = "client.key" |
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72 |
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# Ugly Monkey Patching |
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74 |
def _gettimeout(self): |
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return self.timeout |
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76 |
|
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77 |
def _settimeout(self, timeout): |
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self.timeout = timeout |
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79 |
from M2Crypto.SSL import Connection |
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80 |
Connection.timeout = None |
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81 |
Connection.gettimeout = _gettimeout |
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Connection.settimeout = _settimeout |
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# M2Crypto.SSL.Checker.WrongHost: Peer certificate commonName does not |
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84 |
# match host, expected 127.0.0.1, got server |
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85 |
Connection.clientPostConnectionCheck = None |
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86 |
else: |
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87 |
schemename = "PYROLOC" |
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88 |
if location.find(service_type) != -1: |
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89 |
try: |
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90 |
from zeroconf import Zeroconf |
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91 |
r = Zeroconf() |
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92 |
i = r.get_service_info(service_type, location) |
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93 |
if i is None: |
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94 |
raise Exception("'%s' not found" % location) |
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95 |
ip = str(socket.inet_ntoa(i.address)) |
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96 |
port = str(i.port) |
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97 |
newlocation = ip + ':' + port |
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98 |
confnodesroot.logger.write(_("'{a1}' is located at {a2}\n").format(a1=location, a2=newlocation)) |
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99 |
location = newlocation |
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100 |
r.close() |
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101 |
except Exception: |
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102 |
confnodesroot.logger.write_error(_("MDNS resolution failure for '%s'\n") % location) |
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103 |
confnodesroot.logger.write_error(traceback.format_exc()) |
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104 |
return None |
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105 |
|
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106 |
# Try to get the proxy object |
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107 |
try: |
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108 |
RemotePLCObjectProxy = Pyro.core.getAttrProxyForURI(schemename + "://" + location + "/PLCObject") |
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109 |
except Exception: |
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110 |
confnodesroot.logger.write_error(_("Connection to '%s' failed.\n") % location) |
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111 |
confnodesroot.logger.write_error(traceback.format_exc()) |
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112 |
return None |
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113 |
|
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114 |
def PyroCatcher(func, default=None): |
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115 |
""" |
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116 |
A function that catch a Pyro exceptions, write error to logger |
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117 |
and return default value when it happen |
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118 |
""" |
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119 |
def catcher_func(*args, **kwargs): |
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120 |
try: |
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121 |
return func(*args, **kwargs) |
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122 |
except Pyro.errors.ConnectionClosedError, e: |
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123 |
confnodesroot.logger.write_error(_("Connection lost!\n")) |
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124 |
confnodesroot._SetConnector(None) |
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125 |
except Pyro.errors.ProtocolError, e: |
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126 |
confnodesroot.logger.write_error(_("Pyro exception: %s\n") % e) |
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127 |
except Exception, e: |
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128 |
# confnodesroot.logger.write_error(traceback.format_exc()) |
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129 |
errmess = ''.join(Pyro.util.getPyroTraceback(e)) |
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130 |
confnodesroot.logger.write_error(errmess + "\n") |
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131 |
print(errmess) |
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132 |
confnodesroot._SetConnector(None) |
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133 |
return default |
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134 |
return catcher_func |
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135 |
|
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136 |
# Check connection is effective. |
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137 |
# lambda is for getattr of GetPLCstatus to happen inside catcher |
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138 |
if PyroCatcher(RemotePLCObjectProxy.GetPLCstatus)() is None: |
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139 |
confnodesroot.logger.write_error(_("Cannot get PLC status - connection failed.\n")) |
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140 |
return None |
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141 |
|
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142 |
class PyroProxyProxy(object): |
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143 |
""" |
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144 |
A proxy proxy class to handle Beremiz Pyro interface specific behavior. |
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145 |
And to put Pyro exception catcher in between caller and Pyro proxy |
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146 |
""" |
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147 |
def __init__(self): |
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148 |
# for safe use in from debug thread, must create a copy |
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149 |
self.RemotePLCObjectProxyCopy = None |
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150 |
|
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151 |
def GetPyroProxy(self): |
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152 |
""" |
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153 |
This func returns the real Pyro Proxy. |
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154 |
Use this if you musn't keep reference to it. |
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155 |
""" |
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156 |
return RemotePLCObjectProxy |
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157 |
|
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158 |
def _PyroStartPLC(self, *args, **kwargs): |
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159 |
""" |
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160 |
confnodesroot._connector.GetPyroProxy() is used |
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161 |
rather than RemotePLCObjectProxy because |
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162 |
object is recreated meanwhile, |
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163 |
so we must not keep ref to it here |
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164 |
""" |
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165 |
current_status, _log_count = confnodesroot._connector.GetPyroProxy().GetPLCstatus() |
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166 |
if current_status == "Dirty": |
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167 |
# Some bad libs with static symbols may polute PLC |
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168 |
# ask runtime to suicide and come back again |
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169 |
|
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170 |
confnodesroot.logger.write(_("Force runtime reload\n")) |
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171 |
confnodesroot._connector.GetPyroProxy().ForceReload() |
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172 |
confnodesroot._Disconnect() |
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173 |
# let remote PLC time to resurect.(freeze app) |
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174 |
sleep(0.5) |
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175 |
confnodesroot._Connect() |
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176 |
self.RemotePLCObjectProxyCopy = copy.copy(confnodesroot._connector.GetPyroProxy()) |
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177 |
return confnodesroot._connector.GetPyroProxy().StartPLC(*args, **kwargs) |
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178 |
StartPLC = PyroCatcher(_PyroStartPLC, False) |
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179 |
|
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180 |
def _PyroGetTraceVariables(self): |
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181 |
""" |
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182 |
for safe use in from debug thread, must use the copy |
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183 |
""" |
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184 |
if self.RemotePLCObjectProxyCopy is None: |
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185 |
self.RemotePLCObjectProxyCopy = copy.copy(confnodesroot._connector.GetPyroProxy()) |
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186 |
return self.RemotePLCObjectProxyCopy.GetTraceVariables() |
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187 |
GetTraceVariables = PyroCatcher(_PyroGetTraceVariables, ("Broken", None)) |
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188 |
|
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189 |
def _PyroGetPLCstatus(self): |
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190 |
return RemotePLCObjectProxy.GetPLCstatus() |
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191 |
GetPLCstatus = PyroCatcher(_PyroGetPLCstatus, ("Broken", None)) |
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192 |
|
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193 |
def _PyroRemoteExec(self, script, **kwargs): |
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194 |
return RemotePLCObjectProxy.RemoteExec(script, **kwargs) |
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195 |
RemoteExec = PyroCatcher(_PyroRemoteExec, (-1, "RemoteExec script failed!")) |
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196 |
|
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197 |
def __getattr__(self, attrName): |
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198 |
member = self.__dict__.get(attrName, None) |
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199 |
if member is None: |
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200 |
def my_local_func(*args, **kwargs): |
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201 |
return RemotePLCObjectProxy.__getattr__(attrName)(*args, **kwargs) |
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202 |
member = PyroCatcher(my_local_func, None) |
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203 |
self.__dict__[attrName] = member |
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204 |
return member |
6ebd9c40b2be
convert some files from CRLF to LF
Andrey Skvortsov <andrej.skvortzov@gmail.com>
parents:
1595
diff
changeset
|
205 |
|
6ebd9c40b2be
convert some files from CRLF to LF
Andrey Skvortsov <andrej.skvortzov@gmail.com>
parents:
1595
diff
changeset
|
206 |
return PyroProxyProxy() |