SVGHMI: add "unsubscribable" property to widgets in order to generalize what already happens for jump buttons.
In most cases jump buttons do not really subscribe to pointed HMI variable, path is given as a relative page jump path. When widget.unsubscribable is set to true, no subscription is made on page switch, but still offset is updated.
This fixes bug happening on relative jump buttons without "disabled" element where offset did not change on relative page switch.
from __future__ import absolute_import
from __future__ import print_function
import os
from binascii import b2a_hqx
try:
from runtime.spawn_subprocess import call
except ImportError:
from subprocess import call
restart_stunnel_cmdline = ["/etc/init.d/S50stunnel", "restart"]
_PSKpath = None
def restartStunnel():
"""
Restart stunnel service using SysV init stript
to apply new generated credentials
"""
try:
call(restart_stunnel_cmdline)
except OSError:
print(_("Couldn't restart stunnel service"))
def PSKgen(ID, PSKpath):
# b2a_hqx output len is 4/3 input len
secret = os.urandom(192) # int(256/1.3333)
secretstring = b2a_hqx(secret)
PSKstring = ID+":"+secretstring
with open(PSKpath, 'w') as f:
f.write(PSKstring)
restartStunnel()
def ensurePSK(ID, PSKpath):
global _PSKpath
_PSKpath = PSKpath
# check if already there
if not os.path.exists(PSKpath):
# create if needed
PSKgen(ID, PSKpath)
def getPSKID(errorlog):
if _PSKpath is not None:
if not os.path.exists(_PSKpath):
errorlog(
'Error: Pre-Shared-Key Secret in %s is missing!\n' % _PSKpath)
return None
ID, _sep, PSK = open(_PSKpath).read().partition(':')
PSK = PSK.rstrip('\n\r')
return (ID, PSK)
return None