257 lines
9.1 KiB
Python
257 lines
9.1 KiB
Python
#Use this for OpenPLC console: http://eyalarubas.com/python-subproc-nonblock.html
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import subprocess
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import socket
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import errno
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import time
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from threading import Thread
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from Queue import Queue, Empty
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intervals = (
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('weeks', 604800), # 60 * 60 * 24 * 7
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('days', 86400), # 60 * 60 * 24
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('hours', 3600), # 60 * 60
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('minutes', 60),
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('seconds', 1),
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)
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def display_time(seconds, granularity=2):
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result = []
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for name, count in intervals:
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value = seconds // count
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if value:
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seconds -= value * count
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if value == 1:
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name = name.rstrip('s')
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result.append("{} {}".format(value, name))
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return ', '.join(result[:granularity])
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class NonBlockingStreamReader:
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end_of_stream = False
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def __init__(self, stream):
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'''
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stream: the stream to read from.
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Usually a process' stdout or stderr.
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'''
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self._s = stream
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self._q = Queue()
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def _populateQueue(stream, queue):
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'''
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Collect lines from 'stream' and put them in 'queue'.
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'''
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#while True:
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while (self.end_of_stream == False):
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line = stream.readline()
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if line:
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queue.put(line)
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if (line.find("Compilation finished with errors!") >= 0 or line.find("Compilation finished successfully!") >= 0):
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self.end_of_stream = True
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else:
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self.end_of_stream = True
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raise UnexpectedEndOfStream
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self._t = Thread(target = _populateQueue, args = (self._s, self._q))
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self._t.daemon = True
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self._t.start() #start collecting lines from the stream
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def readline(self, timeout = None):
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try:
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return self._q.get(block = timeout is not None,
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timeout = timeout)
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except Empty:
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return None
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class UnexpectedEndOfStream(Exception): pass
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class runtime:
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project_file = ""
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project_name = ""
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project_description = ""
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runtime_status = "Stopped"
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def start_runtime(self):
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if (self.status() == "Stopped"):
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self.theprocess = subprocess.Popen(['./core/openplc']) # XXX: iPAS
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self.runtime_status = "Running"
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def stop_runtime(self):
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if (self.status() == "Running"):
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try:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.connect(('localhost', 43628))
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s.send('quit()\n')
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data = s.recv(1000)
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s.close()
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self.runtime_status = "Stopped"
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while self.theprocess.poll() is None: # XXX: iPAS, to prevent the defunct killed process.
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time.sleep(1) # https://www.reddit.com/r/learnpython/comments/776r96/defunct_python_process_when_using_subprocesspopen/
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except socket.error as serr:
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print("Failed to stop the runtime. Error: " + str(serr))
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def compile_program(self, st_file):
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if (self.status() == "Running"):
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self.stop_runtime()
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self.is_compiling = True
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global compilation_status_str
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global compilation_object
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compilation_status_str = ""
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a = subprocess.Popen(['./scripts/compile_program.sh', str(st_file)], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
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compilation_object = NonBlockingStreamReader(a.stdout)
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def compilation_status(self):
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global compilation_status_str
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global compilation_object
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while True:
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line = compilation_object.readline()
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if not line: break
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compilation_status_str += line
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return compilation_status_str
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def status(self):
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if ('compilation_object' in globals()):
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if (compilation_object.end_of_stream == False):
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return "Compiling"
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#If it is running, make sure that it really is running
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if (self.runtime_status == "Running"):
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try:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.connect(('localhost', 43628))
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s.send('exec_time()\n')
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data = s.recv(10000)
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s.close()
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self.runtime_status = "Running"
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except socket.error as serr:
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print("OpenPLC Runtime is not running. Error: " + str(serr))
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self.runtime_status = "Stopped"
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return self.runtime_status
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def start_modbus(self, port_num):
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if (self.status() == "Running"):
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try:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.connect(('localhost', 43628))
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s.send('start_modbus(' + str(port_num) + ')\n')
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data = s.recv(1000)
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s.close()
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except:
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print("Error connecting to OpenPLC runtime")
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def stop_modbus(self):
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if (self.status() == "Running"):
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try:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.connect(('localhost', 43628))
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s.send('stop_modbus()\n')
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data = s.recv(1000)
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s.close()
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except:
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print("Error connecting to OpenPLC runtime")
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def start_dnp3(self, port_num):
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if (self.status() == "Running"):
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try:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.connect(('localhost', 43628))
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s.send('start_dnp3(' + str(port_num) + ')\n')
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data = s.recv(1000)
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s.close()
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except:
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print("Error connecting to OpenPLC runtime")
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def stop_dnp3(self):
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if (self.status() == "Running"):
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try:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.connect(('localhost', 43628))
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s.send('stop_dnp3()\n')
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data = s.recv(1000)
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s.close()
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except:
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print("Error connecting to OpenPLC runtime")
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def start_enip(self, port_num):
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if (self.status() == "Running"):
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try:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.connect(('localhost', 43628))
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s.send('start_enip(' + str(port_num) + ')\n')
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data = s.recv(1000)
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s.close()
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except:
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print("Error connecting to OpenPLC runtime")
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def stop_enip(self):
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if (self.status() == "Running"):
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try:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.connect(('localhost', 43628))
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s.send('stop_enip()\n')
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data = s.recv(1000)
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s.close()
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except:
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print("Error connecting to OpenPLC runtime")
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def start_pstorage(self, poll_rate):
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if (self.status() == "Running"):
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try:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.connect(('localhost', 43628))
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s.send('start_pstorage(' + str(poll_rate) + ')\n')
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data = s.recv(1000)
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s.close()
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except:
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print("Error connecting to OpenPLC runtime")
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def stop_pstorage(self):
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if (self.status() == "Running"):
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try:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.connect(('localhost', 43628))
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s.send('stop_pstorage()\n')
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data = s.recv(1000)
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s.close()
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except:
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print("Error connecting to OpenPLC runtime")
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def logs(self):
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if (self.status() == "Running"):
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try:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.connect(('localhost', 43628))
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s.send('runtime_logs()\n')
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data = s.recv(1000000)
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s.close()
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return data
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except:
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print("Error connecting to OpenPLC runtime")
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return "Error connecting to OpenPLC runtime"
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else:
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return "OpenPLC Runtime is not running"
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def exec_time(self):
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if (self.status() == "Running"):
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try:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.connect(('localhost', 43628))
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s.send('exec_time()\n')
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data = s.recv(10000)
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s.close()
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return display_time(int(data), 4)
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except:
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print("Error connecting to OpenPLC runtime")
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return "Error connecting to OpenPLC runtime"
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else:
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return "N/A"
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