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import sys, os |
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from rsudp import printM, printW, printE |
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from rsudp.raspberryshake import ConsumerThread |
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from rsudp.test import TEST |
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class Custom(ConsumerThread): |
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""" |
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.. versionadded:: 0.4.3 |
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.. |lineendings_howto| raw:: html |
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<a href="https://stackoverflow.com/questions/17579553/windows-command-to-convert-unix-line-endings" target="_blank">this stackoverflow question</a> |
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.. |lineendings_wiki| raw:: html |
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<a href="https://en.wikipedia.org/wiki/Newline" target="_blank">here</a> |
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.. role:: json(code) |
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:language: json |
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A consumer class that runs custom code from a python file passed to it. |
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Please read the disclaimers and warnings at :ref:`customcode` prior to using this module. |
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.. warning:: |
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If you are running Windows and have code you want to pass to the :py:func:`exec` function, |
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Python requires that your newline characters are in the UNIX style (:code:`\\n`), |
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not the standard Windows style (:code:`\\r\\n`). |
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To convert, follow the instructions in one of the answers to |lineendings_howto|. |
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If you're not sure what this means, please read about newline/line ending characters |lineendings_wiki|. |
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If you are certain that your code file has no Windows newlines, you can set :json:`"win_override"` to true. |
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Read more warnings about this module at :ref:`customcode`. |
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:param queue.Queue q: queue of data and messages sent by :class:`rsudp.c_consumer.Consumer`. |
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:param codefile: string of the python (.py) file to run, or False if none. |
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:type codefile: str or bool |
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:param bool win_ovr: user check to make sure that line ending format is correct (see warning above) |
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""" |
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def __init__(self, q=False, codefile=False, win_ovr=False, testing=False): |
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""" |
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Initializes the custom code execution thread. |
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""" |
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super().__init__() |
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self.sender = 'Custom' |
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self.alive = True |
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self.testing = testing |
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self.codefile = False |
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self.win_ovr = win_ovr |
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if codefile: |
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if (os.path.exists(os.path.expanduser(codefile))) and (os.path.splitext(codefile)[1]): |
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self.codefile = os.path.expanduser(codefile) |
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printM('Custom code file to run: %s' % self.codefile, sender=self.sender) |
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else: |
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printW('No python file exists at %s. No custom code will be run during alarms.' % codefile, sender=self.sender) |
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else: |
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printW('No custom code file set. No custom code will be run during alarms.', sender=self.sender) |
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if (os.name in 'nt') and (not self.win_ovr): |
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printE('Using Windows with custom alert code! Your code MUST have UNIX/Mac newline characters!') |
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printE('Please use a conversion tool like dos2unix to convert line endings', spaces=True) |
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printE('(https://en.wikipedia.org/wiki/Unix2dos) to make your code file', spaces=True) |
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printE('readable to the Python interpreter.', spaces=True) |
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printE('Once you have done that, please set "win_override" to true', spaces=True) |
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printE('in the settings file.', spaces=True) |
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printE('(see also footnote [1] on this page: https://docs.python.org/3/library/functions.html#id2)', spaces=True) |
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printE('THREAD EXITING, please correct and restart!', self.sender, spaces=True) |
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sys.exit(2) |
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else: |
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pass |
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if q: |
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self.queue = q |
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else: |
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printE('no queue passed to the consumer thread! We will exit now!', |
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self.sender) |
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sys.stdout.flush() |
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self.alive = False |
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sys.exit() |
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printM('Starting.', self.sender) |
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def exec_code(self): |
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if self.codefile: |
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# if the user has set a code file |
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printM('Executing code from file: %s' % self.codefile, sender=self.sender) |
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try: |
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# try to execute some code |
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exec(self.codefile) |
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if self.testing: |
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TEST['c_custom'][1] = True |
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except Exception as e: |
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# do something if it fails |
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printE('Code execution failed. Error: %s' % e, sender=self.sender, announce=False) |
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else: |
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printW('No code to run, codefile variable not set correctly.', sender=self.sender) |
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def run(self): |
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""" |
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Reads data from the queue and executes self.codefile if it sees an ``ALARM`` message. |
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Quits if it sees a ``TERM`` message. |
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""" |
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while True: |
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d = self.queue.get() |
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self.queue.task_done() |
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if 'TERM' in str(d): |
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self.alive = False |
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printM('Exiting.', self.sender) |
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sys.exit() |
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elif 'ALARM' in str(d): |
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printM('Got ALARM message...', sender=self.sender) |
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self.exec_code() |
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self.alive = False |
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raspishake /
rsudp
