292 lines
8.0 KiB
Python
292 lines
8.0 KiB
Python
"""
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Python part of radio playout (pypo)
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"""
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from optparse import OptionParser
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from datetime import datetime
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import telnetlib
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import time
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import sys
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import signal
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import logging
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import locale
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import os
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import re
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from Queue import Queue
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from threading import Lock
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from pypopush import PypoPush
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from pypofetch import PypoFetch
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from pypofile import PypoFile
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from recorder import Recorder
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from listenerstat import ListenerStat
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from pypomessagehandler import PypoMessageHandler
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from pypoliquidsoap import PypoLiquidsoap
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from timeout import ls_timeout
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from configobj import ConfigObj
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# custom imports
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from api_clients import api_client
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from std_err_override import LogWriter
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import pure
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# Set up command-line options
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parser = OptionParser()
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# help screen / info
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usage = "%prog [options]" + " - python playout system"
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parser = OptionParser(usage=usage)
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# Options
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parser.add_option("-v", "--compat",
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help="Check compatibility with server API version",
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default=False,
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action="store_true",
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dest="check_compat")
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parser.add_option("-t", "--test",
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help="Do a test to make sure everything is working properly.",
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default=False,
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action="store_true",
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dest="test")
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parser.add_option("-b",
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"--cleanup",
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help="Cleanup",
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default=False,
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action="store_true",
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dest="cleanup")
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parser.add_option("-c",
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"--check",
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help="Check the cached schedule and exit",
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default=False,
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action="store_true",
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dest="check")
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# parse options
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(options, args) = parser.parse_args()
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LIQUIDSOAP_MIN_VERSION = "1.1.1"
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#need to wait for Python 2.7 for this..
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#logging.captureWarnings(True)
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# configure logging
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try:
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logging.config.fileConfig("logging.cfg")
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logger = logging.getLogger()
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LogWriter.override_std_err(logger)
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except Exception, e:
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print "Couldn't configure logging"
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sys.exit(1)
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def configure_locale():
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"""
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Silly hacks to force Python 2.x to run in UTF-8 mode. Not portable at all,
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however serves our purpose at the moment.
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More information available here:
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http://stackoverflow.com/questions/3828723/why-we-need-sys-setdefaultencodingutf-8-in-a-py-script
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"""
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logger.debug("Before %s", locale.nl_langinfo(locale.CODESET))
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current_locale = locale.getlocale()
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if current_locale[1] is None:
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logger.debug("No locale currently set. Attempting to get default locale.")
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default_locale = locale.getdefaultlocale()
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if default_locale[1] is None:
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logger.debug("No default locale exists. Let's try loading from \
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/etc/default/locale")
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if os.path.exists("/etc/default/locale"):
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locale_config = ConfigObj('/etc/default/locale')
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lang = locale_config.get('LANG')
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new_locale = lang
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else:
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logger.error("/etc/default/locale could not be found! Please \
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run 'sudo update-locale' from command-line.")
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sys.exit(1)
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else:
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new_locale = default_locale
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logger.info("New locale set to: %s", \
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locale.setlocale(locale.LC_ALL, new_locale))
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reload(sys)
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sys.setdefaultencoding("UTF-8")
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current_locale_encoding = locale.getlocale()[1].lower()
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logger.debug("sys default encoding %s", sys.getdefaultencoding())
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logger.debug("After %s", locale.nl_langinfo(locale.CODESET))
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if current_locale_encoding not in ['utf-8', 'utf8']:
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logger.error("Need a UTF-8 locale. Currently '%s'. Exiting..." % \
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current_locale_encoding)
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sys.exit(1)
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configure_locale()
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# loading config file
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try:
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config = ConfigObj('/etc/airtime/pypo.cfg')
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except Exception, e:
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logger.error('Error loading config file: %s', e)
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sys.exit(1)
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class Global:
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def __init__(self, api_client):
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self.api_client = api_client
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def selfcheck(self):
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return self.api_client.is_server_compatible()
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def test_api(self):
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self.api_client.test()
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def keyboardInterruptHandler(signum, frame):
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logger = logging.getLogger()
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logger.info('\nKeyboard Interrupt\n')
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sys.exit(0)
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@ls_timeout
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def liquidsoap_get_info(telnet_lock, host, port, logger):
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logger.debug("Checking to see if Liquidsoap is running")
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try:
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telnet_lock.acquire()
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tn = telnetlib.Telnet(host, port)
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msg = "version\n"
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tn.write(msg)
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tn.write("exit\n")
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response = tn.read_all()
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except Exception, e:
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logger.error(str(e))
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return None
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finally:
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telnet_lock.release()
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return get_liquidsoap_version(response)
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def get_liquidsoap_version(version_string):
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m = re.match(r"Liquidsoap (\d+.\d+.\d+)", version_string)
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if m:
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return m.group(1)
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else:
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return None
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if m:
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current_version = m.group(1)
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return pure.version_cmp(current_version, LIQUIDSOAP_MIN_VERSION) >= 0
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return False
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def liquidsoap_startup_test():
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liquidsoap_version_string = \
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liquidsoap_get_info(telnet_lock, ls_host, ls_port, logger)
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while not liquidsoap_version_string:
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logger.warning("Liquidsoap doesn't appear to be running!, " + \
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"Sleeping and trying again")
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time.sleep(1)
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liquidsoap_version_string = \
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liquidsoap_get_info(telnet_lock, ls_host, ls_port, logger)
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while pure.version_cmp(liquidsoap_version_string, LIQUIDSOAP_MIN_VERSION) < 0:
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logger.warning("Liquidsoap is running but in incorrect version! " + \
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"Make sure you have at least Liquidsoap %s installed" % LIQUIDSOAP_MIN_VERSION)
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time.sleep(1)
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liquidsoap_version_string = \
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liquidsoap_get_info(telnet_lock, ls_host, ls_port, logger)
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logger.info("Liquidsoap version string found %s" % liquidsoap_version_string)
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if __name__ == '__main__':
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logger.info('###########################################')
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logger.info('# *** pypo *** #')
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logger.info('# Liquidsoap Scheduled Playout System #')
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logger.info('###########################################')
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#Although all of our calculations are in UTC, it is useful to know what timezone
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#the local machine is, so that we have a reference for what time the actual
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#log entries were made
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logger.info("Timezone: %s" % str(time.tzname))
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logger.info("UTC time: %s" % str(datetime.utcnow()))
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signal.signal(signal.SIGINT, keyboardInterruptHandler)
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api_client = api_client.AirtimeApiClient()
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g = Global(api_client)
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while not g.selfcheck():
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time.sleep(5)
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success = False
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while not success:
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try:
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api_client.register_component('pypo')
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success = True
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except Exception, e:
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logger.error(str(e))
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time.sleep(10)
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telnet_lock = Lock()
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ls_host = config['ls_host']
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ls_port = config['ls_port']
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liquidsoap_startup_test()
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if options.test:
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g.test_api()
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sys.exit(0)
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pypoFetch_q = Queue()
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recorder_q = Queue()
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pypoPush_q = Queue()
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pypo_liquidsoap = PypoLiquidsoap(logger, telnet_lock,\
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ls_host, ls_port)
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"""
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This queue is shared between pypo-fetch and pypo-file, where pypo-file
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is the consumer. Pypo-fetch will send every schedule it gets to pypo-file
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and pypo will parse this schedule to determine which file has the highest
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priority, and retrieve it.
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"""
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media_q = Queue()
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pmh = PypoMessageHandler(pypoFetch_q, recorder_q, config)
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pmh.daemon = True
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pmh.start()
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pfile = PypoFile(media_q, config)
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pfile.daemon = True
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pfile.start()
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pf = PypoFetch(pypoFetch_q, pypoPush_q, media_q, telnet_lock, pypo_liquidsoap, config)
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pf.daemon = True
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pf.start()
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pp = PypoPush(pypoPush_q, telnet_lock, pypo_liquidsoap, config)
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pp.daemon = True
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pp.start()
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recorder = Recorder(recorder_q)
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recorder.daemon = True
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recorder.start()
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stat = ListenerStat(config)
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stat.daemon = True
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stat.start()
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pf.join()
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logger.info("System exit")
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