624 lines
23 KiB
Python
Executable File
624 lines
23 KiB
Python
Executable File
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Python part of radio playout (pypo)
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The main functions are "fetch" (./pypo_cli.py -f) and "push" (./pypo_cli.py -p)
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"""
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# python defaults (debian default)
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import time
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import calendar
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import os
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import traceback
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from optparse import *
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import sys
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import time
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import datetime
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import logging
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import logging.config
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import shutil
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import urllib
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import urllib2
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import pickle
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import telnetlib
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import random
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import string
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import operator
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import inspect
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# additional modules (should be checked)
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from configobj import ConfigObj
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# custom imports
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from util import *
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from api_clients import *
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PYPO_VERSION = '1.1'
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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", help="Check compatibility with server API version", default=False, action="store_true", dest="check_compat")
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parser.add_option("-t", "--test", help="Do a test to make sure everything is working properly.", default=False, action="store_true", dest="test")
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parser.add_option("-f", "--fetch-scheduler", help="Fetch the schedule from server. This is a polling process that runs forever.", default=False, action="store_true", dest="fetch_scheduler")
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parser.add_option("-p", "--push-scheduler", help="Push the schedule to Liquidsoap. This is a polling process that runs forever.", default=False, action="store_true", dest="push_scheduler")
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parser.add_option("-b", "--cleanup", help="Cleanup", default=False, action="store_true", dest="cleanup")
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parser.add_option("-c", "--check", help="Check the cached schedule and exit", default=False, action="store_true", dest="check")
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# parse options
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(options, args) = parser.parse_args()
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# configure logging
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logging.config.fileConfig("logging.cfg")
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# loading config file
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try:
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config = ConfigObj('config.cfg')
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POLL_INTERVAL = float(config['poll_interval'])
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PUSH_INTERVAL = 0.5
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#PUSH_INTERVAL = float(config['push_interval'])
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LS_HOST = config['ls_host']
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LS_PORT = config['ls_port']
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except Exception, e:
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print 'Error loading config file: ', e
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sys.exit()
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class Global:
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def __init__(self):
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self.api_client = api_client.api_client_factory(config)
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self.cue_file = CueFile()
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self.set_export_source('scheduler')
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def selfcheck(self):
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self.api_client = api_client.api_client_factory(config)
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if (not self.api_client.is_server_compatible()):
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sys.exit()
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def set_export_source(self, export_source):
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self.export_source = export_source
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self.cache_dir = config["cache_dir"] + self.export_source + '/'
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self.schedule_file = self.cache_dir + 'schedule.pickle'
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self.schedule_tracker_file = self.cache_dir + "schedule_tracker.pickle"
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def test_api(self):
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self.api_client.test()
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def check_schedule(self, export_source):
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logger = logging.getLogger()
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try:
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schedule_file = open(self.schedule_file, "r")
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schedule = pickle.load(schedule_file)
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schedule_file.close()
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except Exception, e:
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logger.error("%s", e)
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schedule = None
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for pkey in sorted(schedule.iterkeys()):
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playlist = schedule[pkey]
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print '*****************************************'
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print '\033[0;32m%s %s\033[m' % ('scheduled at:', str(pkey))
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print 'cached at : ' + self.cache_dir + str(pkey)
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print 'subtype: ' + str(playlist['subtype'])
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print 'played: ' + str(playlist['played'])
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print 'schedule id: ' + str(playlist['schedule_id'])
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print 'duration: ' + str(playlist['duration'])
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print 'source id: ' + str(playlist['x_ident'])
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print '-----------------------------------------'
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for media in playlist['medias']:
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print media
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class PypoPush:
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def __init__(self):
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self.api_client = api_client.api_client_factory(config)
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self.cue_file = CueFile()
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self.set_export_source('scheduler')
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"""
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push_ahead2 MUST be < push_ahead. The difference in these two values
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gives the number of seconds of the window of opportunity for the scheduler
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to catch when a playlist is to be played.
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"""
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self.push_ahead = 15
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self.push_ahead2 = 10
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def set_export_source(self, export_source):
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self.export_source = export_source
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self.cache_dir = config["cache_dir"] + self.export_source + '/'
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self.schedule_file = self.cache_dir + 'schedule.pickle'
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self.schedule_tracker_file = self.cache_dir + "schedule_tracker.pickle"
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"""
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The Push Loop - the push loop periodically (minimal 1/2 of the playlist-grid)
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checks if there is a playlist that should be scheduled at the current time.
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If yes, the temporary liquidsoap playlist gets replaced with the corresponding one,
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then liquidsoap is asked (via telnet) to reload and immediately play it.
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"""
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def push(self, export_source):
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logger = logging.getLogger()
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self.schedule = self.load_schedule()
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playedItems = self.load_schedule_tracker()
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tcoming = time.localtime(time.time() + self.push_ahead)
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tcoming2 = time.localtime(time.time() + self.push_ahead2)
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tnow = time.localtime(time.time())
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str_tcoming_s = "%04d-%02d-%02d-%02d-%02d-%02d" % (tcoming[0], tcoming[1], tcoming[2], tcoming[3], tcoming[4], tcoming[5])
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str_tcoming2_s = "%04d-%02d-%02d-%02d-%02d-%02d" % (tcoming2[0], tcoming2[1], tcoming2[2], tcoming2[3], tcoming2[4], tcoming2[5])
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if self.schedule == None:
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logger.warn('Unable to loop schedule - maybe write in progress?')
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logger.warn('Will try again in next loop.')
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else:
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for pkey in self.schedule:
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playedFlag = (pkey in playedItems) and playedItems[pkey].get("played", 0)
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if pkey[0:19] == str_tcoming_s or (pkey[0:19] < str_tcoming_s and pkey[0:19] > str_tcoming2_s and not playedFlag):
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logger.debug('Preparing to push playlist scheduled at: %s', pkey)
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playlist = self.schedule[pkey]
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ptype = playlist['subtype']
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# We have a match, replace the current playlist and
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# force liquidsoap to refresh.
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if (self.push_liquidsoap(pkey, self.schedule, ptype) == 1):
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logger.debug("Pushed to liquidsoap, updating 'played' status.")
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# Marked the current playlist as 'played' in the schedule tracker
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# so it is not called again in the next push loop.
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# Write changes back to tracker file.
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playedItems[pkey] = playlist
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playedItems[pkey]['played'] = 1
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schedule_tracker = open(self.schedule_tracker_file, "w")
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pickle.dump(playedItems, schedule_tracker)
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schedule_tracker.close()
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logger.debug("Wrote schedule to disk: "+str(json.dumps(playedItems)))
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# Call API to update schedule states
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logger.debug("Doing callback to server to update 'played' status.")
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self.api_client.notify_scheduled_item_start_playing(pkey, self.schedule)
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def push_liquidsoap(self, pkey, schedule, ptype):
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logger = logging.getLogger()
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src = self.cache_dir + str(pkey) + '/list.lsp'
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try:
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if True == os.access(src, os.R_OK):
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logger.debug('OK - Can read playlist file')
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pl_file = open(src, "r")
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file_content = pl_file.read()
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pl_file.close()
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logger.debug('file content: %s' % (file_content))
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playlist = json.loads(file_content)
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#strptime returns struct_time in local time
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#mktime takes a time_struct and returns a floating point
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#gmtime Convert a time expressed in seconds since the epoch to a struct_time in UTC
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#mktime: expresses the time in local time, not UTC. It returns a floating point number, for compatibility with time().
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epoch_start = calendar.timegm(time.gmtime(time.mktime(time.strptime(pkey, '%Y-%m-%d-%H-%M-%S'))))
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#Return the time as a floating point number expressed in seconds since the epoch, in UTC.
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epoch_now = time.time()
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logger.debug("Epoch start: " + str(epoch_start))
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logger.debug("Epoch now: " + str(epoch_now))
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sleep_time = epoch_start - epoch_now;
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if sleep_time < 0:
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sleep_time = 0
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logger.debug('sleeping for %s s' % (sleep_time))
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time.sleep(sleep_time)
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tn = telnetlib.Telnet(LS_HOST, 1234)
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#skip the currently playing song if any.
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logger.debug("source.skip\n")
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tn.write("source.skip\n")
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# Get any extra information for liquidsoap (which will be sent back to us)
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liquidsoap_data = self.api_client.get_liquidsoap_data(pkey, schedule)
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#Sending schedule table row id string.
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logger.debug("vars.pypo_data %s\n"%(str(liquidsoap_data["schedule_id"])))
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tn.write("vars.pypo_data %s\n"%(str(liquidsoap_data["schedule_id"])))
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for item in playlist:
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annotate = str(item['annotate'])
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logger.debug(annotate)
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tn.write('queue.push %s' % (annotate))
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tn.write("\n")
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tn.write("exit\n")
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logger.debug(tn.read_all())
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status = 1
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except Exception, e:
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logger.error('%s', e)
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status = 0
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return status
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def load_schedule(self):
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logger = logging.getLogger()
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schedule = None
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# create the file if it doesnt exist
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if (not os.path.exists(self.schedule_file)):
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logger.debug('creating file ' + self.schedule_file)
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open(self.schedule_file, 'w').close()
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else:
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# load the schedule from cache
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#logger.debug('loading schedule file '+self.schedule_file)
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try:
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schedule_file = open(self.schedule_file, "r")
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schedule = pickle.load(schedule_file)
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schedule_file.close()
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except Exception, e:
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logger.error('%s', e)
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return schedule
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def load_schedule_tracker(self):
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logger = logging.getLogger()
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playedItems = dict()
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# create the file if it doesnt exist
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if (not os.path.exists(self.schedule_tracker_file)):
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logger.debug('creating file ' + self.schedule_tracker_file)
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schedule_tracker = open(self.schedule_tracker_file, 'w')
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pickle.dump(playedItems, schedule_tracker)
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schedule_tracker.close()
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else:
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try:
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schedule_tracker = open(self.schedule_tracker_file, "r")
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playedItems = pickle.load(schedule_tracker)
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schedule_tracker.close()
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except Exception, e:
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logger.error('Unable to load schedule tracker file: %s', e)
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return playedItems
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class PypoFetch:
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def __init__(self):
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self.api_client = api_client.api_client_factory(config)
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self.cue_file = CueFile()
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self.set_export_source('scheduler')
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def set_export_source(self, export_source):
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self.export_source = export_source
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self.cache_dir = config["cache_dir"] + self.export_source + '/'
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self.schedule_file = self.cache_dir + 'schedule.pickle'
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self.schedule_tracker_file = self.cache_dir + "schedule_tracker.pickle"
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"""
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Fetching part of pypo
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- Reads the scheduled entries of a given range (actual time +/- "prepare_ahead" / "cache_for")
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- Saves a serialized file of the schedule
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- playlists are prepared. (brought to liquidsoap format) and, if not mounted via nsf, files are copied
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to the cache dir (Folder-structure: cache/YYYY-MM-DD-hh-mm-ss)
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- runs the cleanup routine, to get rid of unused cashed files
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"""
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def fetch(self, export_source):
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"""
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wrapper script for fetching the whole schedule (in json)
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"""
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logger = logging.getLogger()
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try: os.mkdir(self.cache_dir)
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except Exception, e: pass
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# get schedule
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try:
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while self.get_schedule() != 1:
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logger.warning("failed to read from export url")
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time.sleep(1)
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except Exception, e: logger.error("%s", e)
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# prepare the playlists
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if config["cue_style"] == 'pre':
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try: self.prepare_playlists_cue()
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except Exception, e: logger.error("%s", e)
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elif config["cue_style"] == 'otf':
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try: self.prepare_playlists(self.export_source)
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except Exception, e: logger.error("%s", e)
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# cleanup
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try: self.cleanup(self.export_source)
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except Exception, e: logger.error("%s", e)
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def get_schedule(self):
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logger = logging.getLogger()
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status, response = self.api_client.get_schedule()
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if status == 1:
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logger.info("dump serialized schedule to %s", self.schedule_file)
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schedule = response['playlists']
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try:
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schedule_file = open(self.schedule_file, "w")
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pickle.dump(schedule, schedule_file)
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schedule_file.close()
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except Exception, e:
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logger.critical("Exception %s", e)
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status = 0
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return status
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"""
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Alternative version of playout preparation. Every playlist entry is
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pre-cued if neccessary (cue_in/cue_out != 0) and stored in the
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playlist folder.
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file is eg 2010-06-23-15-00-00/17_cue_10.132-123.321.mp3
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"""
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def prepare_playlists_cue(self):
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logger = logging.getLogger()
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# Load schedule from disk
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schedule = self.load_schedule()
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# Dont do anything if schedule is empty
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if (not schedule):
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logger.debug("Schedule is empty.")
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return
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scheduleKeys = sorted(schedule.iterkeys())
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try:
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for pkey in scheduleKeys:
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logger.info("found playlist at %s", pkey)
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playlist = schedule[pkey]
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# create playlist directory
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try:
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os.mkdir(self.cache_dir + str(pkey))
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except Exception, e:
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pass
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logger.debug('*****************************************')
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logger.debug('pkey: ' + str(pkey))
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logger.debug('cached at : ' + self.cache_dir + str(pkey))
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logger.debug('subtype: ' + str(playlist['subtype']))
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logger.debug('played: ' + str(playlist['played']))
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logger.debug('schedule id: ' + str(playlist['schedule_id']))
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logger.debug('duration: ' + str(playlist['duration']))
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logger.debug('source id: ' + str(playlist['x_ident']))
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logger.debug('*****************************************')
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if int(playlist['played']) == 1:
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logger.info("playlist %s already played / sent to liquidsoap, so will ignore it", pkey)
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elif int(playlist['subtype']) > 0 and int(playlist['subtype']) < 5:
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ls_playlist = self.handle_media_file(playlist, pkey)
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# write playlist file
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plfile = open(self.cache_dir + str(pkey) + '/list.lsp', "w")
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plfile.write(json.dumps(ls_playlist))
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plfile.close()
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logger.info('ls playlist file written to %s', self.cache_dir + str(pkey) + '/list.lsp')
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except Exception, e:
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logger.info("%s", e)
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def handle_media_file(self, playlist, pkey):
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"""
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This handles both remote and local files.
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Returns an updated ls_playlist string.
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"""
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ls_playlist = []
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logger = logging.getLogger()
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for media in playlist['medias']:
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logger.debug("Processing track %s", media['uri'])
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fileExt = os.path.splitext(media['uri'])[1]
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try:
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if str(media['cue_in']) == '0' and str(media['cue_out']) == '0':
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logger.debug('No cue in/out detected for this file')
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dst = "%s%s/%s%s" % (self.cache_dir, str(pkey), str(media['id']), str(fileExt))
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do_cue = False
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else:
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logger.debug('Cue in/out detected')
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dst = "%s%s/%s_cue_%s-%s%s" % \
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(self.cache_dir, str(pkey), str(media['id']), str(float(media['cue_in']) / 1000), str(float(media['cue_out']) / 1000), str(fileExt))
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do_cue = True
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# check if it is a remote file, if yes download
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if media['uri'][0:4] == 'http':
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self.handle_remote_file(media, dst, do_cue)
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else:
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logger.debug("invalid media uri: %s", media['uri'])
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if True == os.access(dst, os.R_OK):
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# check filesize (avoid zero-byte files)
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try: fsize = os.path.getsize(dst)
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except Exception, e:
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logger.error("%s", e)
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fsize = 0
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if fsize > 0:
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pl_entry = \
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'annotate:export_source="%s",media_id="%s",liq_start_next="%s",liq_fade_in="%s",liq_fade_out="%s",schedule_table_id="%s":%s'\
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% (str(media['export_source']), media['id'], 0, str(float(media['fade_in']) / 1000), \
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str(float(media['fade_out']) / 1000), media['row_id'],dst)
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logger.debug(pl_entry)
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"""
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Tracks are only added to the playlist if they are accessible
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on the file system and larger than 0 bytes.
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So this can lead to playlists shorter than expectet.
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(there is a hardware silence detector for this cases...)
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"""
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entry = dict()
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entry['type'] = 'file'
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entry['annotate'] = pl_entry
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ls_playlist.append(entry)
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logger.debug("everything ok, adding %s to playlist", pl_entry)
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else:
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print 'zero-file: ' + dst + ' from ' + media['uri']
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logger.warning("zero-size file - skipping %s. will not add it to playlist", dst)
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else:
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logger.warning("something went wrong. file %s not available. will not add it to playlist", dst)
|
|
|
|
except Exception, e: logger.info("%s", e)
|
|
return ls_playlist
|
|
|
|
|
|
def handle_remote_file(self, media, dst, do_cue):
|
|
logger = logging.getLogger()
|
|
if do_cue == False:
|
|
if os.path.isfile(dst):
|
|
logger.debug("file already in cache: %s", dst)
|
|
else:
|
|
logger.debug("try to download %s", media['uri'])
|
|
self.api_client.get_media(media['uri'], dst)
|
|
|
|
else:
|
|
if os.path.isfile(dst):
|
|
logger.debug("file already in cache: %s", dst)
|
|
|
|
else:
|
|
logger.debug("try to download and cue %s", media['uri'])
|
|
|
|
fileExt = os.path.splitext(media['uri'])[1]
|
|
dst_tmp = config["tmp_dir"] + "".join([random.choice(string.letters) for i in xrange(10)]) + fileExt
|
|
self.api_client.get_media(media['uri'], dst_tmp)
|
|
|
|
# cue
|
|
logger.debug("STARTING CUE")
|
|
debugDst = self.cue_file.cue(dst_tmp, dst, float(media['cue_in']) / 1000, float(media['cue_out']) / 1000)
|
|
logger.debug(debugDst)
|
|
logger.debug("END CUE")
|
|
|
|
if True == os.access(dst, os.R_OK):
|
|
try: fsize = os.path.getsize(dst)
|
|
except Exception, e:
|
|
logger.error("%s", e)
|
|
fsize = 0
|
|
|
|
if fsize > 0:
|
|
logger.debug('try to remove temporary file: %s' + dst_tmp)
|
|
try: os.remove(dst_tmp)
|
|
except Exception, e:
|
|
logger.error("%s", e)
|
|
|
|
else:
|
|
logger.warning('something went wrong cueing: %s - using uncued file' + dst)
|
|
try: os.rename(dst_tmp, dst)
|
|
except Exception, e:
|
|
logger.error("%s", e)
|
|
|
|
|
|
def cleanup(self, export_source):
|
|
"""
|
|
Cleans up folders in cache_dir. Look for modification date older than "now - CACHE_FOR"
|
|
and deletes them.
|
|
"""
|
|
logger = logging.getLogger()
|
|
|
|
offset = 3600 * int(config["cache_for"])
|
|
now = time.time()
|
|
|
|
for r, d, f in os.walk(self.cache_dir):
|
|
for dir in d:
|
|
try:
|
|
timestamp = time.mktime(time.strptime(dir, "%Y-%m-%d-%H-%M-%S"))
|
|
if (now - timestamp) > offset:
|
|
try:
|
|
logger.debug('trying to remove %s - timestamp: %s', os.path.join(r, dir), timestamp)
|
|
shutil.rmtree(os.path.join(r, dir))
|
|
except Exception, e:
|
|
logger.error("%s", e)
|
|
pass
|
|
else:
|
|
logger.info('sucessfully removed %s', os.path.join(r, dir))
|
|
except Exception, e:
|
|
print e
|
|
logger.error("%s", e)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
print '###########################################'
|
|
print '# *** pypo *** #'
|
|
print '# Liquidsoap + External Scheduler #'
|
|
print '# Playout System #'
|
|
print '###########################################'
|
|
|
|
# initialize
|
|
g = Global()
|
|
g.selfcheck()
|
|
|
|
pp = PypoPush()
|
|
pf = PypoFetch()
|
|
|
|
while True:
|
|
logger = logging.getLogger()
|
|
loops = 0
|
|
|
|
if options.test:
|
|
g.test_api()
|
|
sys.exit()
|
|
|
|
while options.fetch_scheduler:
|
|
try: pf.fetch('scheduler')
|
|
except Exception, e:
|
|
print e
|
|
sys.exit()
|
|
|
|
if (loops%2 == 0):
|
|
logger.info("heartbeat")
|
|
loops += 1
|
|
time.sleep(POLL_INTERVAL)
|
|
|
|
while options.push_scheduler:
|
|
try: pp.push('scheduler')
|
|
except Exception, e:
|
|
print 'PUSH ERROR!! WILL EXIT NOW:('
|
|
print e
|
|
sys.exit()
|
|
|
|
if (loops%60 == 0):
|
|
logger.info("heartbeat")
|
|
|
|
loops += 1
|
|
time.sleep(PUSH_INTERVAL)
|
|
|
|
while options.check:
|
|
try: g.check_schedule()
|
|
except Exception, e:
|
|
print e
|
|
sys.exit()
|
|
|
|
while options.cleanup:
|
|
try: pf.cleanup('scheduler')
|
|
except Exception, e:
|
|
print e
|
|
sys.exit()
|
|
sys.exit()
|