forked from Screenly/Anthias
-
Notifications
You must be signed in to change notification settings - Fork 6
/
viewer.py
executable file
·338 lines (260 loc) · 10.6 KB
/
viewer.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from datetime import datetime, timedelta
from os import path, getenv, utime
from platform import machine
from random import shuffle
from requests import get as req_get
from time import sleep
from json import load as json_load
from signal import signal, SIGUSR1, SIGUSR2
import logging
import sh
from settings import settings
import html_templates
from utils import url_fails
import db
import assets_helper
__author__ = "WireLoad Inc"
__copyright__ = "Copyright 2012-2015, WireLoad Inc"
__license__ = "Dual License: GPLv2 and Commercial License"
SPLASH_DELAY = 60 # secs
EMPTY_PL_DELAY = 5 # secs
BLACK_PAGE = '/tmp/screenly_html/black_page.html'
WATCHDOG_PATH = '/tmp/screenly.watchdog'
SCREENLY_HTML = '/tmp/screenly_html/'
LOAD_SCREEN = '/screenly/loading.jpg' # relative to $HOME
UZBLRC = '/screenly/misc/uzbl.rc' # relative to $HOME
INTRO = '/screenly/intro-template.html'
current_browser_url = None
browser = None
VIDEO_TIMEOUT = 20 # secs
HOME = None
arch = None
db_conn = None
def sigusr1(signum, frame):
"""
The signal interrupts sleep() calls, so the currently playing web or image asset is skipped.
omxplayer is killed to skip any currently playing video assets.
"""
logging.info('USR1 received, skipping.')
sh.killall('omxplayer.bin', _ok_code=[1])
def sigusr2(signum, frame):
"""Reload settings"""
logging.info("USR2 received, reloading settings.")
load_settings()
class Scheduler(object):
def __init__(self, *args, **kwargs):
logging.debug('Scheduler init')
self.assets = []
self.deadline = None
self.index = 0
self.counter = 0
self.update_playlist()
def get_next_asset(self):
logging.debug('get_next_asset')
self.refresh_playlist()
logging.debug('get_next_asset after refresh')
if not self.assets:
return None
idx = self.index
self.index = (self.index + 1) % len(self.assets)
logging.debug('get_next_asset counter %s returning asset %s of %s', self.counter, idx + 1, len(self.assets))
if settings['shuffle_playlist'] and self.index == 0:
self.counter += 1
return self.assets[idx]
def refresh_playlist(self):
logging.debug('refresh_playlist')
time_cur = datetime.utcnow()
logging.debug('refresh: counter: (%s) deadline (%s) timecur (%s)', self.counter, self.deadline, time_cur)
if self.get_db_mtime() > self.last_update_db_mtime:
logging.debug('updating playlist due to database modification')
self.update_playlist()
elif settings['shuffle_playlist'] and self.counter >= 5:
self.update_playlist()
elif self.deadline and self.deadline <= time_cur:
self.update_playlist()
def update_playlist(self):
logging.debug('update_playlist')
self.last_update_db_mtime = self.get_db_mtime()
(new_assets, new_deadline) = generate_asset_list()
if new_assets == self.assets and new_deadline == self.deadline:
# If nothing changed, don't disturb the current play-through.
return
self.assets, self.deadline = new_assets, new_deadline
self.counter = 0
# Try to keep the same position in the play list. E.g. if a new asset is added to the end of the list, we
# don't want to start over from the beginning.
self.index = self.index % len(self.assets) if self.assets else 0
logging.debug('update_playlist done, count %s, counter %s, index %s, deadline %s', len(self.assets), self.counter, self.index, self.deadline)
def get_db_mtime(self):
# get database file last modification time
try:
return path.getmtime(settings['database'])
except:
return 0
def generate_asset_list():
logging.info('Generating asset-list...')
playlist = assets_helper.get_playlist(db_conn)
deadline = sorted([asset['end_date'] for asset in playlist])[0] if len(playlist) > 0 else None
logging.debug('generate_asset_list deadline: %s', deadline)
if settings['shuffle_playlist']:
shuffle(playlist)
return playlist, deadline
def watchdog():
"""Notify the watchdog file to be used with the watchdog-device."""
if not path.isfile(WATCHDOG_PATH):
open(WATCHDOG_PATH, 'w').close()
else:
utime(WATCHDOG_PATH, None)
def load_browser(url=None):
global browser, current_browser_url
logging.info('Loading browser...')
if browser:
logging.info('killing previous uzbl %s', browser.pid)
browser.process.kill()
if url is not None:
current_browser_url = url
# --config=- read commands (and config) from stdin
# --print-events print events to stdout
browser = sh.Command('uzbl-browser')(print_events=True, config='-', uri=current_browser_url, _bg=True)
logging.info('Browser loading %s. Running as PID %s.', current_browser_url, browser.pid)
uzbl_rc = 'set ssl_verify = {}\n'.format('1' if settings['verify_ssl'] else '0')
with open(HOME + UZBLRC) as f: # load uzbl.rc
uzbl_rc = f.read() + uzbl_rc
browser_send(uzbl_rc)
def browser_send(command, cb=lambda _: True):
if not (browser is None) and browser.process.alive:
while not browser.process._pipe_queue.empty(): # flush stdout
browser.next()
browser.process.stdin.put(command + '\n')
while True: # loop until cb returns True
if cb(browser.next()):
break
else:
logging.info('browser found dead, restarting')
load_browser()
def browser_clear(force=False):
"""Load a black page. Default cb waits for the page to load."""
browser_url('file://' + BLACK_PAGE, force=force, cb=lambda buf: 'LOAD_FINISH' in buf and BLACK_PAGE in buf)
def browser_url(url, cb=lambda _: True, force=False):
global current_browser_url
if url == current_browser_url and not force:
logging.debug('Already showing %s.', current_browser_url)
# For some reason this invokes a weird black screen issue
# when going image -> image.
# logging.debug('Already showing %s, reloading it.', current_browser_url)
# browser_send('reload full')
else:
current_browser_url = url
browser_send('uri ' + current_browser_url, cb=cb)
logging.info('current url is %s', current_browser_url)
def view_image(uri):
browser_clear()
browser_send('js window.setimg("{0}")'.format(uri), cb=lambda b: 'COMMAND_EXECUTED' in b and 'setimg' in b)
def view_video(uri, duration):
logging.debug('Displaying video %s for %s ', uri, duration)
if arch in ('armv6l', 'armv7l'):
player_args = ['omxplayer', uri]
player_kwargs = {'o': settings['audio_output'], '_bg': True, '_ok_code': [0, 124]}
player_kwargs['_ok_code'] = [0, 124]
else:
player_args = ['mplayer', uri, '-nosound']
player_kwargs = {'_bg': True}
if duration and duration != 'N/A':
player_args = ['timeout', VIDEO_TIMEOUT + int(duration.split('.')[0])] + player_args
run = sh.Command(player_args[0])(*player_args[1:], **player_kwargs)
browser_clear(force=True)
while run.process.alive:
watchdog()
sleep(1)
if run.exit_code == 124:
logging.error('omxplayer timed out')
def check_update():
"""
Check if there is a later version of Screenly-OSE
available. Only do this update once per day.
Return True if up to date was written to disk,
False if no update needed and None if unable to check.
"""
sha_file = path.join(settings.get_configdir(), 'latest_screenly_sha')
if path.isfile(sha_file):
sha_file_mtime = path.getmtime(sha_file)
last_update = datetime.fromtimestamp(sha_file_mtime)
else:
last_update = None
logging.debug('Last update: %s' % str(last_update))
if last_update is None or last_update < (datetime.now() - timedelta(days=1)):
if not url_fails('http://stats.screenlyapp.com'):
latest_sha = req_get('http://stats.screenlyapp.com/latest')
if latest_sha.status_code == 200:
with open(sha_file, 'w') as f:
f.write(latest_sha.content.strip())
return True
else:
logging.debug('Received non 200-status')
return
else:
logging.debug('Unable to retreive latest SHA')
return
else:
return False
def load_settings():
"""Load settings and set the log level."""
settings.load()
logging.getLogger().setLevel(logging.DEBUG if settings['debug_logging'] else logging.INFO)
def asset_loop(scheduler):
check_update()
asset = scheduler.get_next_asset()
if asset is None:
logging.info('Playlist is empty. Sleeping for %s seconds', EMPTY_PL_DELAY)
view_image(HOME + LOAD_SCREEN)
sleep(EMPTY_PL_DELAY)
elif path.isfile(asset['uri']) or not url_fails(asset['uri']):
name, mime, uri = asset['name'], asset['mimetype'], asset['uri']
logging.info('Showing asset %s (%s)', name, mime)
logging.debug('Asset URI %s', uri)
watchdog()
if 'image' in mime:
view_image(uri)
elif 'web' in mime:
# FIXME If we want to force periodic reloads of repeated web assets, force=True could be used here.
# See e38e6fef3a70906e7f8739294ffd523af6ce66be.
browser_url(uri)
elif 'video' in mime:
view_video(uri, asset['duration'])
else:
logging.error('Unknown MimeType %s', mime)
if 'image' in mime or 'web' in mime:
duration = int(asset['duration'])
logging.info('Sleeping for %s', duration)
sleep(duration)
else:
logging.info('Asset %s at %s is not available, skipping.', asset['name'], asset['uri'])
sleep(0.5)
def setup():
global HOME, arch, db_conn
HOME = getenv('HOME', '/home/pi')
arch = machine()
signal(SIGUSR1, sigusr1)
signal(SIGUSR2, sigusr2)
load_settings()
db_conn = db.conn(settings['database'])
sh.mkdir(SCREENLY_HTML, p=True)
html_templates.black_page(BLACK_PAGE)
def main():
setup()
url = 'http://{0}:{1}/splash_page'.format(settings.get_listen_ip(), settings.get_listen_port()) if settings['show_splash'] else 'file://' + BLACK_PAGE
load_browser(url=url)
if settings['show_splash']:
sleep(SPLASH_DELAY)
scheduler = Scheduler()
logging.debug('Entering infinite loop.')
while True:
asset_loop(scheduler)
if __name__ == "__main__":
try:
main()
except:
logging.exception("Viewer crashed.")
raise