def base64_encode_image(filename):
""":return the base64 encoded image if filename was a image else None"""
try:
imgfile = open(filename, "rb")
img = imgfile.read(1024)
except IOError as err:
log("Artwork '{0}' won't be displayed: {2}".
format(filename, err.message), min_verbosity=1, error=True)
return None
mimetype = APP.magic.buffer(img).lower()
mimere = re.compile(r'(?P<mimetype>image/(png|jpeg|jpg|bmp|gif)).*')
mimes = mimere.findall(mimetype)
if len(mimes) == 1:
mimetype = mimes[0][0]
img += imgfile.read() # read remeaning file
imgfile.close()
imgstr = str(base64.b64encode(img).decode('ascii'))
imgstr = imgstr.replace('\n', '')
return "data:{mime};base64,{base64}".format(
mime=mimetype, base64=imgstr)
else:
log("Artwork '{0}' rejected: invalid mimetype '{1}'".
format(filename, mimetype), min_verbosity=1, error=True)
imgfile.close()
return None
def open(self):
"""when a client connects, add this socket to list"""
APP.clients.append(self)
mpris_prop_change_handler()
self.send_status()
log("WebSocket opened. {0} child(s) connected".
format(len(APP.clients)), min_verbosity=1)
def glib_loop_thread(self):
"""
runs the GLib main loop to get notified about player status changes
"""
self.mloop.run()
log("GLib loop exited", min_verbosity=2)
thread.exit_thread()
def __init__(self, prop_changed_handler):
"""
:param properties_changed_handler: a function that will be executed on
status changes like `def handler(self, *args, **kw)`
"""
# initialize DBus:
DBusGMainLoop(set_as_default=True)
self.prop_changed_handler = prop_changed_handler
self.try_connect()
if not self.player:
log("No MPRIS player available. " +
"Please start your favourite music player with MPRIS support.",
min_verbosity=0, error=True)
self.mloop = gi.repository.GLib.MainLoop()
thread.start_new_thread(self.glib_loop_thread, ())
thread.start_new_thread(self.check_connection_thread, ())
signal.signal(signal.SIGINT, self.sigint_handler)
def check_connection_thread(self):
"""
checks if the currently connected player is connected and
tries to reconnect if not
"""
while True:
time.sleep(5)
try:
self.player.CanControl
# -> AttributeError when None
# -> DBusException when not connected anymore
# I found no other method to test this
# -> better sorry than safe
log("Player is still connected", min_verbosity=5)
# except AttributeError, dbus.exceptions.DBusException:
except (AttributeError, dbus.exceptions.DBusException):
log("Player is NOT connected", min_verbosity=5)
self.try_connect()
self.prop_changed_handler()
def main():
"""the main function starts the server"""
global APP
APP = make_app()
APP.args = parse_args()
APP.clients = [] # global list of all connected websocket clients
APP.mpris_wrapper = MPRISWrapper(mpris_prop_change_handler)
log("Loading magic file for mimetypes. Please wait.", min_verbosity=1)
APP.magic = magic.open(magic.MAGIC_MIME_TYPE)
APP.magic.load()
log("Loading finished.", min_verbosity=2)
APP.listen(APP.args.port, address=APP.args.ip)
log("App will listen on http://{ip}:{port}".format(
ip=APP.args.ip, port=APP.args.port))
tornado.ioloop.IOLoop.current().start()
def try_connect(self):
"""
Sets self.player to a player and sets the prop_changed_handler
if there is a mpris player on dbus or sets self.player to None
"""
log("Try to connect to player", min_verbosity=4)
uris = list(mpris2.get_players_uri())
if len(uris):
self.player = mpris2.Player(dbus_interface_info={
'dbus_uri': uris[0] # connects to the first player
})
self.player.PropertiesChanged = self.prop_changed_handler
log("Connected to player", min_verbosity=4)
else:
log("Can't connect. No MPRIS player available",
min_verbosity=4, error=True)
self.player = None
def mpris_prop_change_handler(*args, **kw):
"""function will be executed on mpris player property changes"""
meta = {
"titles": {
"current": APP.mpris_wrapper.get_current_title(),
"next": APP.mpris_wrapper.get_next_title(),
},
"trackMetadata": APP.mpris_wrapper.get_current_metadata(),
"status": APP.mpris_wrapper.get_playback_status(),
"player": {
"canControl": APP.mpris_wrapper.get_can_control(),
"canGoNext": APP.mpris_wrapper.get_can_go_next(),
"canGoPrevious": APP.mpris_wrapper.get_can_go_previous(),
"canPlay": APP.mpris_wrapper.get_can_play(),
"canPause": APP.mpris_wrapper.get_can_pause(),
},
"volume": APP.mpris_wrapper.volume,
}
if 'trackMetadata' in meta.keys() and \
'artUri' in meta['trackMetadata'].keys() and \
meta['trackMetadata']['artUri']:
arturi = meta['trackMetadata']['artUri']
arturi = arturi.strip().replace("file://", '')
if arturi and os.path.isfile(arturi):
image = base64_encode_image(arturi)
if image:
meta['trackMetadata']['art'] = image
else:
log("Artwork '{0}' won't be displayed: could not open file".
format(arturi), min_verbosity=1, error=True)
else:
log("Artwork '{0}' won't be displayed: file not found".
format(arturi), min_verbosity=3, error=True)
del meta['trackMetadata']['artUri']
else:
log("Track has no Artwork", min_verbosity=4)
APP.meta_status = meta
for client in APP.clients:
client.send_status()
def on_message(self, message):
"""new message received"""
try:
msg = json.loads(message)
except ValueError:
log("Client sent an invalid message: {0}".format(message),
error=True)
return
if 'action' not in msg:
log("invalid message received from client: '{0}'".
format(str(msg)),
min_verbosity=2, error=True)
return
elif msg['action'] == 'backward':
APP.mpris_wrapper.previous()
elif msg['action'] == 'play':
APP.mpris_wrapper.play()
elif msg['action'] == 'pause':
APP.mpris_wrapper.pause()
elif msg['action'] == 'stop':
APP.mpris_wrapper.stop()
elif msg['action'] == 'forward':
APP.mpris_wrapper.next()
elif msg['action'] == 'volume':
if 'value' in msg.keys():
try:
APP.mpris_wrapper.volume = float(msg['value'])
except ValueError as err:
log(("Invalid value '{0}' for volume " +
"in message from client: {1}").
format(msg['value'], err.message),
min_verbosity=1, error=True)
else:
log("Missing value for action 'volume' in message from client",
min_verbosity=1, error=True)
else:
log("invalid action '{0}' received from client".
format(msg['action']),
min_verbosity=1, error=True)
log("received: " + message, min_verbosity=2)
def on_close(self):
"""the client of this socket leaved, remove this socket from list"""
APP.clients.remove(self)
log("WebSocket closed. {0} child(s) connected".
format(len(APP.clients)), min_verbosity=1)
def send_status(self):
"""sends the current and next tracks to the client"""
self.write_message(json.dumps(APP.meta_status), binary=False)
log("send: {0}".format(APP.meta_status), min_verbosity=3)
def sigint_handler(self, sig, frame):
"""Stop on sigint (Ctrl+C)"""
log("Signal {0} in frame {1} caught".format(sig, frame),
min_verbosity=1)
self.mloop.quit()
exit(0)