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© 2006-2013 Andrew Cooke (site) / post authors (content).

Calling SqueezeCenter CLI from Python 3

From: andrew cooke <andrew@...>

Date: Wed, 23 Mar 2011 21:02:50 -0300

There's a library (or two?) in development that do this for Python 2 (I
submitted a 2 to 3 patch at
http://code.google.com/p/pysqueezecenter/issues/detail?id=13), but really it's
so simple you can do it in a module of your own.  Here's a class I wrote that
calls a few methods:


class SqueezeServer():
    
    def __init__(self, address=None, port=None, player=None):
        LOG.debug('Connecting to {0}:{1}.'.format(address, port))
        self.__telnet = Telnet(address, port) 
        LOG.debug('Connected.')
        self.__pid = self.player_ids[player]
        LOG.debug('Found player {0} at {1}'.format(player, self.__pid))
    
    @property
    def player_ids(self):
        '''A map from payer names to IDs (MAC addresses)'''
        ids = {}
        for i in range(int(self.__global('player count ?'))):
            id = self.__global('player id {0} ?'.format(i))
            name = self.__global('player name {0} ?'.format(i))
            ids[name] = id
        return ids
    
    @property
    def playlist_tracks(self):
        '''Number of tracks in current playlist'''
        return int(self.__player('playlist tracks ?'))
    
    @property
    def playlist_index(self):
        '''Index of current track in playlist'''
        return int(self.__player('playlist index ?'))
    
    @property
    def playlist_remaining(self):
        '''Includes current track, so 0 when silent'''
        return self.playlist_tracks - self.playlist_index 
    
    def __global(self, command):
        '''Execute a command'''
        command = command.encode('utf8')
        response = command[:-1] + b'([^\n]*)\n'
        LOG.debug('Sending {0}'.format(command))
        self.__telnet.write(command + b'\n')
        (_, match, _) = self.__telnet.expect([response])
        result = unquote(match.groups(1)[0].decode('utf8'), 'utf8')
        LOG.debug('Received: {0}'.format(result))
        return result
    
    def __player(self, command):
        '''Execute a command targetting a particular player'''
        return self.__global(quote(self.__pid) + ' ' + command)


Andrew

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