# python-musicpd: Python MPD client library
# Copyright (C) 2008-2010 J. Alexander Treuman <jat@spatialrift.net>
-# Copyright (C) 2012-2014 Kaliko Jack <kaliko@azylum.org>
+# Copyright (C) 2012-2018 Kaliko Jack <kaliko@azylum.org>
#
# python-musicpd is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# You should have received a copy of the GNU Lesser General Public License
# along with python-musicpd. If not, see <http://www.gnu.org/licenses/>.
-# pylint: disable=C0111
+# pylint: disable=missing-docstring
import socket
+import os
+
+from functools import wraps
HELLO_PREFIX = "OK MPD "
ERROR_PREFIX = "ACK "
SUCCESS = "OK"
NEXT = "list_OK"
-VERSION = '0.4.2'
+VERSION = '0.4.3'
+
+
+def iterator_wrapper(func):
+ """Decorator handling iterate option"""
+ @wraps(func)
+ def decorated_function(instance, *args, **kwargs):
+ generator = func(instance, *args, **kwargs)
+ if not instance.iterate:
+ return list(generator)
+ instance._iterating = True
+ def iterator(gen):
+ try:
+ for item in gen:
+ yield item
+ finally:
+ instance._iterating = False
+ return iterator(generator)
+ return decorated_function
class MPDError(Exception):
except (TypeError, ValueError):
raise CommandError('Not a tuple of int')
-
class _NotConnected:
def __getattr__(self, attr):
return self._dummy
raise ConnectionError("Not connected")
class MPDClient:
+ """MPDClient instance will look for ``MPD_HOST``/``MPD_PORT``/``XDG_RUNTIME_DIR`` environment
+ variables and set instance attribute ``host``, ``port`` and ``pwd``
+ accordingly.
+
+ Then :py:obj:`musicpd.MPDClient.connect` will use ``host`` and ``port`` as defaults if not provided as args.
+
+ Cf. :py:obj:`musicpd.MPDClient.connect` for details.
+
+ >>> from os inport environ
+ >>> environ['MPD_HOST'] = 'pass@mpdhost'
+ >>> cli = musicpd.MPDClient()
+ >>> cli.pwd == environ['MPD_HOST'].split('@')[0]
+ True
+ >>> cli.host == environ['MPD_HOST'].split('@')[1]
+ True
+ >>> # cli.connect() will use host/port as set in MPD_HOST/MPD_PORT
+ """
+
def __init__(self):
self.iterate = False
self._reset()
"readmessages": self._fetch_messages,
"sendmessage": self._fetch_nothing,
}
+ self._get_envvars()
+
+ def _get_envvars(self):
+ """
+ Retrieve MPD env. var. to overrides "localhost:6600"
+ Use MPD_HOST/MPD_PORT if set
+ else use MPD_HOST=${XDG_RUNTIME_DIR:-/run/}/mpd/socket if file exists
+ """
+ self.host = 'localhost'
+ self.pwd = None
+ self.port = os.environ.get('MPD_PORT', '6600')
+ mpd_host_env = os.environ.get('MPD_HOST')
+ if mpd_host_env:
+ # If password is set:
+ # mpd_host_env = ['pass', 'host'] because MPD_HOST=pass@host
+ mpd_host_env = mpd_host_env.split('@')
+ mpd_host_env.reverse()
+ self.host = mpd_host_env[0]
+ if len(mpd_host_env) > 1 and mpd_host_env[1]:
+ self.pwd = mpd_host_env[1]
+ else:
+ # Is socket there
+ xdg_runtime_dir = os.environ.get('XDG_RUNTIME_DIR', '/run')
+ rundir = os.path.join(xdg_runtime_dir, 'mpd/socket')
+ if os.path.exists(rundir):
+ self.host = rundir
def __getattr__(self, attr):
if attr == 'send_noidle': # have send_noidle to cancel idle as well as noidle
self._command_list = None
self._fetch_nothing()
- def _iterator_wrapper(self, iterator):
- try:
- for item in iterator:
- yield item
- finally:
- self._iterating = False
-
- def _wrap_iterator(self, iterator):
- if not self.iterate:
- return list(iterator)
- self._iterating = True
- return self._iterator_wrapper(iterator)
-
def _fetch_nothing(self):
line = self._read_line()
if line is not None:
return
return pairs[0][1]
+ @iterator_wrapper
def _fetch_list(self):
- return self._wrap_iterator(self._read_list())
+ return self._read_list()
+ @iterator_wrapper
def _fetch_playlist(self):
- return self._wrap_iterator(self._read_playlist())
+ return self._read_playlist()
def _fetch_object(self):
objs = list(self._read_objects())
return {}
return objs[0]
+ @iterator_wrapper
def _fetch_objects(self, delimiters):
- return self._wrap_iterator(self._read_objects(delimiters))
+ return self._read_objects(delimiters)
def _fetch_changes(self):
return self._fetch_objects(["cpos"])
def _fetch_neighbors(self):
return self._fetch_objects(["neighbor"])
+ @iterator_wrapper
def _fetch_command_list(self):
- return self._wrap_iterator(self._read_command_list())
+ return self._read_command_list()
def _hello(self):
line = self._rfile.readline()
self.mpd_version = line[len(HELLO_PREFIX):].strip()
def _reset(self):
- # pylint: disable=w0201
self.mpd_version = None
self._iterating = False
self._pending = []
self._write_command("noidle")
return self._fetch_list()
- def connect(self, host, port):
+ def connect(self, host=None, port=None):
+ """Connects the MPD server
+
+ :param str host: hostname, IP or FQDN (defaults to `localhost` or socket, see below for details)
+ :param str port: port number (defaults to 6600)
+
+ The connect method honors MPD_HOST/MPD_PORT environment variables.
+
+ .. note:: Default host/port
+
+ If host evaluate to :py:obj:`False`
+ * use ``MPD_HOST`` env. var. if set, extract password if present,
+ * else looks for a existing file in ``${XDG_RUNTIME_DIR:-/run/}/mpd/socket``
+ * else set host to ``localhost``
+
+ If port evaluate to :py:obj:`False`
+ * if ``MPD_PORT`` env. var. is set, use it for port
+ * else use ``6600``
+ """
+ if not host:
+ host = self.host
+ if not port:
+ port = self.port
if self._sock is not None:
raise ConnectionError("Already connected")
if host.startswith("/"):
raise
def disconnect(self):
+ """Closes the MPD connection.
+ The client closes the actual socket, it does not use the
+ 'close' request from MPD protocol (as suggested in documentation).
+ """
if hasattr(self._rfile, 'close'):
self._rfile.close()
if hasattr(self._wfile, 'close'):
def escape(text):
return text.replace("\\", "\\\\").replace('"', '\\"')
-
# vim: set expandtab shiftwidth=4 softtabstop=4 textwidth=79:
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