/usr/lib/python2.7/dist-packages/quodlibet/remote.py is in exfalso 3.9.1-1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | # -*- coding: utf-8 -*-
# Copyright 2014 Christoph Reiter
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation
import os
from senf import path2fsn, fsn2bytes, bytes2fsn, fsnative
from quodlibet.util import fifo, print_w
from quodlibet import get_user_dir
try:
from quodlibet.util import winpipe
except ImportError:
winpipe = None
class RemoteError(Exception):
pass
class RemoteBase(object):
"""A thing for communicating with existing instances of ourself."""
def __init__(self, app, cmd_registry):
"""
Args:
app (Application)
cmd_registry (CommandRegistry)
"""
raise NotImplemented
@classmethod
def remote_exists(self):
"""See if another instance exists
Returns:
bool
"""
raise NotImplemented
@classmethod
def send_message(cls, message):
"""Send data to the existing instance if possible and returns
a response.
Args:
message (fsnative)
Returns:
fsnative or None
Raises:
RemoteError: in case the message couldn't be send or
there was no response.
"""
raise NotImplemented
def start(self):
"""Start the listener for other instances.
Raises:
RemoteError: in case another instance is already listening.
"""
raise NotImplemented
def stop(self):
"""Stop the listener for other instances"""
raise NotImplemented
class QuodLibetWinRemote(RemoteBase):
_NAME = "quodlibet"
def __init__(self, app, cmd_registry):
self._app = app
self._cmd_registry = cmd_registry
self._server = winpipe.NamedPipeServer(self._NAME, self._callback)
@classmethod
def remote_exists(cls):
return winpipe.pipe_exists(cls._NAME)
@classmethod
def send_message(cls, message):
data = fsn2bytes(path2fsn(message), "utf-8")
try:
winpipe.write_pipe(cls._NAME, data)
except EnvironmentError as e:
raise RemoteError(e)
def start(self):
try:
self._server.start()
except winpipe.NamedPipeServerError as e:
raise RemoteError(e)
def stop(self):
self._server.stop()
def _callback(self, data):
message = bytes2fsn(data, "utf-8")
self._cmd_registry.handle_line(self._app, message)
class QuodLibetUnixRemote(RemoteBase):
_FIFO_NAME = "control"
_PATH = os.path.join(get_user_dir(), _FIFO_NAME)
def __init__(self, app, cmd_registry):
self._app = app
self._cmd_registry = cmd_registry
self._fifo = fifo.FIFO(self._PATH, self._callback)
@classmethod
def remote_exists(cls):
return fifo.fifo_exists(cls._PATH)
@classmethod
def send_message(cls, message):
assert isinstance(message, fsnative)
try:
return fifo.write_fifo(cls._PATH, fsn2bytes(message, None))
except EnvironmentError as e:
raise RemoteError(e)
def start(self):
try:
self._fifo.open()
except fifo.FIFOError as e:
raise RemoteError(e)
def stop(self):
self._fifo.destroy()
def _callback(self, data):
try:
messages = list(fifo.split_message(data))
except ValueError:
print_w("invalid message: %r" % data)
return
for command, path in messages:
command = bytes2fsn(command, None)
response = self._cmd_registry.handle_line(self._app, command)
if path is not None:
path = bytes2fsn(path, None)
with open(path, "wb") as h:
if response is not None:
assert isinstance(response, fsnative)
h.write(fsn2bytes(response, None))
if os.name == "nt":
Remote = QuodLibetWinRemote
else:
Remote = QuodLibetUnixRemote
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