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#!/usr/bin/env python
# Copyright (C) 2012-2013 Aleksey Lim
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
import errno
import signal
import locale
import gettext
import logging
from os.path import join, abspath, exists
from sugar_network.toolkit import coroutine
coroutine.inject()
import sugar_network_webui as webui
from sugar_network import db, toolkit, client, node
from sugar_network.client.routes import ClientRoutes
from sugar_network.client.injector import Injector
from sugar_network.client.model import Volume
from sugar_network.client.auth import BasicCreds, SugarCreds
from sugar_network.toolkit.router import Router, Request, Response
from sugar_network.toolkit.coroutine import this
from sugar_network.toolkit import mountpoints, printf, application
from sugar_network.toolkit import Option
gettext.textdomain('sugar-network')
class Application(application.Daemon):
def __init__(self, **kwargs):
application.Daemon.__init__(self, **kwargs)
self.jobs = coroutine.Pool()
new_root = (client.local_root.value != client.local_root.default)
client.local_root.value = abspath(client.local_root.value)
if new_root:
application.logdir.value = join(client.local_root.value, 'log')
else:
application.logdir.value = client.profile_path('logs')
if not exists(toolkit.cachedir.value):
os.makedirs(toolkit.cachedir.value)
application.rundir.value = join(client.local_root.value, 'run')
coroutine.signal(signal.SIGCHLD, self.__SIGCHLD_cb)
@application.command(
'index local Sugar Network database')
def index(self):
if self.check_for_instance():
printf.info('%s already started, no need in index', self.name)
return
printf.info('Index database in %r', client.local_root.value)
volume = Volume(client.path())
try:
volume.populate()
finally:
volume.close()
@application.command(hidden=True)
def graceful_start(self):
"""Restart existing process if it was started in different environment.
This command makes sense only for Sugar Network activity when it is
required avoid restarting existing sugar-network-client. But, restart
process if it was started in different Sugar session.
"""
pid = self.check_for_instance()
if pid:
run_environ = _read_environ(pid)
if os.environ.get('DISPLAY') == run_environ.get('DISPLAY') and \
os.environ.get('DBUS_SESSION_BUS_ADDRESS') == \
run_environ.get('DBUS_SESSION_BUS_ADDRESS'):
printf.info('%s already started in current environment',
self.name)
return
application.replace.value = True
self.cmd_start()
@application.command(hidden=True)
def debug(self):
printf.info('Use "start --foreground" command instead')
application.foreground.value = True
self.cmd_start()
def run(self):
this.injector = Injector(client.path('cache'),
client.cache_lifetime.value, client.cache_limit.value,
client.cache_limit_percent.value)
volume = Volume(client.path())
if client.login.value and client.password.value:
creds = BasicCreds(client.login.value, client.password.value)
elif client.keyfile.value:
creds = SugarCreds(client.keyfile.value)
else:
raise RuntimeError('No credentials specified')
routes = ClientRoutes(volume, creds)
router = Router(routes, allow_spawn=True)
logging.info('Listening for IPC requests on %s port',
client.ipc_port.value)
server = coroutine.WSGIServer(
('localhost', client.ipc_port.value), router)
self.jobs.spawn(server.serve_forever)
coroutine.dispatch()
self.accept()
def final_start():
volume.populate()
if webui.webui.value:
host = (webui.webui_host.value, webui.webui_port.value)
logging.info('Start Web server on %s:%s', *host)
webui_app = webui.get_app(
lambda **kwargs: router.call(Request(**kwargs),
Response()),
'http://localhost:%s' % client.ipc_port.value)
server = coroutine.WSGIServer(host, webui_app)
self.jobs.spawn(server.serve_forever)
if client.mounts_root.value:
mounts_root = abspath(client.mounts_root.value)
if not exists(mounts_root):
os.makedirs(mounts_root)
self.jobs.spawn(mountpoints.monitor, mounts_root)
if client.cache_timeout.value:
self.jobs.spawn(self._recycle_cache, routes)
api_url = None if client.discover_node.value else client.api.value
routes.connect(api_url)
def delayed_start(event=None):
for __ in routes.subscribe(event='delayed-start'):
break
logging.info('Proceed delayed start')
final_start()
if client.delayed_start.value:
self.jobs.spawn(delayed_start)
else:
final_start()
try:
self.jobs.join()
except KeyboardInterrupt:
toolkit.exception('%s interrupted', self.name)
finally:
self.jobs.kill()
routes.close()
def shutdown(self):
self.jobs.kill()
def _recycle_cache(self, routes):
while True:
logging.debug('Start cache recycling in %d seconds',
client.cache_timeout.value)
coroutine.sleep(client.cache_timeout.value)
routes.recycle()
def __SIGCHLD_cb(self):
while True:
try:
pid, __ = os.waitpid(-1, os.WNOHANG)
if pid:
continue
except OSError, error:
if error.errno != errno.ECHILD:
raise
break
def _read_environ(pid):
with file('/proc/%s/environ' % pid, 'rb') as f:
return dict([i.split('=', 1) for i in f.read().split('\0') if i])
locale.setlocale(locale.LC_ALL, '')
# New defaults
application.debug.value = client.logger_level()
# If tmpfs is mounted to /tmp, `os.fstat()` will return 0 free space
# and will brake offline synchronization logic
toolkit.cachedir.value = client.profile_path('tmp')
Option.seek('main', application)
Option.seek('main', [toolkit.cachedir])
Option.seek('webui', webui)
Option.seek('client', client)
Option.seek('db', db)
Option.seek('node', [node.port, node.find_limit])
app = Application(
name='sugar-network-client',
description='Sugar Network client application.',
epilog='See http://wiki.sugarlabs.org/go/Sugar_Network '
'for details.',
config_files=[
'/etc/sweets.d',
'/etc/sweets.conf',
'~/.config/sweets/config',
client.profile_path('sweets.conf'),
])
app.start()
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