8d4eac5ea1
Set a safe timeout value as we cannot assume, that the current implementation of busy-waiting won't be changed in the future.
139 lines
4.4 KiB
Python
Executable File
139 lines
4.4 KiB
Python
Executable File
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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#
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# This file is part of Radicale Server - Calendar Server
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# Copyright © 2008-2011 Guillaume Ayoub
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# Copyright © 2008 Nicolas Kandel
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# Copyright © 2008 Pascal Halter
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Radicale. If not, see <http://www.gnu.org/licenses/>.
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# This file is just a script, allow [a-z0-9]* variable names
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# pylint: disable-msg=C0103
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# ``import radicale`` refers to the ``radicale`` module, not ``radicale.py``
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# pylint: disable-msg=W0406
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"""
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Radicale CalDAV Server.
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Launch the server according to configuration and command-line options.
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"""
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# TODO: Manage smart and configurable logs
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import os
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import sys
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import optparse
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import signal
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import threading
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import radicale
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# Get command-line options
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parser = optparse.OptionParser(version=radicale.VERSION)
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parser.add_option(
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"-d", "--daemon", action="store_true",
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default=radicale.config.getboolean("server", "daemon"),
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help="launch as daemon")
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parser.add_option(
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"-f", "--foreground", action="store_false", dest="daemon",
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help="launch in foreground (opposite of --daemon)")
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parser.add_option(
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"-H", "--hosts",
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default=radicale.config.get("server", "hosts"),
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help="set server hostnames and ports")
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parser.add_option(
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"-s", "--ssl", action="store_true",
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default=radicale.config.getboolean("server", "ssl"),
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help="use SSL connection")
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parser.add_option(
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"-S", "--no-ssl", action="store_false", dest="ssl",
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help="do not use SSL connection (opposite of --ssl)")
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parser.add_option(
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"-k", "--key",
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default=radicale.config.get("server", "key"),
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help="set private key file")
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parser.add_option(
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"-c", "--certificate",
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default=radicale.config.get("server", "certificate"),
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help="set certificate file")
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options = parser.parse_args()[0]
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# Update Radicale configuration according to options
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for option in parser.option_list:
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key = option.dest
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if key:
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value = getattr(options, key)
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radicale.config.set("server", key, value)
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# Fork if Radicale is launched as daemon
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if options.daemon:
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if os.fork():
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sys.exit()
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sys.stdout = sys.stderr = open(os.devnull, "w")
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# Create calendar servers
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servers = []
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server_class = radicale.HTTPSServer if options.ssl else radicale.HTTPServer
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for host in options.hosts.split(','):
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address, port = host.strip().rsplit(':', 1)
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address, port = address.strip('[] '), int(port)
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servers.append(server_class((address, port), radicale.CalendarHTTPHandler))
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# this event marks that the program should be shut down
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server_exited = threading.Event()
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# SIGTERM and SIGINT (aka KeyboardInterrupt) should just mark this for shutdown
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signal.signal(signal.SIGTERM, lambda *_: server_exited.set())
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signal.signal(signal.SIGINT, lambda *_: server_exited.set())
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def serve_forever(server):
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"""Serve a server forever, and mark the process for shut down if things go wrong."""
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try:
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server.serve_forever()
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finally:
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server_exited.set()
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# start the servers in a different loop to avoid possible race-conditions,
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# when a server exists but another server is added to the list at the same time
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for server in servers:
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threading.Thread(target=serve_forever, args=(server,)).start()
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# mainloop: wait until all servers are exited
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# we must do the busy-waiting here, as all ".join()"-calls
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# completly block the thread, such that signals are not received
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try:
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while True:
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# the number is irrelevant -- the only thing that matters, is that it is
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# larger than 0.05
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# this is due to python implementing its own busy-waiting logic
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server_exited.wait(5.0)
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if server_exited.is_set():
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break
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finally:
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#
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# Cleanly shutdown server
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#
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# ignore signals, s.t. they cannot interfere
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signal.signal(signal.SIGINT, signal.SIG_IGN)
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signal.signal(signal.SIGTERM, signal.SIG_IGN)
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for server in servers:
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server.shutdown()
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