192 lines
6.4 KiB
Python
192 lines
6.4 KiB
Python
# -*- 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 © 2011-2013 Guillaume Ayoub
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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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"""
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Radicale executable module.
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This module can be executed from a command line with ``$python -m radicale`` or
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from a python programme with ``radicale.__main__.run()``.
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"""
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import atexit
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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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from wsgiref.simple_server import make_server
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from . import (
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Application, config, HTTPServer, HTTPSServer, log, RequestHandler, VERSION)
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# This is a script, many branches and variables
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# pylint: disable=R0912,R0914
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def run():
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"""Run Radicale as a standalone server."""
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# Get command-line options
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parser = optparse.OptionParser(version=VERSION)
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parser.add_option(
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"-d", "--daemon", action="store_true",
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help="launch as daemon")
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parser.add_option(
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"-p", "--pid",
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help="set PID filename for daemon mode")
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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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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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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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help="set private key file")
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parser.add_option(
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"-c", "--certificate",
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help="set certificate file")
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parser.add_option(
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"-D", "--debug", action="store_true",
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help="print debug information")
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parser.add_option(
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"-C", "--config",
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help="use a specific configuration file")
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options = parser.parse_args()[0]
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# Read in the configuration specified by the command line (if specified)
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configuration_found = (
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config.read(options.config) if options.config else True)
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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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section = "logging" if key == "debug" else "server"
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value = getattr(options, key)
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if value is not None:
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config.set(section, key, str(value))
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# Start logging
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log.start()
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# Log a warning if the configuration file of the command line is not found
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if not configuration_found:
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log.LOGGER.warning(
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"Configuration file '%s' not found" % options.config)
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# Fork if Radicale is launched as daemon
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if config.getboolean("server", "daemon"):
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if os.path.exists(config.get("server", "pid")):
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raise OSError("PID file exists: %s" % config.get("server", "pid"))
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pid = os.fork()
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if pid:
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sys.exit()
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elif config.get("server", "pid"):
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open(config.get("server", "pid"), "w").write(str(os.getpid()))
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sys.stdout = sys.stderr = open(os.devnull, "w")
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# Register exit function
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def cleanup():
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"""Remove the PID files."""
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log.LOGGER.debug("Cleaning up")
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# Remove PID file
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if (config.get("server", "pid") and
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config.getboolean("server", "daemon")):
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os.unlink(config.get("server", "pid"))
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atexit.register(cleanup)
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log.LOGGER.info("Starting Radicale")
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# Create collection servers
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servers = []
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server_class = (
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HTTPSServer if config.getboolean("server", "ssl") else HTTPServer)
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shutdown_program = threading.Event()
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for host in config.get("server", "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(
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make_server(address, port, Application(),
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server_class, RequestHandler))
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# SIGTERM and SIGINT (aka KeyboardInterrupt) should just mark this for
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# shutdown
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signal.signal(signal.SIGTERM, lambda *_: shutdown_program.set())
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signal.signal(signal.SIGINT, lambda *_: shutdown_program.set())
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def serve_forever(server):
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"""Serve a server forever, cleanly shutdown when things go wrong."""
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try:
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server.serve_forever()
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finally:
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shutdown_program.set()
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log.LOGGER.debug(
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"Base URL prefix: %s" % config.get("server", "base_prefix"))
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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
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# time
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for server in servers:
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log.LOGGER.debug(
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"Listening to %s port %s" % (
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server.server_name, server.server_port))
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if config.getboolean("server", "ssl"):
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log.LOGGER.debug("Using SSL")
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threading.Thread(target=serve_forever, args=(server,)).start()
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log.LOGGER.debug("Radicale server ready")
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# Main loop: wait until all servers are exited
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try:
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# We must do the busy-waiting here, as all ``.join()`` calls completly
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# block the thread, such that signals are not received
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while True:
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# The number is irrelevant, it only needs to be greater than 0.05
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# due to python implementing its own busy-waiting logic
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shutdown_program.wait(5.0)
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if shutdown_program.is_set():
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break
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finally:
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# Ignore signals, so that 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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log.LOGGER.info("Stopping Radicale")
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for server in servers:
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log.LOGGER.debug(
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"Closing server listening to %s port %s" % (
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server.server_name, server.server_port))
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server.shutdown()
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# pylint: enable=R0912,R0914
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if __name__ == "__main__":
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run()
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