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4f5548e8bd
http://unicorn.bogomips.org/SIGNALS.html TODO: implementing daemonized mode & config file
116 lines
3.9 KiB
Python
116 lines
3.9 KiB
Python
# -*- coding: utf-8 -
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#
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# 2009 (c) Benoit Chesneau <benoitc@e-engura.com>
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# 2009 (c) Paul J. Davis <paul.joseph.davis@gmail.com>
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation
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# files (the "Software"), to deal in the Software without
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# restriction, including without limitation the rights to use,
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# copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following
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# conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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# OTHER DEALINGS IN THE SOFTWARE.
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import errno
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import fcntl
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import logging
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import os
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import select
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import signal
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import socket
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import sys
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import http
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import util
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log = logging.getLogger(__name__)
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class Worker(object):
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SIGNALS = map(
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lambda x: getattr(signal, "SIG%s" % x),
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"HUP QUIT INT TERM TTIN TTOU USR1 USR2".split()
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)
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def __init__(self, workerid, ppid, socket, app):
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self.id = workerid
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self.ppid = ppid
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self.socket = socket
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self.address = socket.getsockname()
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self.tmp = os.tmpfile()
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self.app = app
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self.alive = True
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def init_signals(self):
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map(lambda s: signal.signal(s, signal.SIG_DFL), self.SIGNALS)
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signal.signal(signal.SIGQUIT, self.handle_quit)
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signal.signal(signal.SIGTERM, self.handle_exit)
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signal.signal(signal.SIGINT, self.handle_exit)
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signal.signal(signal.SIGUSR1, self.handle_quit)
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signal.signal(signal.SIGUSR2, self.handle_quit)
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def handle_quit(self, sig, frame):
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self.alive = False
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def handle_exit(self, sig, frame):
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sys.exit(-1)
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def run(self):
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self.init_signals()
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spinner = 0
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while self.alive:
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spinner = (spinner+1) % 2
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os.fchmod(self.tmp.fileno(), spinner)
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while self.alive:
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try:
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ret = select.select([self.socket], [], [], 2.0)
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except select.error, e:
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if e[0] != errno.EINTR:
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raise
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if ret[0]:
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break
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# Accept until we hit EAGAIN. We're betting that when we're
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# processing clients that more clients are waiting. When
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# there's no more clients waiting we go back to the select()
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# loop and wait for some lovin.
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while self.alive:
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try:
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(conn, addr) = self.socket.accept()
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except socket.error, e:
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if e[0] in (errno.EAGAIN, errno.EINTR,
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errno.ECONNABORTED):
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break # Jump back to select
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raise # Uh oh!
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conn.setblocking(1)
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try:
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self.handle(conn, addr)
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except Exception, e:
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log.exception("Error processing request. [%s]" % str(e))
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# Update the fd mtime on each client completion
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# to signal that this worker process is alive.
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spinner = (spinner+1) % 2
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os.fchmod(self.tmp.fileno(), spinner)
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def handle(self, conn, client):
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req = http.HTTPRequest(conn, client, self.address)
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result = self.app(req.read(), req.start_response)
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response = http.HTTPResponse(req, result)
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response.send()
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