brosner / oebfare
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Description: my personal blog written with django
Homepage: http://oebfare.com
Clone URL: git://github.com/brosner/oebfare.git 
Added a WSGI management command based on bosnowsgi.
brosner (author)
Mon Nov 03 12:59:55 -0800 2008
commit  b5918c8fc2b01ac72e592205ec8450a44b468d84
tree    903205f5d0b6f4fe4bd84bb1135a175125ae58d7
parent  f3d436e52de129bbf03f5d57d741f592d42b5c93
oebfare / apps / wsgi / management / commands / runwsgi.py
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b5918c8f » brosner 2008-11-03 Added a WSGI management com... 1 import os
2 import signal
3
4 from optparse import OptionParser, make_option
5 from django.core.management.base import BaseCommand
6 from django.core.handlers.wsgi import WSGIHandler
7 from django.conf import settings
8
9 try:
10 from cherrypy.wsgiserver import CherryPyWSGIServer
11 except ImportError:
12 from wsgiserver import CherryPyWSGIServer
13
14 DEFAULT_HOST = getattr(settings, "WSGI_HOST", "127.0.0.1")
15 DEFAULT_PORT = getattr(settings, "WSGI_PORT", 8001)
16
17 class Command(BaseCommand):
18 option_list = BaseCommand.option_list + (
19 make_option("-h", "--host", dest="host", default="127.0.0.1"),
20 make_option("-p", "--port", dest="port", default=8001),
21 make_option("-d", "--daemon", dest="daemonize", action="store_true"),
22 )
23 requires_model_validation = False
24
25 def handle(self, *args, **options):
26 self.server = CherryPyWSGIServer((options["host"], options["port"]), WSGIHandler())
27 self.pidfile = os.path.join(settings.PROJECT_ROOT, "logs/wsgi.pid")
28 try:
29 action = args[0]
30 except IndexError:
31 print "You must provide an action. Possible actions are start, stop and restart."
32 raise SystemExit
33 if options["daemonize"]:
34 daemonize()
35 if action == "start":
36 self.start()
37 elif action == "stop":
38 pid = open(self.pidfile, "r").read()
39 self.stop(pid)
40 elif action == "restart":
41 pid = open(self.pidfile, "r").read()
42 self.restart(pid)
43
44 def start(self):
45 writepid(self.pidfile)
46 try:
47 self.server.start()
48 except KeyboardInterrupt:
49 # likely not a daemon so make sure to shutdown properly.
50 self.server.stop()
51
52 def stop(self, pid):
53 os.kill(int(pid), signal.SIGHUP)
54
55 def restart(self, pid):
56 self.stop(pid)
57 self.start()
58
59 def create_parser(self, prog_name, subcommand):
60 """
61 Create and return the ``OptionParser`` which will be used to
62 parse the arguments to this command.
63 """
64 return OptionParser(prog=prog_name, usage=self.usage(subcommand),
65 version = self.get_version(),
66 option_list = self.option_list,
67 conflict_handler = "resolve")
68
69 def writepid(pid_file):
70 """
71 Write the process ID to disk.
72 """
73 fp = open(pid_file, "w")
74 fp.write(str(os.getpid()))
75 fp.close()
76
77 def daemonize():
78 """
79 Detach from the terminal and continue as a daemon.
80 """
81 # swiped from twisted/scripts/twistd.py
82 # See http://www.erlenstar.demon.co.uk/unix/faq_toc.html#TOC16
83 if os.fork(): # launch child and...
84 os._exit(0) # kill off parent
85 os.setsid()
86 if os.fork(): # launch child and...
87 os._exit(0) # kill off parent again.
88 os.umask(077)
89 null = os.open("/dev/null", os.O_RDWR)
90 for i in range(3):
91 try:
92 os.dup2(null, i)
93 except OSError, e:
94 if e.errno != errno.EBADF:
95 raise
96 os.close(null)
97