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"""
FastCGI server that implements the WSGI protocol.
Uses the flup python package: http://www.saddi.com/software/flup/
This is a adaptation of the flup package to add FastCGI server support
to run Django apps from Web servers that support the FastCGI protocol.
This module can be run standalone or from the django-admin / manage.py
scripts using the "runfcgi" directive.
Run with the extra option "help" for a list of additional options you can
pass to this server.
"""
import sys, os
__version__ = "0.1"
__all__ = ["runfastcgi"]
FASTCGI_HELP = r"""runfcgi:
Run this project as a fastcgi application. To do this, the
flup package from http://www.saddi.com/software/flup/ is
required.
Usage:
django-admin.py runfcgi --settings=yourproject.settings [fcgi settings]
manage.py runfcgi [fcgi settings]
Optional Fcgi settings: (setting=value)
host=HOSTNAME hostname to listen on..
port=PORTNUM port to listen on.
socket=FILE UNIX socket to listen on.
method=IMPL prefork or threaded (default prefork)
maxrequests=NUMBER number of requests a child handles before it is
killed and a new child is forked (0 = no limit).
maxspare=NUMBER max number of spare processes / threads
minspare=NUMBER min number of spare processes / threads.
maxchildren=NUMBER hard limit number of processes / threads
daemonize=BOOL whether to detach from terminal.
pidfile=FILE write the spawned process-id to this file.
workdir=DIRECTORY change to this directory when daemonizing
Examples:
Run a "standard" fastcgi process on a file-descriptor
(for webservers which spawn your processes for you)
$ manage.py runfcgi method=threaded
Run a fastcgi server on a TCP host/port
$ manage.py runfcgi method=prefork host=127.0.0.1 port=8025
Run a fastcgi server on a UNIX domain socket (posix platforms only)
$ manage.py runfcgi method=prefork socket=/tmp/fcgi.sock
Run a fastCGI as a daemon and write the spawned PID in a file
$ manage.py runfcgi socket=/tmp/fcgi.sock method=prefork \
daemonize=true pidfile=/var/run/django-fcgi.pid
"""
FASTCGI_OPTIONS = {
'host': None,
'port': None,
'socket': None,
'method': 'fork',
'daemonize': None,
'workdir': '/',
'pidfile': None,
'maxspare': 5,
'minspare': 2,
'maxchildren': 50,
'maxrequests': 0,
}
def fastcgi_help(message=None):
print FASTCGI_HELP
if message:
print message
return False
def runfastcgi(argset=[], **kwargs):
options = FASTCGI_OPTIONS.copy()
options.update(kwargs)
for x in argset:
if "=" in x:
k, v = x.split('=', 1)
else:
k, v = x, True
options[k.lower()] = v
if "help" in options:
return fastcgi_help()
try:
import flup
except ImportError, e:
print >> sys.stderr, "ERROR: %s" % e
print >> sys.stderr, " Unable to load the flup package. In order to run django"
print >> sys.stderr, " as a FastCGI application, you will need to get flup from"
print >> sys.stderr, " http://www.saddi.com/software/flup/ If you've already"
print >> sys.stderr, " installed flup, then make sure you have it in your PYTHONPATH."
return False
if options['method'] in ('prefork', 'fork'):
from flup.server.fcgi_fork import WSGIServer
wsgi_opts = {
'maxSpare': int(options["maxspare"]),
'minSpare': int(options["minspare"]),
'maxChildren': int(options["maxchildren"]),
'maxRequests': int(options["maxrequests"]),
}
elif options['method'] in ('thread', 'threaded'):
from flup.server.fcgi import WSGIServer
wsgi_opts = {
'maxSpare': int(options["maxspare"]),
'minSpare': int(options["minspare"]),
'maxThreads': int(options["maxchildren"]),
}
else:
return fastcgi_help("ERROR: Implementation must be one of prefork or thread.")
wsgi_opts['debug'] = False # Turn off flup tracebacks
# Prep up and go
from django.core.handlers.wsgi import WSGIHandler
if options["host"] and options["port"] and not options["socket"]:
wsgi_opts['bindAddress'] = (options["host"], int(options["port"]))
elif options["socket"] and not options["host"] and not options["port"]:
wsgi_opts['bindAddress'] = options["socket"]
elif not options["socket"] and not options["host"] and not options["port"]:
wsgi_opts['bindAddress'] = None
else:
return fastcgi_help("Invalid combination of host, port, socket.")
if options["daemonize"] is None:
# Default to daemonizing if we're running on a socket/named pipe.
daemonize = (wsgi_opts['bindAddress'] is not None)
else:
if options["daemonize"].lower() in ('true', 'yes', 't'):
daemonize = True
elif options["daemonize"].lower() in ('false', 'no', 'f'):
daemonize = False
else:
return fastcgi_help("ERROR: Invalid option for daemonize parameter.")
if daemonize:
from django.utils.daemonize import become_daemon
become_daemon(our_home_dir=options["workdir"])
if options["pidfile"]:
fp = open(options["pidfile"], "w")
fp.write("%d\n" % os.getpid())
fp.close()
WSGIServer(WSGIHandler(), **wsgi_opts).run()
if __name__ == '__main__':
runfastcgi(sys.argv[1:])
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