mirror of https://github.com/zulip/zulip.git
325 lines
13 KiB
Python
325 lines
13 KiB
Python
from django.conf import settings
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settings.RUNNING_INSIDE_TORNADO = True
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from django.core.management.base import BaseCommand, CommandError
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from optparse import make_option
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import os
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import sys
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import tornado.web
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import logging
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import time
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from tornado import ioloop
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# A hack to keep track of how much time we spend working, versus sleeping in
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# the event loop.
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#
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# Creating a new event loop instance with a custom impl object fails (events
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# don't get processed), so instead we modify the ioloop module variable holding
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# the default poll implementation. We need to do this before any Tornado code
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# runs that might instantiate the default event loop.
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orig_poll_impl = ioloop._poll
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class InstrumentedPoll(object):
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def __init__(self):
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self._underlying = orig_poll_impl()
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self._times = []
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self._last_print = 0
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# Python won't let us subclass e.g. select.epoll, so instead
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# we proxy every method. __getattr__ handles anything we
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# don't define elsewhere.
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def __getattr__(self, name):
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return getattr(self._underlying, name)
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# Call the underlying poll method, and report timing data.
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def poll(self, timeout):
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# Avoid accumulating a bunch of insignificant data points
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# from short timeouts.
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if timeout < 1e-3:
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return self._underlying.poll(timeout)
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# Record start and end times for the underlying poll
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t0 = time.time()
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result = self._underlying.poll(timeout)
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t1 = time.time()
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# Log this datapoint and restrict our log to the past minute
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self._times.append((t0, t1))
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while self._times and self._times[0][0] < t1 - 60:
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self._times.pop(0)
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# Report (at most once every 5s) the percentage of time spent
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# outside poll
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if self._times and t1 - self._last_print >= 5:
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total = t1 - self._times[0][0]
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in_poll = sum(b-a for a,b in self._times)
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if total > 0:
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logging.info('Tornado %5.1f%% busy over the past %4.1f seconds'
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% (100 * (1 - in_poll/total), total))
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self._last_print = t1
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return result
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ioloop._poll = InstrumentedPoll
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class Command(BaseCommand):
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option_list = BaseCommand.option_list + (
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make_option('--nokeepalive', action='store_true',
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dest='no_keep_alive', default=False,
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help="Tells Tornado to NOT keep alive http connections."),
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make_option('--noxheaders', action='store_false',
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dest='xheaders', default=True,
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help="Tells Tornado to NOT override remote IP with X-Real-IP."),
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)
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help = "Starts a Tornado Web server wrapping Django."
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args = '[optional port number or ipaddr:port]\n (use multiple ports to start multiple servers)'
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def handle(self, addrport, **options):
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# setup unbuffered I/O
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sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
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sys.stderr = os.fdopen(sys.stderr.fileno(), 'w', 0)
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import django
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from django.core.handlers.wsgi import WSGIHandler
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from tornado import httpserver, wsgi, web
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try:
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addr, port = addrport.split(':')
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except ValueError:
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addr, port = '', addrport
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if not addr:
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addr = '127.0.0.1'
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if not port.isdigit():
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raise CommandError("%r is not a valid port number." % port)
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xheaders = options.get('xheaders', True)
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no_keep_alive = options.get('no_keep_alive', False)
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quit_command = 'CTRL-C'
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if settings.DEBUG:
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logging.basicConfig(level=logging.INFO,
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format='%(asctime)s %(levelname)-8s %(message)s')
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def inner_run():
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from django.conf import settings
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from django.utils import translation
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translation.activate(settings.LANGUAGE_CODE)
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print "Validating Django models.py..."
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self.validate(display_num_errors=True)
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print "\nDjango version %s" % (django.get_version())
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print "Tornado server is running at http://%s:%s/" % (addr, port)
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print "Quit the server with %s." % quit_command
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try:
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# Application is an instance of Django's standard wsgi handler.
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application = web.Application([(r"/json/get_updates", AsyncDjangoHandler),
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(r"/api/v1/get_messages", AsyncDjangoHandler),
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(r"/notify_new_message", AsyncDjangoHandler),
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(r"/notify_pointer_update", AsyncDjangoHandler),
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], debug=django.conf.settings.DEBUG)
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# start tornado web server in single-threaded mode
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http_server = httpserver.HTTPServer(application,
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xheaders=xheaders,
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no_keep_alive=no_keep_alive)
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http_server.listen(int(port), address=addr)
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if django.conf.settings.DEBUG:
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ioloop.IOLoop.instance().set_blocking_log_threshold(5)
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ioloop.IOLoop.instance().start()
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except KeyboardInterrupt:
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sys.exit(0)
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inner_run()
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#
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# Modify the base Tornado handler for Django
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#
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from threading import Lock
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from django.core.handlers import base
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from django.core.urlresolvers import set_script_prefix
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from django.core import signals
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class AsyncDjangoHandler(tornado.web.RequestHandler, base.BaseHandler):
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initLock = Lock()
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def __init__(self, *args, **kwargs):
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super(AsyncDjangoHandler, self).__init__(*args, **kwargs)
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# Set up middleware if needed. We couldn't do this earlier, because
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# settings weren't available.
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self._request_middleware = None
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self.initLock.acquire()
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# Check that middleware is still uninitialised.
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if self._request_middleware is None:
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self.load_middleware()
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self.initLock.release()
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self._auto_finish = False
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def get(self):
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from tornado.wsgi import WSGIContainer
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from django.core.handlers.wsgi import WSGIRequest
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import urllib
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environ = WSGIContainer.environ(self.request)
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environ['PATH_INFO'] = urllib.unquote(environ['PATH_INFO'])
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request = WSGIRequest(environ)
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request._tornado_handler = self
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set_script_prefix(base.get_script_name(environ))
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signals.request_started.send(sender=self.__class__)
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try:
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response = self.get_response(request)
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if not response:
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return
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finally:
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signals.request_finished.send(sender=self.__class__)
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self.set_status(response.status_code)
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for h in response.items():
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self.set_header(h[0], h[1])
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if not hasattr(self, "_new_cookies"):
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self._new_cookies = []
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self._new_cookies.append(response.cookies)
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self.write(response.content)
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self.finish()
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def head(self):
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self.get()
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def post(self):
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self.get()
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# Based on django.core.handlers.base: get_response
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def get_response(self, request):
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"Returns an HttpResponse object for the given HttpRequest"
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from django import http
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from django.core import exceptions, urlresolvers
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from django.conf import settings
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try:
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try:
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# Setup default url resolver for this thread.
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urlconf = settings.ROOT_URLCONF
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urlresolvers.set_urlconf(urlconf)
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resolver = urlresolvers.RegexURLResolver(r'^/', urlconf)
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response = None
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# Apply request middleware
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for middleware_method in self._request_middleware:
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response = middleware_method(request)
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if response:
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break
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if hasattr(request, "urlconf"):
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# Reset url resolver with a custom urlconf.
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urlconf = request.urlconf
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urlresolvers.set_urlconf(urlconf)
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resolver = urlresolvers.RegexURLResolver(r'^/', urlconf)
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callback, callback_args, callback_kwargs = resolver.resolve(
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request.path_info)
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# Apply view middleware
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if response is None:
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for middleware_method in self._view_middleware:
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response = middleware_method(request, callback, callback_args, callback_kwargs)
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if response:
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break
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if response is None:
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from ...decorator import RespondAsynchronously
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try:
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response = callback(request, *callback_args, **callback_kwargs)
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if response is RespondAsynchronously:
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return
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except Exception, e:
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# If the view raised an exception, run it through exception
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# middleware, and if the exception middleware returns a
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# response, use that. Otherwise, reraise the exception.
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for middleware_method in self._exception_middleware:
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response = middleware_method(request, e)
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if response:
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break
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if response is None:
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raise
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if response is None:
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try:
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view_name = callback.func_name
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except AttributeError:
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view_name = callback.__class__.__name__ + '.__call__'
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raise ValueError("The view %s.%s returned None." %
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(callback.__module__, view_name))
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# If the response supports deferred rendering, apply template
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# response middleware and the render the response
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if hasattr(response, 'render') and callable(response.render):
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for middleware_method in self._template_response_middleware:
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response = middleware_method(request, response)
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response = response.render()
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except http.Http404, e:
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if settings.DEBUG:
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from django.views import debug
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response = debug.technical_404_response(request, e)
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else:
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try:
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callback, param_dict = resolver.resolve404()
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response = callback(request, **param_dict)
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except:
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try:
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response = self.handle_uncaught_exception(request, resolver, sys.exc_info())
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finally:
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signals.got_request_exception.send(sender=self.__class__, request=request)
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except exceptions.PermissionDenied:
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logging.warning(
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'Forbidden (Permission denied): %s', request.path,
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extra={
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'status_code': 403,
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'request': request
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})
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try:
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callback, param_dict = resolver.resolve403()
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response = callback(request, **param_dict)
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except:
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try:
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response = self.handle_uncaught_exception(request,
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resolver, sys.exc_info())
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finally:
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signals.got_request_exception.send(
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sender=self.__class__, request=request)
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except SystemExit:
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# See https://code.djangoproject.com/ticket/4701
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raise
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except Exception, e:
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exc_info = sys.exc_info()
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signals.got_request_exception.send(sender=self.__class__, request=request)
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return self.handle_uncaught_exception(request, resolver, exc_info)
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finally:
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# Reset urlconf on the way out for isolation
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urlresolvers.set_urlconf(None)
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try:
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# Apply response middleware, regardless of the response
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for middleware_method in self._response_middleware:
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response = middleware_method(request, response)
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response = self.apply_response_fixes(request, response)
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except: # Any exception should be gathered and handled
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signals.got_request_exception.send(sender=self.__class__, request=request)
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response = self.handle_uncaught_exception(request, resolver, sys.exc_info())
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return response
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