mirror of https://github.com/zulip/zulip.git
110 lines
4.1 KiB
Python
110 lines
4.1 KiB
Python
"""
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WSGI config for zulip project.
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This module contains the WSGI application used by Django's development server
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and any production WSGI deployments. It should expose a module-level variable
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named ``application``. Django's ``runserver`` and ``runfcgi`` commands discover
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this application via the ``WSGI_APPLICATION`` setting.
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Usually you will have the standard Django WSGI application here, but it also
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might make sense to replace the whole Django WSGI application with a custom one
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that later delegates to the Django one. For example, you could introduce WSGI
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middleware here, or combine a Django application with an application of another
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framework.
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"""
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import os
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import sys
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BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
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sys.path.append(BASE_DIR)
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from scripts.lib.setup_path import setup_path
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setup_path()
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os.environ.setdefault("DJANGO_SETTINGS_MODULE", "zproject.settings")
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import contextlib
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from collections.abc import Callable
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from typing import Any
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import orjson
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from django.core.wsgi import get_wsgi_application
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try:
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# This application object is used by any WSGI server configured to use this
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# file. This includes Django's development server, if the WSGI_APPLICATION
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# setting points here.
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application = get_wsgi_application()
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# We force loading of the main parts of the application now, by
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# handing it a fake request, rather than have to pay that price
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# during the first request served by this process. Hitting the
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# /health endpoint will not only load Django and all of the views
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# (by loading the URL dispatcher) but will also force open any
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# lazy-loaded service connections.
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#
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# The return value (and thus response status) of this healthcheck
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# request is ignored, so we do return the application handler even
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# if connections are not fully available yet. This at least
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# allows application logging to handle any such errors, instead of
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# arcane errors from uwsgi not being able to load its handler
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# function.
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def ignored_start_response(
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status: str, headers: list[tuple[str, str]], exc_info: Any = None, /
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) -> Callable[[bytes], object]:
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return lambda x: None
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application(
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{
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"REQUEST_METHOD": "GET",
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"SERVER_NAME": "127.0.0.1",
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"SERVER_PORT": "443",
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"PATH_INFO": "/health",
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"REMOTE_ADDR": "127.0.0.1",
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"wsgi.input": sys.stdin,
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"wsgi.url_scheme": "https",
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},
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ignored_start_response,
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)
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with contextlib.suppress(ModuleNotFoundError):
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# The uwsgi module is only importable when running under
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# uwsgi; development uses this file as well, but inside a
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# pure-Python server. The surrounding contextmanager ensures
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# that we don't bother with these steps if we're in
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# development.
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import uwsgi
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if uwsgi.worker_id() == uwsgi.numproc:
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# This is the last worker to load in the chain reload
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with open("/var/lib/zulip/django-workers.ready", "wb") as f:
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# The contents of this file are not read by restart-server
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# in any way, but leave some useful information about the
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# state of uwsgi.
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f.write(
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orjson.dumps(
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uwsgi.workers(), option=orjson.OPT_INDENT_2, default=lambda e: e.decode()
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),
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)
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except Exception:
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# If /etc/zulip/settings.py contains invalid syntax, Django
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# initialization will fail in django.setup(). In this case, our
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# normal configuration to logs errors to /var/log/zulip/errors.log
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# won't have been initialized. Since it's really valuable for the
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# debugging process for a Zulip 500 error to always be "check
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# /var/log/zulip/errors.log", we log to that file directly here.
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import logging
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logging.basicConfig(
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filename="/var/log/zulip/errors.log",
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level=logging.INFO,
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format="%(asctime)s %(levelname)s %(name)s %(message)s",
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)
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logger = logging.getLogger(__name__)
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logger.exception("get_wsgi_application() failed:")
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raise
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