如何使用Flask-Script和Gunicorn
我正在使用Flask的内置开发服务器来开发Flask应用程序。我使用Flask-Script启动它。我想切换为使用Gunicorn作为Web服务器。为此,我需要在Flask-Script和Gunicorn之间编写某种集成代码吗?还是Flask-Script与使用Gunicorn运行应用程序无关?
提前致谢!
到@ sean-lynch的道具。以下是根据他的回答而工作,经过测试的代码。我所做的更改是:
在尝试启动服务器之前,将从
sys.argv
中删除了Gunicorn无法识别的选项remove_non_gunicorn_command_line_args()
。否则,Gunicorn会引发错误,并显示以下消息:error: unrecognized arguments: --port 5010
。我删除-p
这是因为,即使它不会导致错误,也仅是因为Gunicorn认为它是其pidfile
选择的简称,这显然不是我们想要的。修改GunicornServer.handle()签名以匹配其覆盖的方法,即Command.handle()
from flask_script import Commandfrom gunicorn.app.base import Application
class GunicornServer(Command):
description = 'Run the app within Gunicorn'
def __init__(self, host='127.0.0.1', port=8000, workers=6):
self.port = port
self.host = host
self.workers = workers
def get_options(self):
return (
Option('-t', '--host',
dest='host',
default=self.host),
Option('-p', '--port',
dest='port',
type=int,
default=self.port),
Option('-w', '--workers',
dest='workers',
type=int,
default=self.workers),
)
def handle(self, app, *args, **kwargs):
host = kwargs['host']
port = kwargs['port']
workers = kwargs['workers']
def remove_non_gunicorn_command_line_args():
import sys
args_to_remove = ['--port','-p']
def args_filter(name_or_value):
keep = not args_to_remove.count(name_or_value)
if keep:
previous = sys.argv[sys.argv.index(name_or_value) - 1]
keep = not args_to_remove.count(previous)
return keep
sys.argv = filter(args_filter, sys.argv)
remove_non_gunicorn_command_line_args()
from gunicorn import version_info
if version_info < (0, 9, 0):
from gunicorn.arbiter import Arbiter
from gunicorn.config import Config
arbiter = Arbiter(Config({'bind': "%s:%d" % (host, int(port)),'workers': workers}), app)
arbiter.run()
else:
class FlaskApplication(Application):
def init(self, parser, opts, args):
return {
'bind': '{0}:{1}'.format(host, port),
'workers': workers
}
def load(self):
return app
FlaskApplication().run()
manager.add_command('gunicorn', GunicornServer())
回答:
正如Dhaivat所说,你可以直接在Gunicorn中使用Flask应用程序。
如果你仍然想使用Flask-Script,则需要创建一个custom Command
。我没有使用Gunicorn的经验,但是我发现了Flask-Actions 的类似解决方案,并将其移植到Flask-Script中,尽管会警告,但未经测试。
from flask_script import Command, Optionclass GunicornServer(Command):
description = 'Run the app within Gunicorn'
def __init__(self, host='127.0.0.1', port=8000, workers=4):
self.port = port
self.host = host
self.workers = workers
def get_options(self):
return (
Option('-H', '--host',
dest='host',
default=self.host),
Option('-p', '--port',
dest='port',
type=int,
default=self.port),
Option('-w', '--workers',
dest='workers',
type=int,
default=self.workers),
)
def handle(self, app, host, port, workers):
from gunicorn import version_info
if version_info < (0, 9, 0):
from gunicorn.arbiter import Arbiter
from gunicorn.config import Config
arbiter = Arbiter(Config({'bind': "%s:%d" % (host, int(port)),'workers': workers}), app)
arbiter.run()
else:
from gunicorn.app.base import Application
class FlaskApplication(Application):
def init(self, parser, opts, args):
return {
'bind': '{0}:{1}'.format(host, port),
'workers': workers
}
def load(self):
return app
FlaskApplication().run()
然后,你可以注册它来代替瓶的本地开发服务器在python manage.py runserver
manager.add_command("runserver", GunicornServer())
或注册为新命令,例如 python manage.py gunicorn
manager.add_command("gunicorn", GunicornServer())
随着瓶脚本的最新版本,改变方法handle
有__call__
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