问题
I currently have a Flask application
from flask import Flask
import time
app = Flask(__name__)
@app.route('/')
def foobar_view():
long_running() # TODO: Just trigger this; don't wait for completion
return 'Done!'
def long_running():
print('long_running:start')
time.sleep(100)
print('long_running:end')
app.run(host='localhost', port=5000)
started with
gunicorn --worker-class=gevent \
--worker-connections=1000 \
--bind 0.0.0.0:5000 my_app.app:app \
--workers=4 \
--timeout 120 \
--keep-alive 120
The app will not have heavy load, and this long_running function will only rarely be triggered. I'm looking for a simple way to run this and I'm open to changes regarding gunicorn / gevent. I'm using Python 3.7.
How can I make long_running execute asynchronously?
回答1:
The solution could be to run int in a Thread:
from flask import Flask
import time
from threading import Thread
app = Flask(__name__)
@app.route('/')
def foobar_view():
Thread(target=async_long_running, args=(app, 'works')).start()
return 'Done!'
def async_long_running(app, msg):
with app.app_context():
long_running(msg)
def long_running(foo):
print('long_running:start:{}'.format(foo))
time.sleep(100)
print('long_running:end')
app.run(host='localhost', port=5000)
来源：https://stackoverflow.com/questions/56269872/how-can-i-start-an-asynchronous-function-in-flask-gunicorn-gevent