Drill down to flask's asynchronous non blocking implementation code example

In fact, the official has given the plan, but it is a little hidden, in addition to the Internet there are a lot of unreliable posts misled me (of course, I do not exclude the reason that I did not understand). So to keep some of your friends from taking detours, keep a memo for yourself.

Complete code: https: / / github com wskssau/my_notespace python/todo_app

Solution: flask+gevent

Install gevent

pip install gevent

Modify the code

#  The file header 
from gevent import monkey
from gevent.pywsgi import WSGIServer

#  In the play websockets Can ignore the ha, free post next flask websockets To achieve the 
from geventwebsocket.handler import WebSocketHandler

import time

 # gevent Monkey magic 
monkey.patch_all()

app = Flask(__name__)

app.config.update(
 DEBUG=True
)

@app.route('/asyn/1/', methods=['GET'])
def test_asyn_one():
 if request.method == 'GET':
  time.sleep(10)
  return 'hello asyn'


@app.route('/test/', methods=['GET'])
def test():
 return 'hello test'


if __name__ == "__main__":
 # app.run()
 http_server = WSGIServer(('', 5000), app, handler_class=WebSocketHandler)
 http_server.serve_forever()

After running, /asyn/1/ can be accessed first and then /test/, and it is obvious that /asyn/1/ will not affect other requests while doing time-consuming tasks