我还没有找到一种设置处理程序以检测Flask服务器何时已在运行的方法。考虑以下代码片段:
import flask
import requests
def on_start():
# send a request to the server, it's safe to do so
# because we know it's already running
r = requests.get("http://localhost:1234")
print(r.text) # hello world
app = flask.Flask(__name__)
@app.route("/")
def hello():
return "hello world"
app.run(port=1234, host="localhost", on_start=on_start)
最后一行失败,因为on_start
不是run
的自变量,但是希望您对我正在尝试做的事情有所了解。我该怎么办?
答案 0 :(得分:-1)
您可以做的是用before_first_request
装饰器包装要启动的功能,如此处==> http://flask.pocoo.org/docs/1.0/api/#flask.Flask.before_first_request
但是,只有有人向服务器发出请求,它才能启动,但是您可以执行以下操作:
import requests
import threading
import time
from flask import Flask
app = Flask(__name__)
@app.before_first_request
def activate_job():
def run_job():
while True:
print("Run recurring task")
time.sleep(3)
thread = threading.Thread(target=run_job)
thread.start()
@app.route("/")
def hello():
return "Hello World!"
def start_runner():
def start_loop():
not_started = True
while not_started:
print('In start loop')
try:
r = requests.get('http://127.0.0.1:5000/')
if r.status_code == 200:
print('Server started, quiting start_loop')
not_started = False
print(r.status_code)
except:
print('Server not yet started')
time.sleep(2)
print('Started runner')
thread = threading.Thread(target=start_loop)
thread.start()
if __name__ == "__main__":
start_runner()
app.run()
详细信息和来源(通过Google-fu:https://networklore.com/start-task-with-flask/
)