我需要创建一个网络应用程序来显示通过定期传入的 UDP 数据包提供的数据。该站点可能位于 Flask(可能是 Pyramid)中,部署在 Nginx 下。我如何创建一个非常简单的后台任务(基本上只是 socket.recv())来监听任何传入的数据包,并将数据推送到全局可访问的列表中?
我可以简单地从 main() 生成一个线程来执行此操作,还是我需要使用 Celery 或 PyRes 之类的东西?
感谢您的指导。
最佳答案
你将不得不使用 celery ,但你很幸运,因为 There's already a flask extension that integrates celery .你必须 pip install flask
, pip install flask-celery
, pip install redis
并且你的系统需要一个redis服务器.
import socket, select, Queue
from flask import Flask
from celery import Celery
def make_celery(app):
celery = Celery(app.import_name, broker=app.config['CELERY_BROKER_URL'])
celery.conf.update(app.config)
TaskBase = celery.Task
class ContextTask(TaskBase):
abstract = True
def __call__(self, *args, **kwargs):
with app.app_context():
return TaskBase.__call__(self, *args, **kwargs)
celery.Task = ContextTask
return celery
app = Flask(__name__)
app.config.update(
CELERY_BROKER_URL='redis://localhost:6379',
CELERY_RESULT_BACKEND='redis://localhost:6379'
)
celery = make_celery(app)
socket_queue = Queue.Queue()
@celery.task()
def listen_to_udp():
"""
This code was taken from
https://stackoverflow.com/questions/9969259/python-raw-socket-listening-for-udp-packets-only-half-of-the-packets-received
"""
s1 = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s1.bind(('0.0.0.0', 1337))
s2 = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_UDP)
s2.bind(('0.0.0.0', 1337))
while True:
r, w, x = select.select([s1, s2], [], [])
for i in r:
socket_queue.put((i, i.recvfrom(131072)))
@app.route("/")
def test_home():
listen_to_udp.delay()
print(socket_queue.get())
if __name__ == "__main__":
#run install.py to install dependencies and create the database
app.run(host="0.0.0.0", port=5000, debug=True)
关于python - Flask 或 Pyramid 中的简单网络 UDP 监听,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26281935/