一百四十七：CMS系统之celery实现邮件和短信异步发送

celery工作原理

celery官方文档：https://docs.celeryproject.org/en/latest/

安装：pip install celery

windows下还需安装eventlet来做任务调度：pip install eventlet

启动redis，已将redis密码设为为123456

简单示例

import time
from celery import Celery

celery = Celery('tasks',
                broker='redis://:123456@192.168.223.128:6379/0',
                backend='redis://:123456@192.168.223.128:6379/0')


@celery.task
def send_email():
    print('邮件开始发送...')
    time.sleep(2)
    print('邮件发送结束...')

执行命令监控命令：celery -A tasks.celery --pool=eventlet worker --loglevel=info

运行发邮件操作

实现异步发送邮件和短信验证码

flask推荐的使用celery的方法：https://flask.palletsprojects.com/en/1.0.x/patterns/celery/

config中配置信息

CELERY_RESULT_BACKEND = 'redis://:123456@192..128:6379/0'
CELERY_BROKER_URL = 'redis://:123456@192..128:6379/0'

task代码

from celery import Celery
from flask_mail import Message
from exts import mail
import config
# 防止循环引用，在这里创建一个独立的app
from flask import Flask

app = Flask(__name__)
app.config.from_object(config)
mail.init_app(app)


def make_celery(app):
    celery = Celery(
        app.import_name,
        backend=app.config['CELERY_RESULT_BACKEND'],
        broker=app.config['CELERY_BROKER_URL']
    )
    celery.conf.update(app.config)

    class ContextTask(celery.Task):
        def __call__(self, *args, **kwargs):
            with app.app_context():
                return self.run(*args, **kwargs)

    celery.Task = ContextTask
    return celery


celery = make_celery(app)


@celery.task
def send_mail(subject, recipients, body):
    message = Message(subject=subject, recipients=recipients, body=body)
    mail.send(message)