Flask异步发送邮件的方法

第一步，修改工厂函数，配置邮件参数

from flask import Flask
from config import Config
from flask_sqlalchemy import SQLAlchemy
from flask_mail import Mail

db = SQLAlchemy()
mail = Mail()

def create_app():
    app = Flask(__name__)
    app.config.from_object(Config)
    db.init_app(app)
    mail.init_app(app) 

    from .controller import controller
    app.register_blueprint(controller)

    return app

第二步，新建一个线程来发送邮件

from flask import current_app, render_template
from flask_mail import Message
from threading import Thread
from main import mail

def send_async_email(app, msg):
    with app.app_context():
        mail.send(msg)

def send_email(to, subject, template = 'index', **kwargs):
    app = current_app._get_current_object()
    msg = Message(subject, sender = app.config['MAIL_USERNAME'], recipients = [to])
    msg.html = render_template('{}.html'.format(template), **kwargs)
    thr = Thread(target = send_async_email, args = [app, msg])
    thr.start()
    return thr

从current_app的_get_current_object()方法拿到应用程序上下文。特此记录一下