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  • Flask-mail 发邮件慢(即使异步)

    Flask-mail 发邮件慢(即使异步)

    一开始,按照狗书上的代码异步发邮件,但是发现原本响应只需要150ms的页面加了邮件发送就变成了5s响应(这怕不是假异步)

    狗书的异步发邮件代码:

    def send_async_email(app, msg):
        with app.app_context():
            mail.send(msg)
    
    
    def send_email(to, subject, template, **kwargs):
        app = current_app._get_current_object()
        msg = Message(app.config['FLASKY_MAIL_SUBJECT_PREFIX'] + subject,
                   sender=app.config['FLASKY_MAIL_SENDER'], recipients=[to])
        print datetime.datetime.now().second
        msg.body = render_template(template + '.txt', **kwargs)
        msg.html = render_template(template + '.html', **kwargs)
        print datetime.datetime.now().second
        thr = Thread(target=send_async_email, args=[app, msg])
        thr.start()
        print datetime.datetime.now().second
        return thr
    

    之后我在每一个可能延时的位置加了一句print datetime.datetime.now().second,最后发现,真正拖时间的地方居然是在Message初始化的时候!

    msg = Message(app.config['FLASKY_MAIL_SUBJECT_PREFIX'] + subject,
                   sender=app.config['FLASKY_MAIL_SENDER'], recipients=[to])
    

    于是自己优化了一下发邮件的代码,把Message初始化的部分也放进了异步线程中。

    优化后,速度明显提升:)

    我的优化代码:

    def send_async_email(app, to, subject, template_done_html, template_done_txt):
        with app.app_context():
            msg = Message(app.config['FLASKY_MAIL_SUBJECT_PREFIX'] + subject,
                          sender=app.config['FLASKY_MAIL_SENDER'], recipients=[to])
            msg.body = template_done_txt
            msg.html = template_done_html
            mail.send(msg)
    
    
    def send_email(to, subject, template, **kwargs):
        app = current_app._get_current_object()
        template_done_html = render_template(template + '.html', **kwargs)
        template_done_txt = render_template(template + '.txt', **kwargs)
        thr = Thread(target=send_async_email, args=[app, to, subject, template_done_html, template_done_txt])
        thr.start()
        return thr
    
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  • 原文地址:https://www.cnblogs.com/santiego/p/10356001.html
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