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如果我的异步send_email函数中出现异常，我会尝试显示错误， 但即使在后台线程中发生异常后，数据仍会存储在数据库中。except 块永远不会被执行。我试图阻止数据库提交并重定向到带有错误消息的页面

send_email 函数文件

from threading import Thread
from flask import current_app,render_template,flash
from flask_mail import Message
from feedback import mail


def send_async_email(app, msg):
    try:
        with app.app_context():
            mail.send(msg)
    except:
        raise Exception("Exception occurred in Mail")
        return False

def send_email(to,subject,template,**kwargs):
    app = current_app._get_current_object()
    msg=Message(current_app.config['MAIL_SUBJECT_PREFIX'] + subject,
    sender=current_app.config['MAIL_SENDER'],recipients=[to])
    msg.body=render_template(template +'.txt',**kwargs)
    msg.html=render_template(template +'.html',**kwargs)
    try:
        thr = Thread(target=send_async_email, args=[app, msg])
        thr.start()
        return thr
    except:
        raise Exception("Error occured")

视图.py

@home.route('/register',methods=["GET","POST"])
def register():
    # form=LoginForm()
    form=LoginForm(prefix="login")
    form1=RegisterForm(prefix="register")
    print(form1.errors)
    if form1.validate_on_submit():

        users=Users(email=form1.email.data.strip())
        users.set_password(form1.password.data.strip())
        organization=Organization(organization_name=form1.org_name.data.strip())
        organization.userorg.append(users)
        db.session.add(users)
        db.session.add(organization)
        db.session.flush()
        token=users.generate_confirmation_token()
        try:
            print("INSIDE TRY BLOCK")
            email=send_email(users.email,'Confirm your account','email/confirm_email',user=users,token=token)
        except Exception as e:
            print("INSIDE Exception BLOCK")
            print(e)
            flash("Errors","danger")
            db.session.rollback()
            return redirect(url_for('home.home_view'))

        db.session.commit()
        flash("A confirmation email has been sent")
        return redirect(url_for('home.home_view'))


    return render_template('home/landing-semi.html',form=form,form1=form1)

收到的错误

 raise SMTPSenderRefused(code, resp, from_addr)
smtplib.SMTPSenderRefused: (530, b'5.5.1 Authentication Required. Learn more at\n5.5.1  https://support.google.com/mail/?p=WantAuthError g10-v6sm7818697pfi.148 - gsmtp', '=?utf-8?q?Osfapp_Admin?= <lmnography@gmail.com>')

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib64/python3.6/threading.py", line 916, in _bootstrap_inner
    self.run()
  File "/usr/lib64/python3.6/threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
  File "/home/leon/Leon/Projects/fmsappv/feedback/modules/utilties.py", line 12, in send_async_email
    raise Exception("Exception occurred in Mail")
Exception: Exception occurred in Mail
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0 回答 0