python之当 DEBUG=False 时 Flask mail 不发送邮件

我正在编写一个基于 Miguel Grinberg 的 Flasky 的小型 Web 应用程序.我对用户确认电子邮件使用完全相同的代码。当 DEBUG=True(对于 Flask)时，一切都像一个魅力。但是，当 DEBUG=False 时，我收到以下错误:

Traceback (most recent call last): 
 File "/usr/lib/python3.4/threading.py", line 920, in _bootstrap_inner 
    self.run() 
 File "/usr/lib/python3.4/threading.py", line 868, in run 
 self._target(*self._args, **self._kwargs) 
 File "/home/fabee/code/rowbot/app/email.py", line 9, in send_async_email 
    mail.send(msg) 
  File "/usr/local/lib/python3.4/dist-packages/flask_mail.py", line 491, in send 
    with self.connect() as connection: 
  File "/usr/local/lib/python3.4/dist-packages/flask_mail.py", line 144, in __enter__ 
self.host = self.configure_host() 
  File "/usr/local/lib/python3.4/dist-packages/flask_mail.py", line 163, in configure_host 
host.starttls() 
  File "/usr/lib/python3.4/smtplib.py", line 671, in starttls 
self.ehlo_or_helo_if_needed() 
  File "/usr/lib/python3.4/smtplib.py", line 569, in ehlo_or_helo_if_needed 
if not (200 <= self.ehlo()[0] <= 299): 
  File "/usr/lib/python3.4/smtplib.py", line 423, in ehlo 
self.putcmd(self.ehlo_msg, name or self.local_hostname) 
  File "/usr/lib/python3.4/smtplib.py", line 349, in putcmd 
self.send(str) 
  File "/usr/lib/python3.4/smtplib.py", line 341, in send 
raise SMTPServerDisconnected('please run connect() first') 
smtplib.SMTPServerDisconnected: please run connect() first 

我发现这真的很难调试，因为我并不真正理解 DEBUG=True 的真正含义。非常感谢任何提示和帮助。

编辑:代码

这是带有电子邮件方法的文件:

from threading import Thread 
from flask import current_app, render_template 
from flask.ext.mail import Message 
from . import mail 
 
 
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['MAIL_SUBJECT_PREFIX'] + ' ' + subject, 
                  sender=app.config['MAIL_SENDER'], recipients=[to]) 
    msg.body = render_template(template + '.txt', **kwargs) 
    msg.html = render_template(template + '.html', **kwargs) 
 
    thr = Thread(target=send_async_email, args=[app, msg]) 
    thr.start() 
    return thr 

这是创建 mail 的代码:

bootstrap = Bootstrap() 
mail = Mail() 
moment = Moment() 
db = SQLAlchemy() 
pagedown = PageDown() 
 
login_manager = LoginManager() 
login_manager.session_protection = 'strong' 
login_manager.login_view = 'auth.login' 
 
 
def create_app(config_name): 
    app = Flask(__name__) 
    QRcode(app) 
    app.config.from_object(config[config_name]) 
    config[config_name].init_app(app) 
 
    bootstrap.init_app(app) 
    mail.init_app(app) 
    moment.init_app(app) 
    db.init_app(app) 
    login_manager.init_app(app) 
    pagedown.init_app(app) 
 
    if not app.debug and not app.testing and not app.config['SSL_DISABLE']: 
        from flask.ext.sslify import SSLify 
        sslify = SSLify(app) 
 
    from .main import main as main_blueprint 
    app.register_blueprint(main_blueprint) 
 
    from .auth import auth as auth_blueprint 
    app.register_blueprint(auth_blueprint, url_prefix='/auth') 
 
 
    ... 
 
    return app 

这是发送电子邮件的地方:

@auth.route('/register', methods=['GET', 'POST']) 
def register(): 
    form = RegistrationForm() 
    if form.validate_on_submit(): 
        user = User(email=form.email.data, 
                    username=form.username.data, 
                    password=form.password.data, 
                    name=form.realname.data, 
                    role_id=Role.query.filter_by(name='User').first().id) 
        db.session.add(user) 
        db.session.commit() 
        confirm_token = user.generate_token() 
        reject_token = user.generate_token(action='reject') 
        for admin in User.admins(): 
            send_email(admin.email, 'Please Confirm Row-Bot Account for User {0} ({1})'.format(user.username, user.name), 
                   'auth/email/register', user=user, confirm_token=confirm_token, reject_token=reject_token) 
        flash('A request email has been sent to our admins.') 
        return redirect(url_for('auth.login')) 
    return render_template('auth/register.html', form=form) 

请您参考如下方法:

无法弄清楚你哪里出错了，但你能尝试匹配这个吗

from flask import Flask, current_app 
 
from flask_mail import Mail, Message 
 
import threading 
#mail = Mail() 
app = Flask(__name__) 
 
#DEBUG = True 
 
 
app.config['MAIL_SERVER']='smtp.gmail.com' 
app.config['MAIL_PORT']= 587 
app.config['MAIL_USE_TLS'] = True 
app.config['MAIL_USE_SSL']= False 
app.config['MAIL_USERNAME'] = 'EMAIL_ID' 
app.config['MAIL_PASSWORD'] = 'PASSWORD' 
 
mail = Mail(app) 
 
@app.route('/') 
def send_mail(): 
    send_email('EMAIL_TO') 
    return "Sent" 
 
 
def send_async_email(app, msg): 
    with app.app_context(): 
        mail.send(msg) 
        print "sent" 
 
def send_email(to): 
    app = current_app._get_current_object() 
    msg = Message(subject='hello', 
                  sender='SENDER', recipients=[to]) 
    thr = threading.Thread(target=send_async_email, args=[app, msg]) 
    thr.start() 
    return thr 
 
#def send_email() 
 
if __name__ == "__main__": 
    app.run() 

如果还有问题请在下方留言

DEBUG = True 表示应用程序正在 Debug模式下运行，如果有任何错误，将打印完整的堆栈跟踪。如果您不在 Debug模式下运行，那么它只会给出一个错误，例如 Internal Server error 或其他错误。