使用Flask-Mail异步导致“RuntimeError：在应用程序上下文之外工作” [英] Using Flask-Mail asynchronously results in "RuntimeError: working outside of application context"

问题描述

我试图发送一些邮件异步（基于在 The Flask Mega-Tutorial，Part XI：Email Support ）。但是，我得到以下关于在应用程序上下文之外工作的错误。如何解决这个问题？
$ b $ pre $ Traceback（最近一次调用最后一次）：
文件C：\ Users \Primoz\Desktop\RecycleFlaskServer\recycleserver\helpers.py，第17行，在send_async_email
mail.send（msg）
文件C：\Python33\lib\ site-packages\flask_mail-0.9.0-py3.3.egg\flask_mail.py，第434行，发送
message.send（连接）
文件C：\Python33\\ \\ lib \site-packages\flask_mail-0.9.0-py3.3.egg\flask_mail.py，第369行，发送
connection.send（self）
文件C： \Python33\lib\site-packages\flask_mail-0.9.0-py3.3.egg\flask_mail.py，第173行，发送
email_dispatched.send（message，app = current_app。 _get_current_object（））
文件C：\Python33\lib\site-packages\werkzeug-0.9.4-py3.3.egg\werkzeug\local.py，第297行，在_get_current_object
返回self .__ local（）
文件C：\Python33\\ \\ lib \ site-packages \flask-0.10.1-py3.3.egg\flask\globals.py，第34行，在_find_app
中引发RuntimeError（'在应用程序上下文之外工作'）
RuntimeError：在应用程序环境之外工作


  from flask import Flask 
 from flask.ext.mail import Mail 
 app = Flask（__ name__）
 app.config.from_object（'recycleserver.settings'）
 mail =应用程序
 
 def async（f）：
 def wrapper（* args，** kwargs）：
 thr = Thread（target = f， args = args，kwargs = kwargs）
 thr.start（）
返回包装
 $ b @async 
 def send_async_email（msg）：
 mail.send （msg）
 
 def send_simple_mail（subject，sender，to_who，text_body =，html_body =）：
 msg =信息（subject = subject，sender = sender，recipients = to_who ）
 msg.body = text_body 
 msg.html = html_body 
 send_async_email（msg）
  

< div类=h2_lin>解决方案

代码应该在应用上下文中运行。用app.app_context（）添加（）：
$ b

  @async $ b $ （）：
 mail.send（msg）
  

send_async_email

I am trying to send some mail asynchronously (based on the code in The Flask Mega-Tutorial, Part XI: Email Support). However, I get the following error about working outside an application context. How do I fix this problem?

Traceback (most recent call last):
  File "C:\Users\Primoz\Desktop\RecycleFlaskServer\recycleserver\helpers.py", line 17, in send_async_email
    mail.send(msg)
  File "C:\Python33\lib\site-packages\flask_mail-0.9.0-py3.3.egg\flask_mail.py", line 434, in send
    message.send(connection)
  File "C:\Python33\lib\site-packages\flask_mail-0.9.0-py3.3.egg\flask_mail.py", line 369, in send
    connection.send(self)
  File "C:\Python33\lib\site-packages\flask_mail-0.9.0-py3.3.egg\flask_mail.py", line 173, in send
    email_dispatched.send(message, app=current_app._get_current_object())
  File "C:\Python33\lib\site-packages\werkzeug-0.9.4-py3.3.egg\werkzeug\local.py", line 297, in _get_current_object
    return self.__local()
  File "C:\Python33\lib\site-packages\flask-0.10.1-py3.3.egg\flask\globals.py", line 34, in _find_app
    raise RuntimeError('working outside of application context')
RuntimeError: working outside of application context

from flask import Flask
from flask.ext.mail import Mail
app = Flask(__name__)
app.config.from_object('recycleserver.settings')
mail = Mail(app)

def async(f):
    def wrapper(*args, **kwargs):
        thr = Thread(target = f, args = args, kwargs = kwargs)
        thr.start()
    return wrapper

@async
def send_async_email(msg):
    mail.send(msg)

def send_simple_mail(subject, sender, to_who, text_body="", html_body=""):
    msg = Message(subject=subject,sender=sender, recipients=to_who)
    msg.body = text_body
    msg.html = html_body
    send_async_email(msg)

解决方案

The code should run in an app context. Add with app.app_context():

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

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