I am trying to send emails asynchronously with in Flask with gevent via flask-mail. I am getting "working outside of application context". I am aware of with app.app_context() but I cannot get it to work with my setup.
My application is created with an application factory like this:
myproject/run_dev.py
from gevent.wsgi import WSGIServer
from my_project.app import create_app
from my_project.config import DevConfig
app = create_app(DevConfig)
http_server = WSGIServer(('', 5000), app)
http_server.serve_forever()
myproject/myproject/app.py
def create_app(config=None, app_name=None, blueprints=None):
app = Flask(app_name)
configure_app(app, config)
<other stuff>
return app
And the code that I use to send emails:
myproject/myproject/mymodule/views.py
@mymodule.route('/some/path/')
def do_something():
do_stuff(something)
myproject/myproject/mymodule/utils.py
def do_stuff(something):
send_email(msg)
@async
def send_async_email(msg):
mail.send(msg)
def send_mail(request_id, recipients, email_type, env=None, pool=None):
msg = Message(
sender=sender,
recipients=recipients,
subject=subject,
body=body)
send_async_email(msg)
myproject/myproject/decorators.py
def async(f):
def wrapper(*args, **kwargs):
t = Greenlet.spawn(f, *args, **kwargs)
gevent.joinall([t])
return wrapper
I have tried to add:
from myproject.app import create_app
app = create_app()
with app.app_context():
mail.send(msg)
to send_async_email() but then I get
ImportError: cannot import name create_app
For historical purposes: putting the from myproject.app import create_app
inside the send_async_email
instead of at the top of with the rest of the imports solved the ImportError, because it caused a circular dependency.
You need to define your async function within your view and use the @copy_current_request_context decorator
, so that it can have access to the current request (and app) context.
For details: documentation of flask.copy_current_request_context
.
来源:https://stackoverflow.com/questions/21998039/flask-blueprints-with-gevent-working-outside-of-application-context