tasks.py

"""
You will need::

    - an activated virtualenv with celery installed
    - a rabbitmq on localhost running

There must be a running celery worker running::

    celery -A tasks worker --loglevel=info &

This script will send 20 mails to random emails on the mailinator.com service you can then
view the inbox on the provided url.

With the default configuration celery worker will accept 4 parallel task.
And you can send more mails in a bulk mailer in one task.

"""
import time
import random
import string

# Import smtplib for the actual sending function
import smtplib

# Import the email modules we'll need
from email.mime.text import MIMEText

# import celery
from celery import Celery


celery = Celery('tasks', backend='amqp', broker='amqp://')


@celery.task
def blocking_sleep(sec):
    time.sleep(sec)


def generate_mail():

    char_set = string.ascii_uppercase + string.digits
    random_name = ''.join(random.sample(char_set*6,6))
    print 'http://mailinator.com/inbox.jsp?to=' + random_name
    return random_name + '@mailinator.com'


@celery.task
def send_mail(to=None, text=None, sub=None, from_=None):


    text = text or "Test body."
    sub = sub or str(time.time())
    from_  = from_ or "iusedtobeaspamerlikeu@example.com"
    to = to or generate_mail()
    msg = MIMEText("test")
    msg['Subject'] = sub
    msg['From'] = from_
    msg['To'] = to
    s = smtplib.SMTP('mailinator.com')
    s.sendmail(from_, [to], msg.as_string())
    s.quit()
    return to

if __name__ == "__main__":
    for i in range(20):
        # delay makes it async
        mail = generate_mail()
        send_mail.delay(mail)