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#!/usr/bin/env python3
#
# Script to send off all queued email.
#
# This script is intended to be run frequently from cron. We queue things
# up in the db so that they get automatically rolled back as necessary,
# but once we reach this point we're just going to send all of them one
# by one.
#
import sys
import os
import smtplib
# Set up to run in django environment
sys.path.append(os.path.join(os.path.abspath(os.path.dirname(sys.argv[0])), '../../'))
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "pgcommitfest.settings")
import django
django.setup()
from django.db import connection, transaction
from pgcommitfest.mailqueue.models import QueuedMail
if __name__ == "__main__":
# Grab advisory lock, if available. Lock id is just a random number
# since we only need to interlock against ourselves. The lock is
# automatically released when we're done.
curs = connection.cursor()
curs.execute("SELECT pg_try_advisory_lock(72181379)")
if not curs.fetchall()[0][0]:
print("Failed to get advisory lock, existing send_queued_mail process stuck?")
connection.close()
sys.exit(1)
for m in QueuedMail.objects.all():
# Yes, we do a new connection for each run. Just because we can.
# If it fails we'll throw an exception and just come back on the
# next cron job. And local delivery should never fail...
smtp = smtplib.SMTP("localhost")
smtp.sendmail(m.sender, m.receiver, m.fullmsg.encode('utf-8'))
smtp.close()
m.delete()
transaction.commit()
connection.close()
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