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import smtplib
from threading import Thread
from django.conf import settings
from django.core.mail import EmailMultiAlternatives
from django.template.loader import render_to_string as render
class EmailThread(Thread):
MAX_TRIES = 3
def __init__(self, subject, text, html, to, headers):
Thread.__init__(self)
self.subject = subject
self.text = text
self.html = html
self.to = to
self.headers = headers
def run(self):
for attempt in range(0, self.MAX_TRIES):
try:
msg = EmailMultiAlternatives(
self.subject, self.text, to=(self.to,), headers=self.headers
)
msg.attach_alternative(self.html, "text/html")
msg.send()
except smtplib.SMTPServerDisconnected as e:
if attempt + 1 == self.MAX_TRIES:
# This was the last attempt and it failed:
# re-raise the exception
raise e
else:
# There was no exception, break out of the retry loop
break
def send(name, to, ctx, headers={}):
ctx["SITE_ROOT"] = settings.SITE_ROOT
subject = render("emails/%s-subject.html" % name, ctx).strip()
text = render("emails/%s-body-text.html" % name, ctx)
html = render("emails/%s-body-html.html" % name, ctx)
t = EmailThread(subject, text, html, to, headers)
if hasattr(settings, "BLOCKING_EMAILS"):
# In tests, we send emails synchronously
# so we can inspect the outgoing messages
t.run()
else:
# Outside tests, we send emails on thread,
# so there is no delay for the user.
t.start()
def login(to, ctx):
send("login", to, ctx)
def transfer_request(to, ctx):
send("transfer-request", to, ctx)
def alert(to, ctx, headers={}):
send("alert", to, ctx, headers)
def verify_email(to, ctx):
send("verify-email", to, ctx)
def report(to, ctx, headers={}):
send("report", to, ctx, headers)
def deletion_notice(to, ctx, headers={}):
send("deletion-notice", to, ctx, headers)
def sms_limit(to, ctx):
send("sms-limit", to, ctx)
def call_limit(to, ctx):
send("phone-call-limit", to, ctx)
def sudo_code(to, ctx):
send("sudo-code", to, ctx)