mirror of
https://github.com/healthchecks/healthchecks.git
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125 lines
3.5 KiB
Python
125 lines
3.5 KiB
Python
from __future__ import annotations
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import time
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from email.utils import make_msgid
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from smtplib import SMTPDataError, SMTPServerDisconnected
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from threading import Thread
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from django.conf import settings
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from django.core.mail import EmailMultiAlternatives
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from django.template.loader import render_to_string as render
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class EmailThread(Thread):
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MAX_TRIES = 3
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def __init__(self, message):
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Thread.__init__(self)
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self.message = message
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def run(self):
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for attempt in range(0, self.MAX_TRIES):
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try:
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# Make sure each retry creates a new connection:
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self.message.connection = None
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self.message.send()
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# No exception--great! Return from the retry loop
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return
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except (SMTPServerDisconnected, SMTPDataError) as e:
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if attempt + 1 == self.MAX_TRIES:
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# This was the last attempt and it failed:
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# re-raise the exception
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raise e
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# Wait 1s before retrying
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time.sleep(1)
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def make_message(name, to, ctx, headers={}):
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subject = render("emails/%s-subject.html" % name, ctx).strip()
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body = render("emails/%s-body-text.html" % name, ctx)
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html = render("emails/%s-body-html.html" % name, ctx)
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domain = settings.DEFAULT_FROM_EMAIL.split("@")[-1].strip(">")
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headers["Message-ID"] = make_msgid(domain=domain)
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# Make sure the From: header contains our display From: address
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if "From" not in headers:
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headers["From"] = settings.DEFAULT_FROM_EMAIL
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# If EMAIL_MAIL_FROM_TMPL is set, prepare a custom MAIL FROM address
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bounce_id = headers.pop("X-Bounce-ID", "bounces")
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if settings.EMAIL_MAIL_FROM_TMPL:
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from_email = settings.EMAIL_MAIL_FROM_TMPL % bounce_id
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else:
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from_email = settings.DEFAULT_FROM_EMAIL
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msg = EmailMultiAlternatives(
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subject, body, from_email=from_email, to=(to,), headers=headers
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)
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msg.attach_alternative(html, "text/html")
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return msg
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def send(msg, block=False):
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assert settings.EMAIL_HOST, (
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"No SMTP configuration,"
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" see https://github.com/healthchecks/healthchecks#sending-emails"
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)
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t = EmailThread(msg)
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if block or hasattr(settings, "BLOCKING_EMAILS"):
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# In tests, we send emails synchronously
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# so we can inspect the outgoing messages
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t.run()
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else:
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# Outside tests, we send emails on thread,
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# so there is no delay for the user.
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t.start()
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def login(to, ctx):
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send(make_message("login", to, ctx))
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def transfer_request(to, ctx):
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send(make_message("transfer-request", to, ctx))
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def alert(to, ctx, headers={}):
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send(make_message("alert", to, ctx, headers=headers))
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def verify_email(to, ctx):
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send(make_message("verify-email", to, ctx))
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def report(to, ctx, headers={}):
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m = make_message("report", to, ctx, headers=headers)
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send(m, block=True)
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def deletion_notice(to, ctx, headers={}):
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m = make_message("deletion-notice", to, ctx, headers=headers)
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send(m, block=True)
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def deletion_scheduled(to, ctx, headers={}):
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m = make_message("deletion-scheduled", to, ctx, headers=headers)
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send(m, block=True)
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def sms_limit(to, ctx):
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send(make_message("sms-limit", to, ctx))
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def call_limit(to, ctx):
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send(make_message("phone-call-limit", to, ctx))
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def sudo_code(to, ctx):
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send(make_message("sudo-code", to, ctx))
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def signal_rate_limited(to, ctx):
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send(make_message("signal-rate-limited", to, ctx))
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