zulip/zproject/email_backends.py

91 lines
3.4 KiB
Python

import configparser
import logging
from typing import List
from django.conf import settings
from django.core.mail import EmailMultiAlternatives
from django.core.mail.backends.smtp import EmailBackend
from django.template import loader
def get_forward_address() -> str:
config = configparser.ConfigParser()
config.read(settings.FORWARD_ADDRESS_CONFIG_FILE)
try:
return config.get("DEV_EMAIL", "forward_address")
except (configparser.NoSectionError, configparser.NoOptionError):
return ""
def set_forward_address(forward_address: str) -> None:
config = configparser.ConfigParser()
config.read(settings.FORWARD_ADDRESS_CONFIG_FILE)
if not config.has_section("DEV_EMAIL"):
config.add_section("DEV_EMAIL")
config.set("DEV_EMAIL", "forward_address", forward_address)
with open(settings.FORWARD_ADDRESS_CONFIG_FILE, "w") as cfgfile:
config.write(cfgfile)
class EmailLogBackEnd(EmailBackend):
@staticmethod
def log_email(email: EmailMultiAlternatives) -> None:
"""Used in development to record sent emails in a nice HTML log"""
html_message = "Missing HTML message"
if len(email.alternatives) > 0:
html_message = email.alternatives[0][0]
context = {
"subject": email.subject,
"from_email": email.from_email,
"reply_to": email.reply_to,
"recipients": email.to,
"body": email.body,
"html_message": html_message,
}
new_email = loader.render_to_string("zerver/email.html", context)
# Read in the pre-existing log, so that we can add the new entry
# at the top.
try:
with open(settings.EMAIL_CONTENT_LOG_PATH) as f:
previous_emails = f.read()
except FileNotFoundError:
previous_emails = ""
with open(settings.EMAIL_CONTENT_LOG_PATH, "w+") as f:
f.write(new_email + previous_emails)
@staticmethod
def prepare_email_messages_for_forwarding(email_messages: List[EmailMultiAlternatives]) -> None:
localhost_email_images_base_uri = settings.ROOT_DOMAIN_URI + "/static/images/emails"
czo_email_images_base_uri = "https://chat.zulip.org/static/images/emails"
for email_message in email_messages:
html_alternative = list(email_message.alternatives[0])
# Here, we replace the email addresses used in development
# with chat.zulip.org, so that web email providers like Gmail
# will be able to fetch the illustrations used in the emails.
html_alternative[0] = html_alternative[0].replace(
localhost_email_images_base_uri, czo_email_images_base_uri
)
email_message.alternatives[0] = tuple(html_alternative)
email_message.to = [get_forward_address()]
def send_messages(self, email_messages: List[EmailMultiAlternatives]) -> int:
num_sent = len(email_messages)
if get_forward_address():
self.prepare_email_messages_for_forwarding(email_messages)
num_sent = super().send_messages(email_messages)
if settings.DEVELOPMENT_LOG_EMAILS:
for email in email_messages:
self.log_email(email)
email_log_url = settings.ROOT_DOMAIN_URI + "/emails"
logging.info("Emails sent in development are available at %s", email_log_url)
return num_sent