mirror of
https://github.com/simple-login/app.git
synced 2024-11-18 01:40:38 +01:00
131 lines
4 KiB
Python
131 lines
4 KiB
Python
import time
|
|
from concurrent.futures import ThreadPoolExecutor
|
|
from mailbox import Message
|
|
from smtplib import SMTP, SMTPServerDisconnected, SMTPRecipientsRefused
|
|
from typing import Optional, Dict
|
|
|
|
import newrelic.agent
|
|
from attr import dataclass
|
|
|
|
from app.config import (
|
|
NOT_SEND_EMAIL,
|
|
POSTFIX_SUBMISSION_TLS,
|
|
POSTFIX_PORT,
|
|
POSTFIX_SERVER,
|
|
)
|
|
from app.email import headers
|
|
from app.log import LOG
|
|
from app.message_utils import message_to_bytes
|
|
|
|
|
|
@dataclass
|
|
class SendRequest:
|
|
envelope_from: str
|
|
envelope_to: str
|
|
msg: Message
|
|
mail_options: Dict = {}
|
|
rcpt_options: Dict = {}
|
|
is_forward: bool = False
|
|
ignore_smtp_errors: bool = False
|
|
|
|
|
|
class MailSender:
|
|
def __init__(self):
|
|
self._pool: Optional[ThreadPoolExecutor] = None
|
|
|
|
def enable_background_pool(self, max_workers=10):
|
|
self._pool = ThreadPoolExecutor(max_workers=max_workers)
|
|
|
|
def send(self, send_request: SendRequest, retries: int = 2):
|
|
"""replace smtp.sendmail"""
|
|
if NOT_SEND_EMAIL:
|
|
LOG.d(
|
|
"send email with subject '%s', from '%s' to '%s'",
|
|
send_request.msg[headers.SUBJECT],
|
|
send_request.msg[headers.FROM],
|
|
send_request.msg[headers.TO],
|
|
)
|
|
return
|
|
if not self._pool:
|
|
self._send_to_smtp(send_request, retries)
|
|
else:
|
|
self._pool.submit(self._send_to_smtp, (send_request, retries))
|
|
|
|
def _send_to_smtp(self, send_request: SendRequest, retries: int):
|
|
try:
|
|
start = time.time()
|
|
if POSTFIX_SUBMISSION_TLS:
|
|
smtp_port = 587
|
|
else:
|
|
smtp_port = POSTFIX_PORT
|
|
|
|
with SMTP(POSTFIX_SERVER, smtp_port) as smtp:
|
|
if POSTFIX_SUBMISSION_TLS:
|
|
smtp.starttls()
|
|
|
|
elapsed = time.time() - start
|
|
LOG.d("getting a smtp connection takes seconds %s", elapsed)
|
|
newrelic.agent.record_custom_metric(
|
|
"Custom/smtp_connection_time", elapsed
|
|
)
|
|
|
|
# smtp.send_message has UnicodeEncodeError
|
|
# encode message raw directly instead
|
|
LOG.d(
|
|
"Sendmail mail_from:%s, rcpt_to:%s, header_from:%s, header_to:%s, header_cc:%s",
|
|
send_request.envelope_from,
|
|
send_request.envelope_to,
|
|
send_request.msg[headers.FROM],
|
|
send_request.msg[headers.TO],
|
|
send_request.msg[headers.CC],
|
|
)
|
|
smtp.sendmail(
|
|
send_request.envelope_from,
|
|
send_request.envelope_to,
|
|
message_to_bytes(send_request.msg),
|
|
send_request.mail_options,
|
|
send_request.rcpt_options,
|
|
)
|
|
|
|
newrelic.agent.record_custom_metric(
|
|
"Custom/smtp_sending_time", time.time() - start
|
|
)
|
|
except (SMTPServerDisconnected, SMTPRecipientsRefused) as e:
|
|
if retries > 0:
|
|
LOG.w(
|
|
"SMTPServerDisconnected or SMTPRecipientsRefused error %s, retry",
|
|
e,
|
|
exc_info=True,
|
|
)
|
|
time.sleep(0.3 * send_request.retries)
|
|
self._send_to_smtp(send_request, retries - 1)
|
|
else:
|
|
if send_request.ignore_smtp_error:
|
|
LOG.w("Ignore smtp error %s", e)
|
|
else:
|
|
raise
|
|
|
|
|
|
mail_sender = MailSender()
|
|
|
|
|
|
def sl_sendmail(
|
|
envelope_from: str,
|
|
envelope_to: str,
|
|
msg: Message,
|
|
mail_options=(),
|
|
rcpt_options=(),
|
|
is_forward: bool = False,
|
|
retries=2,
|
|
ignore_smtp_error=False,
|
|
):
|
|
send_request = SendRequest(
|
|
envelope_from,
|
|
envelope_to,
|
|
msg,
|
|
mail_options,
|
|
rcpt_options,
|
|
is_forward,
|
|
ignore_smtp_error,
|
|
)
|
|
mail_sender.send(send_request, retries)
|