app-MAIL-temp/app/email/spam.py
Son Nguyen Kim 5ac78f2694 reformat
2021-09-08 11:29:55 +02:00

64 lines
2.0 KiB
Python

import asyncio
import time
from email.message import Message
import aiospamc
from app.config import SPAMASSASSIN_HOST
from app.email_utils import to_bytes
from app.log import LOG
from app.models import EmailLog
from app.spamassassin_utils import SpamAssassin
async def get_spam_score_async(message: Message) -> float:
sa_input = to_bytes(message)
# Spamassassin requires to have an ending linebreak
if not sa_input.endswith(b"\n"):
LOG.d("add linebreak to spamassassin input")
sa_input += b"\n"
try:
# wait for at max 300s which is the default spamd timeout-child
response = await asyncio.wait_for(
aiospamc.check(sa_input, host=SPAMASSASSIN_HOST), timeout=300
)
return response.headers["Spam"].score
except asyncio.TimeoutError:
LOG.e("SpamAssassin timeout")
# return a negative score so the message is always considered as ham
return -999
except Exception:
LOG.e("SpamAssassin exception")
return -999
def get_spam_score(
message: Message, email_log: EmailLog, can_retry=True
) -> (float, dict):
"""
Return the spam score and spam report
"""
LOG.d("get spam score for %s", email_log)
sa_input = to_bytes(message)
# Spamassassin requires to have an ending linebreak
if not sa_input.endswith(b"\n"):
LOG.d("add linebreak to spamassassin input")
sa_input += b"\n"
try:
# wait for at max 300s which is the default spamd timeout-child
sa = SpamAssassin(sa_input, host=SPAMASSASSIN_HOST, timeout=300)
return sa.get_score(), sa.get_report_json()
except Exception:
if can_retry:
LOG.w("SpamAssassin exception, retry")
time.sleep(3)
return get_spam_score(message, email_log, can_retry=False)
else:
# return a negative score so the message is always considered as ham
LOG.e("SpamAssassin exception, ignore spam check")
return -999, None