69 lines
2.5 KiB
Python
69 lines
2.5 KiB
Python
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# app/services/mailer.py
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import smtplib
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import ssl
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from email.message import EmailMessage
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from typing import Optional
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from loguru import logger
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from app.core.config import get_app_settings
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def _build_message(*, from_email: str, to_email: str, subject: str, html: str) -> EmailMessage:
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msg = EmailMessage()
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msg["From"] = from_email
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msg["To"] = to_email
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msg["Subject"] = subject
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msg.set_content("Your email client does not support HTML.")
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msg.add_alternative(html, subtype="html")
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return msg
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def send_email(to_email: str, subject: str, html: str) -> bool:
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"""
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同步发送；成功返回 True，失败返回 False，并打印详细日志。
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- 端口 465：使用 SMTP_SSL
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- 其他端口：使用 SMTP + (可选)STARTTLS
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"""
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s = get_app_settings()
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from_email = str(s.mail_from)
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smtp_host = s.smtp_host
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smtp_port = int(s.smtp_port)
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smtp_user: Optional[str] = s.smtp_user.get_secret_value() if s.smtp_user else None
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smtp_pass: Optional[str] = s.smtp_password.get_secret_value() if s.smtp_password else None
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msg = _build_message(from_email=from_email, to_email=to_email, subject=subject, html=html)
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logger.info(
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"SMTP send start → host={} port={} tls={} from={} to={}",
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smtp_host, smtp_port, s.smtp_tls, from_email, to_email,
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)
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try:
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if smtp_port == 465:
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context = ssl.create_default_context()
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with smtplib.SMTP_SSL(smtp_host, smtp_port, context=context, timeout=20) as server:
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if smtp_user and smtp_pass:
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server.login(smtp_user, smtp_pass)
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server.send_message(msg)
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else:
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with smtplib.SMTP(smtp_host, smtp_port, timeout=20) as server:
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server.ehlo()
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if s.smtp_tls:
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context = ssl.create_default_context()
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server.starttls(context=context)
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server.ehlo()
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if smtp_user and smtp_pass:
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server.login(smtp_user, smtp_pass)
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server.send_message(msg)
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logger.info("SMTP send OK to {}", to_email)
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return True
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except smtplib.SMTPResponseException as e:
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# 能拿到服务端 code/resp 的错误
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logger.error("SMTPResponseException: code={} msg={}", getattr(e, "smtp_code", None), getattr(e, "smtp_error", None))
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return False
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except Exception as e:
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logger.exception("SMTP send failed: {}", e)
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return False
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