106 lines
3.4 KiB
Python
106 lines
3.4 KiB
Python
"""邮件发送服务 - SMTP email sending for alarm notifications and report delivery."""
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import logging
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import smtplib
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import ssl
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from email.mime.multipart import MIMEMultipart
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from email.mime.text import MIMEText
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from email.mime.base import MIMEBase
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from email import encoders
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from pathlib import Path
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from typing import Optional
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from app.core.config import get_settings
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logger = logging.getLogger("email_service")
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async def send_email(
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to: list[str],
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subject: str,
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body_html: str,
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attachments: Optional[list[str]] = None,
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) -> bool:
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"""
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Send an email via SMTP.
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Args:
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to: List of recipient email addresses.
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subject: Email subject line.
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body_html: HTML body content.
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attachments: Optional list of file paths to attach.
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Returns:
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True if sent successfully, False otherwise.
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"""
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settings = get_settings()
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if not settings.SMTP_ENABLED:
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logger.warning("SMTP is not enabled (SMTP_ENABLED=False). Skipping email send.")
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return False
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if not settings.SMTP_HOST:
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logger.warning("SMTP_HOST is not configured. Skipping email send.")
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return False
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if not to:
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logger.warning("No recipients specified. Skipping email send.")
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return False
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try:
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msg = MIMEMultipart("mixed")
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msg["From"] = settings.SMTP_FROM
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msg["To"] = ", ".join(to)
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msg["Subject"] = subject
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# HTML body
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html_part = MIMEText(body_html, "html", "utf-8")
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msg.attach(html_part)
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# Attachments
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if attachments:
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for filepath in attachments:
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path = Path(filepath)
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if not path.exists():
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logger.warning(f"Attachment not found, skipping: {filepath}")
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continue
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with open(path, "rb") as f:
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part = MIMEBase("application", "octet-stream")
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part.set_payload(f.read())
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encoders.encode_base64(part)
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part.add_header(
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"Content-Disposition",
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f'attachment; filename="{path.name}"',
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)
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msg.attach(part)
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# Send via SMTP
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context = ssl.create_default_context()
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if settings.SMTP_PORT == 465:
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# SSL connection
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with smtplib.SMTP_SSL(settings.SMTP_HOST, settings.SMTP_PORT, context=context) as server:
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if settings.SMTP_USER and settings.SMTP_PASSWORD:
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server.login(settings.SMTP_USER, settings.SMTP_PASSWORD)
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server.sendmail(settings.SMTP_FROM, to, msg.as_string())
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else:
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# STARTTLS connection (port 587 or 25)
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with smtplib.SMTP(settings.SMTP_HOST, settings.SMTP_PORT) as server:
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server.ehlo()
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if settings.SMTP_PORT == 587:
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server.starttls(context=context)
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server.ehlo()
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if settings.SMTP_USER and settings.SMTP_PASSWORD:
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server.login(settings.SMTP_USER, settings.SMTP_PASSWORD)
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server.sendmail(settings.SMTP_FROM, to, msg.as_string())
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logger.info(f"Email sent successfully to {to}, subject: {subject}")
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return True
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except smtplib.SMTPException as e:
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logger.error(f"SMTP error sending email to {to}: {e}")
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return False
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except Exception as e:
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logger.error(f"Unexpected error sending email to {to}: {e}")
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return False
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