Initial Awawawa

web/patchbay_web/mailer.py

@@ -0,0 +1,43 @@
+"""Outgoing mail for 2FA codes, using the Mail* settings in patchbay.conf."""
+
+import smtplib
+import ssl
+import sys
+from email.message import EmailMessage
+
+
+class MailError(Exception):
+    pass
+
+
+def send(conf, to, subject, body):
+    host = conf.get("mailhost")
+    if not host:
+        raise MailError("mail server is not configured")
+    if host == "log":
+        # Development only: MailHost = log prints mails to the server log.
+        print(f"[mail to {to}] {subject}\n{body}", file=sys.stderr, flush=True)
+        return
+
+    msg = EmailMessage()
+    msg["From"] = conf.get("mailfrom") or conf.get("mailuser")
+    msg["To"] = to
+    msg["Subject"] = subject
+    msg.set_content(body)
+
+    port = conf.getint("mailport", 587)
+    security = (conf.get("mailsecurity") or "starttls").lower()
+    ctx = ssl.create_default_context()
+    try:
+        if security == "ssl":
+            server = smtplib.SMTP_SSL(host, port, context=ctx, timeout=20)
+        else:
+            server = smtplib.SMTP(host, port, timeout=20)
+        with server:
+            if security == "starttls":
+                server.starttls(context=ctx)
+            if conf.get("mailuser"):
+                server.login(conf.get("mailuser"), conf.get("mailpassword"))
+            server.send_message(msg)
+    except (OSError, smtplib.SMTPException) as e:
+        raise MailError(str(e)) from e