import re
import socket
import time
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.utils import formatdate
from http import HTTPStatus
from smtplib import SMTP_SSL as SMTP
from loguru import logger
from starlette.exceptions import HTTPException
def valid_email(s):
# https://regexr.com/2rhq7
pat = "[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?"
if re.match(pat, s):
return True
msg = f"SMTP - invalid email: {s}."
logger.error(msg)
raise HTTPException(status_code=HTTPStatus.BAD_REQUEST, detail=msg)
async def send_mail(emailaddress, email):
valid_email(emailaddress.email)
valid_email(email.receiver)
ts = time.time()
date = formatdate(ts, True)
msg = MIMEMultipart("alternative")
msg = MIMEMultipart("alternative")
msg["Date"] = date
msg["Subject"] = email.subject
msg["From"] = emailaddress.email
msg["To"] = email.receiver
signature = "Email sent anonymiously by LNbits Sendmail extension."
text = (
"""\
"""
+ email.message
+ """
"""
+ signature
+ """
"""
)
html = (
"""\
"""
+ email.message
+ """
"""
+ signature
+ """
"""
)
part1 = MIMEText(text, "plain")
part2 = MIMEText(html, "html")
msg.attach(part1)
msg.attach(part2)
try:
conn = SMTP(
host=emailaddress.smtp_server, port=emailaddress.smtp_port, timeout=10
)
logger.debug("SMTP - connected to smtp server.")
# conn.set_debuglevel(True)
except:
msg = f"SMTP - error connecting to smtp server: {emailaddress.smtp_server}:{emailaddress.smtp_port}."
logger.error(msg)
raise HTTPException(status_code=HTTPStatus.BAD_REQUEST, detail=msg)
try:
conn.login(emailaddress.smtp_user, emailaddress.smtp_password)
logger.debug("SMTP - successful login to smtp server.")
except:
msg = f"SMTP - error login into smtp {emailaddress.smtp_user}."
logger.error(msg)
raise HTTPException(status_code=HTTPStatus.BAD_REQUEST, detail=msg)
try:
conn.sendmail(emailaddress.email, email.receiver, msg.as_string())
logger.debug("SMTP - successfully send email.")
except socket.error as e:
msg = f"SMTP - error sending email: {str(e)}."
logger.error(msg)
raise HTTPException(status_code=HTTPStatus.BAD_REQUEST, detail=msg)
finally:
conn.quit()