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# -*- coding: utf-8 -*-
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2021 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT
import logging
import os
import smtplib
import subprocess
from configparser import ConfigParser, SectionProxy
from email.message import EmailMessage
from socket import gethostname
from typing import Optional
from ..internal.constants import mail_template_location, mail_scripts_location
from ..internal.exceptions import XRayMailerError
class Mailer:
"""
Class contains X-Ray e-mail send logic
"""
def __init__(self):
self.logger = logging.getLogger('mailer')
self._sender = None
@property
def mail_server(self) -> tuple:
"""
Local mail server address
"""
return ('localhost', )
@property
def sender(self) -> str:
"""
Retrieve 'From' mail address if it is not already set
"""
if self._sender is None:
self._sender = self.retrieve_mail_sender()
return self._sender
def retrieve_mail_sender(self) -> str:
"""
'From' address (control panel admin or dummy one)
"""
dummy_mail = f"xray.continuous@{gethostname()}"
admin_mail = self.admin_email()
return admin_mail if admin_mail is not None else dummy_mail
def admin_email(self) -> Optional[str]:
"""
Try to retrieve control panel admin e-mail
"""
panel = self.get_control_panel()
if panel is not None:
get_email_script = f'{mail_scripts_location}/{panel}_email'
try:
p = subprocess.run([get_email_script],
capture_output=True, text=True, check=True)
return p.stdout.strip()
except subprocess.CalledProcessError as e:
self.logger.error('% script failed with: %s',
get_email_script, str(e))
except (OSError, ValueError, subprocess.SubprocessError) as e:
self.logger.error('Failed to run script %s with: %s',
get_email_script, str(e))
def get_control_panel(self) -> Optional[str]:
"""
Get control panel name
"""
try:
return subprocess.run(
['cldetect', '--detect-cp-name'],
check=True, text=True,
capture_output=True).stdout.strip()
except (subprocess.CalledProcessError, AttributeError) as e:
self.logger.error('cldetect utility failed with %s',
str(e))
except (OSError, ValueError, subprocess.SubprocessError) as e:
self.logger.error('Failed to run cldetect utility with %s',
str(e))
@staticmethod
def read_template(name: str = 'greeting') -> SectionProxy:
"""
Get preformatted data for e-mail by name of template
"""
tmpl = f'{mail_template_location}/{name}.ini'
if os.path.exists(tmpl):
config = ConfigParser(interpolation=None)
config.read(tmpl)
return config['data']
raise XRayMailerError(
f'Failed to find template {name} in {mail_template_location}')
def _smtp_send(self, message: EmailMessage) -> None:
"""
Send preformatted e-mail via localhost SMTP
"""
self.logger.info('Try to send via smtp')
try:
with smtplib.SMTP(*self.mail_server) as server:
result = server.send_message(message)
self.logger.info('Send result: %s', result)
except smtplib.SMTPException as e:
raise XRayMailerError(f'smtp mailing failed: {str(e)}')
except (ConnectionError, OSError) as e:
raise XRayMailerError(f'smtp connection failed: {str(e)}')
def _console_send(self, message: EmailMessage) -> None:
"""
Send preformatted e-mail via sendmail utility
"""
self.logger.info('Try to send via sendmail utility')
cmd = ["/usr/sbin/sendmail", "-t", "-oi"]
try:
subprocess.run(cmd,
input=message.as_string(),
capture_output=True,
text=True, check=True)
except (OSError, subprocess.CalledProcessError) as e:
raise XRayMailerError(f'sendmail utility failed with {str(e)}')
def _send(self, mail: EmailMessage) -> None:
"""
Try to send mail via localhost smtp server,
if fails -- try to use sendmail utility
"""
try:
self._smtp_send(mail)
except XRayMailerError as e:
self.logger.error(str(e))
try:
self._console_send(mail)
except XRayMailerError as e:
self.logger.error(str(e))
self.logger.critical(
'Both smtp and sendmail failed to send message to %s',
mail['To'])
def send_mail(self,
recipient: str,
template: str = 'greeting',
**kwargs) -> None:
data = self.read_template(template)
msg = EmailMessage()
msg['Subject'] = data['subject']
msg['From'] = self.sender
msg['To'] = recipient
msg.set_content(data['text'] % kwargs)
msg.add_alternative(data['html'] % kwargs, subtype='html')
self.logger.info('Generated mail --> %s', msg.as_string())
self._send(msg)