/usr/lib/python2.7/dist-packages/celery/utils/mail.py is in python-celery 3.1.20-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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"""
celery.utils.mail
~~~~~~~~~~~~~~~~~
How task error emails are formatted and sent.
"""
from __future__ import absolute_import
import smtplib
import socket
import traceback
import warnings
from email.mime.text import MIMEText
from .functional import maybe_list
try:
from ssl import SSLError
except ImportError: # pragma: no cover
class SSLError(Exception): # noqa
"""fallback used when ssl module not compiled."""
__all__ = ['SendmailWarning', 'Message', 'Mailer', 'ErrorMail']
_local_hostname = None
def get_local_hostname():
global _local_hostname
if _local_hostname is None:
_local_hostname = socket.getfqdn()
return _local_hostname
class SendmailWarning(UserWarning):
"""Problem happened while sending the email message."""
class Message(object):
def __init__(self, to=None, sender=None, subject=None,
body=None, charset='us-ascii'):
self.to = maybe_list(to)
self.sender = sender
self.subject = subject
self.body = body
self.charset = charset
def __repr__(self):
return '<Email: To:{0.to!r} Subject:{0.subject!r}>'.format(self)
def __str__(self):
msg = MIMEText(self.body, 'plain', self.charset)
msg['Subject'] = self.subject
msg['From'] = self.sender
msg['To'] = ', '.join(self.to)
return msg.as_string()
class Mailer(object):
def __init__(self, host='localhost', port=0, user=None, password=None,
timeout=2, use_ssl=False, use_tls=False):
self.host = host
self.port = port
self.user = user
self.password = password
self.timeout = timeout
self.use_ssl = use_ssl
self.use_tls = use_tls
def send(self, message, fail_silently=False, **kwargs):
try:
self._send(message, **kwargs)
except Exception as exc:
if not fail_silently:
raise
warnings.warn(SendmailWarning(
'Mail could not be sent: {0!r} {1!r}\n{2!r}'.format(
exc, {'To': ', '.join(message.to),
'Subject': message.subject},
traceback.format_stack())))
def _send(self, message, **kwargs):
Client = smtplib.SMTP_SSL if self.use_ssl else smtplib.SMTP
client = Client(self.host, self.port, timeout=self.timeout,
local_hostname=get_local_hostname(), **kwargs)
if self.use_tls:
client.ehlo()
client.starttls()
client.ehlo()
if self.user and self.password:
client.login(self.user, self.password)
client.sendmail(message.sender, message.to, str(message))
try:
client.quit()
except SSLError:
client.close()
class ErrorMail(object):
"""Defines how and when task error e-mails should be sent.
:param task: The task instance that raised the error.
:attr:`subject` and :attr:`body` are format strings which
are passed a context containing the following keys:
* name
Name of the task.
* id
UUID of the task.
* exc
String representation of the exception.
* args
Positional arguments.
* kwargs
Keyword arguments.
* traceback
String representation of the traceback.
* hostname
Worker nodename.
"""
# pep8.py borks on a inline signature separator and
# says "trailing whitespace" ;)
EMAIL_SIGNATURE_SEP = '-- '
#: Format string used to generate error email subjects.
subject = """\
[{hostname}] Error: Task {name} ({id}): {exc!r}
"""
#: Format string used to generate error email content.
body = """
Task {{name}} with id {{id}} raised exception:\n{{exc!r}}
Task was called with args: {{args}} kwargs: {{kwargs}}.
The contents of the full traceback was:
{{traceback}}
{EMAIL_SIGNATURE_SEP}
Just to let you know,
py-celery at {{hostname}}.
""".format(EMAIL_SIGNATURE_SEP=EMAIL_SIGNATURE_SEP)
def __init__(self, task, **kwargs):
self.task = task
self.subject = kwargs.get('subject', self.subject)
self.body = kwargs.get('body', self.body)
def should_send(self, context, exc):
"""Return true or false depending on if a task error mail
should be sent for this type of error."""
return True
def format_subject(self, context):
return self.subject.strip().format(**context)
def format_body(self, context):
return self.body.strip().format(**context)
def send(self, context, exc, fail_silently=True):
if self.should_send(context, exc):
self.task.app.mail_admins(self.format_subject(context),
self.format_body(context),
fail_silently=fail_silently)
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