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bazarr/libs/apprise/plugins/NotifySlack.py
2018-09-16 20:33:04 -04:00

319 lines
10 KiB
Python

# -*- coding: utf-8 -*-
#
# Slack Notify Wrapper
#
# Copyright (C) 2017-2018 Chris Caron <lead2gold@gmail.com>
#
# This file is part of apprise.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
# To use this plugin, you need to first access https://api.slack.com
# Specifically https://my.slack.com/services/new/incoming-webhook/
# to create a new incoming webhook for your account. You'll need to
# follow the wizard to pre-determine the channel(s) you want your
# message to broadcast to, and when you're complete, you will
# recieve a URL that looks something like this:
# https://hooks.slack.com/services/T1JJ3T3L2/A1BRTD4JD/TIiajkdnlazkcOXrIdevi7FQ
# ^ ^ ^
# | | |
# These are important <--------------^---------^---------------^
#
#
import re
import requests
from json import dumps
from time import time
from .NotifyBase import NotifyBase
from .NotifyBase import HTTP_ERROR_MAP
from ..common import NotifyImageSize
from ..utils import compat_is_basestring
# Token required as part of the API request
# /AAAAAAAAA/........./........................
VALIDATE_TOKEN_A = re.compile(r'[A-Z0-9]{9}')
# Token required as part of the API request
# /........./BBBBBBBBB/........................
VALIDATE_TOKEN_B = re.compile(r'[A-Z0-9]{9}')
# Token required as part of the API request
# /........./........./CCCCCCCCCCCCCCCCCCCCCCCC
VALIDATE_TOKEN_C = re.compile(r'[A-Za-z0-9]{24}')
# Default User
SLACK_DEFAULT_USER = 'apprise'
# Extend HTTP Error Messages
SLACK_HTTP_ERROR_MAP = HTTP_ERROR_MAP.copy()
SLACK_HTTP_ERROR_MAP.update({
401: 'Unauthorized - Invalid Token.',
})
# Used to break path apart into list of channels
CHANNEL_LIST_DELIM = re.compile(r'[ \t\r\n,#\\/]+')
# Used to detect a channel
IS_CHANNEL_RE = re.compile(r'[+#@]?([A-Z0-9_]{1,32})', re.I)
class NotifySlack(NotifyBase):
"""
A wrapper for Slack Notifications
"""
# The default secure protocol
secure_protocol = 'slack'
# Slack uses the http protocol with JSON requests
notify_url = 'https://hooks.slack.com/services'
# Allows the user to specify the NotifyImageSize object
image_size = NotifyImageSize.XY_72
# The maximum allowable characters allowed in the body per message
body_maxlen = 1000
def __init__(self, token_a, token_b, token_c, channels, **kwargs):
"""
Initialize Slack Object
"""
super(NotifySlack, self).__init__(**kwargs)
if not VALIDATE_TOKEN_A.match(token_a.strip()):
self.logger.warning(
'The first API Token specified (%s) is invalid.' % token_a,
)
raise TypeError(
'The first API Token specified (%s) is invalid.' % token_a,
)
# The token associated with the account
self.token_a = token_a.strip()
if not VALIDATE_TOKEN_B.match(token_b.strip()):
self.logger.warning(
'The second API Token specified (%s) is invalid.' % token_b,
)
raise TypeError(
'The second API Token specified (%s) is invalid.' % token_b,
)
# The token associated with the account
self.token_b = token_b.strip()
if not VALIDATE_TOKEN_C.match(token_c.strip()):
self.logger.warning(
'The third API Token specified (%s) is invalid.' % token_c,
)
raise TypeError(
'The third API Token specified (%s) is invalid.' % token_c,
)
# The token associated with the account
self.token_c = token_c.strip()
if not self.user:
self.logger.warning(
'No user was specified; using %s.' % SLACK_DEFAULT_USER)
self.user = SLACK_DEFAULT_USER
if compat_is_basestring(channels):
self.channels = [x for x in filter(bool, CHANNEL_LIST_DELIM.split(
channels,
))]
elif isinstance(channels, (set, tuple, list)):
self.channels = channels
else:
self.channels = list()
if len(self.channels) == 0:
self.logger.warning('No channel(s) were specified.')
raise TypeError('No channel(s) were specified.')
# Formatting requirements are defined here:
# https://api.slack.com/docs/message-formatting
self._re_formatting_map = {
# New lines must become the string version
r'\r\*\n': '\\n',
# Escape other special characters
r'&': '&amp;',
r'<': '&lt;',
r'>': '&gt;',
}
# Iterate over above list and store content accordingly
self._re_formatting_rules = re.compile(
r'(' + '|'.join(self._re_formatting_map.keys()) + r')',
re.IGNORECASE,
)
def notify(self, title, body, notify_type, **kwargs):
"""
Perform Slack Notification
"""
headers = {
'User-Agent': self.app_id,
'Content-Type': 'application/json',
}
# error tracking (used for function return)
notify_okay = True
# Perform Formatting
title = self._re_formatting_rules.sub( # pragma: no branch
lambda x: self._re_formatting_map[x.group()], title,
)
body = self._re_formatting_rules.sub( # pragma: no branch
lambda x: self._re_formatting_map[x.group()], body,
)
url = '%s/%s/%s/%s' % (
self.notify_url,
self.token_a,
self.token_b,
self.token_c,
)
image_url = self.image_url(notify_type)
# Create a copy of the channel list
channels = list(self.channels)
while len(channels):
channel = channels.pop(0)
if not IS_CHANNEL_RE.match(channel):
self.logger.warning(
"The specified channel '%s' is invalid; skipping." % (
channel,
)
)
continue
if len(channel) > 1 and channel[0] == '+':
# Treat as encoded id if prefixed with a +
_channel = channel[1:]
elif len(channel) > 1 and channel[0] == '@':
# Treat @ value 'as is'
_channel = channel
else:
# Prefix with channel hash tag
_channel = '#%s' % channel
# prepare JSON Object
payload = {
'channel': _channel,
'username': self.user,
# Use Markdown language
'mrkdwn': True,
'attachments': [{
'title': title,
'text': body,
'color': self.color(notify_type),
# Time
'ts': time(),
'footer': self.app_id,
}],
}
if image_url:
payload['attachments'][0]['footer_icon'] = image_url
self.logger.debug('Slack POST URL: %s (cert_verify=%r)' % (
url, self.verify_certificate,
))
self.logger.debug('Slack Payload: %s' % str(payload))
try:
r = requests.post(
url,
data=dumps(payload),
headers=headers,
verify=self.verify_certificate,
)
if r.status_code != requests.codes.ok:
# We had a problem
try:
self.logger.warning(
'Failed to send Slack:%s '
'notification: %s (error=%s).' % (
channel,
SLACK_HTTP_ERROR_MAP[r.status_code],
r.status_code))
except KeyError:
self.logger.warning(
'Failed to send Slack:%s '
'notification (error=%s).' % (
channel,
r.status_code))
# self.logger.debug('Response Details: %s' % r.raw.read())
# Return; we're done
notify_okay = False
else:
self.logger.info('Sent Slack notification.')
except requests.RequestException as e:
self.logger.warning(
'A Connection error occured sending Slack:%s ' % (
channel) + 'notification.'
)
self.logger.debug('Socket Exception: %s' % str(e))
notify_okay = False
if len(channels):
# Prevent thrashing requests
self.throttle()
return notify_okay
@staticmethod
def parse_url(url):
"""
Parses the URL and returns enough arguments that can allow
us to substantiate this object.
"""
results = NotifyBase.parse_url(url)
if not results:
# We're done early as we couldn't load the results
return results
# Apply our settings now
# The first token is stored in the hostname
token_a = results['host']
# Now fetch the remaining tokens
try:
token_b, token_c = [x for x in filter(
bool, NotifyBase.split_path(results['fullpath']))][0:2]
except (ValueError, AttributeError, IndexError):
# We're done
return None
channels = [x for x in filter(
bool, NotifyBase.split_path(results['fullpath']))][2:]
results['token_a'] = token_a
results['token_b'] = token_b
results['token_c'] = token_c
results['channels'] = channels
return results