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497 lines
16 KiB
497 lines
16 KiB
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2019 Chris Caron <lead2gold@gmail.com>
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# All rights reserved.
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#
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# This code is licensed under the MIT License.
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files(the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions :
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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# To use this plugin, you need to first access https://api.slack.com
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# Specifically https://my.slack.com/services/new/incoming-webhook/
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# to create a new incoming webhook for your account. You'll need to
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# follow the wizard to pre-determine the channel(s) you want your
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# message to broadcast to, and when you're complete, you will
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# recieve a URL that looks something like this:
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# https://hooks.slack.com/services/T1JJ3T3L2/A1BRTD4JD/TIiajkdnlazkcOXrIdevi7FQ
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# ^ ^ ^
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# | | |
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# These are important <--------------^---------^---------------^
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#
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#
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import re
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import requests
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from json import dumps
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from time import time
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from .NotifyBase import NotifyBase
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from ..common import NotifyImageSize
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from ..common import NotifyType
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from ..common import NotifyFormat
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from ..utils import parse_bool
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from ..utils import parse_list
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from ..AppriseLocale import gettext_lazy as _
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# Token required as part of the API request
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# /AAAAAAAAA/........./........................
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VALIDATE_TOKEN_A = re.compile(r'[A-Z0-9]{9}')
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# Token required as part of the API request
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# /........./BBBBBBBBB/........................
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VALIDATE_TOKEN_B = re.compile(r'[A-Z0-9]{9}')
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# Token required as part of the API request
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# /........./........./CCCCCCCCCCCCCCCCCCCCCCCC
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VALIDATE_TOKEN_C = re.compile(r'[A-Za-z0-9]{24}')
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# Extend HTTP Error Messages
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SLACK_HTTP_ERROR_MAP = {
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401: 'Unauthorized - Invalid Token.',
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}
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# Used to break path apart into list of channels
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CHANNEL_LIST_DELIM = re.compile(r'[ \t\r\n,#\\/]+')
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# Used to detect a channel
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IS_VALID_TARGET_RE = re.compile(r'[+#@]?([A-Z0-9_]{1,32})', re.I)
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class NotifySlack(NotifyBase):
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"""
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A wrapper for Slack Notifications
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"""
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# The default descriptive name associated with the Notification
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service_name = 'Slack'
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# The services URL
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service_url = 'https://slack.com/'
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# The default secure protocol
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secure_protocol = 'slack'
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# A URL that takes you to the setup/help of the specific protocol
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setup_url = 'https://github.com/caronc/apprise/wiki/Notify_slack'
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# Slack uses the http protocol with JSON requests
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notify_url = 'https://hooks.slack.com/services'
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# Allows the user to specify the NotifyImageSize object
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image_size = NotifyImageSize.XY_72
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# The maximum allowable characters allowed in the body per message
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body_maxlen = 1000
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# Default Notification Format
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notify_format = NotifyFormat.MARKDOWN
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# Define object templates
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templates = (
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'{schema}://{token_a}/{token_b}{token_c}',
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'{schema}://{botname}@{token_a}/{token_b}{token_c}',
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'{schema}://{token_a}/{token_b}{token_c}/{targets}',
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'{schema}://{botname}@{token_a}/{token_b}{token_c}/{targets}',
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)
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# Define our template tokens
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template_tokens = dict(NotifyBase.template_tokens, **{
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'botname': {
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'name': _('Bot Name'),
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'type': 'string',
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'map_to': 'user',
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},
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'token_a': {
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'name': _('Token A'),
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'type': 'string',
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'private': True,
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'required': True,
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'regex': (r'[A-Z0-9]{9}', 'i'),
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},
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'token_b': {
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'name': _('Token B'),
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'type': 'string',
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'private': True,
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'required': True,
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'regex': (r'[A-Z0-9]{9}', 'i'),
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},
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'token_c': {
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'name': _('Token C'),
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'type': 'string',
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'private': True,
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'required': True,
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'regex': (r'[A-Za-z0-9]{24}', 'i'),
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},
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'target_encoded_id': {
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'name': _('Target Encoded ID'),
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'type': 'string',
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'prefix': '+',
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'map_to': 'targets',
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},
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'target_user': {
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'name': _('Target User'),
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'type': 'string',
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'prefix': '@',
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'map_to': 'targets',
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},
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'target_channels': {
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'name': _('Target Channel'),
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'type': 'string',
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'prefix': '#',
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'map_to': 'targets',
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},
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'targets': {
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'name': _('Targets'),
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'type': 'list:string',
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},
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})
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# Define our template arguments
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template_args = dict(NotifyBase.template_args, **{
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'image': {
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'name': _('Include Image'),
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'type': 'bool',
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'default': True,
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'map_to': 'include_image',
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},
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'to': {
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'alias_of': 'targets',
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},
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})
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def __init__(self, token_a, token_b, token_c, targets,
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include_image=True, **kwargs):
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"""
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Initialize Slack Object
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"""
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super(NotifySlack, self).__init__(**kwargs)
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if not token_a:
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msg = 'The first API token is not specified.'
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self.logger.warning(msg)
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raise TypeError(msg)
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if not token_b:
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msg = 'The second API token is not specified.'
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self.logger.warning(msg)
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raise TypeError(msg)
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if not token_c:
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msg = 'The third API token is not specified.'
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self.logger.warning(msg)
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raise TypeError(msg)
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if not VALIDATE_TOKEN_A.match(token_a.strip()):
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msg = 'The first API token specified ({}) is invalid.'\
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.format(token_a)
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self.logger.warning(msg)
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raise TypeError(msg)
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# The token associated with the account
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self.token_a = token_a.strip()
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if not VALIDATE_TOKEN_B.match(token_b.strip()):
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msg = 'The second API token specified ({}) is invalid.'\
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.format(token_b)
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self.logger.warning(msg)
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raise TypeError(msg)
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# The token associated with the account
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self.token_b = token_b.strip()
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if not VALIDATE_TOKEN_C.match(token_c.strip()):
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msg = 'The third API token specified ({}) is invalid.'\
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.format(token_c)
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self.logger.warning(msg)
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raise TypeError(msg)
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# The token associated with the account
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self.token_c = token_c.strip()
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if not self.user:
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self.logger.warning(
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'No user was specified; using "%s".' % self.app_id)
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# Build list of channels
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self.channels = parse_list(targets)
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if len(self.channels) == 0:
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# No problem; the webhook is smart enough to just notify the
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# channel it was created for; adding 'None' is just used as
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# a flag lower to not set the channels
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self.channels.append(None)
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# Formatting requirements are defined here:
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# https://api.slack.com/docs/message-formatting
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self._re_formatting_map = {
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# New lines must become the string version
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r'\r\*\n': '\\n',
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# Escape other special characters
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r'&': '&',
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r'<': '<',
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r'>': '>',
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}
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# Iterate over above list and store content accordingly
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self._re_formatting_rules = re.compile(
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r'(' + '|'.join(self._re_formatting_map.keys()) + r')',
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re.IGNORECASE,
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)
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# Place a thumbnail image inline with the message body
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self.include_image = include_image
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def send(self, body, title='', notify_type=NotifyType.INFO, **kwargs):
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"""
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Perform Slack Notification
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"""
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headers = {
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'User-Agent': self.app_id,
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'Content-Type': 'application/json',
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}
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# error tracking (used for function return)
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has_error = False
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# Perform Formatting
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title = self._re_formatting_rules.sub( # pragma: no branch
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lambda x: self._re_formatting_map[x.group()], title,
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)
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body = self._re_formatting_rules.sub( # pragma: no branch
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lambda x: self._re_formatting_map[x.group()], body,
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)
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url = '%s/%s/%s/%s' % (
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self.notify_url,
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self.token_a,
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self.token_b,
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self.token_c,
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)
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# prepare JSON Object
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payload = {
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'username': self.user if self.user else self.app_id,
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# Use Markdown language
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'mrkdwn': (self.notify_format == NotifyFormat.MARKDOWN),
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'attachments': [{
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'title': title,
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'text': body,
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'color': self.color(notify_type),
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# Time
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'ts': time(),
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'footer': self.app_id,
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}],
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}
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# Create a copy of the channel list
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channels = list(self.channels)
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while len(channels):
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channel = channels.pop(0)
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if channel is not None:
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# Channel over-ride was specified
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if not IS_VALID_TARGET_RE.match(channel):
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self.logger.warning(
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"The specified target {} is invalid;"
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"skipping.".format(channel))
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# Mark our failure
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has_error = True
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continue
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if len(channel) > 1 and channel[0] == '+':
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# Treat as encoded id if prefixed with a +
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payload['channel'] = channel[1:]
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elif len(channel) > 1 and channel[0] == '@':
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# Treat @ value 'as is'
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payload['channel'] = channel
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else:
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# Prefix with channel hash tag
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payload['channel'] = '#%s' % channel
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# Acquire our to-be footer icon if configured to do so
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image_url = None if not self.include_image \
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else self.image_url(notify_type)
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if image_url:
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payload['attachments'][0]['footer_icon'] = image_url
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self.logger.debug('Slack POST URL: %s (cert_verify=%r)' % (
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url, self.verify_certificate,
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))
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self.logger.debug('Slack Payload: %s' % str(payload))
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# Always call throttle before any remote server i/o is made
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self.throttle()
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try:
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r = requests.post(
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url,
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data=dumps(payload),
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headers=headers,
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verify=self.verify_certificate,
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)
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if r.status_code != requests.codes.ok:
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# We had a problem
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status_str = \
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NotifySlack.http_response_code_lookup(
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r.status_code, SLACK_HTTP_ERROR_MAP)
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self.logger.warning(
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'Failed to send Slack notification{}: '
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'{}{}error={}.'.format(
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' to {}'.format(channel)
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if channel is not None else '',
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status_str,
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', ' if status_str else '',
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r.status_code))
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self.logger.debug(
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'Response Details:\r\n{}'.format(r.content))
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# Mark our failure
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has_error = True
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continue
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else:
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self.logger.info(
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'Sent Slack notification{}.'.format(
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' to {}'.format(channel)
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if channel is not None else ''))
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except requests.RequestException as e:
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self.logger.warning(
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'A Connection error occured sending Slack '
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'notification{}.'.format(
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' to {}'.format(channel)
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if channel is not None else ''))
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self.logger.debug('Socket Exception: %s' % str(e))
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# Mark our failure
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has_error = True
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continue
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return not has_error
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def url(self):
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"""
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Returns the URL built dynamically based on specified arguments.
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"""
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# Define any arguments set
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args = {
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'format': self.notify_format,
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'overflow': self.overflow_mode,
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'image': 'yes' if self.include_image else 'no',
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'verify': 'yes' if self.verify_certificate else 'no',
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}
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# Determine if there is a botname present
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botname = ''
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if self.user:
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botname = '{botname}@'.format(
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botname=NotifySlack.quote(self.user, safe=''),
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)
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return '{schema}://{botname}{token_a}/{token_b}/{token_c}/{targets}/'\
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'?{args}'.format(
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schema=self.secure_protocol,
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botname=botname,
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token_a=NotifySlack.quote(self.token_a, safe=''),
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token_b=NotifySlack.quote(self.token_b, safe=''),
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token_c=NotifySlack.quote(self.token_c, safe=''),
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targets='/'.join(
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[NotifySlack.quote(x, safe='') for x in self.channels]),
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args=NotifySlack.urlencode(args),
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)
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@staticmethod
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def parse_url(url):
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"""
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Parses the URL and returns enough arguments that can allow
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us to substantiate this object.
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"""
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results = NotifyBase.parse_url(url)
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if not results:
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# We're done early as we couldn't load the results
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return results
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# Get unquoted entries
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entries = NotifySlack.split_path(results['fullpath'])
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# The first token is stored in the hostname
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results['token_a'] = NotifySlack.unquote(results['host'])
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# Now fetch the remaining tokens
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try:
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results['token_b'] = entries.pop(0)
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except IndexError:
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# We're done
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results['token_b'] = None
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try:
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results['token_c'] = entries.pop(0)
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except IndexError:
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# We're done
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results['token_c'] = None
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# assign remaining entries to the channels we wish to notify
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results['targets'] = entries
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# Support the 'to' variable so that we can support rooms this way too
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# The 'to' makes it easier to use yaml configuration
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if 'to' in results['qsd'] and len(results['qsd']['to']):
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results['targets'] += [x for x in filter(
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bool, CHANNEL_LIST_DELIM.split(
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NotifySlack.unquote(results['qsd']['to'])))]
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# Get Image
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results['include_image'] = \
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parse_bool(results['qsd'].get('image', True))
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return results
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@staticmethod
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def parse_native_url(url):
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"""
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Support https://hooks.slack.com/services/TOKEN_A/TOKEN_B/TOKEN_C
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"""
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result = re.match(
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r'^https?://hooks\.slack\.com/services/'
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r'(?P<token_a>[A-Z0-9]{9})/'
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r'(?P<token_b>[A-Z0-9]{9})/'
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r'(?P<token_c>[A-Z0-9]{24})/?'
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r'(?P<args>\?[.+])?$', url, re.I)
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if result:
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return NotifySlack.parse_url(
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'{schema}://{token_a}/{token_b}/{token_c}/{args}'.format(
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schema=NotifySlack.secure_protocol,
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token_a=result.group('token_a'),
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token_b=result.group('token_b'),
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token_c=result.group('token_c'),
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args='' if not result.group('args')
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else result.group('args')))
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return None
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