You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
699 lines
24 KiB
699 lines
24 KiB
# -*- coding: utf-8 -*-
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# BSD 3-Clause License
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#
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# Apprise - Push Notification Library.
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# Copyright (c) 2023, Chris Caron <lead2gold@gmail.com>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# 3. Neither the name of the copyright holder nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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import re
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import hmac
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import requests
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from hashlib import sha256
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from datetime import datetime
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from collections import OrderedDict
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from xml.etree import ElementTree
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from itertools import chain
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from .NotifyBase import NotifyBase
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from ..URLBase import PrivacyMode
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from ..common import NotifyType
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from ..utils import is_phone_no
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from ..utils import parse_list
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from ..utils import validate_regex
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from ..AppriseLocale import gettext_lazy as _
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# Topic Detection
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# Summary: 256 Characters max, only alpha/numeric plus underscore (_) and
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# dash (-) additionally allowed.
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#
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# Soure: https://docs.aws.amazon.com/AWSSimpleQueueService/latest\
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# /SQSDeveloperGuide/sqs-limits.html#limits-queues
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#
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# Allow a starting hashtag (#) specification to help eliminate possible
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# ambiguity between a topic that is comprised of all digits and a phone number
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IS_TOPIC = re.compile(r'^#?(?P<name>[A-Za-z0-9_-]+)\s*$')
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# Because our AWS Access Key Secret contains slashes, we actually use the
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# region as a delimiter. This is a bit hacky; but it's much easier than having
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# users of this product search though this Access Key Secret and escape all
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# of the forward slashes!
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IS_REGION = re.compile(
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r'^\s*(?P<country>[a-z]{2})-(?P<area>[a-z-]+?)-(?P<no>[0-9]+)\s*$', re.I)
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# Extend HTTP Error Messages
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AWS_HTTP_ERROR_MAP = {
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403: 'Unauthorized - Invalid Access/Secret Key Combination.',
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}
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class NotifySNS(NotifyBase):
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"""
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A wrapper for AWS SNS (Amazon Simple Notification)
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"""
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# The default descriptive name associated with the Notification
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service_name = 'AWS Simple Notification Service (SNS)'
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# The services URL
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service_url = 'https://aws.amazon.com/sns/'
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# The default secure protocol
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secure_protocol = 'sns'
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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_sns'
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# AWS is pretty good for handling data load so request limits
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# can occur in much shorter bursts
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request_rate_per_sec = 2.5
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# The maximum length of the body
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# Source: https://docs.aws.amazon.com/sns/latest/api/API_Publish.html
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body_maxlen = 160
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# A title can not be used for SMS Messages. Setting this to zero will
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# cause any title (if defined) to get placed into the message body.
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title_maxlen = 0
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# Define object templates
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templates = (
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'{schema}://{access_key_id}/{secret_access_key}{region}/{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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'access_key_id': {
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'name': _('Access Key ID'),
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'type': 'string',
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'private': True,
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'required': True,
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},
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'secret_access_key': {
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'name': _('Secret Access Key'),
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'type': 'string',
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'private': True,
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'required': True,
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},
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'region': {
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'name': _('Region'),
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'type': 'string',
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'required': True,
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'regex': (r'^[a-z]{2}-[a-z-]+?-[0-9]+$', 'i'),
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'map_to': 'region_name',
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},
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'target_phone_no': {
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'name': _('Target Phone No'),
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'type': 'string',
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'map_to': 'targets',
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'regex': (r'^[0-9\s)(+-]+$', 'i')
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},
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'target_topic': {
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'name': _('Target Topic'),
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'type': 'string',
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'map_to': 'targets',
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'prefix': '#',
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'regex': (r'^[A-Za-z0-9_-]+$', 'i'),
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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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'to': {
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'alias_of': 'targets',
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},
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'access': {
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'alias_of': 'access_key_id',
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},
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'secret': {
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'alias_of': 'secret_access_key',
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},
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'region': {
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'alias_of': 'region',
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},
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})
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def __init__(self, access_key_id, secret_access_key, region_name,
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targets=None, **kwargs):
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"""
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Initialize Notify AWS SNS Object
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"""
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super().__init__(**kwargs)
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# Store our AWS API Access Key
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self.aws_access_key_id = validate_regex(access_key_id)
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if not self.aws_access_key_id:
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msg = 'An invalid AWS Access Key ID was specified.'
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self.logger.warning(msg)
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raise TypeError(msg)
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# Store our AWS API Secret Access key
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self.aws_secret_access_key = validate_regex(secret_access_key)
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if not self.aws_secret_access_key:
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msg = 'An invalid AWS Secret Access Key ' \
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'({}) was specified.'.format(secret_access_key)
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self.logger.warning(msg)
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raise TypeError(msg)
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# Acquire our AWS Region Name:
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# eg. us-east-1, cn-north-1, us-west-2, ...
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self.aws_region_name = validate_regex(
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region_name, *self.template_tokens['region']['regex'])
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if not self.aws_region_name:
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msg = 'An invalid AWS Region ({}) was specified.'.format(
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region_name)
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self.logger.warning(msg)
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raise TypeError(msg)
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# Initialize topic list
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self.topics = list()
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# Initialize numbers list
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self.phone = list()
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# Set our notify_url based on our region
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self.notify_url = 'https://sns.{}.amazonaws.com/'\
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.format(self.aws_region_name)
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# AWS Service Details
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self.aws_service_name = 'sns'
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self.aws_canonical_uri = '/'
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# AWS Authentication Details
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self.aws_auth_version = 'AWS4'
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self.aws_auth_algorithm = 'AWS4-HMAC-SHA256'
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self.aws_auth_request = 'aws4_request'
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# Validate targets and drop bad ones:
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for target in parse_list(targets):
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result = is_phone_no(target)
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if result:
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# store valid phone number in E.164 format
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self.phone.append('+{}'.format(result['full']))
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continue
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result = IS_TOPIC.match(target)
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if result:
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# store valid topic
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self.topics.append(result.group('name'))
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continue
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self.logger.warning(
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'Dropped invalid phone/topic '
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'(%s) specified.' % target,
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)
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return
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def send(self, body, title='', notify_type=NotifyType.INFO, **kwargs):
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"""
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wrapper to send_notification since we can alert more then one channel
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"""
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if len(self.phone) == 0 and len(self.topics) == 0:
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# We have a bot token and no target(s) to message
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self.logger.warning('No AWS targets to notify.')
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return False
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# Initiaize our error tracking
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error_count = 0
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# Create a copy of our phone #'s to notify against
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phone = list(self.phone)
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topics = list(self.topics)
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while len(phone) > 0:
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# Get Phone No
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no = phone.pop(0)
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# Prepare SNS Message Payload
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payload = {
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'Action': u'Publish',
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'Message': body,
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'Version': u'2010-03-31',
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'PhoneNumber': no,
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}
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(result, _) = self._post(payload=payload, to=no)
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if not result:
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error_count += 1
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# Send all our defined topic id's
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while len(topics):
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# Get Topic
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topic = topics.pop(0)
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# First ensure our topic exists, if it doesn't, it gets created
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payload = {
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'Action': u'CreateTopic',
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'Version': u'2010-03-31',
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'Name': topic,
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}
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(result, response) = self._post(payload=payload, to=topic)
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if not result:
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error_count += 1
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continue
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# Get the Amazon Resource Name
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topic_arn = response.get('topic_arn')
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if not topic_arn:
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# Could not acquire our topic; we're done
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error_count += 1
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continue
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# Build our payload now that we know our topic_arn
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payload = {
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'Action': u'Publish',
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'Version': u'2010-03-31',
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'TopicArn': topic_arn,
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'Message': body,
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}
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# Send our payload to AWS
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(result, _) = self._post(payload=payload, to=topic)
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if not result:
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error_count += 1
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return error_count == 0
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def _post(self, payload, to):
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"""
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Wrapper to request.post() to manage it's response better and make
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the send() function cleaner and easier to maintain.
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This function returns True if the _post was successful and False
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if it wasn't.
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"""
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# Always call throttle before any remote server i/o is made; for AWS
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# time plays a huge factor in the headers being sent with the payload.
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# So for AWS (SNS) requests we must throttle before they're generated
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# and not directly before the i/o call like other notification
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# services do.
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self.throttle()
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# Convert our payload from a dict() into a urlencoded string
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payload = NotifySNS.urlencode(payload)
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# Prepare our Notification URL
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# Prepare our AWS Headers based on our payload
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headers = self.aws_prepare_request(payload)
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self.logger.debug('AWS POST URL: %s (cert_verify=%r)' % (
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self.notify_url, self.verify_certificate,
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))
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self.logger.debug('AWS Payload: %s' % str(payload))
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try:
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r = requests.post(
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self.notify_url,
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data=payload,
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headers=headers,
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verify=self.verify_certificate,
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timeout=self.request_timeout,
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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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NotifySNS.http_response_code_lookup(
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r.status_code, AWS_HTTP_ERROR_MAP)
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self.logger.warning(
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'Failed to send AWS notification to {}: '
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'{}{}error={}.'.format(
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to,
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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('Response Details:\r\n{}'.format(r.content))
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return (False, NotifySNS.aws_response_to_dict(r.text))
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else:
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self.logger.info(
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'Sent AWS notification to "%s".' % (to))
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except requests.RequestException as e:
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self.logger.warning(
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'A Connection error occurred sending AWS '
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'notification to "%s".' % (to),
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)
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self.logger.debug('Socket Exception: %s' % str(e))
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return (False, NotifySNS.aws_response_to_dict(None))
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return (True, NotifySNS.aws_response_to_dict(r.text))
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def aws_prepare_request(self, payload, reference=None):
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"""
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Takes the intended payload and returns the headers for it.
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The payload is presumed to have been already urlencoded()
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"""
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# Define our AWS header
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headers = {
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'User-Agent': self.app_id,
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'Content-Type': 'application/x-www-form-urlencoded; charset=utf-8',
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# Populated below
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'Content-Length': 0,
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'Authorization': None,
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'X-Amz-Date': None,
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}
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# Get a reference time (used for header construction)
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reference = datetime.utcnow()
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# Provide Content-Length
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headers['Content-Length'] = str(len(payload))
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# Amazon Date Format
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amzdate = reference.strftime('%Y%m%dT%H%M%SZ')
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headers['X-Amz-Date'] = amzdate
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# Credential Scope
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scope = '{date}/{region}/{service}/{request}'.format(
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date=reference.strftime('%Y%m%d'),
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region=self.aws_region_name,
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service=self.aws_service_name,
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request=self.aws_auth_request,
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)
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# Similar to headers; but a subset. keys must be lowercase
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signed_headers = OrderedDict([
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('content-type', headers['Content-Type']),
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('host', '{service}.{region}.amazonaws.com'.format(
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service=self.aws_service_name,
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region=self.aws_region_name)),
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('x-amz-date', headers['X-Amz-Date']),
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])
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#
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# Build Canonical Request Object
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#
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canonical_request = '\n'.join([
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# Method
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u'POST',
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# URL
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self.aws_canonical_uri,
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# Query String (none set for POST)
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'',
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# Header Content (must include \n at end!)
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# All entries except characters in amazon date must be
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# lowercase
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'\n'.join(['%s:%s' % (k, v)
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for k, v in signed_headers.items()]) + '\n',
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# Header Entries (in same order identified above)
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';'.join(signed_headers.keys()),
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# Payload
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sha256(payload.encode('utf-8')).hexdigest(),
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])
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# Prepare Unsigned Signature
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to_sign = '\n'.join([
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self.aws_auth_algorithm,
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amzdate,
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scope,
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sha256(canonical_request.encode('utf-8')).hexdigest(),
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])
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# Our Authorization header
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headers['Authorization'] = ', '.join([
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'{algorithm} Credential={key}/{scope}'.format(
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algorithm=self.aws_auth_algorithm,
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key=self.aws_access_key_id,
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scope=scope,
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),
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'SignedHeaders={signed_headers}'.format(
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signed_headers=';'.join(signed_headers.keys()),
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),
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'Signature={signature}'.format(
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signature=self.aws_auth_signature(to_sign, reference)
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),
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])
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return headers
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def aws_auth_signature(self, to_sign, reference):
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"""
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Generates a AWS v4 signature based on provided payload
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which should be in the form of a string.
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"""
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def _sign(key, msg, to_hex=False):
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"""
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Perform AWS Signing
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"""
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if to_hex:
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return hmac.new(key, msg.encode('utf-8'), sha256).hexdigest()
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return hmac.new(key, msg.encode('utf-8'), sha256).digest()
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_date = _sign((
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self.aws_auth_version +
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self.aws_secret_access_key).encode('utf-8'),
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reference.strftime('%Y%m%d'))
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_region = _sign(_date, self.aws_region_name)
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_service = _sign(_region, self.aws_service_name)
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_signed = _sign(_service, self.aws_auth_request)
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return _sign(_signed, to_sign, to_hex=True)
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|
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@staticmethod
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def aws_response_to_dict(aws_response):
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"""
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Takes an AWS Response object as input and returns it as a dictionary
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|
but not befor extracting out what is useful to us first.
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eg:
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IN:
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<CreateTopicResponse
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xmlns="http://sns.amazonaws.com/doc/2010-03-31/">
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<CreateTopicResult>
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<TopicArn>arn:aws:sns:us-east-1:000000000000:abcd</TopicArn>
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</CreateTopicResult>
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<ResponseMetadata>
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<RequestId>604bef0f-369c-50c5-a7a4-bbd474c83d6a</RequestId>
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</ResponseMetadata>
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</CreateTopicResponse>
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OUT:
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{
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type: 'CreateTopicResponse',
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request_id: '604bef0f-369c-50c5-a7a4-bbd474c83d6a',
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topic_arn: 'arn:aws:sns:us-east-1:000000000000:abcd',
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}
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"""
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# Define ourselves a set of directives we want to keep if found and
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# then identify the value we want to map them to in our response
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# object
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aws_keep_map = {
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'RequestId': 'request_id',
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'TopicArn': 'topic_arn',
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'MessageId': 'message_id',
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# Error Message Handling
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'Type': 'error_type',
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'Code': 'error_code',
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'Message': 'error_message',
|
|
}
|
|
|
|
# A default response object that we'll manipulate as we pull more data
|
|
# from our AWS Response object
|
|
response = {
|
|
'type': None,
|
|
'request_id': None,
|
|
}
|
|
|
|
try:
|
|
# we build our tree, but not before first eliminating any
|
|
# reference to namespacing (if present) as it makes parsing
|
|
# the tree so much easier.
|
|
root = ElementTree.fromstring(
|
|
re.sub(' xmlns="[^"]+"', '', aws_response, count=1))
|
|
|
|
# Store our response tag object name
|
|
response['type'] = str(root.tag)
|
|
|
|
def _xml_iter(root, response):
|
|
if len(root) > 0:
|
|
for child in root:
|
|
# use recursion to parse everything
|
|
_xml_iter(child, response)
|
|
|
|
elif root.tag in aws_keep_map.keys():
|
|
response[aws_keep_map[root.tag]] = (root.text).strip()
|
|
|
|
# Recursivly iterate over our AWS Response to extract the
|
|
# fields we're interested in in efforts to populate our response
|
|
# object.
|
|
_xml_iter(root, response)
|
|
|
|
except (ElementTree.ParseError, TypeError):
|
|
# bad data just causes us to generate a bad response
|
|
pass
|
|
|
|
return response
|
|
|
|
def url(self, privacy=False, *args, **kwargs):
|
|
"""
|
|
Returns the URL built dynamically based on specified arguments.
|
|
"""
|
|
|
|
# Our URL parameters
|
|
params = self.url_parameters(privacy=privacy, *args, **kwargs)
|
|
|
|
return '{schema}://{key_id}/{key_secret}/{region}/{targets}/'\
|
|
'?{params}'.format(
|
|
schema=self.secure_protocol,
|
|
key_id=self.pprint(self.aws_access_key_id, privacy, safe=''),
|
|
key_secret=self.pprint(
|
|
self.aws_secret_access_key, privacy,
|
|
mode=PrivacyMode.Secret, safe=''),
|
|
region=NotifySNS.quote(self.aws_region_name, safe=''),
|
|
targets='/'.join(
|
|
[NotifySNS.quote(x) for x in chain(
|
|
# Phone # are already prefixed with a plus symbol
|
|
self.phone,
|
|
# Topics are prefixed with a pound/hashtag symbol
|
|
['#{}'.format(x) for x in self.topics],
|
|
)]),
|
|
params=NotifySNS.urlencode(params),
|
|
)
|
|
|
|
def __len__(self):
|
|
"""
|
|
Returns the number of targets associated with this notification
|
|
"""
|
|
return len(self.phone) + len(self.topics)
|
|
|
|
@staticmethod
|
|
def parse_url(url):
|
|
"""
|
|
Parses the URL and returns enough arguments that can allow
|
|
us to re-instantiate this object.
|
|
|
|
"""
|
|
results = NotifyBase.parse_url(url, verify_host=False)
|
|
if not results:
|
|
# We're done early as we couldn't load the results
|
|
return results
|
|
|
|
# The AWS Access Key ID is stored in the hostname
|
|
access_key_id = NotifySNS.unquote(results['host'])
|
|
|
|
# Our AWS Access Key Secret contains slashes in it which unfortunately
|
|
# means it is of variable length after the hostname. Since we require
|
|
# that the user provides the region code, we intentionally use this
|
|
# as our delimiter to detect where our Secret is.
|
|
secret_access_key = None
|
|
region_name = None
|
|
|
|
# We need to iterate over each entry in the fullpath and find our
|
|
# region. Once we get there we stop and build our secret from our
|
|
# accumulated data.
|
|
secret_access_key_parts = list()
|
|
|
|
# Start with a list of entries to work with
|
|
entries = NotifySNS.split_path(results['fullpath'])
|
|
|
|
# Section 1: Get Region and Access Secret
|
|
index = 0
|
|
for i, entry in enumerate(entries):
|
|
|
|
# Are we at the region yet?
|
|
result = IS_REGION.match(entry)
|
|
if result:
|
|
# We found our Region; Rebuild our access key secret based on
|
|
# all entries we found prior to this:
|
|
secret_access_key = '/'.join(secret_access_key_parts)
|
|
|
|
# Ensure region is nicely formatted
|
|
region_name = "{country}-{area}-{no}".format(
|
|
country=result.group('country').lower(),
|
|
area=result.group('area').lower(),
|
|
no=result.group('no'),
|
|
)
|
|
|
|
# Track our index as we'll use this to grab the remaining
|
|
# content in the next Section
|
|
index = i + 1
|
|
|
|
# We're done with Section 1
|
|
break
|
|
|
|
# Store our secret parts
|
|
secret_access_key_parts.append(entry)
|
|
|
|
# Section 2: Get our Recipients (basically all remaining entries)
|
|
results['targets'] = entries[index:]
|
|
|
|
# Support the 'to' variable so that we can support rooms this way too
|
|
# The 'to' makes it easier to use yaml configuration
|
|
if 'to' in results['qsd'] and len(results['qsd']['to']):
|
|
results['targets'] += \
|
|
NotifySNS.parse_list(results['qsd']['to'])
|
|
|
|
# Handle secret_access_key over-ride
|
|
if 'secret' in results['qsd'] and len(results['qsd']['secret']):
|
|
results['secret_access_key'] = \
|
|
NotifySNS.unquote(results['qsd']['secret'])
|
|
else:
|
|
results['secret_access_key'] = secret_access_key
|
|
|
|
# Handle access key id over-ride
|
|
if 'access' in results['qsd'] and len(results['qsd']['access']):
|
|
results['access_key_id'] = \
|
|
NotifySNS.unquote(results['qsd']['access'])
|
|
else:
|
|
results['access_key_id'] = access_key_id
|
|
|
|
# Handle region name id over-ride
|
|
if 'region' in results['qsd'] and len(results['qsd']['region']):
|
|
results['region_name'] = \
|
|
NotifySNS.unquote(results['qsd']['region'])
|
|
else:
|
|
results['region_name'] = region_name
|
|
|
|
# Return our result set
|
|
return results
|