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# -*- coding: utf-8 -*-
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# BSD 2-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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# 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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# You will need an API Key for this plugin to work.
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# From the Settings -> API Keys you can click "Create API Key" if you don't
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# have one already. The key must have at least the "Mail Send" permission
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# to work.
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#
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# The schema to use the plugin looks like this:
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# {schema}://{apikey}:{from_email}
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#
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# Your {from_email} must be comprissed of your Sendgrid Authenticated
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# Domain. The same domain must have 'Link Branding' turned on as well or it
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# will not work. This can be seen from Settings -> Sender Authentication.
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# If you're (SendGrid) verified domain is example.com, then your schema may
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# look something like this:
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# Simple API Reference:
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# - https://sendgrid.com/docs/API_Reference/Web_API_v3/index.html
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# - https://sendgrid.com/docs/ui/sending-email/\
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# how-to-send-an-email-with-dynamic-transactional-templates/
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import requests
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from json import dumps
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from .NotifyBase import NotifyBase
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from ..common import NotifyFormat
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from ..common import NotifyType
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from ..utils import parse_list
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from ..utils import is_email
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from ..utils import validate_regex
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from ..AppriseLocale import gettext_lazy as _
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# Extend HTTP Error Messages
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SENDGRID_HTTP_ERROR_MAP = {
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401: 'Unauthorized - You do not have authorization to make the request.',
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413: 'Payload To Large - The JSON payload you have included in your '
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'request is too large.',
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429: 'Too Many Requests - The number of requests you have made exceeds '
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'SendGrid’s rate limitations.',
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}
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class NotifySendGrid(NotifyBase):
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"""
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A wrapper for Notify SendGrid Notifications
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"""
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# The default descriptive name associated with the Notification
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service_name = 'SendGrid'
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# The services URL
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service_url = 'https://sendgrid.com'
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# The default secure protocol
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secure_protocol = 'sendgrid'
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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_sendgrid'
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# Default to markdown
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notify_format = NotifyFormat.HTML
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# The default Email API URL to use
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notify_url = 'https://api.sendgrid.com/v3/mail/send'
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# Allow 300 requests per minute.
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# 60/300 = 0.2
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request_rate_per_sec = 0.2
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# The default subject to use if one isn't specified.
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default_empty_subject = '<no subject>'
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# Define object templates
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templates = (
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'{schema}://{apikey}:{from_email}',
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'{schema}://{apikey}:{from_email}/{targets}',
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)
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# Define our template arguments
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template_tokens = dict(NotifyBase.template_tokens, **{
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'apikey': {
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'name': _('API Key'),
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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._-]+$', 'i'),
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},
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'from_email': {
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'name': _('Source Email'),
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'type': 'string',
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'required': True,
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},
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'target_email': {
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'name': _('Target Email'),
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'type': 'string',
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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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'to': {
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'alias_of': 'targets',
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},
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'cc': {
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'name': _('Carbon Copy'),
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'type': 'list:string',
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},
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'bcc': {
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'name': _('Blind Carbon Copy'),
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'type': 'list:string',
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},
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'template': {
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# Template ID
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# The template ID is 64 characters with one dash (d-uuid)
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'name': _('Template'),
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'type': 'string',
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},
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})
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# Support Template Dynamic Variables (Substitutions)
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template_kwargs = {
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'template_data': {
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'name': _('Template Data'),
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'prefix': '+',
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},
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}
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def __init__(self, apikey, from_email, targets=None, cc=None,
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bcc=None, template=None, template_data=None, **kwargs):
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"""
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Initialize Notify SendGrid Object
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"""
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super().__init__(**kwargs)
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# API Key (associated with project)
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self.apikey = validate_regex(
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apikey, *self.template_tokens['apikey']['regex'])
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if not self.apikey:
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msg = 'An invalid SendGrid API Key ' \
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'({}) was specified.'.format(apikey)
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self.logger.warning(msg)
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raise TypeError(msg)
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result = is_email(from_email)
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if not result:
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msg = 'Invalid ~From~ email specified: {}'.format(from_email)
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self.logger.warning(msg)
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raise TypeError(msg)
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# Store email address
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self.from_email = result['full_email']
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# Acquire Targets (To Emails)
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self.targets = list()
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# Acquire Carbon Copies
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self.cc = set()
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# Acquire Blind Carbon Copies
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self.bcc = set()
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# Now our dynamic template (if defined)
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self.template = template
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# Now our dynamic template data (if defined)
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self.template_data = template_data \
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if isinstance(template_data, dict) else {}
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# Validate recipients (to:) and drop bad ones:
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for recipient in parse_list(targets):
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result = is_email(recipient)
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if result:
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self.targets.append(result['full_email'])
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continue
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self.logger.warning(
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'Dropped invalid email '
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'({}) specified.'.format(recipient),
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)
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# Validate recipients (cc:) and drop bad ones:
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for recipient in parse_list(cc):
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result = is_email(recipient)
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if result:
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self.cc.add(result['full_email'])
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continue
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self.logger.warning(
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'Dropped invalid Carbon Copy email '
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'({}) specified.'.format(recipient),
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)
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# Validate recipients (bcc:) and drop bad ones:
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for recipient in parse_list(bcc):
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result = is_email(recipient)
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if result:
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self.bcc.add(result['full_email'])
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continue
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self.logger.warning(
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'Dropped invalid Blind Carbon Copy email '
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'({}) specified.'.format(recipient),
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)
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if len(self.targets) == 0:
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# Notify ourselves
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self.targets.append(self.from_email)
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return
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def url(self, privacy=False, *args, **kwargs):
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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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# Our URL parameters
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params = self.url_parameters(privacy=privacy, *args, **kwargs)
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if len(self.cc) > 0:
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# Handle our Carbon Copy Addresses
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params['cc'] = ','.join(self.cc)
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if len(self.bcc) > 0:
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# Handle our Blind Carbon Copy Addresses
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params['bcc'] = ','.join(self.bcc)
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if self.template:
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# Handle our Template ID if if was specified
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params['template'] = self.template
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# Append our template_data into our parameter list
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params.update(
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{'+{}'.format(k): v for k, v in self.template_data.items()})
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# a simple boolean check as to whether we display our target emails
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# or not
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has_targets = \
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not (len(self.targets) == 1 and self.targets[0] == self.from_email)
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return '{schema}://{apikey}:{from_email}/{targets}?{params}'.format(
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schema=self.secure_protocol,
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apikey=self.pprint(self.apikey, privacy, safe=''),
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# never encode email since it plays a huge role in our hostname
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from_email=self.from_email,
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targets='' if not has_targets else '/'.join(
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[NotifySendGrid.quote(x, safe='') for x in self.targets]),
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params=NotifySendGrid.urlencode(params),
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)
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def __len__(self):
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"""
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Returns the number of targets associated with this notification
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"""
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return len(self.targets)
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def send(self, body, title='', notify_type=NotifyType.INFO, **kwargs):
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"""
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Perform SendGrid 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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'Authorization': 'Bearer {}'.format(self.apikey),
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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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# A Simple Email Payload Template
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_payload = {
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'personalizations': [{
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# Placeholder
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'to': [{'email': None}],
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}],
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'from': {
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'email': self.from_email,
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},
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# A subject is a requirement, so if none is specified we must
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# set a default with at least 1 character or SendGrid will deny
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# our request
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'subject': title if title else self.default_empty_subject,
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'content': [{
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'type': 'text/plain'
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if self.notify_format == NotifyFormat.TEXT else 'text/html',
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'value': body,
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}],
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}
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if self.template:
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_payload['template_id'] = self.template
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if self.template_data:
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_payload['personalizations'][0]['dynamic_template_data'] = \
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{k: v for k, v in self.template_data.items()}
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targets = list(self.targets)
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while len(targets) > 0:
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target = targets.pop(0)
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# Create a copy of our template
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payload = _payload.copy()
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# the cc, bcc, to field must be unique or SendMail will fail, the
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# below code prepares this by ensuring the target isn't in the cc
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# list or bcc list. It also makes sure the cc list does not contain
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# any of the bcc entries
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cc = (self.cc - self.bcc - set([target]))
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bcc = (self.bcc - set([target]))
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# Set our target
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payload['personalizations'][0]['to'][0]['email'] = target
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if len(cc):
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payload['personalizations'][0]['cc'] = \
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[{'email': email} for email in cc]
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if len(bcc):
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payload['personalizations'][0]['bcc'] = \
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[{'email': email} for email in bcc]
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self.logger.debug('SendGrid 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('SendGrid 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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self.notify_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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timeout=self.request_timeout,
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)
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if r.status_code not in (
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requests.codes.ok, requests.codes.accepted):
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# We had a problem
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status_str = \
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NotifySendGrid.http_response_code_lookup(
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r.status_code, SENDGRID_HTTP_ERROR_MAP)
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self.logger.warning(
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'Failed to send SendGrid notification to {}: '
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'{}{}error={}.'.format(
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target,
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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 SendGrid notification to {}.'.format(target))
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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 SendGrid '
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'notification to {}.'.format(target))
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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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@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 re-instantiate 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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# Our URL looks like this:
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# {schema}://{apikey}:{from_email}/{targets}
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#
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# which actually equates to:
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# {schema}://{user}:{password}@{host}/{email1}/{email2}/etc..
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# ^ ^ ^
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# | | |
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# apikey -from addr-
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if not results.get('user'):
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# An API Key as not properly specified
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return None
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if not results.get('password'):
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# A From Email was not correctly specified
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return None
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# Prepare our API Key
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results['apikey'] = NotifySendGrid.unquote(results['user'])
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# Prepare our From Email Address
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results['from_email'] = '{}@{}'.format(
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NotifySendGrid.unquote(results['password']),
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NotifySendGrid.unquote(results['host']),
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)
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# Acquire our targets
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results['targets'] = NotifySendGrid.split_path(results['fullpath'])
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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'] += \
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NotifySendGrid.parse_list(results['qsd']['to'])
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# Handle Carbon Copy Addresses
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if 'cc' in results['qsd'] and len(results['qsd']['cc']):
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results['cc'] = \
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NotifySendGrid.parse_list(results['qsd']['cc'])
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# Handle Blind Carbon Copy Addresses
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if 'bcc' in results['qsd'] and len(results['qsd']['bcc']):
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results['bcc'] = \
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NotifySendGrid.parse_list(results['qsd']['bcc'])
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# Handle Blind Carbon Copy Addresses
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if 'template' in results['qsd'] and len(results['qsd']['template']):
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results['template'] = \
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NotifySendGrid.unquote(results['qsd']['template'])
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# Add any template substitutions
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results['template_data'] = results['qsd+']
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return results
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