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bazarr/libs/apprise/Apprise.py

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# -*- coding: utf-8 -*-
#
# Copyright (C) 2019 Chris Caron <lead2gold@gmail.com>
# All rights reserved.
#
# This code is licensed under the MIT License.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files(the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions :
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
import re
import os
import six
from markdown import markdown
from itertools import chain
from .common import NotifyType
from .common import NotifyFormat
from .common import MATCH_ALL_TAG
from .utils import is_exclusive_match
from .utils import parse_list
from .utils import parse_urls
from .utils import cwe312_url
from .logger import logger
from .AppriseAsset import AppriseAsset
from .AppriseConfig import AppriseConfig
from .AppriseAttachment import AppriseAttachment
from .AppriseLocale import AppriseLocale
from .config.ConfigBase import ConfigBase
from .plugins.NotifyBase import NotifyBase
from . import plugins
from . import __version__
# Python v3+ support code made importable so it can remain backwards
# compatible with Python v2
from . import py3compat
ASYNCIO_SUPPORT = not six.PY2
class Apprise(object):
"""
Our Notification Manager
"""
def __init__(self, servers=None, asset=None, location=None, debug=False):
"""
Loads a set of server urls while applying the Asset() module to each
if specified.
If no asset is provided, then the default asset is used.
Optionally specify a global ContentLocation for a more strict means
of handling Attachments.
"""
# Initialize a server list of URLs
self.servers = list()
# Assigns an central asset object that will be later passed into each
# notification plugin. Assets contain information such as the local
# directory images can be found in. It can also identify remote
# URL paths that contain the images you want to present to the end
# user. If no asset is specified, then the default one is used.
self.asset = \
asset if isinstance(asset, AppriseAsset) else AppriseAsset()
if servers:
self.add(servers)
# Initialize our locale object
self.locale = AppriseLocale()
# Set our debug flag
self.debug = debug
# Store our hosting location for optional strict rule handling
# of Attachments. Setting this to None removes any attachment
# restrictions.
self.location = location
@staticmethod
def instantiate(url, asset=None, tag=None, suppress_exceptions=True):
"""
Returns the instance of a instantiated plugin based on the provided
Server URL. If the url fails to be parsed, then None is returned.
The specified url can be either a string (the URL itself) or a
dictionary containing all of the components needed to istantiate
the notification service. If identifying a dictionary, at the bare
minimum, one must specify the schema.
An example of a url dictionary object might look like:
{
schema: 'mailto',
host: 'google.com',
user: 'myuser',
password: 'mypassword',
}
Alternatively the string is much easier to specify:
mailto://user:mypassword@google.com
The dictionary works well for people who are calling details() to
extract the components they need to build the URL manually.
"""
# Initialize our result set
results = None
# Prepare our Asset Object
asset = asset if isinstance(asset, AppriseAsset) else AppriseAsset()
if isinstance(url, six.string_types):
# Acquire our url tokens
results = plugins.url_to_dict(
url, secure_logging=asset.secure_logging)
if results is None:
# Failed to parse the server URL; detailed logging handled
# inside url_to_dict - nothing to report here.
return None
elif isinstance(url, dict):
# We already have our result set
results = url
if results.get('schema') not in plugins.SCHEMA_MAP:
# schema is a mandatory dictionary item as it is the only way
# we can index into our loaded plugins
logger.error('Dictionary does not include a "schema" entry.')
logger.trace(
'Invalid dictionary unpacked as:{}{}'.format(
os.linesep, os.linesep.join(
['{}="{}"'.format(k, v)
for k, v in results.items()])))
return None
logger.trace(
'Dictionary unpacked as:{}{}'.format(
os.linesep, os.linesep.join(
['{}="{}"'.format(k, v) for k, v in results.items()])))
# Otherwise we handle the invalid input specified
else:
logger.error(
'An invalid URL type (%s) was specified for instantiation',
type(url))
return None
if not plugins.SCHEMA_MAP[results['schema']].enabled:
#
# First Plugin Enable Check (Pre Initialization)
#
# Plugin has been disabled at a global level
logger.error(
'%s:// is disabled on this system.', results['schema'])
return None
# Build a list of tags to associate with the newly added notifications
results['tag'] = set(parse_list(tag))
# Set our Asset Object
results['asset'] = asset
if suppress_exceptions:
try:
# Attempt to create an instance of our plugin using the parsed
# URL information
plugin = plugins.SCHEMA_MAP[results['schema']](**results)
# Create log entry of loaded URL
logger.debug(
'Loaded {} URL: {}'.format(
plugins.SCHEMA_MAP[results['schema']].service_name,
plugin.url(privacy=asset.secure_logging)))
except Exception:
# CWE-312 (Secure Logging) Handling
loggable_url = url if not asset.secure_logging \
else cwe312_url(url)
# the arguments are invalid or can not be used.
logger.error(
'Could not load {} URL: {}'.format(
plugins.SCHEMA_MAP[results['schema']].service_name,
loggable_url))
return None
else:
# Attempt to create an instance of our plugin using the parsed
# URL information but don't wrap it in a try catch
plugin = plugins.SCHEMA_MAP[results['schema']](**results)
if not plugin.enabled:
#
# Second Plugin Enable Check (Post Initialization)
#
# Service/Plugin is disabled (on a more local level). This is a
# case where the plugin was initially enabled but then after the
# __init__() was called under the hood something pre-determined
# that it could no longer be used.
# The only downside to doing it this way is services are
# initialized prior to returning the details() if 3rd party tools
# are polling what is available. These services that become
# disabled thereafter are shown initially that they can be used.
logger.error(
'%s:// has become disabled on this system.', results['schema'])
return None
return plugin
def add(self, servers, asset=None, tag=None):
"""
Adds one or more server URLs into our list.
You can override the global asset if you wish by including it with the
server(s) that you add.
The tag allows you to associate 1 or more tag values to the server(s)
being added. tagging a service allows you to exclusively access them
when calling the notify() function.
"""
# Initialize our return status
return_status = True
if asset is None:
# prepare default asset
asset = self.asset
if isinstance(servers, six.string_types):
# build our server list
servers = parse_urls(servers)
if len(servers) == 0:
return False
elif isinstance(servers, dict):
# no problem, we support kwargs, convert it to a list
servers = [servers]
elif isinstance(servers, (ConfigBase, NotifyBase, AppriseConfig)):
# Go ahead and just add our plugin into our list
self.servers.append(servers)
return True
elif not isinstance(servers, (tuple, set, list)):
logger.error(
"An invalid notification (type={}) was specified.".format(
type(servers)))
return False
for _server in servers:
if isinstance(_server, (ConfigBase, NotifyBase, AppriseConfig)):
# Go ahead and just add our plugin into our list
self.servers.append(_server)
continue
elif not isinstance(_server, (six.string_types, dict)):
logger.error(
"An invalid notification (type={}) was specified.".format(
type(_server)))
return_status = False
continue
# Instantiate ourselves an object, this function throws or
# returns None if it fails
instance = Apprise.instantiate(_server, asset=asset, tag=tag)
if not isinstance(instance, NotifyBase):
# No logging is required as instantiate() handles failure
# and/or success reasons for us
return_status = False
continue
# Add our initialized plugin to our server listings
self.servers.append(instance)
# Return our status
return return_status
def clear(self):
"""
Empties our server list
"""
self.servers[:] = []
def find(self, tag=MATCH_ALL_TAG):
"""
Returns an list of all servers matching against the tag specified.
"""
# Build our tag setup
# - top level entries are treated as an 'or'
# - second level (or more) entries are treated as 'and'
#
# examples:
# tag="tagA, tagB" = tagA or tagB
# tag=['tagA', 'tagB'] = tagA or tagB
# tag=[('tagA', 'tagC'), 'tagB'] = (tagA and tagC) or tagB
# tag=[('tagB', 'tagC')] = tagB and tagC
# Iterate over our loaded plugins
for entry in self.servers:
if isinstance(entry, (ConfigBase, AppriseConfig)):
# load our servers
servers = entry.servers()
else:
servers = [entry, ]
for server in servers:
# Apply our tag matching based on our defined logic
if is_exclusive_match(
logic=tag, data=server.tags, match_all=MATCH_ALL_TAG):
yield server
return
def notify(self, body, title='', notify_type=NotifyType.INFO,
body_format=None, tag=MATCH_ALL_TAG, attach=None,
interpret_escapes=None):
"""
Send a notification to all of the plugins previously loaded.
If the body_format specified is NotifyFormat.MARKDOWN, it will
be converted to HTML if the Notification type expects this.
if the tag is specified (either a string or a set/list/tuple
of strings), then only the notifications flagged with that
tagged value are notified. By default all added services
are notified (tag=MATCH_ALL_TAG)
This function returns True if all notifications were successfully
sent, False if even just one of them fails, and None if no
notifications were sent at all as a result of tag filtering and/or
simply having empty configuration files that were read.
Attach can contain a list of attachment URLs. attach can also be
represented by a an AttachBase() (or list of) object(s). This
identifies the products you wish to notify
Set interpret_escapes to True if you want to pre-escape a string
such as turning a \n into an actual new line, etc.
"""
if ASYNCIO_SUPPORT:
return py3compat.asyncio.tosync(
self.async_notify(
body, title,
notify_type=notify_type, body_format=body_format,
tag=tag, attach=attach,
interpret_escapes=interpret_escapes,
),
debug=self.debug
)
else:
try:
results = list(
self._notifyall(
Apprise._notifyhandler,
body, title,
notify_type=notify_type, body_format=body_format,
tag=tag, attach=attach,
interpret_escapes=interpret_escapes,
)
)
except TypeError:
# No notifications sent, and there was an internal error.
return False
else:
if len(results) > 0:
# All notifications sent, return False if any failed.
return all(results)
else:
# No notifications sent.
return None
def async_notify(self, *args, **kwargs):
"""
Send a notification to all of the plugins previously loaded, for
asynchronous callers. This method is an async method that should be
awaited on, even if it is missing the async keyword in its signature.
(This is omitted to preserve syntax compatibility with Python 2.)
The arguments are identical to those of Apprise.notify(). This method
is not available in Python 2.
"""
try:
coroutines = list(
self._notifyall(
Apprise._notifyhandlerasync, *args, **kwargs))
except TypeError:
# No notifications sent, and there was an internal error.
return py3compat.asyncio.toasyncwrap(False)
else:
if len(coroutines) > 0:
# All notifications sent, return False if any failed.
return py3compat.asyncio.notify(coroutines)
else:
# No notifications sent.
return py3compat.asyncio.toasyncwrap(None)
@staticmethod
def _notifyhandler(server, **kwargs):
"""
The synchronous notification sender. Returns True if the notification
sent successfully.
"""
try:
# Send notification
return server.notify(**kwargs)
except TypeError:
# These our our internally thrown notifications
return False
except Exception:
# A catch all so we don't have to abort early
# just because one of our plugins has a bug in it.
logger.exception("Unhandled Notification Exception")
return False
@staticmethod
def _notifyhandlerasync(server, **kwargs):
"""
The asynchronous notification sender. Returns a coroutine that yields
True if the notification sent successfully.
"""
if server.asset.async_mode:
return server.async_notify(**kwargs)
else:
# Send the notification immediately, and wrap the result in a
# coroutine.
status = Apprise._notifyhandler(server, **kwargs)
return py3compat.asyncio.toasyncwrap(status)
def _notifyall(self, handler, body, title='', notify_type=NotifyType.INFO,
body_format=None, tag=MATCH_ALL_TAG, attach=None,
interpret_escapes=None):
"""
Creates notifications for all of the plugins loaded.
Returns a generator that calls handler for each notification. The first
and only argument supplied to handler is the server, and the keyword
arguments are exactly as they would be passed to server.notify().
"""
if len(self) == 0:
# Nothing to notify
raise TypeError("No service(s) to notify")
if not (title or body):
raise TypeError("No message content specified to deliver")
if six.PY2:
# Python 2.7.x Unicode Character Handling
# Ensure we're working with utf-8
if isinstance(title, unicode): # noqa: F821
title = title.encode('utf-8')
if isinstance(body, unicode): # noqa: F821
body = body.encode('utf-8')
# Tracks conversions
conversion_map = dict()
# Prepare attachments if required
if attach is not None and not isinstance(attach, AppriseAttachment):
attach = AppriseAttachment(
attach, asset=self.asset, location=self.location)
# Allow Asset default value
body_format = self.asset.body_format \
if body_format is None else body_format
# Allow Asset default value
interpret_escapes = self.asset.interpret_escapes \
if interpret_escapes is None else interpret_escapes
# Iterate over our loaded plugins
for server in self.find(tag):
# If our code reaches here, we either did not define a tag (it
# was set to None), or we did define a tag and the logic above
# determined we need to notify the service it's associated with
if server.notify_format not in conversion_map:
if body_format == NotifyFormat.MARKDOWN and \
server.notify_format == NotifyFormat.HTML:
# Apply Markdown
conversion_map[server.notify_format] = markdown(body)
elif body_format == NotifyFormat.TEXT and \
server.notify_format == NotifyFormat.HTML:
# Basic TEXT to HTML format map; supports keys only
re_map = {
# Support Ampersand
r'&': '&amp;',
# Spaces to &nbsp; for formatting purposes since
# multiple spaces are treated as one an this may
# not be the callers intention
r' ': '&nbsp;',
# Tab support
r'\t': '&nbsp;&nbsp;&nbsp;',
# Greater than and Less than Characters
r'>': '&gt;',
r'<': '&lt;',
}
# Compile our map
re_table = re.compile(
r'(' + '|'.join(
map(re.escape, re_map.keys())) + r')',
re.IGNORECASE,
)
# Execute our map against our body in addition to
# swapping out new lines and replacing them with <br/>
conversion_map[server.notify_format] = \
re.sub(r'\r*\n', '<br/>\r\n',
re_table.sub(
lambda x: re_map[x.group()], body))
else:
# Store entry directly
conversion_map[server.notify_format] = body
if interpret_escapes:
#
# Escape our content
#
try:
# Added overhead required due to Python 3 Encoding Bug
# identified here: https://bugs.python.org/issue21331
conversion_map[server.notify_format] = \
conversion_map[server.notify_format]\
.encode('ascii', 'backslashreplace')\
.decode('unicode-escape')
except UnicodeDecodeError: # pragma: no cover
# This occurs using a very old verion of Python 2.7 such
# as the one that ships with CentOS/RedHat 7.x (v2.7.5).
conversion_map[server.notify_format] = \
conversion_map[server.notify_format] \
.decode('string_escape')
except AttributeError:
# Must be of string type
logger.error('Failed to escape message body')
raise TypeError
if title:
try:
# Added overhead required due to Python 3 Encoding Bug
# identified here: https://bugs.python.org/issue21331
title = title\
.encode('ascii', 'backslashreplace')\
.decode('unicode-escape')
except UnicodeDecodeError: # pragma: no cover
# This occurs using a very old verion of Python 2.7
# such as the one that ships with CentOS/RedHat 7.x
# (v2.7.5).
title = title.decode('string_escape')
except AttributeError:
# Must be of string type
logger.error('Failed to escape message title')
raise TypeError
yield handler(
server,
body=conversion_map[server.notify_format],
title=title,
notify_type=notify_type,
attach=attach
)
def details(self, lang=None, show_requirements=False, show_disabled=False):
"""
Returns the details associated with the Apprise object
"""
# general object returned
response = {
# Defines the current version of Apprise
'version': __version__,
# Lists all of the currently supported Notifications
'schemas': [],
# Includes the configured asset details
'asset': self.asset.details(),
}
for plugin in set(plugins.SCHEMA_MAP.values()):
# Iterate over our hashed plugins and dynamically build details on
# their status:
content = {
'service_name': getattr(plugin, 'service_name', None),
'service_url': getattr(plugin, 'service_url', None),
'setup_url': getattr(plugin, 'setup_url', None),
# Placeholder - populated below
'details': None
}
# Standard protocol(s) should be None or a tuple
enabled = getattr(plugin, 'enabled', True)
if not show_disabled and not enabled:
# Do not show inactive plugins
continue
elif show_disabled:
# Add current state to response
content['enabled'] = enabled
# Standard protocol(s) should be None or a tuple
protocols = getattr(plugin, 'protocol', None)
if isinstance(protocols, six.string_types):
protocols = (protocols, )
# Secure protocol(s) should be None or a tuple
secure_protocols = getattr(plugin, 'secure_protocol', None)
if isinstance(secure_protocols, six.string_types):
secure_protocols = (secure_protocols, )
# Add our protocol details to our content
content.update({
'protocols': protocols,
'secure_protocols': secure_protocols,
})
if not lang:
# Simply return our results
content['details'] = plugins.details(plugin)
if show_requirements:
content['requirements'] = plugins.requirements(plugin)
else:
# Emulate the specified language when returning our results
with self.locale.lang_at(lang):
content['details'] = plugins.details(plugin)
if show_requirements:
content['requirements'] = plugins.requirements(plugin)
# Build our response object
response['schemas'].append(content)
return response
def urls(self, privacy=False):
"""
Returns all of the loaded URLs defined in this apprise object.
"""
return [x.url(privacy=privacy) for x in self.servers]
def pop(self, index):
"""
Removes an indexed Notification Service from the stack and returns it.
The thing is we can never pop AppriseConfig() entries, only what was
loaded within them. So pop needs to carefully iterate over our list
and only track actual entries.
"""
# Tracking variables
prev_offset = -1
offset = prev_offset
for idx, s in enumerate(self.servers):
if isinstance(s, (ConfigBase, AppriseConfig)):
servers = s.servers()
if len(servers) > 0:
# Acquire a new maximum offset to work with
offset = prev_offset + len(servers)
if offset >= index:
# we can pop an element from our config stack
fn = s.pop if isinstance(s, ConfigBase) \
else s.server_pop
return fn(index if prev_offset == -1
else (index - prev_offset - 1))
else:
offset = prev_offset + 1
if offset == index:
return self.servers.pop(idx)
# Update our old offset
prev_offset = offset
# If we reach here, then we indexed out of range
raise IndexError('list index out of range')
def __getitem__(self, index):
"""
Returns the indexed server entry of a loaded notification server
"""
# Tracking variables
prev_offset = -1
offset = prev_offset
for idx, s in enumerate(self.servers):
if isinstance(s, (ConfigBase, AppriseConfig)):
# Get our list of servers associate with our config object
servers = s.servers()
if len(servers) > 0:
# Acquire a new maximum offset to work with
offset = prev_offset + len(servers)
if offset >= index:
return servers[index if prev_offset == -1
else (index - prev_offset - 1)]
else:
offset = prev_offset + 1
if offset == index:
return self.servers[idx]
# Update our old offset
prev_offset = offset
# If we reach here, then we indexed out of range
raise IndexError('list index out of range')
def __bool__(self):
"""
Allows the Apprise object to be wrapped in an Python 3.x based 'if
statement'. True is returned if at least one service has been loaded.
"""
return len(self) > 0
def __nonzero__(self):
"""
Allows the Apprise object to be wrapped in an Python 2.x based 'if
statement'. True is returned if at least one service has been loaded.
"""
return len(self) > 0
def __iter__(self):
"""
Returns an iterator to each of our servers loaded. This includes those
found inside configuration.
"""
return chain(*[[s] if not isinstance(s, (ConfigBase, AppriseConfig))
else iter(s.servers()) for s in self.servers])
def __len__(self):
"""
Returns the number of servers loaded; this includes those found within
loaded configuration. This funtion nnever actually counts the
Config entry themselves (if they exist), only what they contain.
"""
return sum([1 if not isinstance(s, (ConfigBase, AppriseConfig))
else len(s.servers()) for s in self.servers])
if six.PY2:
del Apprise.async_notify
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