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757 lines
27 KiB
757 lines
27 KiB
# -*- 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) 2024, 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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import os
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import re
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import sys
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import time
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import hashlib
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import inspect
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import threading
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from .utils import import_module
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from .utils import Singleton
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from .utils import parse_list
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from os.path import dirname
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from os.path import abspath
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from os.path import join
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from .logger import logger
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class PluginManager(metaclass=Singleton):
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"""
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Designed to be a singleton object to maintain all initialized loading
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of modules in memory.
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"""
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# Description (used for logging)
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name = 'Singleton Plugin'
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# Memory Space
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_id = 'undefined'
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# Our Module Python path name
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module_name_prefix = f'apprise.{_id}'
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# The module path to scan
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module_path = join(abspath(dirname(__file__)), _id)
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# For filtering our result when scanning a module
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module_filter_re = re.compile(r'^(?P<name>((?!_)[A-Za-z0-9]+))$')
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# thread safe loading
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_lock = threading.Lock()
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def __init__(self, *args, **kwargs):
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"""
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Over-ride our class instantiation to provide a singleton
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"""
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self._module_map = None
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self._schema_map = None
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# This contains a mapping of all plugins dynamicaly loaded at runtime
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# from external modules such as the @notify decorator
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#
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# The elements here will be additionally added to the _schema_map if
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# there is no conflict otherwise.
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# The structure looks like the following:
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# Module path, e.g. /usr/share/apprise/plugins/my_notify_hook.py
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# {
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# 'path': path,
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#
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# 'notify': {
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# 'schema': {
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# 'name': 'Custom schema name',
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# 'fn_name': 'name_of_function_decorator_was_found_on',
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# 'url': 'schema://any/additional/info/found/on/url'
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# 'plugin': <CustomNotifyWrapperPlugin>
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# },
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# 'schema2': {
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# 'name': 'Custom schema name',
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# 'fn_name': 'name_of_function_decorator_was_found_on',
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# 'url': 'schema://any/additional/info/found/on/url'
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# 'plugin': <CustomNotifyWrapperPlugin>
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# }
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# }
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# Note: that the <CustomNotifyWrapperPlugin> inherits from
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# NotifyBase
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self._custom_module_map = {}
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# Track manually disabled modules (by their schema)
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self._disabled = set()
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# Hash of all paths previously scanned so we don't waste
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# effort/overhead doing it again
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self._paths_previously_scanned = set()
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# Track loaded module paths to prevent from loading them again
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self._loaded = set()
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def unload_modules(self, disable_native=False):
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"""
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Reset our object and unload all modules
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"""
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with self._lock:
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if self._custom_module_map:
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# Handle Custom Module Assignments
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for meta in self._custom_module_map.values():
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if meta['name'] not in self._module_map:
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# Nothing to remove
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continue
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# For the purpose of tidying up un-used modules in memory
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loaded = [m for m in sys.modules.keys()
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if m.startswith(
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self._module_map[meta['name']]['path'])]
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for module_path in loaded:
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del sys.modules[module_path]
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# Reset disabled plugins (if any)
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for schema in self._disabled:
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self._schema_map[schema].enabled = True
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self._disabled.clear()
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# Reset our variables
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self._schema_map = {}
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self._custom_module_map = {}
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if disable_native:
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self._module_map = {}
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else:
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self._module_map = None
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self._loaded = set()
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# Reset our path cache
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self._paths_previously_scanned = set()
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def load_modules(self, path=None, name=None, force=False):
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"""
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Load our modules into memory
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"""
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# Default value
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module_name_prefix = self.module_name_prefix if name is None else name
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module_path = self.module_path if path is None else path
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with self._lock:
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if not force and module_path in self._loaded:
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# We're done
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return
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# Our base reference
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module_count = len(self._module_map) if self._module_map else 0
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schema_count = len(self._schema_map) if self._schema_map else 0
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if not self:
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# Initialize our maps
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self._module_map = {}
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self._schema_map = {}
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self._custom_module_map = {}
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# Used for the detection of additional Notify Services objects
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# The .py extension is optional as we support loading directories
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# too
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module_re = re.compile(
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r'^(?P<name>(?!base|_)[a-z0-9_]+)(\.py)?$',
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re.I)
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t_start = time.time()
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for f in os.listdir(module_path):
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tl_start = time.time()
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match = module_re.match(f)
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if not match:
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# keep going
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continue
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# Store our notification/plugin name:
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module_name = match.group('name')
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module_pyname = '{}.{}'.format(module_name_prefix, module_name)
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if module_name in self._module_map:
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logger.warning(
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"%s(s) (%s) already loaded; ignoring %s",
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self.name, module_name, os.path.join(module_path, f))
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continue
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try:
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module = __import__(
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module_pyname,
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globals(), locals(),
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fromlist=[module_name])
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except ImportError:
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# No problem, we can try again another way...
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module = import_module(
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os.path.join(module_path, f), module_pyname)
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if not module:
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# logging found in import_module and not needed here
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continue
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module_class = None
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for m_class in [obj for obj in dir(module)
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if self.module_filter_re.match(obj)]:
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# Get our plugin
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plugin = getattr(module, m_class)
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if not hasattr(plugin, 'app_id'):
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# Filter out non-notification modules
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logger.trace(
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"(%s) import failed; no app_id defined in %s",
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self.name, m_class, os.path.join(module_path, f))
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continue
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# Add our plugin name to our module map
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self._module_map[module_name] = {
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'plugin': set([plugin]),
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'module': module,
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'path': '{}.{}'.format(
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module_name_prefix, module_name),
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'native': True,
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}
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fn = getattr(plugin, 'schemas', None)
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schemas = set([]) if not callable(fn) else fn(plugin)
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# map our schema to our plugin
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for schema in schemas:
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if schema in self._schema_map:
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logger.error(
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"{} schema ({}) mismatch detected - {} to {}"
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.format(self.name, schema, self._schema_map,
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plugin))
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continue
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# Assign plugin
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self._schema_map[schema] = plugin
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# Store our class
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module_class = m_class
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break
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if not module_class:
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# Not a library we can load as it doesn't follow the simple
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# rule that the class must bear the same name as the
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# notification file itself.
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logger.trace(
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"%s (%s) import failed; no filename/Class "
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"match found in %s",
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self.name, module_name, os.path.join(module_path, f))
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continue
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logger.trace(
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'{} {} loaded in {:.6f}s'.format(
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self.name, module_name, (time.time() - tl_start)))
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# Track the directory loaded so we never load it again
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self._loaded.add(module_path)
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logger.debug(
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'{} {}(s) and {} Schema(s) loaded in {:.4f}s'
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.format(
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self.name,
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len(self._module_map) - module_count,
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len(self._schema_map) - schema_count,
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(time.time() - t_start)))
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def module_detection(self, paths, cache=True):
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"""
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Leverage the @notify decorator and load all objects found matching
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this.
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"""
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# A simple restriction that we don't allow periods in the filename at
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# all so it can't be hidden (Linux OS's) and it won't conflict with
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# Python path naming. This also prevents us from loading any python
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# file that starts with an underscore or dash
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# We allow for __init__.py as well
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module_re = re.compile(
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r'^(?P<name>[_a-z0-9][a-z0-9._-]+)?(\.py)?$', re.I)
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# Validate if we're a loadable Python file or not
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valid_python_file_re = re.compile(r'.+\.py(o|c)?$', re.IGNORECASE)
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if isinstance(paths, str):
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paths = [paths, ]
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if not paths or not isinstance(paths, (tuple, list)):
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# We're done
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return
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def _import_module(path):
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# Since our plugin name can conflict (as a module) with another
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# we want to generate random strings to avoid steping on
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# another's namespace
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if not (path and valid_python_file_re.match(path)):
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# Ignore file/module type
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logger.trace('Plugin Scan: Skipping %s', path)
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return
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t_start = time.time()
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module_name = hashlib.sha1(path.encode('utf-8')).hexdigest()
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module_pyname = "{prefix}.{name}".format(
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prefix='apprise.custom.module', name=module_name)
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if module_pyname in self._custom_module_map:
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# First clear out existing entries
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for schema in \
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self._custom_module_map[module_pyname]['notify']\
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.keys():
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# Remove any mapped modules to this file
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del self._schema_map[schema]
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# Reset
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del self._custom_module_map[module_pyname]
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# Load our module
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module = import_module(path, module_pyname)
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if not module:
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# No problem, we can't use this object
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logger.warning('Failed to load custom module: %s', _path)
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return
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# Print our loaded modules if any
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if module_pyname in self._custom_module_map:
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logger.debug(
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'Custom module %s - %d schema(s) (name=%s) '
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'loaded in %.6fs', _path,
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len(self._custom_module_map[module_pyname]['notify']),
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module_name, (time.time() - t_start))
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# Add our plugin name to our module map
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self._module_map[module_name] = {
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'plugin': set(),
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'module': module,
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'path': module_pyname,
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'native': False,
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}
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for schema, meta in\
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self._custom_module_map[module_pyname]['notify']\
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.items():
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# For mapping purposes; map our element in our main list
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self._module_map[module_name]['plugin'].add(
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self._schema_map[schema])
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# Log our success
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logger.info('Loaded custom notification: %s://', schema)
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else:
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# The code reaches here if we successfully loaded the Python
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# module but no hooks/triggers were found. So we can safely
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# just remove/ignore this entry
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del sys.modules[module_pyname]
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return
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# end of _import_module()
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return
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for _path in paths:
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path = os.path.abspath(os.path.expanduser(_path))
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if (cache and path in self._paths_previously_scanned) \
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or not os.path.exists(path):
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# We're done as we've already scanned this
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continue
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# Store our path as a way of hashing it has been handled
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self._paths_previously_scanned.add(path)
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if os.path.isdir(path) and not \
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os.path.isfile(os.path.join(path, '__init__.py')):
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logger.debug('Scanning for custom plugins in: %s', path)
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for entry in os.listdir(path):
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re_match = module_re.match(entry)
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if not re_match:
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# keep going
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logger.trace('Plugin Scan: Ignoring %s', entry)
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continue
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new_path = os.path.join(path, entry)
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if os.path.isdir(new_path):
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# Update our path
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new_path = os.path.join(path, entry, '__init__.py')
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if not os.path.isfile(new_path):
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logger.trace(
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'Plugin Scan: Ignoring %s',
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os.path.join(path, entry))
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continue
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if not cache or \
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(cache and new_path not in
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self._paths_previously_scanned):
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# Load our module
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_import_module(new_path)
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# Add our subdir path
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self._paths_previously_scanned.add(new_path)
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else:
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if os.path.isdir(path):
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# This logic is safe to apply because we already
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# validated the directories state above; update our
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# path
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path = os.path.join(path, '__init__.py')
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if cache and path in self._paths_previously_scanned:
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continue
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self._paths_previously_scanned.add(path)
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# directly load as is
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re_match = module_re.match(os.path.basename(path))
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# must be a match and must have a .py extension
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if not re_match or not re_match.group(1):
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# keep going
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logger.trace('Plugin Scan: Ignoring %s', path)
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continue
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# Load our module
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_import_module(path)
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return None
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def add(self, plugin, schemas=None, url=None, send_func=None):
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"""
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Ability to manually add Notification services to our stack
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"""
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if not self:
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# Lazy load
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self.load_modules()
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# Acquire a list of schemas
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p_schemas = parse_list(plugin.secure_protocol, plugin.protocol)
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if isinstance(schemas, str):
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schemas = [schemas, ]
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elif schemas is None:
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# Default
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schemas = p_schemas
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if not schemas or not isinstance(schemas, (set, tuple, list)):
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# We're done
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logger.error(
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'The schemas provided (type %s) is unsupported; '
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'loaded from %s.',
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type(schemas),
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send_func.__name__ if send_func else plugin.__class__.__name__)
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return False
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# Convert our schemas into a set
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schemas = set([s.lower() for s in schemas]) | set(p_schemas)
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# Valdation
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conflict = [s for s in schemas if s in self]
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if conflict:
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# we're already handling this schema
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logger.warning(
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'The schema(s) (%s) are already defined and could not be '
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'loaded from %s%s.',
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', '.join(conflict),
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'custom notify function ' if send_func else '',
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send_func.__name__ if send_func else plugin.__class__.__name__)
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return False
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if send_func:
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# Acquire the function name
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fn_name = send_func.__name__
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# Acquire the python filename path
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path = inspect.getfile(send_func)
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# Acquire our path to our module
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module_name = str(send_func.__module__)
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if module_name not in self._custom_module_map:
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# Support non-dynamic includes as well...
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self._custom_module_map[module_name] = {
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# Name can be useful for indexing back into the
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# _module_map object; this is the key to do it with:
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'name': module_name.split('.')[-1],
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# The path to the module loaded
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'path': path,
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# Initialize our template
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'notify': {},
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}
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for schema in schemas:
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self._custom_module_map[module_name]['notify'][schema] = {
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# The name of the send function the @notify decorator
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# wrapped
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'fn_name': fn_name,
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# The URL that was provided in the @notify decorator call
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# associated with the 'on='
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'url': url,
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}
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else:
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module_name = hashlib.sha1(
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''.join(schemas).encode('utf-8')).hexdigest()
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module_pyname = "{prefix}.{name}".format(
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prefix='apprise.adhoc.module', name=module_name)
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# Add our plugin name to our module map
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self._module_map[module_name] = {
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'plugin': set([plugin]),
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'module': None,
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'path': module_pyname,
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'native': False,
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}
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for schema in schemas:
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# Assign our mapping
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self._schema_map[schema] = plugin
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return True
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def remove(self, *schemas):
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"""
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Removes a loaded element (if defined)
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"""
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if not self:
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# Lazy load
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self.load_modules()
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for schema in schemas:
|
|
try:
|
|
del self[schema]
|
|
|
|
except KeyError:
|
|
pass
|
|
|
|
def plugins(self, include_disabled=True):
|
|
"""
|
|
Return all of our loaded plugins
|
|
"""
|
|
if not self:
|
|
# Lazy load
|
|
self.load_modules()
|
|
|
|
for module in self._module_map.values():
|
|
for plugin in module['plugin']:
|
|
if not include_disabled and not plugin.enabled:
|
|
continue
|
|
yield plugin
|
|
|
|
def schemas(self, include_disabled=True):
|
|
"""
|
|
Return all of our loaded schemas
|
|
|
|
if include_disabled == True, then even disabled notifications are
|
|
returned
|
|
"""
|
|
if not self:
|
|
# Lazy load
|
|
self.load_modules()
|
|
|
|
# Return our list
|
|
return list(self._schema_map.keys()) if include_disabled else \
|
|
[s for s in self._schema_map.keys() if self._schema_map[s].enabled]
|
|
|
|
def disable(self, *schemas):
|
|
"""
|
|
Disables the modules associated with the specified schemas
|
|
"""
|
|
if not self:
|
|
# Lazy load
|
|
self.load_modules()
|
|
|
|
for schema in schemas:
|
|
if schema not in self._schema_map:
|
|
continue
|
|
|
|
if not self._schema_map[schema].enabled:
|
|
continue
|
|
|
|
# Disable
|
|
self._schema_map[schema].enabled = False
|
|
self._disabled.add(schema)
|
|
|
|
def enable_only(self, *schemas):
|
|
"""
|
|
Disables the modules associated with the specified schemas
|
|
"""
|
|
if not self:
|
|
# Lazy load
|
|
self.load_modules()
|
|
|
|
# convert to set for faster indexing
|
|
schemas = set(schemas)
|
|
|
|
for plugin in self.plugins():
|
|
# Get our plugin's schema list
|
|
p_schemas = set(
|
|
parse_list(plugin.secure_protocol, plugin.protocol))
|
|
|
|
if not schemas & p_schemas:
|
|
if plugin.enabled:
|
|
# Disable it (only if previously enabled); this prevents us
|
|
# from adjusting schemas that were disabled due to missing
|
|
# libraries or other environment reasons
|
|
plugin.enabled = False
|
|
self._disabled |= p_schemas
|
|
continue
|
|
|
|
# If we reach here, our schema was flagged to be enabled
|
|
if p_schemas & self._disabled:
|
|
# Previously disabled; no worries, let's clear this up
|
|
self._disabled -= p_schemas
|
|
plugin.enabled = True
|
|
|
|
def __contains__(self, schema):
|
|
"""
|
|
Checks if a schema exists
|
|
"""
|
|
if not self:
|
|
# Lazy load
|
|
self.load_modules()
|
|
|
|
return schema in self._schema_map
|
|
|
|
def __delitem__(self, schema):
|
|
if not self:
|
|
# Lazy load
|
|
self.load_modules()
|
|
|
|
# Get our plugin (otherwise we throw a KeyError) which is
|
|
# intended on del action that doesn't align
|
|
plugin = self._schema_map[schema]
|
|
|
|
# Our list of all schema entries
|
|
p_schemas = set([schema])
|
|
|
|
for key in list(self._module_map.keys()):
|
|
if plugin in self._module_map[key]['plugin']:
|
|
# Remove our plugin
|
|
self._module_map[key]['plugin'].remove(plugin)
|
|
|
|
# Custom Plugin Entry; Clean up cross reference
|
|
module_pyname = self._module_map[key]['path']
|
|
if not self._module_map[key]['native'] and \
|
|
module_pyname in self._custom_module_map:
|
|
|
|
del self.\
|
|
_custom_module_map[module_pyname]['notify'][schema]
|
|
|
|
if not self._custom_module_map[module_pyname]['notify']:
|
|
#
|
|
# Last custom loaded element
|
|
#
|
|
|
|
# Free up custom object entry
|
|
del self._custom_module_map[module_pyname]
|
|
|
|
if not self._module_map[key]['plugin']:
|
|
#
|
|
# Last element
|
|
#
|
|
if self._module_map[key]['native']:
|
|
# Get our plugin's schema list
|
|
p_schemas = \
|
|
set([s for s in parse_list(
|
|
plugin.secure_protocol, plugin.protocol)
|
|
if s in self._schema_map])
|
|
|
|
# free system memory
|
|
if self._module_map[key]['module']:
|
|
del sys.modules[self._module_map[key]['path']]
|
|
|
|
# free last remaining pointer in module map
|
|
del self._module_map[key]
|
|
|
|
for schema in p_schemas:
|
|
# Final Tidy
|
|
del self._schema_map[schema]
|
|
|
|
def __setitem__(self, schema, plugin):
|
|
"""
|
|
Support fast assigning of Plugin/Notification Objects
|
|
"""
|
|
if not self:
|
|
# Lazy load
|
|
self.load_modules()
|
|
|
|
# Set default values if not otherwise set
|
|
if not plugin.service_name:
|
|
# Assign service name if one doesn't exist
|
|
plugin.service_name = f'{schema}://'
|
|
|
|
p_schemas = set(
|
|
parse_list(plugin.secure_protocol, plugin.protocol))
|
|
if not p_schemas:
|
|
# Assign our protocol
|
|
plugin.secure_protocol = schema
|
|
p_schemas.add(schema)
|
|
|
|
elif schema not in p_schemas:
|
|
# Add our others (if defined)
|
|
plugin.secure_protocol = \
|
|
set([schema] + parse_list(plugin.secure_protocol))
|
|
p_schemas.add(schema)
|
|
|
|
if not self.add(plugin, schemas=p_schemas):
|
|
raise KeyError('Conflicting Assignment')
|
|
|
|
def __getitem__(self, schema):
|
|
"""
|
|
Returns the indexed plugin identified by the schema specified
|
|
"""
|
|
if not self:
|
|
# Lazy load
|
|
self.load_modules()
|
|
|
|
return self._schema_map[schema]
|
|
|
|
def __iter__(self):
|
|
"""
|
|
Returns an iterator so we can iterate over our loaded modules
|
|
"""
|
|
if not self:
|
|
# Lazy load
|
|
self.load_modules()
|
|
|
|
return iter(self._module_map.values())
|
|
|
|
def __len__(self):
|
|
"""
|
|
Returns the number of modules/plugins loaded
|
|
"""
|
|
if not self:
|
|
# Lazy load
|
|
self.load_modules()
|
|
|
|
return len(self._module_map)
|
|
|
|
def __bool__(self):
|
|
"""
|
|
Determines if object has loaded or not
|
|
"""
|
|
return True if self._loaded and self._module_map is not None else False
|