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453 lines
16 KiB
Python
453 lines
16 KiB
Python
# -*- 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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from . import ConfigBase
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from . import CONFIG_FORMATS
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from .manager_config import ConfigurationManager
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from . import URLBase
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from .asset import AppriseAsset
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from . import common
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from .utils import GET_SCHEMA_RE
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from .utils import parse_list
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from .utils import is_exclusive_match
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from .logger import logger
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# Grant access to our Configuration Manager Singleton
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C_MGR = ConfigurationManager()
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class AppriseConfig:
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"""
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Our Apprise Configuration File Manager
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- Supports a list of URLs defined one after another (text format)
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- Supports a destinct YAML configuration format
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"""
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def __init__(self, paths=None, asset=None, cache=True, recursion=0,
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insecure_includes=False, **kwargs):
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"""
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Loads all of the paths specified (if any).
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The path can either be a single string identifying one explicit
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location, otherwise you can pass in a series of locations to scan
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via a list.
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If no path is specified then a default list is used.
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By default we cache our responses so that subsiquent calls does not
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cause the content to be retrieved again. Setting this to False does
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mean more then one call can be made to retrieve the (same) data. This
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method can be somewhat inefficient if disabled and you're set up to
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make remote calls. Only disable caching if you understand the
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consequences.
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You can alternatively set the cache value to an int identifying the
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number of seconds the previously retrieved can exist for before it
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should be considered expired.
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It's also worth nothing that the cache value is only set to elements
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that are not already of subclass ConfigBase()
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recursion defines how deep we recursively handle entries that use the
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`import` keyword. This keyword requires us to fetch more configuration
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from another source and add it to our existing compilation. If the
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file we remotely retrieve also has an `import` reference, we will only
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advance through it if recursion is set to 2 deep. If set to zero
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it is off. There is no limit to how high you set this value. It would
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be recommended to keep it low if you do intend to use it.
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insecure includes by default are disabled. When set to True, all
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Apprise Config files marked to be in STRICT mode are treated as being
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in ALWAYS mode.
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Take a file:// based configuration for example, only a file:// based
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configuration can import another file:// based one. because it is set
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to STRICT mode. If an http:// based configuration file attempted to
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import a file:// one it woul fail. However this import would be
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possible if insecure_includes is set to True.
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There are cases where a self hosting apprise developer may wish to load
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configuration from memory (in a string format) that contains import
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entries (even file:// based ones). In these circumstances if you want
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these includes to be honored, this value must be set to True.
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"""
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# Initialize a server list of URLs
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self.configs = list()
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# Prepare our Asset Object
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self.asset = \
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asset if isinstance(asset, AppriseAsset) else AppriseAsset()
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# Set our cache flag
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self.cache = cache
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# Initialize our recursion value
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self.recursion = recursion
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# Initialize our insecure_includes flag
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self.insecure_includes = insecure_includes
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if paths is not None:
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# Store our path(s)
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self.add(paths)
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return
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def add(self, configs, asset=None, tag=None, cache=True, recursion=None,
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insecure_includes=None):
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"""
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Adds one or more config URLs into our list.
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You can override the global asset if you wish by including it with the
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config(s) that you add.
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By default we cache our responses so that subsiquent calls does not
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cause the content to be retrieved again. Setting this to False does
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mean more then one call can be made to retrieve the (same) data. This
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method can be somewhat inefficient if disabled and you're set up to
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make remote calls. Only disable caching if you understand the
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consequences.
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You can alternatively set the cache value to an int identifying the
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number of seconds the previously retrieved can exist for before it
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should be considered expired.
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It's also worth nothing that the cache value is only set to elements
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that are not already of subclass ConfigBase()
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Optionally override the default recursion value.
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Optionally override the insecure_includes flag.
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if insecure_includes is set to True then all plugins that are
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set to a STRICT mode will be a treated as ALWAYS.
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"""
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# Initialize our return status
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return_status = True
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# Initialize our default cache value
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cache = cache if cache is not None else self.cache
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# Initialize our default recursion value
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recursion = recursion if recursion is not None else self.recursion
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# Initialize our default insecure_includes value
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insecure_includes = \
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insecure_includes if insecure_includes is not None \
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else self.insecure_includes
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if asset is None:
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# prepare default asset
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asset = self.asset
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if isinstance(configs, ConfigBase):
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# Go ahead and just add our configuration into our list
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self.configs.append(configs)
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return True
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elif isinstance(configs, str):
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# Save our path
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configs = (configs, )
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elif not isinstance(configs, (tuple, set, list)):
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logger.error(
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'An invalid configuration path (type={}) was '
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'specified.'.format(type(configs)))
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return False
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# Iterate over our configuration
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for _config in configs:
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if isinstance(_config, ConfigBase):
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# Go ahead and just add our configuration into our list
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self.configs.append(_config)
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continue
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elif not isinstance(_config, str):
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logger.warning(
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"An invalid configuration (type={}) was specified.".format(
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type(_config)))
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return_status = False
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continue
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logger.debug("Loading configuration: {}".format(_config))
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# Instantiate ourselves an object, this function throws or
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# returns None if it fails
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instance = AppriseConfig.instantiate(
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_config, asset=asset, tag=tag, cache=cache,
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recursion=recursion, insecure_includes=insecure_includes)
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if not isinstance(instance, ConfigBase):
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return_status = False
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continue
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# Add our initialized plugin to our server listings
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self.configs.append(instance)
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# Return our status
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return return_status
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def add_config(self, content, asset=None, tag=None, format=None,
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recursion=None, insecure_includes=None):
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"""
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Adds one configuration file in it's raw format. Content gets loaded as
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a memory based object and only exists for the life of this
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AppriseConfig object it was loaded into.
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If you know the format ('yaml' or 'text') you can specify
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it for slightly less overhead during this call. Otherwise the
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configuration is auto-detected.
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Optionally override the default recursion value.
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Optionally override the insecure_includes flag.
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if insecure_includes is set to True then all plugins that are
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set to a STRICT mode will be a treated as ALWAYS.
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"""
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# Initialize our default recursion value
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recursion = recursion if recursion is not None else self.recursion
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# Initialize our default insecure_includes value
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insecure_includes = \
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insecure_includes if insecure_includes is not None \
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else self.insecure_includes
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if asset is None:
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# prepare default asset
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asset = self.asset
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if not isinstance(content, str):
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logger.warning(
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"An invalid configuration (type={}) was specified.".format(
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type(content)))
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return False
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logger.debug("Loading raw configuration: {}".format(content))
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# Create ourselves a ConfigMemory Object to store our configuration
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instance = C_MGR['memory'](
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content=content, format=format, asset=asset, tag=tag,
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recursion=recursion, insecure_includes=insecure_includes)
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if instance.config_format not in CONFIG_FORMATS:
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logger.warning(
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"The format of the configuration could not be deteced.")
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return False
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# Add our initialized plugin to our server listings
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self.configs.append(instance)
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# Return our status
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return True
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def servers(self, tag=common.MATCH_ALL_TAG, match_always=True, *args,
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**kwargs):
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"""
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Returns all of our servers dynamically build based on parsed
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configuration.
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If a tag is specified, it applies to the configuration sources
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themselves and not the notification services inside them.
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This is for filtering the configuration files polled for
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results.
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If the anytag is set, then any notification that is found
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set with that tag are included in the response.
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"""
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# A match_always flag allows us to pick up on our 'any' keyword
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# and notify these services under all circumstances
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match_always = common.MATCH_ALWAYS_TAG if match_always else None
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# Build our tag setup
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# - top level entries are treated as an 'or'
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# - second level (or more) entries are treated as 'and'
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#
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# examples:
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# tag="tagA, tagB" = tagA or tagB
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# tag=['tagA', 'tagB'] = tagA or tagB
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# tag=[('tagA', 'tagC'), 'tagB'] = (tagA and tagC) or tagB
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# tag=[('tagB', 'tagC')] = tagB and tagC
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response = list()
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for entry in self.configs:
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# Apply our tag matching based on our defined logic
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if is_exclusive_match(
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logic=tag, data=entry.tags, match_all=common.MATCH_ALL_TAG,
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match_always=match_always):
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# Build ourselves a list of services dynamically and return the
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# as a list
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response.extend(entry.servers())
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return response
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@staticmethod
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def instantiate(url, asset=None, tag=None, cache=None,
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recursion=0, insecure_includes=False,
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suppress_exceptions=True):
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"""
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Returns the instance of a instantiated configuration plugin based on
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the provided Config URL. If the url fails to be parsed, then None
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is returned.
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"""
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# Attempt to acquire the schema at the very least to allow our
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# configuration based urls.
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schema = GET_SCHEMA_RE.match(url)
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if schema is None:
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# Plan B is to assume we're dealing with a file
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schema = 'file'
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url = '{}://{}'.format(schema, URLBase.quote(url))
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else:
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# Ensure our schema is always in lower case
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schema = schema.group('schema').lower()
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# Some basic validation
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if schema not in C_MGR:
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logger.warning('Unsupported schema {}.'.format(schema))
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return None
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# Parse our url details of the server object as dictionary containing
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# all of the information parsed from our URL
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results = C_MGR[schema].parse_url(url)
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if not results:
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# Failed to parse the server URL
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logger.warning('Unparseable URL {}.'.format(url))
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return None
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# Build a list of tags to associate with the newly added notifications
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results['tag'] = set(parse_list(tag))
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# Prepare our Asset Object
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results['asset'] = \
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asset if isinstance(asset, AppriseAsset) else AppriseAsset()
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if cache is not None:
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# Force an over-ride of the cache value to what we have specified
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results['cache'] = cache
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# Recursion can never be parsed from the URL
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results['recursion'] = recursion
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# Insecure includes flag can never be parsed from the URL
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results['insecure_includes'] = insecure_includes
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if suppress_exceptions:
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try:
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# Attempt to create an instance of our plugin using the parsed
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# URL information
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cfg_plugin = C_MGR[results['schema']](**results)
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except Exception:
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# the arguments are invalid or can not be used.
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logger.warning('Could not load URL: %s' % url)
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return None
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else:
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# Attempt to create an instance of our plugin using the parsed
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# URL information but don't wrap it in a try catch
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cfg_plugin = C_MGR[results['schema']](**results)
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return cfg_plugin
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def clear(self):
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"""
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Empties our configuration list
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"""
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self.configs[:] = []
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def server_pop(self, index):
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"""
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Removes an indexed Apprise Notification from the servers
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"""
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# Tracking variables
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prev_offset = -1
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offset = prev_offset
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for entry in self.configs:
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servers = entry.servers(cache=True)
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if len(servers) > 0:
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# Acquire a new maximum offset to work with
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offset = prev_offset + len(servers)
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if offset >= index:
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# we can pop an notification from our config stack
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return entry.pop(index if prev_offset == -1
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else (index - prev_offset - 1))
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# Update our old offset
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prev_offset = offset
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# If we reach here, then we indexed out of range
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raise IndexError('list index out of range')
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def pop(self, index=-1):
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"""
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Removes an indexed Apprise Configuration from the stack and returns it.
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By default, the last element is removed from the list
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"""
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# Remove our entry
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return self.configs.pop(index)
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def __getitem__(self, index):
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"""
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Returns the indexed config entry of a loaded apprise configuration
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"""
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return self.configs[index]
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def __bool__(self):
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"""
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Allows the Apprise object to be wrapped in an 'if statement'.
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True is returned if at least one service has been loaded.
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"""
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return True if self.configs else False
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def __iter__(self):
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"""
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Returns an iterator to our config list
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"""
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return iter(self.configs)
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def __len__(self):
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"""
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Returns the number of config entries loaded
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"""
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return len(self.configs)
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