forked from zaclys/searxng
237 lines
8.3 KiB
Python
237 lines
8.3 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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# lint: pylint
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"""Implementation of the default settings.
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"""
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import typing
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import numbers
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import errno
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import os
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import logging
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from os.path import dirname, abspath
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from searx.languages import language_codes as languages
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searx_dir = abspath(dirname(__file__))
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logger = logging.getLogger('searx')
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OUTPUT_FORMATS = ['html', 'csv', 'json', 'rss']
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LANGUAGE_CODES = ['all'] + list(l[0] for l in languages)
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OSCAR_STYLE = ('logicodev', 'logicodev-dark', 'pointhi')
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SIMPLE_STYLE = ('auto', 'light', 'dark')
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CATEGORY_ORDER = [
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'general',
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'images',
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'videos',
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'news',
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'map',
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'music',
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'it',
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'science',
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'files',
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'social media',
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]
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STR_TO_BOOL = {
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'0': False,
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'false': False,
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'off': False,
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'1': True,
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'true': True,
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'on': True,
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}
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_UNDEFINED = object()
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# compatibility
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SEARX_ENVIRON_VARIABLES = {
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'SEARX_DISABLE_ETC_SETTINGS': 'SEARXNG_DISABLE_ETC_SETTINGS',
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'SEARX_SETTINGS_PATH': 'SEARXNG_SETTINGS_PATH',
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'SEARX_DEBUG': 'SEARXNG_DEBUG',
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'SEARX_PORT': 'SEARXNG_PORT',
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'SEARX_BIND_ADDRESS': 'SEARXNG_BIND_ADDRESS',
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'SEARX_SECRET': 'SEARXNG_SECRET',
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}
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class SettingsValue:
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"""Check and update a setting value
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"""
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def __init__(self,
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type_definition: typing.Union[None, typing.Any, typing.Tuple[typing.Any]]=None,
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default: typing.Any=None,
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environ_name: str=None):
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self.type_definition = (
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type_definition
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if type_definition is None or isinstance(type_definition, tuple)
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else (type_definition,)
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)
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self.default = default
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self.environ_name = environ_name
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@property
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def type_definition_repr(self):
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types_str = [
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t.__name__ if isinstance(t, type) else repr(t)
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for t in self.type_definition
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]
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return ', '.join(types_str)
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def check_type_definition(self, value: typing.Any) -> None:
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if value in self.type_definition:
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return
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type_list = tuple(t for t in self.type_definition if isinstance(t, type))
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if not isinstance(value, type_list):
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raise ValueError(
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'The value has to be one of these types/values: {}'.format(
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self.type_definition_repr))
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def __call__(self, value: typing.Any) -> typing.Any:
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if value == _UNDEFINED:
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value = self.default
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# override existing value with environ
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if self.environ_name and self.environ_name in os.environ:
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value = os.environ[self.environ_name]
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if self.type_definition == (bool,):
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value = STR_TO_BOOL[value.lower()]
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self.check_type_definition(value)
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return value
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class SettingSublistValue(SettingsValue):
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"""Check the value is a sublist of type definition.
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"""
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def check_type_definition(self, value: typing.Any) -> typing.Any:
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if not isinstance(value, list):
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raise ValueError('The value has to a list')
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for item in value:
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if not item in self.type_definition[0]:
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raise ValueError('{} not in {}'.format(item, self.type_definition))
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class SettingsDirectoryValue(SettingsValue):
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"""Check and update a setting value that is a directory path
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"""
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def check_type_definition(self, value: typing.Any) -> typing.Any:
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super().check_type_definition(value)
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if not os.path.isdir(value):
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raise FileNotFoundError(errno.ENOENT, os.strerror(errno.ENOENT), value)
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def __call__(self, value: typing.Any) -> typing.Any:
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if value == '':
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value = self.default
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return super().__call__(value)
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def apply_schema(settings, schema, path_list):
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error = False
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for key, value in schema.items():
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if isinstance(value, SettingsValue):
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try:
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settings[key] = value(settings.get(key, _UNDEFINED))
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except Exception as e: # pylint: disable=broad-except
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# don't stop now: check other values
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logger.error('%s: %s', '.'.join([*path_list, key]), e)
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error = True
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elif isinstance(value, dict):
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error = error or apply_schema(settings.setdefault(key, {}), schema[key], [*path_list, key])
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else:
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settings.setdefault(key, value)
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if len(path_list) == 0 and error:
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raise ValueError('Invalid settings.yml')
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return error
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SCHEMA = {
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'general': {
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'debug': SettingsValue(bool, False, 'SEARXNG_DEBUG'),
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'instance_name': SettingsValue(str, 'SearXNG'),
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'contact_url': SettingsValue((None, False, str), None),
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},
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'brand': {
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'issue_url': SettingsValue(str, 'https://github.com/searxng/searxng/issues'),
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'new_issue_url': SettingsValue(str, 'https://github.com/searxng/searxng/issues/new'),
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'docs_url': SettingsValue(str, 'https://searxng.github.io/searxng'),
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'public_instances': SettingsValue(str, 'https://searx.space'),
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'wiki_url': SettingsValue(str, 'https://github.com/searxng/searxng/wiki'),
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},
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'search': {
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'safe_search': SettingsValue((0,1,2), 0),
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'autocomplete': SettingsValue(str, ''),
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'default_lang': SettingsValue(tuple(LANGUAGE_CODES + ['']), ''),
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'languages': SettingSublistValue(LANGUAGE_CODES, LANGUAGE_CODES),
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'ban_time_on_fail': SettingsValue(numbers.Real, 5),
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'max_ban_time_on_fail': SettingsValue(numbers.Real, 120),
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'formats': SettingsValue(list, OUTPUT_FORMATS),
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},
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'server': {
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'port': SettingsValue((int,str), 8888, 'SEARXNG_PORT'),
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'bind_address': SettingsValue(str, '127.0.0.1', 'SEARXNG_BIND_ADDRESS'),
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'secret_key': SettingsValue(str, environ_name='SEARXNG_SECRET'),
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'base_url': SettingsValue((False, str), False),
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'image_proxy': SettingsValue(bool, False),
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'http_protocol_version': SettingsValue(('1.0', '1.1'), '1.0'),
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'method': SettingsValue(('POST', 'GET'), 'POST'),
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'default_http_headers': SettingsValue(dict, {}),
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},
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'ui': {
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'static_path': SettingsDirectoryValue(str, os.path.join(searx_dir, 'static')),
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'templates_path': SettingsDirectoryValue(str, os.path.join(searx_dir, 'templates')),
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'default_theme': SettingsValue(str, 'oscar'),
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'default_locale': SettingsValue(str, ''),
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'theme_args': {
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'oscar_style': SettingsValue(OSCAR_STYLE, 'logicodev'),
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'simple_style': SettingsValue(SIMPLE_STYLE, 'auto'),
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},
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'results_on_new_tab': SettingsValue(bool, False),
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'advanced_search': SettingsValue(bool, False),
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'categories_order': SettingsValue(list, CATEGORY_ORDER),
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},
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'preferences': {
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'lock': SettingsValue(list, []),
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},
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'outgoing': {
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'useragent_suffix': SettingsValue(str, ''),
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'request_timeout': SettingsValue(numbers.Real, 3.0),
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'enable_http2': SettingsValue(bool, True),
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'max_request_timeout': SettingsValue((None, numbers.Real), None),
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# Magic number kept from previous code
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'pool_connections': SettingsValue(int, 100),
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# Picked from constructor
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'pool_maxsize': SettingsValue(int, 10),
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'keepalive_expiry': SettingsValue(numbers.Real, 5.0),
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# default maximum redirect
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# from https://github.com/psf/requests/blob/8c211a96cdbe9fe320d63d9e1ae15c5c07e179f8/requests/models.py#L55
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'max_redirects': SettingsValue(int, 30),
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'retries': SettingsValue(int, 0),
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'proxies': SettingsValue((None, str, dict), None),
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'source_ips': SettingsValue((None, str, list), None),
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# Tor configuration
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'using_tor_proxy': SettingsValue(bool, False),
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'extra_proxy_timeout': SettingsValue(int, 0),
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'networks': {
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},
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},
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'plugins': SettingsValue(list, []),
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'enabled_plugins': SettingsValue((None, list), None),
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'checker': {
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'off_when_debug': SettingsValue(bool, True),
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},
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'engines': SettingsValue(list, []),
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'doi_resolvers': {
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},
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}
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def settings_set_defaults(settings):
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# compatibility with searx variables
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for searx, searxng in SEARX_ENVIRON_VARIABLES.items():
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if searx in os.environ and searxng not in os.environ:
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os.environ[searxng] = os.environ[searx]
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logger.warning('%s uses value from %s', searxng, searx)
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apply_schema(settings, SCHEMA, [])
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return settings
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