mirror of
https://github.com/searxng/searxng.git
synced 2024-11-09 06:30:10 +01:00
538 lines
19 KiB
Python
538 lines
19 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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# lint: pylint
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"""Searx preferences implementation.
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"""
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# pylint: disable=useless-object-inheritance
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from base64 import urlsafe_b64encode, urlsafe_b64decode
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from zlib import compress, decompress
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from urllib.parse import parse_qs, urlencode
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from searx import settings, autocomplete
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from searx.languages import language_codes as languages
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from searx.locales import LOCALE_NAMES
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from searx.webutils import VALID_LANGUAGE_CODE
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COOKIE_MAX_AGE = 60 * 60 * 24 * 365 * 5 # 5 years
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LANGUAGE_CODES = [l[0] for l in languages]
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LANGUAGE_CODES.append('all')
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DISABLED = 0
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ENABLED = 1
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DOI_RESOLVERS = list(settings['doi_resolvers'])
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class MissingArgumentException(Exception):
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"""Exption from ``cls._post_init`` when a argument is missed.
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"""
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class ValidationException(Exception):
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"""Exption from ``cls._post_init`` when configuration value is invalid.
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"""
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class Setting:
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"""Base class of user settings"""
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def __init__(self, default_value, locked=False, **kwargs):
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super().__init__()
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self.value = default_value
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self.locked = locked
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for key, value in kwargs.items():
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setattr(self, key, value)
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self._post_init()
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def _post_init(self):
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pass
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def parse(self, data):
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"""Parse ``data`` and store the result at ``self.value``
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If needed, its overwritten in the inheritance.
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"""
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self.value = data
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def get_value(self):
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"""Returns the value of the setting
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If needed, its overwritten in the inheritance.
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"""
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return self.value
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def save(self, name, resp):
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"""Save cookie ``name`` in the HTTP reponse obect
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If needed, its overwritten in the inheritance."""
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resp.set_cookie(name, self.value, max_age=COOKIE_MAX_AGE)
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class StringSetting(Setting):
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"""Setting of plain string values"""
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class EnumStringSetting(Setting):
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"""Setting of a value which can only come from the given choices"""
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def _post_init(self):
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if not hasattr(self, 'choices'):
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raise MissingArgumentException('Missing argument: choices')
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self._validate_selection(self.value)
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def _validate_selection(self, selection):
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if selection not in self.choices: # pylint: disable=no-member
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raise ValidationException('Invalid value: "{0}"'.format(selection))
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def parse(self, data):
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"""Parse and validate ``data`` and store the result at ``self.value``
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"""
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self._validate_selection(data)
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self.value = data
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class MultipleChoiceSetting(EnumStringSetting):
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"""Setting of values which can only come from the given choices"""
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def _validate_selections(self, selections):
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for item in selections:
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if item not in self.choices: # pylint: disable=no-member
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raise ValidationException('Invalid value: "{0}"'.format(selections))
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def _post_init(self):
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if not hasattr(self, 'choices'):
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raise MissingArgumentException('Missing argument: choices')
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self._validate_selections(self.value)
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def parse(self, data):
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"""Parse and validate ``data`` and store the result at ``self.value``
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"""
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if data == '':
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self.value = []
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return
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elements = data.split(',')
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self._validate_selections(elements)
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self.value = elements
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def parse_form(self, data): # pylint: disable=missing-function-docstring
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if self.locked:
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return
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self.value = []
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for choice in data:
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if choice in self.choices and choice not in self.value: # pylint: disable=no-member
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self.value.append(choice)
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def save(self, name, resp):
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"""Save cookie ``name`` in the HTTP reponse obect
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"""
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resp.set_cookie(name, ','.join(self.value), max_age=COOKIE_MAX_AGE)
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class SetSetting(Setting):
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"""Setting of values of type ``set`` (comma separated string) """
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def _post_init(self):
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if not hasattr(self, 'values'):
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self.values = set()
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def get_value(self):
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"""Returns a string with comma separated values.
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"""
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return ','.join(self.values)
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def parse(self, data):
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"""Parse and validate ``data`` and store the result at ``self.value``
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"""
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if data == '':
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self.values = set() # pylint: disable=attribute-defined-outside-init
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return
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elements = data.split(',')
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for element in elements:
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self.values.add(element)
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def parse_form(self, data): # pylint: disable=missing-function-docstring
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if self.locked:
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return
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elements = data.split(',')
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self.values = set(elements) # pylint: disable=attribute-defined-outside-init
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def save(self, name, resp):
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"""Save cookie ``name`` in the HTTP reponse obect
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"""
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resp.set_cookie(name, ','.join(self.values), max_age=COOKIE_MAX_AGE)
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class SearchLanguageSetting(EnumStringSetting):
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"""Available choices may change, so user's value may not be in choices anymore"""
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def _validate_selection(self, selection):
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if selection != '' and not VALID_LANGUAGE_CODE.match(selection):
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raise ValidationException('Invalid language code: "{0}"'.format(selection))
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def parse(self, data):
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"""Parse and validate ``data`` and store the result at ``self.value``
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"""
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if data not in self.choices and data != self.value: # pylint: disable=no-member
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# hack to give some backwards compatibility with old language cookies
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data = str(data).replace('_', '-')
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lang = data.split('-', maxsplit=1)[0]
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# pylint: disable=no-member
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if data in self.choices:
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pass
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elif lang in self.choices:
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data = lang
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else:
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data = self.value
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self._validate_selection(data)
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self.value = data
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class MapSetting(Setting):
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"""Setting of a value that has to be translated in order to be storable"""
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def _post_init(self):
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if not hasattr(self, 'map'):
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raise MissingArgumentException('missing argument: map')
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if self.value not in self.map.values(): # pylint: disable=no-member
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raise ValidationException('Invalid default value')
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def parse(self, data):
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"""Parse and validate ``data`` and store the result at ``self.value``
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"""
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# pylint: disable=no-member
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if data not in self.map:
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raise ValidationException('Invalid choice: {0}'.format(data))
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self.value = self.map[data]
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self.key = data # pylint: disable=attribute-defined-outside-init
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def save(self, name, resp):
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"""Save cookie ``name`` in the HTTP reponse obect
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"""
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if hasattr(self, 'key'):
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resp.set_cookie(name, self.key, max_age=COOKIE_MAX_AGE)
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class SwitchableSetting(Setting):
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""" Base class for settings that can be turned on && off"""
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def _post_init(self):
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self.disabled = set()
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self.enabled = set()
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if not hasattr(self, 'choices'):
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raise MissingArgumentException('missing argument: choices')
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def transform_form_items(self, items): # pylint: disable=missing-function-docstring
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# pylint: disable=no-self-use
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return items
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def transform_values(self, values): # pylint: disable=missing-function-docstring
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# pylint: disable=no-self-use
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return values
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def parse_cookie(self, data): # pylint: disable=missing-function-docstring
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# pylint: disable=attribute-defined-outside-init
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if data[DISABLED] != '':
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self.disabled = set(data[DISABLED].split(','))
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if data[ENABLED] != '':
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self.enabled = set(data[ENABLED].split(','))
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def parse_form(self, items): # pylint: disable=missing-function-docstring
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if self.locked:
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return
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items = self.transform_form_items(items)
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self.disabled = set() # pylint: disable=attribute-defined-outside-init
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self.enabled = set() # pylint: disable=attribute-defined-outside-init
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for choice in self.choices: # pylint: disable=no-member
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if choice['default_on']:
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if choice['id'] in items:
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self.disabled.add(choice['id'])
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else:
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if choice['id'] not in items:
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self.enabled.add(choice['id'])
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def save(self, resp): # pylint: disable=arguments-differ
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"""Save cookie in the HTTP reponse obect
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"""
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resp.set_cookie('disabled_{0}'.format(self.value), ','.join(self.disabled), max_age=COOKIE_MAX_AGE)
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resp.set_cookie('enabled_{0}'.format(self.value), ','.join(self.enabled), max_age=COOKIE_MAX_AGE)
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def get_disabled(self): # pylint: disable=missing-function-docstring
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disabled = self.disabled
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for choice in self.choices: # pylint: disable=no-member
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if not choice['default_on'] and choice['id'] not in self.enabled:
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disabled.add(choice['id'])
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return self.transform_values(disabled)
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def get_enabled(self): # pylint: disable=missing-function-docstring
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enabled = self.enabled
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for choice in self.choices: # pylint: disable=no-member
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if choice['default_on'] and choice['id'] not in self.disabled:
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enabled.add(choice['id'])
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return self.transform_values(enabled)
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class EnginesSetting(SwitchableSetting):
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"""Engine settings"""
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def _post_init(self):
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super()._post_init()
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transformed_choices = []
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for engine_name, engine in self.choices.items(): # pylint: disable=no-member,access-member-before-definition
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for category in engine.categories:
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transformed_choice = dict()
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transformed_choice['default_on'] = not engine.disabled
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transformed_choice['id'] = '{}__{}'.format(engine_name, category)
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transformed_choices.append(transformed_choice)
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self.choices = transformed_choices
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def transform_form_items(self, items):
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return [item[len('engine_'):].replace('_', ' ').replace(' ', '__') for item in items]
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def transform_values(self, values):
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if len(values) == 1 and next(iter(values)) == '':
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return list()
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transformed_values = []
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for value in values:
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engine, category = value.split('__')
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transformed_values.append((engine, category))
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return transformed_values
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class PluginsSetting(SwitchableSetting):
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"""Plugin settings"""
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def _post_init(self):
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super()._post_init()
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transformed_choices = []
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for plugin in self.choices: # pylint: disable=access-member-before-definition
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transformed_choice = dict()
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transformed_choice['default_on'] = plugin.default_on
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transformed_choice['id'] = plugin.id
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transformed_choices.append(transformed_choice)
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self.choices = transformed_choices
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def transform_form_items(self, items):
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return [item[len('plugin_'):] for item in items]
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class Preferences:
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"""Validates and saves preferences to cookies"""
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def __init__(self, themes, categories, engines, plugins):
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super().__init__()
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self.key_value_settings = {
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'categories': MultipleChoiceSetting(
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['general'],
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is_locked('categories'),
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choices=categories + ['none']
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),
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'language': SearchLanguageSetting(
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settings['search']['default_lang'],
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is_locked('language'),
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choices=list(LANGUAGE_CODES) + ['']
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),
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'locale': EnumStringSetting(
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settings['ui']['default_locale'],
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is_locked('locale'),
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choices=list(LOCALE_NAMES.keys()) + ['']
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),
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'autocomplete': EnumStringSetting(
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settings['search']['autocomplete'],
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is_locked('autocomplete'),
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choices=list(autocomplete.backends.keys()) + ['']
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),
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'image_proxy': MapSetting(
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settings['server']['image_proxy'],
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is_locked('image_proxy'),
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map={
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'': settings['server']['image_proxy'],
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'0': False,
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'1': True,
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'True': True,
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'False': False
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}
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),
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'method': EnumStringSetting(
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settings['server']['method'],
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is_locked('method'),
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choices=('GET', 'POST')
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),
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'safesearch': MapSetting(
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settings['search']['safe_search'],
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is_locked('safesearch'),
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map={
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'0': 0,
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'1': 1,
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'2': 2
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}
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),
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'theme': EnumStringSetting(
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settings['ui']['default_theme'],
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is_locked('theme'),
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choices=themes
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),
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'results_on_new_tab': MapSetting(
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settings['ui']['results_on_new_tab'],
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is_locked('results_on_new_tab'),
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map={
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'0': False,
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'1': True,
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'False': False,
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'True': True
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}
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),
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'doi_resolver': MultipleChoiceSetting(
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[settings['default_doi_resolver'], ],
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is_locked('doi_resolver'),
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choices=DOI_RESOLVERS
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),
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'oscar-style': EnumStringSetting(
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settings['ui']['theme_args']['oscar_style'],
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is_locked('oscar-style'),
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choices=['', 'logicodev', 'logicodev-dark', 'pointhi']),
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'advanced_search': MapSetting(
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settings['ui']['advanced_search'],
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is_locked('advanced_search'),
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map={
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'0': False,
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'1': True,
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'False': False,
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'True': True,
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'on': True,
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}
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),
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}
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self.engines = EnginesSetting('engines', choices=engines)
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self.plugins = PluginsSetting('plugins', choices=plugins)
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self.tokens = SetSetting('tokens')
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self.unknown_params = {}
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def get_as_url_params(self):
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"""Return preferences as URL parameters"""
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settings_kv = {}
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for k, v in self.key_value_settings.items():
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if v.locked:
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continue
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if isinstance(v, MultipleChoiceSetting):
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settings_kv[k] = ','.join(v.get_value())
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else:
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settings_kv[k] = v.get_value()
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settings_kv['disabled_engines'] = ','.join(self.engines.disabled)
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settings_kv['enabled_engines'] = ','.join(self.engines.enabled)
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settings_kv['disabled_plugins'] = ','.join(self.plugins.disabled)
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settings_kv['enabled_plugins'] = ','.join(self.plugins.enabled)
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settings_kv['tokens'] = ','.join(self.tokens.values)
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return urlsafe_b64encode(compress(urlencode(settings_kv).encode())).decode()
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def parse_encoded_data(self, input_data):
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"""parse (base64) preferences from request (``flask.request.form['preferences']``)"""
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bin_data = decompress(urlsafe_b64decode(input_data))
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dict_data = {}
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for x, y in parse_qs(bin_data.decode('ascii')).items():
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dict_data[x] = y[0]
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self.parse_dict(dict_data)
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def parse_dict(self, input_data):
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"""parse preferences from request (``flask.request.form``)"""
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for user_setting_name, user_setting in input_data.items():
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if user_setting_name in self.key_value_settings:
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if self.key_value_settings[user_setting_name].locked:
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continue
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self.key_value_settings[user_setting_name].parse(user_setting)
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elif user_setting_name == 'disabled_engines':
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self.engines.parse_cookie((input_data.get('disabled_engines', ''),
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input_data.get('enabled_engines', '')))
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elif user_setting_name == 'disabled_plugins':
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self.plugins.parse_cookie((input_data.get('disabled_plugins', ''),
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input_data.get('enabled_plugins', '')))
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elif user_setting_name == 'tokens':
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self.tokens.parse(user_setting)
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elif not any(user_setting_name.startswith(x) for x in [
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'enabled_',
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'disabled_',
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'engine_',
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'category_',
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'plugin_']):
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self.unknown_params[user_setting_name] = user_setting
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def parse_form(self, input_data):
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"""Parse formular (``<input>``) data from a ``flask.request.form``"""
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disabled_engines = []
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enabled_categories = []
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disabled_plugins = []
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for user_setting_name, user_setting in input_data.items():
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if user_setting_name in self.key_value_settings:
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self.key_value_settings[user_setting_name].parse(user_setting)
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elif user_setting_name.startswith('engine_'):
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disabled_engines.append(user_setting_name)
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elif user_setting_name.startswith('category_'):
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enabled_categories.append(user_setting_name[len('category_'):])
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elif user_setting_name.startswith('plugin_'):
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disabled_plugins.append(user_setting_name)
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elif user_setting_name == 'tokens':
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self.tokens.parse_form(user_setting)
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else:
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self.unknown_params[user_setting_name] = user_setting
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self.key_value_settings['categories'].parse_form(enabled_categories)
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self.engines.parse_form(disabled_engines)
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self.plugins.parse_form(disabled_plugins)
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# cannot be used in case of engines or plugins
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def get_value(self, user_setting_name):
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"""Returns the value for ``user_setting_name``
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"""
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ret_val = None
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if user_setting_name in self.key_value_settings:
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ret_val = self.key_value_settings[user_setting_name].get_value()
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if user_setting_name in self.unknown_params:
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ret_val = self.unknown_params[user_setting_name]
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return ret_val
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def save(self, resp):
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"""Save cookie in the HTTP reponse obect
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"""
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for user_setting_name, user_setting in self.key_value_settings.items():
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# pylint: disable=unnecessary-dict-index-lookup
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if self.key_value_settings[user_setting_name].locked:
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continue
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user_setting.save(user_setting_name, resp)
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self.engines.save(resp)
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self.plugins.save(resp)
|
|
self.tokens.save('tokens', resp)
|
|
for k, v in self.unknown_params.items():
|
|
resp.set_cookie(k, v, max_age=COOKIE_MAX_AGE)
|
|
return resp
|
|
|
|
def validate_token(self, engine): # pylint: disable=missing-function-docstring
|
|
valid = True
|
|
if hasattr(engine, 'tokens') and engine.tokens:
|
|
valid = False
|
|
for token in self.tokens.values:
|
|
if token in engine.tokens:
|
|
valid = True
|
|
break
|
|
|
|
return valid
|
|
|
|
|
|
def is_locked(setting_name):
|
|
"""Checks if a given setting name is locked by settings.yml
|
|
"""
|
|
if 'preferences' not in settings:
|
|
return False
|
|
if 'lock' not in settings['preferences']:
|
|
return False
|
|
return setting_name in settings['preferences']['lock']
|