772c048d01
Add match_language function in utils to match any user given language code with a list of engine's supported languages. Also add language_aliases dict on each engine to translate standard language codes into the custom codes used by the engine.
345 lines
13 KiB
Python
345 lines
13 KiB
Python
from base64 import urlsafe_b64encode, urlsafe_b64decode
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from zlib import compress, decompress
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from sys import version
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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.url_utils import parse_qs, urlencode
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if version[0] == '3':
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unicode = str
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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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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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pass
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class ValidationException(Exception):
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pass
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class Setting(object):
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"""Base class of user settings"""
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def __init__(self, default_value, **kwargs):
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super(Setting, self).__init__()
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self.value = default_value
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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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self.value = data
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def get_value(self):
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return self.value
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def save(self, name, resp):
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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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pass
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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 _validate_selection(self, selection):
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if selection not in self.choices:
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raise ValidationException('Invalid value: "{0}"'.format(selection))
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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 parse(self, data):
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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:
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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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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):
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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:
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self.value.append(choice)
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def save(self, name, resp):
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resp.set_cookie(name, ','.join(self.value), 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 parse(self, data):
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if data not in self.choices and data != self.value:
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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('-')[0]
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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.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():
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raise ValidationException('Invalid default value')
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def parse(self, data):
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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
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def save(self, name, resp):
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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):
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return items
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def transform_values(self, values):
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return values
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def parse_cookie(self, data):
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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):
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items = self.transform_form_items(items)
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self.disabled = set()
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self.enabled = set()
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for choice in self.choices:
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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):
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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):
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disabled = self.disabled
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for choice in self.choices:
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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):
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enabled = self.enabled
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for choice in self.choices:
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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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def _post_init(self):
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super(EnginesSetting, self)._post_init()
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transformed_choices = []
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for engine_name, engine in self.choices.items():
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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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def _post_init(self):
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super(PluginsSetting, self)._post_init()
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transformed_choices = []
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for plugin in self.choices:
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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(object):
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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(Preferences, self).__init__()
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self.key_value_settings = {'categories': MultipleChoiceSetting(['general'], choices=categories + ['none']),
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'language': SearchLanguageSetting(settings['search']['language'],
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choices=LANGUAGE_CODES),
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'locale': EnumStringSetting(settings['ui']['default_locale'],
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choices=list(settings['locales'].keys()) + ['']),
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'autocomplete': EnumStringSetting(settings['search']['autocomplete'],
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choices=list(autocomplete.backends.keys()) + ['']),
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'image_proxy': MapSetting(settings['server']['image_proxy'],
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map={'': 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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'method': EnumStringSetting('POST', choices=('GET', 'POST')),
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'safesearch': MapSetting(settings['search']['safe_search'], map={'0': 0,
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'1': 1,
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'2': 2}),
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'theme': EnumStringSetting(settings['ui']['default_theme'], choices=themes),
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'results_on_new_tab': MapSetting(False, map={'0': False,
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'1': True,
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'False': False,
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'True': True}),
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'doi_resolver': MultipleChoiceSetting(['oadoi.org'], choices=DOI_RESOLVERS),
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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.unknown_params = {}
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def get_as_url_params(self):
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settings_kv = {}
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for k, v in self.key_value_settings.items():
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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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return urlsafe_b64encode(compress(urlencode(settings_kv).encode('utf-8'))).decode('utf-8')
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def parse_encoded_data(self, input_data):
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decoded_data = decompress(urlsafe_b64decode(input_data.encode('utf-8')))
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self.parse_dict({x: y[0] for x, y in parse_qs(unicode(decoded_data)).items()})
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def parse_dict(self, input_data):
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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 == '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 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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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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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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if user_setting_name in self.key_value_settings:
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return 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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return self.unknown_params[user_setting_name]
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def save(self, resp):
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for user_setting_name, user_setting in self.key_value_settings.items():
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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)
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for k, v in self.unknown_params.items():
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resp.set_cookie(k, v, max_age=COOKIE_MAX_AGE)
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return resp
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