from base64 import urlsafe_b64encode, urlsafe_b64decode
from zlib import compress, decompress
from sys import version
from searx import settings, autocomplete
from searx.languages import language_codes as languages
from searx.url_utils import parse_qs, urlencode
if version[0] == '3':
unicode = str
COOKIE_MAX_AGE = 60 * 60 * 24 * 365 * 5 # 5 years
LANGUAGE_CODES = [l[0] for l in languages]
LANGUAGE_CODES.append('all')
DISABLED = 0
ENABLED = 1
DOI_RESOLVERS = list(settings['doi_resolvers'])
class MissingArgumentException(Exception):
pass
class ValidationException(Exception):
pass
class Setting(object):
"""Base class of user settings"""
def __init__(self, default_value, **kwargs):
super(Setting, self).__init__()
self.value = default_value
for key, value in kwargs.items():
setattr(self, key, value)
self._post_init()
def _post_init(self):
pass
def parse(self, data):
self.value = data
def get_value(self):
return self.value
def save(self, name, resp):
resp.set_cookie(name, self.value, max_age=COOKIE_MAX_AGE)
class StringSetting(Setting):
"""Setting of plain string values"""
pass
class EnumStringSetting(Setting):
"""Setting of a value which can only come from the given choices"""
def _validate_selection(self, selection):
if selection not in self.choices:
raise ValidationException('Invalid value: "{0}"'.format(selection))
def _post_init(self):
if not hasattr(self, 'choices'):
raise MissingArgumentException('Missing argument: choices')
self._validate_selection(self.value)
def parse(self, data):
self._validate_selection(data)
self.value = data
class MultipleChoiceSetting(EnumStringSetting):
"""Setting of values which can only come from the given choices"""
def _validate_selections(self, selections):
for item in selections:
if item not in self.choices:
raise ValidationException('Invalid value: "{0}"'.format(selections))
def _post_init(self):
if not hasattr(self, 'choices'):
raise MissingArgumentException('Missing argument: choices')
self._validate_selections(self.value)
def parse(self, data):
if data == '':
self.value = []
return
elements = data.split(',')
self._validate_selections(elements)
self.value = elements
def parse_form(self, data):
self.value = []
for choice in data:
if choice in self.choices and choice not in self.value:
self.value.append(choice)
def save(self, name, resp):
resp.set_cookie(name, ','.join(self.value), max_age=COOKIE_MAX_AGE)
class SearchLanguageSetting(EnumStringSetting):
"""Available choices may change, so user's value may not be in choices anymore"""
def parse(self, data):
if data not in self.choices and data != self.value:
# hack to give some backwards compatibility with old language cookies
data = str(data).replace('_', '-')
lang = data.split('-')[0]
if data in self.choices:
pass
elif lang in self.choices:
data = lang
else:
data = self.value
self.value = data
class MapSetting(Setting):
"""Setting of a value that has to be translated in order to be storable"""
def _post_init(self):
if not hasattr(self, 'map'):
raise MissingArgumentException('missing argument: map')
if self.value not in self.map.values():
raise ValidationException('Invalid default value')
def parse(self, data):
if data not in self.map:
raise ValidationException('Invalid choice: {0}'.format(data))
self.value = self.map[data]
self.key = data
def save(self, name, resp):
if hasattr(self, 'key'):
resp.set_cookie(name, self.key, max_age=COOKIE_MAX_AGE)
class SwitchableSetting(Setting):
""" Base class for settings that can be turned on && off"""
def _post_init(self):
self.disabled = set()
self.enabled = set()
if not hasattr(self, 'choices'):
raise MissingArgumentException('missing argument: choices')
def transform_form_items(self, items):
return items
def transform_values(self, values):
return values
def parse_cookie(self, data):
if data[DISABLED] != '':
self.disabled = set(data[DISABLED].split(','))
if data[ENABLED] != '':
self.enabled = set(data[ENABLED].split(','))
def parse_form(self, items):
items = self.transform_form_items(items)
self.disabled = set()
self.enabled = set()
for choice in self.choices:
if choice['default_on']:
if choice['id'] in items:
self.disabled.add(choice['id'])
else:
if choice['id'] not in items:
self.enabled.add(choice['id'])
def save(self, resp):
resp.set_cookie('disabled_{0}'.format(self.value), ','.join(self.disabled), max_age=COOKIE_MAX_AGE)
resp.set_cookie('enabled_{0}'.format(self.value), ','.join(self.enabled), max_age=COOKIE_MAX_AGE)
def get_disabled(self):
disabled = self.disabled
for choice in self.choices:
if not choice['default_on'] and choice['id'] not in self.enabled:
disabled.add(choice['id'])
return self.transform_values(disabled)
def get_enabled(self):
enabled = self.enabled
for choice in self.choices:
if choice['default_on'] and choice['id'] not in self.disabled:
enabled.add(choice['id'])
return self.transform_values(enabled)
class EnginesSetting(SwitchableSetting):
def _post_init(self):
super(EnginesSetting, self)._post_init()
transformed_choices = []
for engine_name, engine in self.choices.items():
for category in engine.categories:
transformed_choice = dict()
transformed_choice['default_on'] = not engine.disabled
transformed_choice['id'] = '{}__{}'.format(engine_name, category)
transformed_choices.append(transformed_choice)
self.choices = transformed_choices
def transform_form_items(self, items):
return [item[len('engine_'):].replace('_', ' ').replace(' ', '__') for item in items]
def transform_values(self, values):
if len(values) == 1 and next(iter(values)) == '':
return list()
transformed_values = []
for value in values:
engine, category = value.split('__')
transformed_values.append((engine, category))
return transformed_values
class PluginsSetting(SwitchableSetting):
def _post_init(self):
super(PluginsSetting, self)._post_init()
transformed_choices = []
for plugin in self.choices:
transformed_choice = dict()
transformed_choice['default_on'] = plugin.default_on
transformed_choice['id'] = plugin.id
transformed_choices.append(transformed_choice)
self.choices = transformed_choices
def transform_form_items(self, items):
return [item[len('plugin_'):] for item in items]
class Preferences(object):
"""Validates and saves preferences to cookies"""
def __init__(self, themes, categories, engines, plugins):
super(Preferences, self).__init__()
self.key_value_settings = {'categories': MultipleChoiceSetting(['general'], choices=categories + ['none']),
'language': SearchLanguageSetting(settings['search']['language'],
choices=LANGUAGE_CODES),
'locale': EnumStringSetting(settings['ui']['default_locale'],
choices=list(settings['locales'].keys()) + ['']),
'autocomplete': EnumStringSetting(settings['search']['autocomplete'],
choices=list(autocomplete.backends.keys()) + ['']),
'image_proxy': MapSetting(settings['server']['image_proxy'],
map={'': settings['server']['image_proxy'],
'0': False,
'1': True,
'True': True,
'False': False}),
'method': EnumStringSetting('POST', choices=('GET', 'POST')),
'safesearch': MapSetting(settings['search']['safe_search'], map={'0': 0,
'1': 1,
'2': 2}),
'theme': EnumStringSetting(settings['ui']['default_theme'], choices=themes),
'results_on_new_tab': MapSetting(False, map={'0': False,
'1': True,
'False': False,
'True': True}),
'doi_resolver': MultipleChoiceSetting(['oadoi.org'], choices=DOI_RESOLVERS),
'oscar-style': EnumStringSetting(
settings['ui'].get('theme_args', {}).get('oscar_style', 'logicodev'),
choices=['', 'logicodev', 'logicodev-dark', 'pointhi']),
}
self.engines = EnginesSetting('engines', choices=engines)
self.plugins = PluginsSetting('plugins', choices=plugins)
self.unknown_params = {}
def get_as_url_params(self):
settings_kv = {}
for k, v in self.key_value_settings.items():
if isinstance(v, MultipleChoiceSetting):
settings_kv[k] = ','.join(v.get_value())
else:
settings_kv[k] = v.get_value()
settings_kv['disabled_engines'] = ','.join(self.engines.disabled)
settings_kv['enabled_engines'] = ','.join(self.engines.enabled)
settings_kv['disabled_plugins'] = ','.join(self.plugins.disabled)
settings_kv['enabled_plugins'] = ','.join(self.plugins.enabled)
return urlsafe_b64encode(compress(urlencode(settings_kv).encode('utf-8'))).decode('utf-8')
def parse_encoded_data(self, input_data):
decoded_data = decompress(urlsafe_b64decode(input_data.encode('utf-8')))
dict_data = {}
for x, y in parse_qs(decoded_data).items():
dict_data[x.decode('utf8')] = y[0].decode('utf8')
self.parse_dict(dict_data)
def parse_dict(self, input_data):
for user_setting_name, user_setting in input_data.items():
if user_setting_name in self.key_value_settings:
self.key_value_settings[user_setting_name].parse(user_setting)
elif user_setting_name == 'disabled_engines':
self.engines.parse_cookie((input_data.get('disabled_engines', ''),
input_data.get('enabled_engines', '')))
elif user_setting_name == 'disabled_plugins':
self.plugins.parse_cookie((input_data.get('disabled_plugins', ''),
input_data.get('enabled_plugins', '')))
elif not any(user_setting_name.startswith(x) for x in [
'enabled_',
'disabled_',
'engine_',
'category_',
'plugin_']):
self.unknown_params[user_setting_name] = user_setting
def parse_form(self, input_data):
disabled_engines = []
enabled_categories = []
disabled_plugins = []
for user_setting_name, user_setting in input_data.items():
if user_setting_name in self.key_value_settings:
self.key_value_settings[user_setting_name].parse(user_setting)
elif user_setting_name.startswith('engine_'):
disabled_engines.append(user_setting_name)
elif user_setting_name.startswith('category_'):
enabled_categories.append(user_setting_name[len('category_'):])
elif user_setting_name.startswith('plugin_'):
disabled_plugins.append(user_setting_name)
else:
self.unknown_params[user_setting_name] = user_setting
self.key_value_settings['categories'].parse_form(enabled_categories)
self.engines.parse_form(disabled_engines)
self.plugins.parse_form(disabled_plugins)
# cannot be used in case of engines or plugins
def get_value(self, user_setting_name):
if user_setting_name in self.key_value_settings:
return self.key_value_settings[user_setting_name].get_value()
if user_setting_name in self.unknown_params:
return self.unknown_params[user_setting_name]
def save(self, resp):
for user_setting_name, user_setting in self.key_value_settings.items():
user_setting.save(user_setting_name, resp)
self.engines.save(resp)
self.plugins.save(resp)
for k, v in self.unknown_params.items():
resp.set_cookie(k, v, max_age=COOKIE_MAX_AGE)
return resp
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