forked from zaclys/searxng
235 lines
8.7 KiB
Python
235 lines
8.7 KiB
Python
import typing
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from searx.exceptions import SearxParameterException
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from searx.query import RawTextQuery, VALID_LANGUAGE_CODE
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from searx.engines import categories, engines
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from searx.search import SearchQuery, EngineRef
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from searx.preferences import Preferences
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# remove duplicate queries.
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# FIXME: does not fix "!music !soundcloud", because the categories are 'none' and 'music'
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def deduplicate_engineref_list(engineref_list: typing.List[EngineRef]) -> typing.List[EngineRef]:
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engineref_dict = {q.category + '|' + q.name: q for q in engineref_list}
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return engineref_dict.values()
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def validate_engineref_list(engineref_list: typing.List[EngineRef], preferences: Preferences):
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"""
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Validate query_engines according to the preferences
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Returns:
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list of existing engines with a validated token
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list of unknown engine
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list of engine with invalid token according to the preferences
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"""
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valid = []
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unknown = []
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no_token = []
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for engineref in engineref_list:
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if engineref.name not in engines:
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unknown.append(engineref)
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continue
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engine = engines[engineref.name]
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if not preferences.validate_token(engine):
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no_token.append(engineref)
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continue
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valid.append(engineref)
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return valid, unknown, no_token
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def parse_pageno(form: typing.Dict[str, str]) -> int:
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pageno_param = form.get('pageno', '1')
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if not pageno_param.isdigit() or int(pageno_param) < 1:
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raise SearxParameterException('pageno', pageno_param)
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return int(pageno_param)
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def parse_lang(raw_text_query: RawTextQuery, form: typing.Dict[str, str], preferences: Preferences) -> str:
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# get language
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# set specific language if set on request, query or preferences
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# TODO support search with multible languages
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if len(raw_text_query.languages):
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query_lang = raw_text_query.languages[-1]
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elif 'language' in form:
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query_lang = form.get('language')
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else:
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query_lang = preferences.get_value('language')
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# check language
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if not VALID_LANGUAGE_CODE.match(query_lang):
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raise SearxParameterException('language', query_lang)
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return query_lang
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def parse_safesearch(form: typing.Dict[str, str], preferences: Preferences) -> int:
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if 'safesearch' in form:
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query_safesearch = form.get('safesearch')
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# first check safesearch
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if not query_safesearch.isdigit():
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raise SearxParameterException('safesearch', query_safesearch)
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query_safesearch = int(query_safesearch)
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else:
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query_safesearch = preferences.get_value('safesearch')
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# safesearch : second check
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if query_safesearch < 0 or query_safesearch > 2:
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raise SearxParameterException('safesearch', query_safesearch)
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return query_safesearch
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def parse_time_range(form: typing.Dict[str, str]) -> str:
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query_time_range = form.get('time_range')
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# check time_range
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query_time_range = None if query_time_range in ('', 'None') else query_time_range
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if query_time_range not in (None, 'day', 'week', 'month', 'year'):
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raise SearxParameterException('time_range', query_time_range)
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return query_time_range
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def parse_timeout(raw_text_query: RawTextQuery, form: typing.Dict[str, str]) -> typing.Optional[float]:
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query_timeout = raw_text_query.timeout_limit
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if query_timeout is None and 'timeout_limit' in form:
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raw_time_limit = form.get('timeout_limit')
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if raw_time_limit in ['None', '']:
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return None
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else:
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try:
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return float(raw_time_limit)
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except ValueError:
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raise SearxParameterException('timeout_limit', raw_time_limit)
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def parse_specific(raw_text_query: RawTextQuery):
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query_engineref_list = raw_text_query.enginerefs
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additional_categories = set()
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for engineref in raw_text_query.enginerefs:
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if engineref.from_bang:
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additional_categories.add('none')
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else:
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additional_categories.add(engineref.category)
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query_categories = list(additional_categories)
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return query_engineref_list, query_categories
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def parse_category_form(query_categories, name, value):
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if name == 'categories':
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query_categories.extend(categ for categ in map(str.strip, value.split(',')) if categ in categories)
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elif name.startswith('category_'):
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category = name[9:]
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# if category is not found in list, skip
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if category not in categories:
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return
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if value != 'off':
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# add category to list
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query_categories.append(category)
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elif category in query_categories:
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# remove category from list if property is set to 'off'
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query_categories.remove(category)
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def get_selected_categories(form, preferences):
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selected_categories = []
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if form is not None:
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for name, value in form.items():
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parse_category_form(selected_categories, name, value)
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# if no category is specified for this search,
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# using user-defined default-configuration which
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# (is stored in cookie)
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if not selected_categories:
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cookie_categories = preferences.get_value('categories')
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for ccateg in cookie_categories:
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selected_categories.append(ccateg)
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# if still no category is specified, using general
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# as default-category
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if not selected_categories:
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selected_categories = ['general']
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return selected_categories
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def parse_generic(form, preferences, disabled_engines):
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query_engineref_list = []
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query_categories = []
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# set categories/engines
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load_default_categories = True
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for pd_name, pd in form.items():
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if pd_name == 'engines':
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pd_engines = [EngineRef(engine_name, engines[engine_name].categories[0])
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for engine_name in map(str.strip, pd.split(',')) if engine_name in engines]
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if pd_engines:
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query_engineref_list.extend(pd_engines)
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load_default_categories = False
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else:
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parse_category_form(query_categories, pd_name, pd)
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if not load_default_categories:
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if not query_categories:
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query_categories = list(set(engine['category']
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for engine in query_engineref_list))
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else:
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if not query_categories:
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query_categories = get_selected_categories(None, preferences)
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# using all engines for that search, which are
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# declared under the specific categories
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for categ in query_categories:
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query_engineref_list.extend(EngineRef(engine.name, categ)
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for engine in categories[categ]
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if (engine.name, categ) not in disabled_engines)
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return query_engineref_list, query_categories
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def get_search_query_from_webapp(preferences: Preferences, form: typing.Dict[str, str])\
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-> typing.Tuple[SearchQuery, RawTextQuery, typing.List[EngineRef], typing.List[EngineRef]]:
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# no text for the query ?
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if not form.get('q'):
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raise SearxParameterException('q', '')
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# set blocked engines
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disabled_engines = preferences.engines.get_disabled()
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# parse query, if tags are set, which change
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# the serch engine or search-language
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raw_text_query = RawTextQuery(form['q'], disabled_engines)
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# set query
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query = raw_text_query.getQuery()
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query_pageno = parse_pageno(form)
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query_lang = parse_lang(raw_text_query, form, preferences)
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query_safesearch = parse_safesearch(form, preferences)
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query_time_range = parse_time_range(form)
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query_timeout = parse_timeout(raw_text_query, form)
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external_bang = raw_text_query.external_bang
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if raw_text_query.enginerefs and raw_text_query.specific:
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# if engines are calculated from query,
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# set categories by using that informations
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query_engineref_list, query_categories = parse_specific(raw_text_query)
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else:
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# otherwise, using defined categories to
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# calculate which engines should be used
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query_engineref_list, query_categories = parse_generic(form, preferences, disabled_engines)
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query_engineref_list = deduplicate_engineref_list(query_engineref_list)
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query_engineref_list, query_engineref_list_unknown, query_engineref_list_notoken =\
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validate_engineref_list(query_engineref_list, preferences)
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return (SearchQuery(query, query_engineref_list, query_categories,
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query_lang, query_safesearch, query_pageno,
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query_time_range, query_timeout,
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external_bang=external_bang),
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raw_text_query,
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query_engineref_list_unknown,
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query_engineref_list_notoken)
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