# SPDX-License-Identifier: AGPL-3.0-or-later # lint: pylint # pylint: disable=missing-module-docstring import typing import threading from timeit import default_timer from uuid import uuid4 from searx import settings from searx.answerers import ask from searx.external_bang import get_bang_url from searx.results import ResultContainer from searx import logger from searx.plugins import plugins from searx.search.models import EngineRef, SearchQuery from searx.engines import load_engines from searx.network import initialize as initialize_network from searx.metrics import initialize as initialize_metrics, counter_inc, histogram_observe_time from searx.search.processors import PROCESSORS, initialize as initialize_processors from searx.search.checker import initialize as initialize_checker logger = logger.getChild('search') def initialize(settings_engines=None, enable_checker=False): settings_engines = settings_engines or settings['engines'] load_engines(settings_engines) initialize_network(settings_engines, settings['outgoing']) initialize_metrics([engine['name'] for engine in settings_engines]) initialize_processors(settings_engines) if enable_checker: initialize_checker() class Search: """Search information container""" __slots__ = "search_query", "result_container", "start_time", "actual_timeout" def __init__(self, search_query): # init vars super().__init__() self.search_query = search_query self.result_container = ResultContainer() self.start_time = None self.actual_timeout = None def search_external_bang(self): """ Check if there is a external bang. If yes, update self.result_container and return True """ if self.search_query.external_bang: self.result_container.redirect_url = get_bang_url(self.search_query) # This means there was a valid bang and the # rest of the search does not need to be continued if isinstance(self.result_container.redirect_url, str): return True return False def search_answerers(self): """ Check if an answer return a result. If yes, update self.result_container and return True """ answerers_results = ask(self.search_query) if answerers_results: for results in answerers_results: self.result_container.extend('answer', results) return True return False # do search-request def _get_requests(self): # init vars requests = [] # max of all selected engine timeout default_timeout = 0 # start search-reqest for all selected engines for engineref in self.search_query.engineref_list: processor = PROCESSORS[engineref.name] # stop the request now if the engine is suspend if processor.extend_container_if_suspended(self.result_container): continue # set default request parameters request_params = processor.get_params(self.search_query, engineref.category) if request_params is None: continue counter_inc('engine', engineref.name, 'search', 'count', 'sent') # append request to list requests.append((engineref.name, self.search_query.query, request_params)) # update default_timeout default_timeout = max(default_timeout, processor.engine.timeout) # adjust timeout max_request_timeout = settings['outgoing']['max_request_timeout'] actual_timeout = default_timeout query_timeout = self.search_query.timeout_limit if max_request_timeout is None and query_timeout is None: # No max, no user query: default_timeout pass elif max_request_timeout is None and query_timeout is not None: # No max, but user query: From user query except if above default actual_timeout = min(default_timeout, query_timeout) elif max_request_timeout is not None and query_timeout is None: # Max, no user query: Default except if above max actual_timeout = min(default_timeout, max_request_timeout) elif max_request_timeout is not None and query_timeout is not None: # Max & user query: From user query except if above max actual_timeout = min(query_timeout, max_request_timeout) logger.debug("actual_timeout={0} (default_timeout={1}, ?timeout_limit={2}, max_request_timeout={3})" .format(actual_timeout, default_timeout, query_timeout, max_request_timeout)) return requests, actual_timeout def search_multiple_requests(self, requests): # pylint: disable=protected-access search_id = uuid4().__str__() for engine_name, query, request_params in requests: th = threading.Thread( # pylint: disable=invalid-name target=PROCESSORS[engine_name].search, args=(query, request_params, self.result_container, self.start_time, self.actual_timeout), name=search_id, ) th._timeout = False th._engine_name = engine_name th.start() for th in threading.enumerate(): # pylint: disable=invalid-name if th.name == search_id: remaining_time = max(0.0, self.actual_timeout - (default_timer() - self.start_time)) th.join(remaining_time) if th.is_alive(): th._timeout = True self.result_container.add_unresponsive_engine(th._engine_name, 'timeout') logger.warning('engine timeout: {0}'.format(th._engine_name)) def search_standard(self): """ Update self.result_container, self.actual_timeout """ requests, self.actual_timeout = self._get_requests() # send all search-request if requests: self.search_multiple_requests(requests) # return results, suggestions, answers and infoboxes return True # do search-request def search(self): self.start_time = default_timer() if not self.search_external_bang(): if not self.search_answerers(): self.search_standard() return self.result_container class SearchWithPlugins(Search): """Similar to the Search class but call the plugins.""" __slots__ = 'ordered_plugin_list', 'request' def __init__(self, search_query, ordered_plugin_list, request): super().__init__(search_query) self.ordered_plugin_list = ordered_plugin_list self.request = request def search(self): if plugins.call(self.ordered_plugin_list, 'pre_search', self.request, self): super().search() plugins.call(self.ordered_plugin_list, 'post_search', self.request, self) results = self.result_container.get_ordered_results() for result in results: plugins.call(self.ordered_plugin_list, 'on_result', self.request, self, result) return self.result_container