mirror of
https://github.com/searxng/searxng.git
synced 2024-08-21 22:00:19 +02:00
196 lines
7.1 KiB
Python
196 lines
7.1 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
|
|
# lint: pylint
|
|
# pylint: disable=missing-module-docstring, missing-function-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
|