mirror of https://github.com/searx/searx
269 lines
9.4 KiB
Python
269 lines
9.4 KiB
Python
'''
|
|
searx is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Affero General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
searx is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Affero General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Affero General Public License
|
|
along with searx. If not, see < http://www.gnu.org/licenses/ >.
|
|
|
|
(C) 2013- by Adam Tauber, <asciimoo@gmail.com>
|
|
'''
|
|
|
|
import typing
|
|
import gc
|
|
import threading
|
|
from time import time
|
|
from uuid import uuid4
|
|
from _thread import start_new_thread
|
|
|
|
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.processors import processors, initialize as initialize_processors
|
|
|
|
|
|
logger = logger.getChild('search')
|
|
|
|
max_request_timeout = settings.get('outgoing', {}).get('max_request_timeout' or None)
|
|
if max_request_timeout is None:
|
|
logger.info('max_request_timeout={0}'.format(max_request_timeout))
|
|
else:
|
|
if isinstance(max_request_timeout, float):
|
|
logger.info('max_request_timeout={0} second(s)'.format(max_request_timeout))
|
|
else:
|
|
logger.critical('outgoing.max_request_timeout if defined has to be float')
|
|
import sys
|
|
sys.exit(1)
|
|
|
|
|
|
def initialize(settings_engines=None):
|
|
settings_engines = settings_engines or settings['engines']
|
|
initialize_processors(settings_engines)
|
|
|
|
|
|
class EngineRef:
|
|
|
|
__slots__ = 'name', 'category'
|
|
|
|
def __init__(self, name: str, category: str):
|
|
self.name = name
|
|
self.category = category
|
|
|
|
def __repr__(self):
|
|
return "EngineRef({!r}, {!r})".format(self.name, self.category)
|
|
|
|
def __eq__(self, other):
|
|
return self.name == other.name and self.category == other.category
|
|
|
|
|
|
class SearchQuery:
|
|
"""container for all the search parameters (query, language, etc...)"""
|
|
|
|
__slots__ = 'query', 'engineref_list', 'lang', 'safesearch', 'pageno', 'time_range',\
|
|
'timeout_limit', 'external_bang'
|
|
|
|
def __init__(self,
|
|
query: str,
|
|
engineref_list: typing.List[EngineRef],
|
|
lang: str='all',
|
|
safesearch: int=0,
|
|
pageno: int=1,
|
|
time_range: typing.Optional[str]=None,
|
|
timeout_limit: typing.Optional[float]=None,
|
|
external_bang: typing.Optional[str]=None):
|
|
self.query = query
|
|
self.engineref_list = engineref_list
|
|
self.lang = lang
|
|
self.safesearch = safesearch
|
|
self.pageno = pageno
|
|
self.time_range = time_range
|
|
self.timeout_limit = timeout_limit
|
|
self.external_bang = external_bang
|
|
|
|
@property
|
|
def categories(self):
|
|
return list(set(map(lambda engineref: engineref.category, self.engineref_list)))
|
|
|
|
def __repr__(self):
|
|
return "SearchQuery({!r}, {!r}, {!r}, {!r}, {!r}, {!r}, {!r}, {!r})".\
|
|
format(self.query, self.engineref_list, self.lang, self.safesearch,
|
|
self.pageno, self.time_range, self.timeout_limit, self.external_bang)
|
|
|
|
def __eq__(self, other):
|
|
return self.query == other.query\
|
|
and self.engineref_list == other.engineref_list\
|
|
and self.lang == other.lang\
|
|
and self.safesearch == other.safesearch\
|
|
and self.pageno == other.pageno\
|
|
and self.time_range == other.time_range\
|
|
and self.timeout_limit == other.timeout_limit\
|
|
and self.external_bang == other.external_bang
|
|
|
|
|
|
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]
|
|
|
|
# set default request parameters
|
|
request_params = processor.get_params(self.search_query, engineref.category)
|
|
if request_params is None:
|
|
continue
|
|
|
|
with threading.RLock():
|
|
processor.engine.stats['sent_search_count'] += 1
|
|
|
|
# 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
|
|
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):
|
|
search_id = uuid4().__str__()
|
|
|
|
for engine_name, query, request_params in requests:
|
|
th = threading.Thread(
|
|
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():
|
|
if th.name == search_id:
|
|
remaining_time = max(0.0, self.actual_timeout - (time() - 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)
|
|
start_new_thread(gc.collect, tuple())
|
|
|
|
# return results, suggestions, answers and infoboxes
|
|
return True
|
|
|
|
# do search-request
|
|
def search(self):
|
|
self.start_time = time()
|
|
|
|
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
|