mirror of
https://github.com/searxng/searxng.git
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266 lines
10 KiB
Python
266 lines
10 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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from urllib.parse import urlparse
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from time import time
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import threading
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import requests.exceptions
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import searx.poolrequests as poolrequests
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from searx.engines import settings
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from searx import logger
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from searx.utils import gen_useragent
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from searx.exceptions import (SearxEngineAccessDeniedException, SearxEngineCaptchaException,
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SearxEngineTooManyRequestsException,)
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from searx.metrology.error_recorder import record_exception, record_error
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from searx.search.processors.abstract import EngineProcessor
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logger = logger.getChild('search.processor.online')
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def default_request_params():
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return {
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'method': 'GET',
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'headers': {},
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'data': {},
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'url': '',
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'cookies': {},
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'verify': True,
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'auth': None
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}
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class OnlineProcessor(EngineProcessor):
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engine_type = 'online'
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def get_params(self, search_query, engine_category):
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params = super().get_params(search_query, engine_category)
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if params is None:
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return None
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# skip suspended engines
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if self.engine.suspend_end_time >= time():
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logger.debug('Engine currently suspended: %s', self.engine_name)
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return None
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# add default params
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params.update(default_request_params())
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# add an user agent
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params['headers']['User-Agent'] = gen_useragent()
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return params
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def _send_http_request(self, params):
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# create dictionary which contain all
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# informations about the request
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request_args = dict(
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headers=params['headers'],
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cookies=params['cookies'],
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verify=params['verify'],
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auth=params['auth']
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)
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# setting engine based proxies
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if hasattr(self.engine, 'proxies'):
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request_args['proxies'] = poolrequests.get_proxies(self.engine.proxies)
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# max_redirects
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max_redirects = params.get('max_redirects')
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if max_redirects:
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request_args['max_redirects'] = max_redirects
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# allow_redirects
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if 'allow_redirects' in params:
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request_args['allow_redirects'] = params['allow_redirects']
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# soft_max_redirects
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soft_max_redirects = params.get('soft_max_redirects', max_redirects or 0)
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# raise_for_status
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request_args['raise_for_httperror'] = params.get('raise_for_httperror', True)
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# specific type of request (GET or POST)
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if params['method'] == 'GET':
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req = poolrequests.get
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else:
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req = poolrequests.post
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request_args['data'] = params['data']
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# send the request
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response = req(params['url'], **request_args)
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# check soft limit of the redirect count
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if len(response.history) > soft_max_redirects:
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# unexpected redirect : record an error
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# but the engine might still return valid results.
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status_code = str(response.status_code or '')
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reason = response.reason or ''
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hostname = str(urlparse(response.url or '').netloc)
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record_error(self.engine_name,
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'{} redirects, maximum: {}'.format(len(response.history), soft_max_redirects),
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(status_code, reason, hostname))
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return response
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def _search_basic(self, query, params):
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# update request parameters dependent on
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# search-engine (contained in engines folder)
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self.engine.request(query, params)
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# ignoring empty urls
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if params['url'] is None:
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return None
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if not params['url']:
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return None
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# send request
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response = self._send_http_request(params)
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# parse the response
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response.search_params = params
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return self.engine.response(response)
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def search(self, query, params, result_container, start_time, timeout_limit):
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# set timeout for all HTTP requests
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poolrequests.set_timeout_for_thread(timeout_limit, start_time=start_time)
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# reset the HTTP total time
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poolrequests.reset_time_for_thread()
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# enable HTTP only if explicitly enabled
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poolrequests.set_enable_http_protocol(self.engine.enable_http)
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# suppose everything will be alright
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requests_exception = False
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suspended_time = None
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try:
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# send requests and parse the results
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search_results = self._search_basic(query, params)
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# check if the engine accepted the request
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if search_results is not None:
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# yes, so add results
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result_container.extend(self.engine_name, search_results)
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# update engine time when there is no exception
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engine_time = time() - start_time
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page_load_time = poolrequests.get_time_for_thread()
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result_container.add_timing(self.engine_name, engine_time, page_load_time)
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with threading.RLock():
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self.engine.stats['engine_time'] += engine_time
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self.engine.stats['engine_time_count'] += 1
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# update stats with the total HTTP time
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self.engine.stats['page_load_time'] += page_load_time
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self.engine.stats['page_load_count'] += 1
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except Exception as e:
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record_exception(self.engine_name, e)
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# Timing
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engine_time = time() - start_time
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page_load_time = poolrequests.get_time_for_thread()
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result_container.add_timing(self.engine_name, engine_time, page_load_time)
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# Record the errors
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with threading.RLock():
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self.engine.stats['errors'] += 1
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if (issubclass(e.__class__, requests.exceptions.Timeout)):
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result_container.add_unresponsive_engine(self.engine_name, 'HTTP timeout')
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# requests timeout (connect or read)
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logger.error("engine {0} : HTTP requests timeout"
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"(search duration : {1} s, timeout: {2} s) : {3}"
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.format(self.engine_name, engine_time, timeout_limit, e.__class__.__name__))
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requests_exception = True
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elif (issubclass(e.__class__, requests.exceptions.RequestException)):
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result_container.add_unresponsive_engine(self.engine_name, 'HTTP error')
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# other requests exception
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logger.exception("engine {0} : requests exception"
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"(search duration : {1} s, timeout: {2} s) : {3}"
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.format(self.engine_name, engine_time, timeout_limit, e))
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requests_exception = True
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elif (issubclass(e.__class__, SearxEngineCaptchaException)):
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result_container.add_unresponsive_engine(self.engine_name, 'CAPTCHA required')
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logger.exception('engine {0} : CAPTCHA'.format(self.engine_name))
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suspended_time = e.suspended_time # pylint: disable=no-member
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elif (issubclass(e.__class__, SearxEngineTooManyRequestsException)):
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result_container.add_unresponsive_engine(self.engine_name, 'too many requests')
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logger.exception('engine {0} : Too many requests'.format(self.engine_name))
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suspended_time = e.suspended_time # pylint: disable=no-member
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elif (issubclass(e.__class__, SearxEngineAccessDeniedException)):
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result_container.add_unresponsive_engine(self.engine_name, 'blocked')
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logger.exception('engine {0} : Searx is blocked'.format(self.engine_name))
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suspended_time = e.suspended_time # pylint: disable=no-member
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else:
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result_container.add_unresponsive_engine(self.engine_name, 'unexpected crash')
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# others errors
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logger.exception('engine {0} : exception : {1}'.format(self.engine_name, e))
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else:
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if getattr(threading.current_thread(), '_timeout', False):
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record_error(self.engine_name, 'Timeout')
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# suspend the engine if there is an HTTP error
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# or suspended_time is defined
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with threading.RLock():
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if requests_exception or suspended_time:
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# update continuous_errors / suspend_end_time
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self.engine.continuous_errors += 1
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if suspended_time is None:
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suspended_time = min(settings['search']['max_ban_time_on_fail'],
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self.engine.continuous_errors * settings['search']['ban_time_on_fail'])
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self.engine.suspend_end_time = time() + suspended_time
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else:
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# reset the suspend variables
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self.engine.continuous_errors = 0
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self.engine.suspend_end_time = 0
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def get_default_tests(self):
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tests = {}
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tests['simple'] = {
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'matrix': {'query': ('life', 'computer')},
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'result_container': ['not_empty'],
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}
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if getattr(self.engine, 'paging', False):
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tests['paging'] = {
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'matrix': {'query': 'time',
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'pageno': (1, 2, 3)},
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'result_container': ['not_empty'],
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'test': ['unique_results']
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}
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if 'general' in self.engine.categories:
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# avoid documentation about HTML tags (<time> and <input type="time">)
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tests['paging']['matrix']['query'] = 'news'
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if getattr(self.engine, 'time_range', False):
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tests['time_range'] = {
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'matrix': {'query': 'news',
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'time_range': (None, 'day')},
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'result_container': ['not_empty'],
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'test': ['unique_results']
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}
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if getattr(self.engine, 'supported_languages', []):
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tests['lang_fr'] = {
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'matrix': {'query': 'paris', 'lang': 'fr'},
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'result_container': ['not_empty', ('has_language', 'fr')],
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}
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tests['lang_en'] = {
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'matrix': {'query': 'paris', 'lang': 'en'},
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'result_container': ['not_empty', ('has_language', 'en')],
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}
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if getattr(self.engine, 'safesearch', False):
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tests['safesearch'] = {
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'matrix': {'query': 'porn',
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'safesearch': (0, 2)},
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'test': ['unique_results']
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}
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return tests
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