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