forked from zaclys/searxng
3397382754
and some other exceptions: * KeyboardInterrupt * SystemExit * RuntimeError * SystemError * ImportError: an engine with an unmet dependency will stop everything.
279 lines
9.8 KiB
Python
279 lines
9.8 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 sys
|
|
import threading
|
|
from os.path import realpath, dirname
|
|
from io import open
|
|
from babel.localedata import locale_identifiers
|
|
from flask_babel import gettext
|
|
from operator import itemgetter
|
|
from json import loads
|
|
from requests import get
|
|
from searx import settings
|
|
from searx import logger
|
|
from searx.utils import load_module, match_language, get_engine_from_settings
|
|
|
|
|
|
logger = logger.getChild('engines')
|
|
|
|
engine_dir = dirname(realpath(__file__))
|
|
|
|
engines = {}
|
|
|
|
categories = {'general': []}
|
|
|
|
languages = loads(open(engine_dir + '/../data/engines_languages.json', 'r', encoding='utf-8').read())
|
|
babel_langs = [lang_parts[0] + '-' + lang_parts[-1] if len(lang_parts) > 1 else lang_parts[0]
|
|
for lang_parts in (lang_code.split('_') for lang_code in locale_identifiers())]
|
|
|
|
engine_shortcuts = {}
|
|
engine_default_args = {'paging': False,
|
|
'categories': ['general'],
|
|
'language_support': True,
|
|
'supported_languages': [],
|
|
'safesearch': False,
|
|
'timeout': settings['outgoing']['request_timeout'],
|
|
'shortcut': '-',
|
|
'disabled': False,
|
|
'suspend_end_time': 0,
|
|
'continuous_errors': 0,
|
|
'time_range_support': False,
|
|
'offline': False,
|
|
'display_error_messages': True,
|
|
'tokens': []}
|
|
|
|
|
|
def load_engine(engine_data):
|
|
engine_name = engine_data['name']
|
|
if '_' in engine_name:
|
|
logger.error('Engine name contains underscore: "{}"'.format(engine_name))
|
|
sys.exit(1)
|
|
|
|
if engine_name.lower() != engine_name:
|
|
logger.warn('Engine name is not lowercase: "{}", converting to lowercase'.format(engine_name))
|
|
engine_name = engine_name.lower()
|
|
engine_data['name'] = engine_name
|
|
|
|
engine_module = engine_data['engine']
|
|
|
|
try:
|
|
engine = load_module(engine_module + '.py', engine_dir)
|
|
except (SyntaxError, KeyboardInterrupt, SystemExit, SystemError, ImportError, RuntimeError) as e:
|
|
logger.exception('Fatal exception in engine "{}"'.format(engine_module))
|
|
sys.exit(1)
|
|
except:
|
|
logger.exception('Cannot load engine "{}"'.format(engine_module))
|
|
return None
|
|
|
|
for param_name in engine_data:
|
|
if param_name == 'engine':
|
|
continue
|
|
if param_name == 'categories':
|
|
if engine_data['categories'] == 'none':
|
|
engine.categories = []
|
|
else:
|
|
engine.categories = list(map(str.strip, engine_data['categories'].split(',')))
|
|
continue
|
|
setattr(engine, param_name, engine_data[param_name])
|
|
|
|
for arg_name, arg_value in engine_default_args.items():
|
|
if not hasattr(engine, arg_name):
|
|
setattr(engine, arg_name, arg_value)
|
|
|
|
# checking required variables
|
|
for engine_attr in dir(engine):
|
|
if engine_attr.startswith('_'):
|
|
continue
|
|
if engine_attr == 'inactive' and getattr(engine, engine_attr) is True:
|
|
return None
|
|
if getattr(engine, engine_attr) is None:
|
|
logger.error('Missing engine config attribute: "{0}.{1}"'
|
|
.format(engine.name, engine_attr))
|
|
sys.exit(1)
|
|
|
|
# assign supported languages from json file
|
|
if engine_data['name'] in languages:
|
|
setattr(engine, 'supported_languages', languages[engine_data['name']])
|
|
|
|
# find custom aliases for non standard language codes
|
|
if hasattr(engine, 'supported_languages'):
|
|
if hasattr(engine, 'language_aliases'):
|
|
language_aliases = getattr(engine, 'language_aliases')
|
|
else:
|
|
language_aliases = {}
|
|
|
|
for engine_lang in getattr(engine, 'supported_languages'):
|
|
iso_lang = match_language(engine_lang, babel_langs, fallback=None)
|
|
if iso_lang and iso_lang != engine_lang and not engine_lang.startswith(iso_lang) and \
|
|
iso_lang not in getattr(engine, 'supported_languages'):
|
|
language_aliases[iso_lang] = engine_lang
|
|
|
|
setattr(engine, 'language_aliases', language_aliases)
|
|
|
|
# assign language fetching method if auxiliary method exists
|
|
if hasattr(engine, '_fetch_supported_languages'):
|
|
setattr(engine, 'fetch_supported_languages',
|
|
lambda: engine._fetch_supported_languages(get(engine.supported_languages_url)))
|
|
|
|
engine.stats = {
|
|
'result_count': 0,
|
|
'search_count': 0,
|
|
'engine_time': 0,
|
|
'engine_time_count': 0,
|
|
'score_count': 0,
|
|
'errors': 0
|
|
}
|
|
|
|
if not engine.offline:
|
|
engine.stats['page_load_time'] = 0
|
|
engine.stats['page_load_count'] = 0
|
|
|
|
for category_name in engine.categories:
|
|
categories.setdefault(category_name, []).append(engine)
|
|
|
|
if engine.shortcut in engine_shortcuts:
|
|
logger.error('Engine config error: ambigious shortcut: {0}'.format(engine.shortcut))
|
|
sys.exit(1)
|
|
|
|
engine_shortcuts[engine.shortcut] = engine.name
|
|
|
|
return engine
|
|
|
|
|
|
def to_percentage(stats, maxvalue):
|
|
for engine_stat in stats:
|
|
if maxvalue:
|
|
engine_stat['percentage'] = int(engine_stat['avg'] / maxvalue * 100)
|
|
else:
|
|
engine_stat['percentage'] = 0
|
|
return stats
|
|
|
|
|
|
def get_engines_stats(preferences):
|
|
# TODO refactor
|
|
pageloads = []
|
|
engine_times = []
|
|
results = []
|
|
scores = []
|
|
errors = []
|
|
scores_per_result = []
|
|
|
|
max_pageload = max_engine_times = max_results = max_score = max_errors = max_score_per_result = 0 # noqa
|
|
for engine in engines.values():
|
|
if not preferences.validate_token(engine):
|
|
continue
|
|
|
|
if engine.stats['search_count'] == 0:
|
|
continue
|
|
|
|
results_num = \
|
|
engine.stats['result_count'] / float(engine.stats['search_count'])
|
|
|
|
if engine.stats['engine_time_count'] != 0:
|
|
this_engine_time = engine.stats['engine_time'] / float(engine.stats['engine_time_count']) # noqa
|
|
else:
|
|
this_engine_time = 0
|
|
|
|
if results_num:
|
|
score = engine.stats['score_count'] / float(engine.stats['search_count']) # noqa
|
|
score_per_result = score / results_num
|
|
else:
|
|
score = score_per_result = 0.0
|
|
|
|
if not engine.offline:
|
|
load_times = 0
|
|
if engine.stats['page_load_count'] != 0:
|
|
load_times = engine.stats['page_load_time'] / float(engine.stats['page_load_count']) # noqa
|
|
max_pageload = max(load_times, max_pageload)
|
|
pageloads.append({'avg': load_times, 'name': engine.name})
|
|
|
|
max_engine_times = max(this_engine_time, max_engine_times)
|
|
max_results = max(results_num, max_results)
|
|
max_score = max(score, max_score)
|
|
max_score_per_result = max(score_per_result, max_score_per_result)
|
|
max_errors = max(max_errors, engine.stats['errors'])
|
|
|
|
engine_times.append({'avg': this_engine_time, 'name': engine.name})
|
|
results.append({'avg': results_num, 'name': engine.name})
|
|
scores.append({'avg': score, 'name': engine.name})
|
|
errors.append({'avg': engine.stats['errors'], 'name': engine.name})
|
|
scores_per_result.append({
|
|
'avg': score_per_result,
|
|
'name': engine.name
|
|
})
|
|
|
|
pageloads = to_percentage(pageloads, max_pageload)
|
|
engine_times = to_percentage(engine_times, max_engine_times)
|
|
results = to_percentage(results, max_results)
|
|
scores = to_percentage(scores, max_score)
|
|
scores_per_result = to_percentage(scores_per_result, max_score_per_result)
|
|
erros = to_percentage(errors, max_errors)
|
|
|
|
return [
|
|
(
|
|
gettext('Engine time (sec)'),
|
|
sorted(engine_times, key=itemgetter('avg'))
|
|
),
|
|
(
|
|
gettext('Page loads (sec)'),
|
|
sorted(pageloads, key=itemgetter('avg'))
|
|
),
|
|
(
|
|
gettext('Number of results'),
|
|
sorted(results, key=itemgetter('avg'), reverse=True)
|
|
),
|
|
(
|
|
gettext('Scores'),
|
|
sorted(scores, key=itemgetter('avg'), reverse=True)
|
|
),
|
|
(
|
|
gettext('Scores per result'),
|
|
sorted(scores_per_result, key=itemgetter('avg'), reverse=True)
|
|
),
|
|
(
|
|
gettext('Errors'),
|
|
sorted(errors, key=itemgetter('avg'), reverse=True)
|
|
),
|
|
]
|
|
|
|
|
|
def load_engines(engine_list):
|
|
global engines
|
|
engines.clear()
|
|
for engine_data in engine_list:
|
|
engine = load_engine(engine_data)
|
|
if engine is not None:
|
|
engines[engine.name] = engine
|
|
return engines
|
|
|
|
|
|
def initialize_engines(engine_list):
|
|
load_engines(engine_list)
|
|
|
|
def engine_init(engine_name, init_fn):
|
|
init_fn(get_engine_from_settings(engine_name))
|
|
logger.debug('%s engine: Initialized', engine_name)
|
|
|
|
for engine_name, engine in engines.items():
|
|
if hasattr(engine, 'init'):
|
|
init_fn = getattr(engine, 'init')
|
|
if init_fn:
|
|
logger.debug('%s engine: Starting background initialization', engine_name)
|
|
threading.Thread(target=engine_init, args=(engine_name, init_fn)).start()
|