'''
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>
'''
from os.path import realpath, dirname, splitext, join
import sys
from imp import load_source
from flask.ext.babel import gettext
from operator import itemgetter
from searx import settings
from searx import logger
logger = logger.getChild('engines')
engine_dir = dirname(realpath(__file__))
engines = {}
categories = {'general': []}
engine_shortcuts = {}
def load_module(filename):
modname = splitext(filename)[0]
if modname in sys.modules:
del sys.modules[modname]
filepath = join(engine_dir, filename)
module = load_source(modname, filepath)
module.name = modname
return module
def load_engine(engine_data):
engine_name = engine_data['engine']
engine = load_module(engine_name + '.py')
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 = map(
str.strip, engine_data['categories'].split(','))
continue
setattr(engine, param_name, engine_data[param_name])
if not hasattr(engine, 'paging'):
engine.paging = False
if not hasattr(engine, 'categories'):
engine.categories = ['general']
if not hasattr(engine, 'language_support'):
engine.language_support = True
if not hasattr(engine, 'timeout'):
engine.timeout = settings['server']['request_timeout']
if not hasattr(engine, 'shortcut'):
engine.shortcut = ''
if not hasattr(engine, 'disabled'):
engine.disabled = False
# checking required variables
for engine_attr in dir(engine):
if engine_attr.startswith('_'):
continue
if getattr(engine, engine_attr) is None:
logger.error('Missing engine config attribute: "{0}.{1}"'
.format(engine.name, engine_attr))
sys.exit(1)
engine.stats = {
'result_count': 0,
'search_count': 0,
'page_load_time': 0,
'score_count': 0,
'errors': 0
}
if hasattr(engine, 'categories'):
for category_name in engine.categories:
categories.setdefault(category_name, []).append(engine)
else:
categories['general'].append(engine)
if engine.shortcut:
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 get_engines_stats():
# TODO refactor
pageloads = []
results = []
scores = []
errors = []
scores_per_result = []
max_pageload = max_results = max_score = max_errors = max_score_per_result = 0 # noqa
for engine in engines.values():
if engine.stats['search_count'] == 0:
continue
results_num = \
engine.stats['result_count'] / float(engine.stats['search_count'])
load_times = engine.stats['page_load_time'] / float(engine.stats['search_count']) # noqa
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
max_results = max(results_num, max_results)
max_pageload = max(load_times, max_pageload)
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'])
pageloads.append({'avg': load_times, '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
})
for engine in pageloads:
if max_pageload:
engine['percentage'] = int(engine['avg'] / max_pageload * 100)
else:
engine['percentage'] = 0
for engine in results:
if max_results:
engine['percentage'] = int(engine['avg'] / max_results * 100)
else:
engine['percentage'] = 0
for engine in scores:
if max_score:
engine['percentage'] = int(engine['avg'] / max_score * 100)
else:
engine['percentage'] = 0
for engine in scores_per_result:
if max_score_per_result:
engine['percentage'] = int(engine['avg']
/ max_score_per_result * 100)
else:
engine['percentage'] = 0
for engine in errors:
if max_errors:
engine['percentage'] = int(float(engine['avg']) / max_errors * 100)
else:
engine['percentage'] = 0
return [
(
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)
),
]
if 'engines' not in settings or not settings['engines']:
logger.error('No engines found. Edit your settings.yml')
exit(2)
for engine_data in settings['engines']:
engine = load_engine(engine_data)
engines[engine.name] = engine
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