278 lines
9.8 KiB
Python
278 lines
9.8 KiB
Python
import grequests
|
|
from itertools import izip_longest, chain
|
|
from datetime import datetime
|
|
from operator import itemgetter
|
|
from urlparse import urlparse, unquote
|
|
from searx.engines import (
|
|
categories, engines, engine_shortcuts
|
|
)
|
|
from searx.languages import language_codes
|
|
from searx.utils import gen_useragent
|
|
|
|
number_of_searches = 0
|
|
|
|
|
|
def default_request_params():
|
|
return {
|
|
'method': 'GET', 'headers': {}, 'data': {}, 'url': '', 'cookies': {}}
|
|
|
|
|
|
def make_callback(engine_name, results, suggestions, callback, params):
|
|
# creating a callback wrapper for the search engine results
|
|
def process_callback(response, **kwargs):
|
|
cb_res = []
|
|
response.search_params = params
|
|
engines[engine_name].stats['page_load_time'] += \
|
|
(datetime.now() - params['started']).total_seconds()
|
|
try:
|
|
search_results = callback(response)
|
|
except Exception, e:
|
|
engines[engine_name].stats['errors'] += 1
|
|
results[engine_name] = cb_res
|
|
print '[E] Error with engine "{0}":\n\t{1}'.format(
|
|
engine_name, str(e))
|
|
return
|
|
for result in search_results:
|
|
result['engine'] = engine_name
|
|
if 'suggestion' in result:
|
|
# TODO type checks
|
|
suggestions.add(result['suggestion'])
|
|
continue
|
|
cb_res.append(result)
|
|
results[engine_name] = cb_res
|
|
return process_callback
|
|
|
|
|
|
def score_results(results):
|
|
flat_res = filter(
|
|
None, chain.from_iterable(izip_longest(*results.values())))
|
|
flat_len = len(flat_res)
|
|
engines_len = len(results)
|
|
results = []
|
|
# deduplication + scoring
|
|
for i, res in enumerate(flat_res):
|
|
|
|
res['parsed_url'] = urlparse(res['url'])
|
|
|
|
res['host'] = res['parsed_url'].netloc
|
|
|
|
if res['host'].startswith('www.'):
|
|
res['host'] = res['host'].replace('www.', '', 1)
|
|
|
|
res['engines'] = [res['engine']]
|
|
weight = 1.0
|
|
|
|
if hasattr(engines[res['engine']], 'weight'):
|
|
weight = float(engines[res['engine']].weight)
|
|
|
|
score = int((flat_len - i) / engines_len) * weight + 1
|
|
duplicated = False
|
|
|
|
for new_res in results:
|
|
p1 = res['parsed_url'].path[:-1] if res['parsed_url'].path.endswith('/') else res['parsed_url'].path # noqa
|
|
p2 = new_res['parsed_url'].path[:-1] if new_res['parsed_url'].path.endswith('/') else new_res['parsed_url'].path # noqa
|
|
if res['host'] == new_res['host'] and\
|
|
unquote(p1) == unquote(p2) and\
|
|
res['parsed_url'].query == new_res['parsed_url'].query and\
|
|
res.get('template') == new_res.get('template'):
|
|
duplicated = new_res
|
|
break
|
|
if duplicated:
|
|
if res.get('content') > duplicated.get('content'):
|
|
duplicated['content'] = res['content']
|
|
duplicated['score'] += score
|
|
duplicated['engines'].append(res['engine'])
|
|
if duplicated['parsed_url'].scheme == 'https':
|
|
continue
|
|
elif res['parsed_url'].scheme == 'https':
|
|
duplicated['url'] = res['parsed_url'].geturl()
|
|
duplicated['parsed_url'] = res['parsed_url']
|
|
else:
|
|
res['score'] = score
|
|
results.append(res)
|
|
return sorted(results, key=itemgetter('score'), reverse=True)
|
|
|
|
|
|
class Search(object):
|
|
|
|
"""Search information container"""
|
|
|
|
def __init__(self, request):
|
|
super(Search, self).__init__()
|
|
self.query = None
|
|
self.engines = []
|
|
self.categories = []
|
|
self.paging = False
|
|
self.pageno = 1
|
|
self.lang = 'all'
|
|
if request.cookies.get('blocked_engines'):
|
|
self.blocked_engines = request.cookies['blocked_engines'].split(',') # noqa
|
|
else:
|
|
self.blocked_engines = []
|
|
self.results = []
|
|
self.suggestions = []
|
|
self.request_data = {}
|
|
|
|
if request.cookies.get('language')\
|
|
and request.cookies['language'] in (x[0] for x in language_codes):
|
|
self.lang = request.cookies['language']
|
|
|
|
if request.method == 'POST':
|
|
self.request_data = request.form
|
|
else:
|
|
self.request_data = request.args
|
|
|
|
# TODO better exceptions
|
|
if not self.request_data.get('q'):
|
|
raise Exception('noquery')
|
|
|
|
self.query = self.request_data['q']
|
|
|
|
pageno_param = self.request_data.get('pageno', '1')
|
|
if not pageno_param.isdigit() or int(pageno_param) < 1:
|
|
raise Exception('wrong pagenumber')
|
|
|
|
self.pageno = int(pageno_param)
|
|
|
|
self.parse_query()
|
|
|
|
self.categories = []
|
|
|
|
if self.engines:
|
|
self.categories = list(set(engine['category']
|
|
for engine in self.engines))
|
|
else:
|
|
for pd_name, pd in self.request_data.items():
|
|
if pd_name.startswith('category_'):
|
|
category = pd_name[9:]
|
|
if not category in categories:
|
|
continue
|
|
self.categories.append(category)
|
|
if not self.categories:
|
|
cookie_categories = request.cookies.get('categories', '')
|
|
cookie_categories = cookie_categories.split(',')
|
|
for ccateg in cookie_categories:
|
|
if ccateg in categories:
|
|
self.categories.append(ccateg)
|
|
if not self.categories:
|
|
self.categories = ['general']
|
|
|
|
for categ in self.categories:
|
|
self.engines.extend({'category': categ,
|
|
'name': x.name}
|
|
for x in categories[categ]
|
|
if not x.name in self.blocked_engines)
|
|
|
|
def parse_query(self):
|
|
query_parts = self.query.split()
|
|
modified = False
|
|
if query_parts[0].startswith(':'):
|
|
lang = query_parts[0][1:].lower()
|
|
|
|
for lc in language_codes:
|
|
lang_id, lang_name, country = map(str.lower, lc)
|
|
if lang == lang_id\
|
|
or lang_id.startswith(lang)\
|
|
or lang == lang_name\
|
|
or lang == country:
|
|
self.lang = lang
|
|
modified = True
|
|
break
|
|
|
|
elif query_parts[0].startswith('!'):
|
|
prefix = query_parts[0][1:].replace('_', ' ')
|
|
|
|
if prefix in engine_shortcuts\
|
|
and not engine_shortcuts[prefix] in self.blocked_engines:
|
|
modified = True
|
|
self.engines.append({'category': 'none',
|
|
'name': engine_shortcuts[prefix]})
|
|
elif prefix in engines\
|
|
and not prefix in self.blocked_engines:
|
|
modified = True
|
|
self.engines.append({'category': 'none',
|
|
'name': prefix})
|
|
elif prefix in categories:
|
|
modified = True
|
|
self.engines.extend({'category': prefix,
|
|
'name': engine.name}
|
|
for engine in categories[prefix]
|
|
if not engine in self.blocked_engines)
|
|
if modified:
|
|
self.query = self.query.replace(query_parts[0], '', 1).strip()
|
|
self.parse_query()
|
|
|
|
def search(self, request):
|
|
global number_of_searches
|
|
requests = []
|
|
results = {}
|
|
suggestions = set()
|
|
number_of_searches += 1
|
|
#user_agent = request.headers.get('User-Agent', '')
|
|
user_agent = gen_useragent()
|
|
|
|
for selected_engine in self.engines:
|
|
if selected_engine['name'] not in engines:
|
|
continue
|
|
|
|
engine = engines[selected_engine['name']]
|
|
|
|
if self.pageno > 1 and not engine.paging:
|
|
continue
|
|
|
|
if self.lang != 'all' and not engine.language_support:
|
|
continue
|
|
|
|
request_params = default_request_params()
|
|
request_params['headers']['User-Agent'] = user_agent
|
|
request_params['category'] = selected_engine['category']
|
|
request_params['started'] = datetime.now()
|
|
request_params['pageno'] = self.pageno
|
|
request_params['language'] = self.lang
|
|
request_params = engine.request(self.query.encode('utf-8'),
|
|
request_params)
|
|
|
|
if request_params['url'] is None:
|
|
# TODO add support of offline engines
|
|
pass
|
|
|
|
callback = make_callback(
|
|
selected_engine['name'],
|
|
results,
|
|
suggestions,
|
|
engine.response,
|
|
request_params
|
|
)
|
|
|
|
request_args = dict(
|
|
headers=request_params['headers'],
|
|
hooks=dict(response=callback),
|
|
cookies=request_params['cookies'],
|
|
timeout=engine.timeout
|
|
)
|
|
|
|
if request_params['method'] == 'GET':
|
|
req = grequests.get
|
|
else:
|
|
req = grequests.post
|
|
request_args['data'] = request_params['data']
|
|
|
|
# ignoring empty urls
|
|
if not request_params['url']:
|
|
continue
|
|
|
|
requests.append(req(request_params['url'], **request_args))
|
|
grequests.map(requests)
|
|
for engine_name, engine_results in results.items():
|
|
engines[engine_name].stats['search_count'] += 1
|
|
engines[engine_name].stats['result_count'] += len(engine_results)
|
|
|
|
results = score_results(results)
|
|
|
|
for result in results:
|
|
for res_engine in result['engines']:
|
|
engines[result['engine']]\
|
|
.stats['score_count'] += result['score']
|
|
|
|
return results, suggestions
|