1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
|
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
|
