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
|
from os.path import realpath, dirname, splitext, join
from os import listdir
from imp import load_source
import grequests
from itertools import izip_longest, chain
from operator import itemgetter
engine_dir = dirname(realpath(__file__))
engines = {}
for filename in listdir(engine_dir):
modname = splitext(filename)[0]
if filename.startswith('_') or not filename.endswith('.py'):
continue
filepath = join(engine_dir, filename)
engine = load_source(modname, filepath)
if not hasattr(engine, 'request') or not hasattr(engine, 'response'):
continue
engines[modname] = engine
def default_request_params():
return {'method': 'GET', 'headers': {}, 'data': {}, 'url': ''}
def make_callback(engine_name, results, callback):
def process_callback(response, **kwargs):
cb_res = []
for result in callback(response):
result['engine'] = engine_name
cb_res.append(result)
results[engine_name] = cb_res
return process_callback
def search(query, request, selected_engines):
global engines
requests = []
results = {}
user_agent = request.headers.get('User-Agent', '')
for ename, engine in engines.items():
if ename not in selected_engines:
continue
headers = default_request_params()
headers['User-Agent'] = user_agent
request_params = engine.request(query, headers)
callback = make_callback(ename, results, engine.response)
if request_params['method'] == 'GET':
req = grequests.get(request_params['url']
,headers=headers
,hooks=dict(response=callback)
)
else:
req = grequests.post(request_params['url']
,data=request_params['data']
,headers=headers
,hooks=dict(response=callback)
)
requests.append(req)
grequests.map(requests)
flat_res = list(filter(None, chain(*izip_longest(*results.values()))))
flat_len = len(flat_res)
results = []
# deduplication + scoring
for i,res in enumerate(flat_res):
score = flat_len - i
duplicated = False
for new_res in results:
if res['url'] == new_res['url']:
duplicated = new_res
break
if duplicated:
if len(res['content']) > len(duplicated):
duplicated['content'] = res['content']
duplicated['score'] += score
else:
res['score'] = score
results.append(res)
return sorted(results, key=itemgetter('score'), reverse=True)
|
