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Fix bing engine results count (#1387)
This PR fixes the result count from bing which was throwing an (hidden) error and add a validation to avoid reading more results than avalaible. For example : If there is 100 results from some search and we try to get results from 120 to 130, Bing will send back the results from 0 to 10 and no error. If we compare results count with the first parameter of the request we can avoid this "invalid" results.
This commit is contained in:
Léo Bourrel
Alexandre Flament
parent
12f891da84
commit
88261e111c
2 changed files with 119 additions and 43 deletions
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@ -13,11 +13,15 @@
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@todo publishedDate
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"""
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import re
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from lxml import html
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from searx import logger, utils
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from searx.engines.xpath import extract_text
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from searx.url_utils import urlencode
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from searx.utils import match_language, gen_useragent
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logger = logger.getChild('bing engine')
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# engine dependent config
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categories = ['general']
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paging = True
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@ -30,9 +34,13 @@ base_url = 'https://www.bing.com/'
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search_string = 'search?{query}&first={offset}'
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def _get_offset_from_pageno(pageno):
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return (pageno - 1) * 10 + 1
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# do search-request
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def request(query, params):
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offset = (params['pageno'] - 1) * 10 + 1
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offset = _get_offset_from_pageno(params.get('pageno', 0))
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if params['language'] == 'all':
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lang = 'EN'
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@ -53,15 +61,9 @@ def request(query, params):
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# get response from search-request
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def response(resp):
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results = []
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result_len = 0
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dom = html.fromstring(resp.text)
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try:
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results.append({'number_of_results': int(dom.xpath('//span[@class="sb_count"]/text()')[0]
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.split()[0].replace(',', ''))})
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except:
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pass
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# parse results
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for result in dom.xpath('//div[@class="sa_cc"]'):
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link = result.xpath('.//h3/a')[0]
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@ -86,7 +88,24 @@ def response(resp):
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'title': title,
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'content': content})
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# return results
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try:
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result_len_container = "".join(dom.xpath('//span[@class="sb_count"]/text()'))
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result_len_container = utils.to_string(result_len_container)
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if "-" in result_len_container:
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# Remove the part "from-to" for paginated request ...
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result_len_container = result_len_container[result_len_container.find("-") * 2 + 2:]
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result_len_container = re.sub('[^0-9]', '', result_len_container)
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if len(result_len_container) > 0:
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result_len = int(result_len_container)
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except Exception as e:
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logger.debug('result error :\n%s', e)
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pass
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if _get_offset_from_pageno(resp.search_params.get("pageno", 0)) > result_len:
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return []
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results.append({'number_of_results': result_len})
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return results
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@ -1,3 +1,4 @@
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# -*- coding: utf-8 -*-
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from collections import defaultdict
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import mock
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from searx.engines import bing
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@ -10,7 +11,7 @@ class TestBingEngine(SearxTestCase):
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bing.supported_languages = ['en', 'fr', 'zh-CHS', 'zh-CHT', 'pt-PT', 'pt-BR']
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query = u'test_query'
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dicto = defaultdict(dict)
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dicto['pageno'] = 0
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dicto['pageno'] = 1
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dicto['language'] = 'fr-FR'
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params = bing.request(query.encode('utf-8'), dicto)
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self.assertTrue('url' in params)
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@ -23,70 +24,126 @@ class TestBingEngine(SearxTestCase):
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self.assertTrue('language' in params['url'])
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def test_response(self):
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dicto = defaultdict(dict)
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dicto['pageno'] = 1
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dicto['language'] = 'fr-FR'
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self.assertRaises(AttributeError, bing.response, None)
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self.assertRaises(AttributeError, bing.response, [])
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self.assertRaises(AttributeError, bing.response, '')
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self.assertRaises(AttributeError, bing.response, '[]')
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response = mock.Mock(text='<html></html>')
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response.search_params = dicto
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self.assertEqual(bing.response(response), [])
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response = mock.Mock(text='<html></html>')
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response.search_params = dicto
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self.assertEqual(bing.response(response), [])
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html = """
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<div class="sa_cc" u="0|5109|4755453613245655|UAGjXgIrPH5yh-o5oNHRx_3Zta87f_QO">
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<div Class="sa_mc">
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<div class="sb_tlst">
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<h3>
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<a href="http://this.should.be.the.link/" h="ID=SERP,5124.1">
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<strong>This</strong> should be the title</a>
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</h3>
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</div>
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<div class="sb_meta"><cite><strong>this</strong>.meta.com</cite>
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<span class="c_tlbxTrg">
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<span class="c_tlbxH" H="BASE:CACHEDPAGEDEFAULT" K="SERP,5125.1">
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</span>
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</span>
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</div>
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<p><strong>This</strong> should be the content.</p>
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<div>
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<div id="b_tween">
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<span class="sb_count" data-bm="4">23 900 000 résultats</span>
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</div>
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<ol id="b_results" role="main">
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<div class="sa_cc" u="0|5109|4755453613245655|UAGjXgIrPH5yh-o5oNHRx_3Zta87f_QO">
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<div Class="sa_mc">
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<div class="sb_tlst">
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<h3>
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<a href="http://this.should.be.the.link/" h="ID=SERP,5124.1">
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<strong>This</strong> should be the title</a>
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</h3>
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</div>
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<div class="sb_meta"><cite><strong>this</strong>.meta.com</cite>
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<span class="c_tlbxTrg">
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<span class="c_tlbxH" H="BASE:CACHEDPAGEDEFAULT" K="SERP,5125.1">
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</span>
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</span>
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</div>
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<p><strong>This</strong> should be the content.</p>
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</div>
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</div>
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</ol>
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</div>
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"""
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response = mock.Mock(text=html)
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response.search_params = dicto
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results = bing.response(response)
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self.assertEqual(type(results), list)
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self.assertEqual(len(results), 1)
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self.assertEqual(len(results), 2)
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self.assertEqual(results[0]['title'], 'This should be the title')
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self.assertEqual(results[0]['url'], 'http://this.should.be.the.link/')
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self.assertEqual(results[0]['content'], 'This should be the content.')
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self.assertEqual(results[-1]['number_of_results'], 23900000)
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html = """
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<li class="b_algo" u="0|5109|4755453613245655|UAGjXgIrPH5yh-o5oNHRx_3Zta87f_QO">
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<div Class="sa_mc">
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<div class="sb_tlst">
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<h2>
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<a href="http://this.should.be.the.link/" h="ID=SERP,5124.1">
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<strong>This</strong> should be the title</a>
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</h2>
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</div>
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<div class="sb_meta"><cite><strong>this</strong>.meta.com</cite>
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<span class="c_tlbxTrg">
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<span class="c_tlbxH" H="BASE:CACHEDPAGEDEFAULT" K="SERP,5125.1">
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</span>
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</span>
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</div>
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<p><strong>This</strong> should be the content.</p>
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<div>
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<div id="b_tween">
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<span class="sb_count" data-bm="4">9-18 résultats sur 23 900 000</span>
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</div>
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</li>
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<ol id="b_results" role="main">
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<li class="b_algo" u="0|5109|4755453613245655|UAGjXgIrPH5yh-o5oNHRx_3Zta87f_QO">
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<div Class="sa_mc">
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<div class="sb_tlst">
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<h2>
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<a href="http://this.should.be.the.link/" h="ID=SERP,5124.1">
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<strong>This</strong> should be the title</a>
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</h2>
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</div>
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<div class="sb_meta"><cite><strong>this</strong>.meta.com</cite>
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<span class="c_tlbxTrg">
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<span class="c_tlbxH" H="BASE:CACHEDPAGEDEFAULT" K="SERP,5125.1">
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</span>
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</span>
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</div>
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<p><strong>This</strong> should be the content.</p>
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</div>
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</li>
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</ol>
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</div>
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"""
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dicto['pageno'] = 2
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response = mock.Mock(text=html)
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response.search_params = dicto
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results = bing.response(response)
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self.assertEqual(type(results), list)
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self.assertEqual(len(results), 1)
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self.assertEqual(len(results), 2)
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self.assertEqual(results[0]['title'], 'This should be the title')
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self.assertEqual(results[0]['url'], 'http://this.should.be.the.link/')
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self.assertEqual(results[0]['content'], 'This should be the content.')
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self.assertEqual(results[-1]['number_of_results'], 23900000)
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html = """
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<div>
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<div id="b_tween">
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<span class="sb_count" data-bm="4">23 900 000 résultats</span>
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</div>
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<ol id="b_results" role="main">
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<li class="b_algo" u="0|5109|4755453613245655|UAGjXgIrPH5yh-o5oNHRx_3Zta87f_QO">
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<div Class="sa_mc">
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<div class="sb_tlst">
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<h2>
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<a href="http://this.should.be.the.link/" h="ID=SERP,5124.1">
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<strong>This</strong> should be the title</a>
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</h2>
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</div>
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<div class="sb_meta"><cite><strong>this</strong>.meta.com</cite>
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<span class="c_tlbxTrg">
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<span class="c_tlbxH" H="BASE:CACHEDPAGEDEFAULT" K="SERP,5125.1">
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</span>
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</span>
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</div>
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<p><strong>This</strong> should be the content.</p>
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</div>
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</li>
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</ol>
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</div>
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"""
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dicto['pageno'] = 33900000
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response = mock.Mock(text=html)
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response.search_params = dicto
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results = bing.response(response)
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self.assertEqual(bing.response(response), [])
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def test_fetch_supported_languages(self):
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html = """<html></html>"""
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