mirror of
https://github.com/searxng/searxng.git
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88261e111c
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.
124 lines
3.6 KiB
Python
124 lines
3.6 KiB
Python
"""
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Bing (Web)
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@website https://www.bing.com
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@provide-api yes (http://datamarket.azure.com/dataset/bing/search),
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max. 5000 query/month
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@using-api no (because of query limit)
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@results HTML (using search portal)
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@stable no (HTML can change)
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@parse url, title, content
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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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language_support = True
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supported_languages_url = 'https://www.bing.com/account/general'
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language_aliases = {'zh-CN': 'zh-CHS', 'zh-TW': 'zh-CHT', 'zh-HK': 'zh-CHT'}
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# search-url
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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 = _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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else:
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lang = match_language(params['language'], supported_languages, language_aliases)
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query = u'language:{} {}'.format(lang.split('-')[0].upper(), query.decode('utf-8')).encode('utf-8')
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search_path = search_string.format(
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query=urlencode({'q': query}),
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offset=offset)
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params['url'] = base_url + search_path
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return 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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# 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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url = link.attrib.get('href')
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title = extract_text(link)
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content = extract_text(result.xpath('.//p'))
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# append result
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results.append({'url': url,
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'title': title,
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'content': content})
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# parse results again if nothing is found yet
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for result in dom.xpath('//li[@class="b_algo"]'):
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link = result.xpath('.//h2/a')[0]
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url = link.attrib.get('href')
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title = extract_text(link)
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content = extract_text(result.xpath('.//p'))
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# append result
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results.append({'url': url,
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'title': title,
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'content': content})
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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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# get supported languages from their site
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def _fetch_supported_languages(resp):
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supported_languages = []
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dom = html.fromstring(resp.text)
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options = dom.xpath('//div[@id="limit-languages"]//input')
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for option in options:
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code = option.xpath('./@id')[0].replace('_', '-')
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if code == 'nb':
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code = 'no'
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supported_languages.append(code)
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return supported_languages
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