128 lines
3.7 KiB
Python
128 lines
3.7 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, eval_xpath
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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 eval_xpath(dom, '//div[@class="sa_cc"]'):
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link = eval_xpath(result, './/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(eval_xpath(result, './/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 eval_xpath(dom, '//li[@class="b_algo"]'):
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link = eval_xpath(result, './/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(eval_xpath(result, './/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(eval_xpath(dom, '//span[@class="sb_count"]//text()'))
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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 result_len and _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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lang_tags = set()
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setmkt = re.compile('setmkt=([^&]*)')
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dom = html.fromstring(resp.text)
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lang_links = eval_xpath(dom, "//li/a[contains(@href, 'setmkt')]")
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for a in lang_links:
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href = eval_xpath(a, './@href')[0]
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match = setmkt.search(href)
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l_tag = match.groups()[0]
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_lang, _nation = l_tag.split('-', 1)
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l_tag = _lang.lower() + '-' + _nation.upper()
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lang_tags.add(l_tag)
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return list(lang_tags)
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