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# SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint
"""Bing (Web)
- https://github.com/searx/searx/issues/2019#issuecomment-648227442
"""
# pylint: disable=too-many-branches
import re
from urllib.parse import urlencode, urlparse, parse_qs
from lxml import html
from searx.utils import eval_xpath, extract_text, eval_xpath_list, match_language
from searx.network import multi_requests, Request
about = {
"website": 'https://www.bing.com',
"wikidata_id": 'Q182496',
"official_api_documentation": 'https://www.microsoft.com/en-us/bing/apis/bing-web-search-api',
"use_official_api": False,
"require_api_key": False,
"results": 'HTML',
}
# engine dependent config
categories = ['general', 'web']
paging = True
time_range_support = False
safesearch = False
send_accept_language_header = True
supported_languages_url = 'https://www.bing.com/account/general'
language_aliases = {}
# search-url
base_url = 'https://www.bing.com/'
# initial query: https://www.bing.com/search?q=foo&search=&form=QBLH
inital_query = 'search?{query}&search=&form=QBLH'
# following queries: https://www.bing.com/search?q=foo&search=&first=11&FORM=PERE
page_query = 'search?{query}&search=&first={offset}&FORM=PERE'
def _get_offset_from_pageno(pageno):
return (pageno - 1) * 10 + 1
def request(query, params):
offset = _get_offset_from_pageno(params.get('pageno', 1))
# logger.debug("params['pageno'] --> %s", params.get('pageno'))
# logger.debug(" offset --> %s", offset)
search_string = page_query
if offset == 1:
search_string = inital_query
if params['language'] == 'all':
lang = 'EN'
else:
lang = match_language(params['language'], supported_languages, language_aliases)
query = 'language:{} {}'.format(lang.split('-')[0].upper(), query)
search_path = search_string.format(query=urlencode({'q': query}), offset=offset)
if offset > 1:
referer = base_url + inital_query.format(query=urlencode({'q': query}))
params['headers']['Referer'] = referer
logger.debug("headers.Referer --> %s", referer)
params['url'] = base_url + search_path
params['headers']['Accept'] = 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8'
return params
def response(resp):
results = []
result_len = 0
dom = html.fromstring(resp.text)
# parse results again if nothing is found yet
url_to_resolve = []
url_to_resolve_index = []
for i, result in enumerate(eval_xpath_list(dom, '//li[contains(@class, "b_algo")]')):
link = eval_xpath(result, './/h2/a')[0]
url = link.attrib.get('href')
title = extract_text(link)
# Make sure that the element is free of <a href> links and <span class='algoSlug_icon'>
content = eval_xpath(result, '(.//p)[1]')
for p in content:
for e in p.xpath('.//a'):
e.getparent().remove(e)
for e in p.xpath('.//span[@class="algoSlug_icon"]'):
e.getparent().remove(e)
content = extract_text(content)
# get the real URL either using the URL shown to user or following the Bing URL
if url.startswith('https://www.bing.com/ck/a?'):
url_cite = extract_text(eval_xpath(result, './/div[@class="b_attribution"]/cite'))
# Bing can shorten the URL either at the end or in the middle of the string
if (
url_cite.startswith('https://')
and '…' not in url_cite
and '...' not in url_cite
and '›' not in url_cite
):
# no need for an additional HTTP request
url = url_cite
else:
# resolve the URL with an additional HTTP request
url_to_resolve.append(url.replace('&ntb=1', '&ntb=F'))
url_to_resolve_index.append(i)
url = None # remove the result if the HTTP Bing redirect raise an exception
# append result
results.append({'url': url, 'title': title, 'content': content})
# resolve all Bing redirections in parallel
request_list = [
Request.get(u, allow_redirects=False, headers=resp.search_params['headers']) for u in url_to_resolve
]
response_list = multi_requests(request_list)
for i, redirect_response in enumerate(response_list):
if not isinstance(redirect_response, Exception):
results[url_to_resolve_index[i]]['url'] = redirect_response.headers['location']
# get number_of_results
try:
result_len_container = "".join(eval_xpath(dom, '//span[@class="sb_count"]//text()'))
if "-" in result_len_container:
# Remove the part "from-to" for paginated request ...
result_len_container = result_len_container[result_len_container.find("-") * 2 + 2 :]
result_len_container = re.sub('[^0-9]', '', result_len_container)
if len(result_len_container) > 0:
result_len = int(result_len_container)
except Exception as e: # pylint: disable=broad-except
logger.debug('result error :\n%s', e)
if result_len and _get_offset_from_pageno(resp.search_params.get("pageno", 0)) > result_len:
return []
results.append({'number_of_results': result_len})
return results
# get supported languages from their site
def _fetch_supported_languages(resp):
lang_tags = set()
dom = html.fromstring(resp.text)
lang_links = eval_xpath(dom, '//div[@id="language-section"]//li')
for _li in lang_links:
href = eval_xpath(_li, './/@href')[0]
(_scheme, _netloc, _path, _params, query, _fragment) = urlparse(href)
query = parse_qs(query, keep_blank_values=True)
# fmt: off
setlang = query.get('setlang', [None, ])[0]
# example: 'mn-Cyrl-MN' --> '['mn', 'Cyrl-MN']
lang, nation = (setlang.split('-', maxsplit=1) + [None,])[:2] # fmt: skip
# fmt: on
tag = lang + '-' + nation if nation else lang
lang_tags.add(tag)
return list(lang_tags)
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