Ponysearch/searx/engines/bing.py
Marc Abonce Seguin 772c048d01 refactor engine's search language handling
Add match_language function in utils to match any user given
language code with a list of engine's supported languages.

Also add language_aliases dict on each engine to translate
standard language codes into the custom codes used by the engine.
2018-03-27 00:08:03 -06:00

100 lines
2.8 KiB
Python

"""
Bing (Web)
@website https://www.bing.com
@provide-api yes (http://datamarket.azure.com/dataset/bing/search),
max. 5000 query/month
@using-api no (because of query limit)
@results HTML (using search portal)
@stable no (HTML can change)
@parse url, title, content
@todo publishedDate
"""
from lxml import html
from searx.engines.xpath import extract_text
from searx.url_utils import urlencode
from searx.utils import match_language
# engine dependent config
categories = ['general']
paging = True
language_support = True
supported_languages_url = 'https://www.bing.com/account/general'
language_aliases = {'zh-CN': 'zh-CHS', 'zh-TW': 'zh-CHT', 'zh-HK': 'zh-CHT'}
# search-url
base_url = 'https://www.bing.com/'
search_string = 'search?{query}&first={offset}'
# do search-request
def request(query, params):
offset = (params['pageno'] - 1) * 10 + 1
lang = match_language(params['language'], supported_languages, language_aliases)
query = u'language:{} {}'.format(lang.split('-')[0].upper(), query.decode('utf-8')).encode('utf-8')
search_path = search_string.format(
query=urlencode({'q': query}),
offset=offset)
params['url'] = base_url + search_path
return params
# get response from search-request
def response(resp):
results = []
dom = html.fromstring(resp.text)
try:
results.append({'number_of_results': int(dom.xpath('//span[@class="sb_count"]/text()')[0]
.split()[0].replace(',', ''))})
except:
pass
# parse results
for result in dom.xpath('//div[@class="sa_cc"]'):
link = result.xpath('.//h3/a')[0]
url = link.attrib.get('href')
title = extract_text(link)
content = extract_text(result.xpath('.//p'))
# append result
results.append({'url': url,
'title': title,
'content': content})
# parse results again if nothing is found yet
for result in dom.xpath('//li[@class="b_algo"]'):
link = result.xpath('.//h2/a')[0]
url = link.attrib.get('href')
title = extract_text(link)
content = extract_text(result.xpath('.//p'))
# append result
results.append({'url': url,
'title': title,
'content': content})
# return results
return results
# get supported languages from their site
def _fetch_supported_languages(resp):
supported_languages = []
dom = html.fromstring(resp.text)
options = dom.xpath('//div[@id="limit-languages"]//input')
for option in options:
code = option.xpath('./@id')[0].replace('_', '-')
if code == 'nb':
code = 'no'
supported_languages.append(code)
return supported_languages