mirror of
https://github.com/searxng/searxng.git
synced 2024-11-05 04:40:11 +01:00
130 lines
3.5 KiB
Python
130 lines
3.5 KiB
Python
"""
|
|
DuckDuckGo (Web)
|
|
|
|
@website https://duckduckgo.com/
|
|
@provide-api yes (https://duckduckgo.com/api),
|
|
but not all results from search-site
|
|
|
|
@using-api no
|
|
@results HTML (using search portal)
|
|
@stable no (HTML can change)
|
|
@parse url, title, content
|
|
|
|
@todo rewrite to api
|
|
"""
|
|
|
|
from lxml.html import fromstring
|
|
from json import loads
|
|
from searx.utils import extract_text, match_language, eval_xpath
|
|
|
|
# engine dependent config
|
|
categories = ['general']
|
|
paging = False
|
|
language_support = True
|
|
supported_languages_url = 'https://duckduckgo.com/util/u172.js'
|
|
time_range_support = True
|
|
|
|
language_aliases = {
|
|
'ar-SA': 'ar-XA',
|
|
'es-419': 'es-XL',
|
|
'ja': 'jp-JP',
|
|
'ko': 'kr-KR',
|
|
'sl-SI': 'sl-SL',
|
|
'zh-TW': 'tzh-TW',
|
|
'zh-HK': 'tzh-HK'
|
|
}
|
|
|
|
# search-url
|
|
url = 'https://html.duckduckgo.com/html'
|
|
time_range_dict = {'day': 'd',
|
|
'week': 'w',
|
|
'month': 'm'}
|
|
|
|
# specific xpath variables
|
|
result_xpath = '//div[@class="result results_links results_links_deep web-result "]' # noqa
|
|
url_xpath = './/a[@class="result__a"]/@href'
|
|
title_xpath = './/a[@class="result__a"]'
|
|
content_xpath = './/a[@class="result__snippet"]'
|
|
correction_xpath = '//div[@id="did_you_mean"]//a'
|
|
|
|
|
|
# match query's language to a region code that duckduckgo will accept
|
|
def get_region_code(lang, lang_list=None):
|
|
if lang == 'all':
|
|
return None
|
|
|
|
lang_code = match_language(lang, lang_list or [], language_aliases, 'wt-WT')
|
|
lang_parts = lang_code.split('-')
|
|
|
|
# country code goes first
|
|
return lang_parts[1].lower() + '-' + lang_parts[0].lower()
|
|
|
|
|
|
def request(query, params):
|
|
if params['time_range'] is not None and params['time_range'] not in time_range_dict:
|
|
return params
|
|
|
|
params['url'] = url
|
|
params['method'] = 'POST'
|
|
params['data']['b'] = ''
|
|
params['data']['q'] = query
|
|
params['data']['df'] = ''
|
|
|
|
region_code = get_region_code(params['language'], supported_languages)
|
|
if region_code:
|
|
params['data']['kl'] = region_code
|
|
params['cookies']['kl'] = region_code
|
|
if params['time_range'] in time_range_dict:
|
|
params['data']['df'] = time_range_dict[params['time_range']]
|
|
|
|
return params
|
|
|
|
|
|
# get response from search-request
|
|
def response(resp):
|
|
results = []
|
|
|
|
doc = fromstring(resp.text)
|
|
|
|
# parse results
|
|
for i, r in enumerate(eval_xpath(doc, result_xpath)):
|
|
if i >= 30:
|
|
break
|
|
try:
|
|
res_url = eval_xpath(r, url_xpath)[-1]
|
|
except:
|
|
continue
|
|
|
|
if not res_url:
|
|
continue
|
|
|
|
title = extract_text(eval_xpath(r, title_xpath))
|
|
content = extract_text(eval_xpath(r, content_xpath))
|
|
|
|
# append result
|
|
results.append({'title': title,
|
|
'content': content,
|
|
'url': res_url})
|
|
|
|
# parse correction
|
|
for correction in eval_xpath(doc, correction_xpath):
|
|
# append correction
|
|
results.append({'correction': extract_text(correction)})
|
|
|
|
# return results
|
|
return results
|
|
|
|
|
|
# get supported languages from their site
|
|
def _fetch_supported_languages(resp):
|
|
|
|
# response is a js file with regions as an embedded object
|
|
response_page = resp.text
|
|
response_page = response_page[response_page.find('regions:{') + 8:]
|
|
response_page = response_page[:response_page.find('}') + 1]
|
|
|
|
regions_json = loads(response_page)
|
|
supported_languages = map((lambda x: x[3:] + '-' + x[:2].upper()), regions_json.keys())
|
|
|
|
return list(supported_languages)
|