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"""
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 urllib import urlencode
from lxml.html import fromstring
from searx.engines.xpath import extract_text
from searx.languages import language_codes
# engine dependent config
categories = ['general']
paging = True
language_support = True
time_range_support = True
# search-url
url = 'https://duckduckgo.com/html?{query}&s={offset}'
time_range_url = '&df={range}'
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"]'
# do search-request
def request(query, params):
if params['time_range'] and params['time_range'] not in time_range_dict:
return params
offset = (params['pageno'] - 1) * 30
if params['language'] == 'all':
locale = None
else:
locale = params['language'].split('_')
if len(locale) == 2:
# country code goes first
locale = locale[1].lower() + '-' + locale[0].lower()
else:
# tries to get a country code from language
locale = locale[0].lower()
lang_codes = [x[0] for x in language_codes]
for lc in lang_codes:
lc = lc.split('_')
if locale == lc[0]:
locale = lc[1].lower() + '-' + lc[0].lower()
break
if locale:
params['url'] = url.format(
query=urlencode({'q': query, 'kl': locale}), offset=offset)
else:
params['url'] = url.format(
query=urlencode({'q': query}), offset=offset)
if params['time_range'] in time_range_dict:
params['url'] += time_range_url.format(range=time_range_dict[params['time_range']])
return params
# get response from search-request
def response(resp):
results = []
doc = fromstring(resp.text)
# parse results
for r in doc.xpath(result_xpath):
try:
res_url = r.xpath(url_xpath)[-1]
except:
continue
if not res_url:
continue
title = extract_text(r.xpath(title_xpath))
content = extract_text(r.xpath(content_xpath))
# append result
results.append({'title': title,
'content': content,
'url': res_url})
# return results
return results
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