134 lines
3.8 KiB
Python
134 lines
3.8 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 requests import get
|
|
from json import loads
|
|
from searx.engines.xpath import extract_text
|
|
from searx.url_utils import urlencode
|
|
|
|
# engine dependent config
|
|
categories = ['general']
|
|
paging = True
|
|
language_support = True
|
|
supported_languages_url = 'https://duckduckgo.com/d2030.js'
|
|
time_range_support = True
|
|
|
|
# search-url
|
|
url = 'https://duckduckgo.com/html?{query}&s={offset}&api=/d.js&o=json&dc={dc_param}'
|
|
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 = 30 + (params['pageno'] - 1) * 50
|
|
dc_param = offset + 1
|
|
|
|
# custom fixes for languages
|
|
if params['language'] == 'all':
|
|
locale = None
|
|
elif params['language'][:2] == 'ja':
|
|
locale = 'jp-jp'
|
|
elif params['language'][:2] == 'sl':
|
|
locale = 'sl-sl'
|
|
elif params['language'] == 'zh-TW':
|
|
locale = 'tw-tzh'
|
|
elif params['language'] == 'zh-HK':
|
|
locale = 'hk-tzh'
|
|
elif params['language'][-2:] == 'SA':
|
|
locale = 'xa-' + params['language'].split('-')[0]
|
|
elif params['language'][-2:] == 'GB':
|
|
locale = 'uk-' + params['language'].split('-')[0]
|
|
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()
|
|
for lc in supported_languages:
|
|
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, dc_param=dc_param)
|
|
else:
|
|
params['url'] = url.format(
|
|
query=urlencode({'q': query}), offset=offset, dc_param=dc_param)
|
|
|
|
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
|
|
|
|
|
|
# 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 supported_languages
|