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https://github.com/searx/searx
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Updated version of "Ddg safe search" PR (#3247)
* fix safe search with ddg engine * fix unused imports * extract title from htmlextractor Co-authored-by: Nivesh Krishna <nivesh@e.email>
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Noémi Ványi
GitHub
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@ -1,24 +1,18 @@
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# SPDX-License-Identifier: AGPL-3.0-or-later
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# lint: pylint
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"""DuckDuckGo Lite
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"""
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DuckDuckGo (Web)
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"""
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from json import loads
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from lxml.html import fromstring
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from searx.utils import (
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dict_subset,
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eval_xpath,
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eval_xpath_getindex,
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extract_text,
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match_language,
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)
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from urllib.parse import urlencode
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from searx.utils import match_language, HTMLTextExtractor
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import re
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from searx.network import get
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# about
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about = {
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"website": 'https://lite.duckduckgo.com/lite',
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"website": 'https://duckduckgo.com/',
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"wikidata_id": 'Q12805',
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"official_api_documentation": 'https://duckduckgo.com/api',
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"use_official_api": False,
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@ -29,9 +23,11 @@ about = {
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# engine dependent config
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categories = ['general']
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paging = True
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supported_languages_url = 'https://duckduckgo.com/util/u588.js'
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supported_languages_url = 'https://duckduckgo.com/util/u172.js'
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number_of_results = 10
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time_range_support = True
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safesearch = True
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VQD_REGEX = r"vqd='(\d+-\d+-\d+)'"
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language_aliases = {
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'ar-SA': 'ar-XA',
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'es-419': 'es-XL',
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@ -42,16 +38,13 @@ language_aliases = {
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'zh-HK': 'tzh-HK'
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}
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time_range_dict = {
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'day': 'd',
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'week': 'w',
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'month': 'm',
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'year': 'y'
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}
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# search-url
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url = 'https://lite.duckduckgo.com/lite'
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url_ping = 'https://duckduckgo.com/t/sl_l'
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url = 'https://links.duckduckgo.com/d.js?'
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url_ping = 'https://duckduckgo.com/t/sl_h'
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time_range_dict = {'day': 'd',
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'week': 'w',
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'month': 'm',
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'year': 'y'}
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# match query's language to a region code that duckduckgo will accept
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@ -66,109 +59,103 @@ def get_region_code(lang, lang_list=None):
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return lang_parts[1].lower() + '-' + lang_parts[0].lower()
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def get_vqd(query, headers):
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resp = get(f"https://duckduckgo.com/?q={query}&ia=web", headers=headers)
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resp = re.findall(VQD_REGEX, resp.text)
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return resp[0]
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def request(query, params):
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params['url'] = url
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params['method'] = 'POST'
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params['method'] = 'GET'
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params['data']['q'] = query
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vqd = get_vqd(query, params['headers'])
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dl, ct = match_language(params['language'], supported_languages, language_aliases, 'wt-WT').split('-')
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query_dict = {
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'q': query,
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't': 'D',
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'l': params['language'],
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'kl': f'{ct}-{dl}',
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's': (params['pageno'] - 1) * number_of_results,
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'dl': dl,
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'ct': ct,
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'ss_mkt': get_region_code(params['language'], supported_languages),
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'df': params['time_range'],
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'vqd': vqd,
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'ex': -2,
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'sp': '1',
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'bpa': '1',
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'biaexp': 'b',
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'msvrtexp': 'b'
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}
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if params['safesearch'] == 2: # STRICT
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del query_dict['t']
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query_dict['p'] = 1
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query_dict.update({
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'videxp': 'a',
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'nadse': 'b',
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'eclsexp': 'a',
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'stiaexp': 'a',
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'tjsexp': 'b',
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'related': 'b',
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'msnexp': 'a'
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})
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elif params['safesearch'] == 1: # MODERATE
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query_dict['ex'] = -1
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query_dict.update({
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'nadse': 'b',
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'eclsexp': 'b',
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'tjsexp': 'b'
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})
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else: # OFF
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query_dict['ex'] = -2
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query_dict.update({
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'nadse': 'b',
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'eclsexp': 'b',
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'tjsexp': 'b'
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})
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# The API is not documented, so we do some reverse engineering and emulate
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# what https://lite.duckduckgo.com/lite/ does when you press "next Page"
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# link again and again ..
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params['headers']['Content-Type'] = 'application/x-www-form-urlencoded'
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# initial page does not have an offset
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if params['pageno'] == 2:
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# second page does have an offset of 30
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offset = (params['pageno'] - 1) * 30
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params['data']['s'] = offset
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params['data']['dc'] = offset + 1
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elif params['pageno'] > 2:
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# third and following pages do have an offset of 30 + n*50
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offset = 30 + (params['pageno'] - 2) * 50
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params['data']['s'] = offset
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params['data']['dc'] = offset + 1
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# initial page does not have additional data in the input form
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if params['pageno'] > 1:
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# request the second page (and more pages) needs 'o' and 'api' arguments
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params['data']['o'] = 'json'
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params['data']['api'] = 'd.js'
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# initial page does not have additional data in the input form
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if params['pageno'] > 2:
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# request the third page (and more pages) some more arguments
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params['data']['nextParams'] = ''
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params['data']['v'] = ''
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params['data']['vqd'] = ''
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region_code = get_region_code(params['language'], supported_languages)
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if region_code:
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params['data']['kl'] = region_code
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params['cookies']['kl'] = region_code
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params['data']['df'] = ''
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params['allow_redirects'] = False
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params['data'] = query_dict
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params['cookies']['kl'] = params['data']['kl']
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if params['time_range'] in time_range_dict:
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params['data']['df'] = time_range_dict[params['time_range']]
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params['cookies']['df'] = time_range_dict[params['time_range']]
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params['url'] = url + urlencode(params['data'])
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return params
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# get response from search-request
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def response(resp):
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headers_ping = dict_subset(resp.request.headers, ['User-Agent', 'Accept-Encoding', 'Accept', 'Cookie'])
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get(url_ping, headers=headers_ping)
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if resp.status_code == 303:
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return []
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# parse the response
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results = []
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doc = fromstring(resp.text)
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result_table = eval_xpath(doc, '//html/body/form/div[@class="filters"]/table')
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if not len(result_table) >= 3:
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# no more results
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return []
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result_table = result_table[2]
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data = re.findall(r"DDG\.pageLayout\.load\('d',(\[.+\])\);DDG\.duckbar\.load\('images'", str(resp.text))
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try:
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search_data = loads(data[0].replace('/\t/g', ' '))
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except IndexError:
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return
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tr_rows = eval_xpath(result_table, './/tr')
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if len(search_data) == 1 and ('n' not in search_data[0]):
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only_result = search_data[0]
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if ((only_result.get('da') is not None and only_result.get('t') == 'EOF') or
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only_result.get('a') is not None or only_result.get('d') == 'google.com search'):
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return
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# In the last <tr> is the form of the 'previous/next page' links
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tr_rows = tr_rows[:-1]
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len_tr_rows = len(tr_rows)
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offset = 0
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while len_tr_rows >= offset + 4:
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# assemble table rows we need to scrap
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tr_title = tr_rows[offset]
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tr_content = tr_rows[offset + 1]
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offset += 4
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# ignore sponsored Adds <tr class="result-sponsored">
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if tr_content.get('class') == 'result-sponsored':
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for search_result in search_data:
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if 'n' in search_result:
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continue
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title = HTMLTextExtractor()
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title.feed(search_result.get('t'))
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content = HTMLTextExtractor()
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content.feed(search_result.get('a'))
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a_tag = eval_xpath_getindex(tr_title, './/td//a[@class="result-link"]', 0, None)
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if a_tag is None:
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continue
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td_content = eval_xpath_getindex(tr_content, './/td[@class="result-snippet"]', 0, None)
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if td_content is None:
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continue
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results.append({
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'title': a_tag.text_content(),
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'content': extract_text(td_content),
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'url': a_tag.get('href'),
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})
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results.append({'title': title.get_text(),
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'content': content.get_text(),
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'url': search_result.get('u')})
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return results
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