mirror of https://github.com/searxng/searxng.git
Add baidu engine (experimental)
This commit is contained in:
Alexandre Flament
parent
a983db0229
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# SPDX-License-Identifier: AGPL-3.0-or-later
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"""Bing (Web)
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- https://github.com/searx/searx/issues/2019#issuecomment-648227442
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"""
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import re
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from urllib.parse import urlencode
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from lxml import html
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from searx.utils import eval_xpath, extract_text, eval_xpath_list, eval_xpath_getindex
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from searx.network import raise_for_httperror, multi_requests, get, Request
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from searx.exceptions import SearxEngineCaptchaException
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about = {
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"website": 'https://www.baidu.com',
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"wikidata_id": 'Q14772',
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"official_api_documentation": 'https://apis.baidu.com/',
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"use_official_api": False,
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"require_api_key": False,
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"results": 'HTML',
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"language": 'zn',
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}
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# engine dependent config
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categories = ['general', 'web']
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paging = False
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time_range_support = False
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safesearch = False
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base_url = 'https://www.baidu.com/'
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search_string = 's?{query}'
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skip_tpls = ('img_normal', 'short_video', 'yl_music_song', 'dict3', 'recommend_list')
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desc_xpath_per_tpl = {
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'se_com_default': './/span[contains(@class, "content-right_8Zs40")]',
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'kaifa_pc_open_source_software': './/p[contains(@class, "c-color-text")]',
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'bk_polysemy': './/div/@aria-label',
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'se_st_single_video_zhanzhang': './/span[contains(@class, "c-span-last")]//p[2]',
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}
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def get_initial_parameters(params):
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resp_index = get(base_url, headers=params['headers'], raise_for_httperror=True)
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dom = html.fromstring(resp_index.text)
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query_params = {}
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for ielement in eval_xpath_list(dom, '//form[@id="form"]//input[@name]'):
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name = ielement.attrib.get('name')
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value = ielement.attrib.get('value')
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query_params[name] = value
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return query_params, resp_index.cookies
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def request(query, params):
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params['headers'].update(
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{
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'Accept-Language': 'en-US,en;q=0.5',
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'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
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'Sec-Fetch-Dest': 'document',
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'Sec-Fetch-Mode': 'navigate',
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'Sec-Fetch-Site': 'same-origin',
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'Sec-Fetch-User': '?1',
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'Sec-GPC': '1',
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'Upgrade-Insecure-Requests': '1',
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'TE': 'trailers',
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}
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)
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query_params, cookies = get_initial_parameters(params)
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query_params['wd'] = query
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params['url'] = base_url + search_string.format(query=urlencode(query_params))
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params['cookies'] = cookies
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params['raise_for_httperror'] = False
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return params
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def response(resp):
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results = []
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if resp.url.host == 'wappass.baidu.com' or resp.url.path.startswith('/static/captcha'):
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raise SearxEngineCaptchaException()
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raise_for_httperror(resp)
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dom = html.fromstring(resp.text)
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# follow redirect but don't use the result page to reduce the CAPTCHA issue
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redirect_element = eval_xpath_getindex(dom, '//noscript/meta[@http-equiv="refresh"]/@content', 0, default=None)
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if redirect_element and redirect_element.startswith('0; url='):
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get(
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base_url + redirect_element[8:],
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headers=resp.search_params['headers'],
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cookies=resp.search_params['cookies'],
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)
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for result in eval_xpath_list(dom, '//div[contains(@id,"content_left")]/div[contains(@class, "c-container")]'):
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tpl = result.attrib.get('tpl')
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if tpl in skip_tpls:
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continue
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if tpl == 'kaifa_pc_blog_weak':
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# skip the result to kaifa.baidu.com (search engine for IT)
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# but includes results from kaifa
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for r2 in eval_xpath_list(result, './/div[contains(@class, "c-gap-bottom-small")]'):
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title = extract_text(eval_xpath(r2, './/div[@class="c-row"]//a'))
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url = extract_text(eval_xpath(r2, './/div[@class="c-row"]//a/@href'))
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content = extract_text(eval_xpath(r2, '//span[@class="c-line-clamp2"]'))
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results.append(
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{
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'url': url,
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'title': title,
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'content': content,
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}
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)
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continue
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# normal results
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title = extract_text(eval_xpath(result, './/h3/a'))
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url = extract_text(eval_xpath(result, './/h3/a/@href'))
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if not title or not url:
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continue
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content = None
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if tpl in desc_xpath_per_tpl:
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# try the XPath for the Baidu template
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content = extract_text(eval_xpath(result, desc_xpath_per_tpl[tpl]))
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if not content:
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# no content was found: try all the XPath from the Baidu templates
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for xp in desc_xpath_per_tpl.values():
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content = extract_text(eval_xpath(result, xp))
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if content:
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break
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results.append(
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{
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'url': url,
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'title': title,
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'content': content,
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}
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)
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# resolve the Baidu redirections
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# note: Baidu does not support HTTP/2
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request_list = [
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Request.get(
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u['url'].replace('http://www.baidu.com/link?url=', 'https://www.baidu.com/link?url='),
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allow_redirects=False,
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headers=resp.search_params['headers'],
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)
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for u in results
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]
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response_list = multi_requests(request_list)
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for i, redirect_response in enumerate(response_list):
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if not isinstance(redirect_response, Exception):
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results[i]['url'] = redirect_response.headers['location']
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return results
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def debug_write_content_to_file(text):
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RE_STYLE_ELEMENT = re.compile(r'<style[^>]*>[^<]+</style>')
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RE_SCRIPT_ELEMENT = re.compile(r'<script[^>]*>[^<]+</script>')
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RE_COMMENT_ELEMENT = re.compile(r'\<\!\-\-[^-]+\-\-\>')
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with open('baidu.html', 'wt', encoding='utf-8') as f:
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text = RE_STYLE_ELEMENT.sub("", text)
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text = RE_SCRIPT_ELEMENT.sub("", text)
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text = RE_COMMENT_ELEMENT.sub("", text)
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text = "\n".join([ll.rstrip() for ll in text.splitlines() if ll.strip()])
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f.write(text)
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@ -329,6 +329,12 @@ engines:
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shortcut: bi
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disabled: true
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- name: baidu
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engine: baidu
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shortcut: ba
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timeout: 15
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disabled: true
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- name: bing images
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engine: bing_images
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shortcut: bii
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