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"""
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DuckDuckGo (Web)
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@website https://duckduckgo.com/
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@provide-api yes (https://duckduckgo.com/api),
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but not all results from search-site
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@using-api no
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@results HTML (using search portal)
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@stable no (HTML can change)
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@parse url, title, content
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@todo rewrite to api
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@todo language support
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(the current used site does not support language-change)
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"""
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from urllib import urlencode
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from lxml.html import fromstring
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from searx.engines.xpath import extract_text
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# engine dependent config
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categories = ['general']
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paging = True
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language_support = True
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# search-url
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url = 'https://duckduckgo.com/html?{query}&s={offset}'
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# specific xpath variables
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result_xpath = '//div[@class="results_links results_links_deep web-result"]' # noqa
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url_xpath = './/a[@class="large"]/@href'
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title_xpath = './/a[@class="large"]'
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content_xpath = './/div[@class="snippet"]'
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# do search-request
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def request(query, params):
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offset = (params['pageno'] - 1) * 30
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if params['language'] == 'all':
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locale = 'en-us'
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else:
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locale = params['language'].replace('_', '-').lower()
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params['url'] = url.format(
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query=urlencode({'q': query, 'kl': locale}),
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offset=offset)
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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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results = []
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doc = fromstring(resp.text)
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# parse results
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for r in doc.xpath(result_xpath):
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try:
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res_url = r.xpath(url_xpath)[-1]
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except:
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continue
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if not res_url:
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continue
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title = extract_text(r.xpath(title_xpath))
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content = extract_text(r.xpath(content_xpath))
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# append result
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results.append({'title': title,
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'content': content,
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'url': res_url})
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# return results
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return results
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