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"""
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DuckDuckGo (Images)
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@website https://duckduckgo.com/
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@provide-api yes (https://duckduckgo.com/api),
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but images are not supported
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@using-api no
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@results JSON (site requires js to get images)
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@stable no (JSON can change)
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@parse url, title, img_src
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@todo avoid extra request
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"""
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from json import loads
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from urllib.parse import urlencode
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from searx.exceptions import SearxEngineAPIException
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from searx.engines.duckduckgo import get_region_code
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from searx.engines.duckduckgo import _fetch_supported_languages, supported_languages_url # NOQA # pylint: disable=unused-import
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from searx.poolrequests import get
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# engine dependent config
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categories = ['images']
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paging = True
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language_support = True
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safesearch = True
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# search-url
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images_url = 'https://duckduckgo.com/i.js?{query}&s={offset}&p={safesearch}&o=json&vqd={vqd}'
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site_url = 'https://duckduckgo.com/?{query}&iar=images&iax=1&ia=images'
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# run query in site to get vqd number needed for requesting images
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# TODO: find a way to get this number without an extra request (is it a hash of the query?)
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def get_vqd(query, headers):
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query_url = site_url.format(query=urlencode({'q': query}))
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res = get(query_url, headers=headers)
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content = res.text
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if content.find('vqd=\'') == -1:
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raise SearxEngineAPIException('Request failed')
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vqd = content[content.find('vqd=\'') + 5:]
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vqd = vqd[:vqd.find('\'')]
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return vqd
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# do search-request
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def request(query, params):
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# to avoid running actual external requests when testing
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if 'is_test' not in params:
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vqd = get_vqd(query, params['headers'])
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else:
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vqd = '12345'
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offset = (params['pageno'] - 1) * 50
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safesearch = params['safesearch'] - 1
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region_code = get_region_code(params['language'], lang_list=supported_languages)
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if region_code:
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params['url'] = images_url.format(
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query=urlencode({'q': query, 'l': region_code}), offset=offset, safesearch=safesearch, vqd=vqd)
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else:
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params['url'] = images_url.format(
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query=urlencode({'q': query}), offset=offset, safesearch=safesearch, vqd=vqd)
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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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content = resp.text
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res_json = loads(content)
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# parse results
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for result in res_json['results']:
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title = result['title']
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url = result['url']
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thumbnail = result['thumbnail']
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image = result['image']
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# append result
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results.append({'template': 'images.html',
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'title': title,
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'content': '',
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'thumbnail_src': thumbnail,
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'img_src': image,
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'url': url})
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return results
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