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