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searxng/searx/engines/duckduckgo_definitions.py

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"""
DuckDuckGo (definitions)
- `Instant Answer API`_
- `DuckDuckGo query`_
.. _Instant Answer API: https://duckduckgo.com/api
.. _DuckDuckGo query: https://api.duckduckgo.com/?q=DuckDuckGo&format=json&pretty=1
"""
import json
from urllib.parse import urlencode
from lxml import html
from searx import logger
from searx.data import WIKIDATA_UNITS
from searx.engines.duckduckgo import language_aliases
from searx.engines.duckduckgo import _fetch_supported_languages, supported_languages_url # NOQA
from searx.utils import extract_text, html_to_text, match_language, get_string_replaces_function
from searx.external_urls import get_external_url, get_earth_coordinates_url, area_to_osm_zoom
logger = logger.getChild('duckduckgo_definitions')
URL = 'https://api.duckduckgo.com/'\
+ '?{query}&format=json&pretty=0&no_redirect=1&d=1'
WIKIDATA_PREFIX = [
'http://www.wikidata.org/entity/',
'https://www.wikidata.org/entity/'
]
replace_http_by_https = get_string_replaces_function({'http:': 'https:'})
def is_broken_text(text):
""" duckduckgo may return something like "<a href="xxxx">http://somewhere Related website<a/>"
The href URL is broken, the "Related website" may contains some HTML.
The best solution seems to ignore these results.
"""
return text.startswith('http') and ' ' in text
def result_to_text(text, htmlResult):
# TODO : remove result ending with "Meaning" or "Category"
result = None
dom = html.fromstring(htmlResult)
a = dom.xpath('//a')
if len(a) >= 1:
result = extract_text(a[0])
else:
result = text
if not is_broken_text(result):
return result
return None
def request(query, params):
params['url'] = URL.format(query=urlencode({'q': query}))
language = match_language(params['language'], supported_languages, language_aliases)
language = language.split('-')[0]
params['headers']['Accept-Language'] = language
return params
def response(resp):
results = []
search_res = json.loads(resp.text)
# search_res.get('Entity') possible values (not exhaustive) :
# * continent / country / department / location / waterfall
# * actor / musician / artist
# * book / performing art / film / television / media franchise / concert tour / playwright
# * prepared food
# * website / software / os / programming language / file format / software engineer
# * compagny
content = ''
heading = search_res.get('Heading', '')
attributes = []
urls = []
infobox_id = None
relatedTopics = []
# add answer if there is one
answer = search_res.get('Answer', '')
if answer:
logger.debug('AnswerType="%s" Answer="%s"', search_res.get('AnswerType'), answer)
if search_res.get('AnswerType') not in ['calc', 'ip']:
results.append({'answer': html_to_text(answer)})
# add infobox
if 'Definition' in search_res:
content = content + search_res.get('Definition', '')
if 'Abstract' in search_res:
content = content + search_res.get('Abstract', '')
# image
image = search_res.get('Image')
image = None if image == '' else image
# urls
# Official website, Wikipedia page
for ddg_result in search_res.get('Results', []):
firstURL = ddg_result.get('FirstURL')
text = ddg_result.get('Text')
if firstURL is not None and text is not None:
urls.append({'title': text, 'url': firstURL})
results.append({'title': heading, 'url': firstURL})
# related topics
for ddg_result in search_res.get('RelatedTopics', []):
if 'FirstURL' in ddg_result:
firstURL = ddg_result.get('FirstURL')
text = ddg_result.get('Text')
if not is_broken_text(text):
suggestion = result_to_text(text,
ddg_result.get('Result'))
if suggestion != heading and suggestion is not None:
results.append({'suggestion': suggestion})
elif 'Topics' in ddg_result:
suggestions = []
relatedTopics.append({'name': ddg_result.get('Name', ''),
'suggestions': suggestions})
for topic_result in ddg_result.get('Topics', []):
suggestion = result_to_text(topic_result.get('Text'),
topic_result.get('Result'))
if suggestion != heading and suggestion is not None:
suggestions.append(suggestion)
# abstract
abstractURL = search_res.get('AbstractURL', '')
if abstractURL != '':
# add as result ? problem always in english
infobox_id = abstractURL
urls.append({'title': search_res.get('AbstractSource'),
'url': abstractURL,
'official': True})
results.append({'url': abstractURL,
'title': heading})
# definition
definitionURL = search_res.get('DefinitionURL', '')
if definitionURL != '':
# add as result ? as answer ? problem always in english
infobox_id = definitionURL
urls.append({'title': search_res.get('DefinitionSource'),
'url': definitionURL})
# to merge with wikidata's infobox
if infobox_id:
infobox_id = replace_http_by_https(infobox_id)
# attributes
# some will be converted to urls
if 'Infobox' in search_res:
infobox = search_res.get('Infobox')
if 'content' in infobox:
osm_zoom = 17
coordinates = None
for info in infobox.get('content'):
data_type = info.get('data_type')
data_label = info.get('label')
data_value = info.get('value')
# Workaround: ddg may return a double quote
if data_value == '""':
continue
# Is it an external URL ?
# * imdb_id / facebook_profile / youtube_channel / youtube_video / twitter_profile
# * instagram_profile / rotten_tomatoes / spotify_artist_id / itunes_artist_id / soundcloud_id
# * netflix_id
external_url = get_external_url(data_type, data_value)
if external_url is not None:
urls.append({'title': data_label,
'url': external_url})
elif data_type in ['instance', 'wiki_maps_trigger', 'google_play_artist_id']:
# ignore instance: Wikidata value from "Instance Of" (Qxxxx)
# ignore wiki_maps_trigger: reference to a javascript
# ignore google_play_artist_id: service shutdown
pass
elif data_type == 'string' and data_label == 'Website':
# There is already an URL for the website
pass
elif data_type == 'area':
attributes.append({'label': data_label,
'value': area_to_str(data_value),
'entity': 'P2046'})
osm_zoom = area_to_osm_zoom(data_value.get('amount'))
elif data_type == 'coordinates':
if data_value.get('globe') == 'http://www.wikidata.org/entity/Q2':
# coordinate on Earth
# get the zoom information from the area
coordinates = info
else:
# coordinate NOT on Earth
attributes.append({'label': data_label,
'value': data_value,
'entity': 'P625'})
elif data_type == 'string':
attributes.append({'label': data_label,
'value': data_value})
if coordinates:
data_label = coordinates.get('label')
data_value = coordinates.get('value')
latitude = data_value.get('latitude')
longitude = data_value.get('longitude')
url = get_earth_coordinates_url(latitude, longitude, osm_zoom)
urls.append({'title': 'OpenStreetMap',
'url': url,
'entity': 'P625'})
if len(heading) > 0:
# TODO get infobox.meta.value where .label='article_title'
if image is None and len(attributes) == 0 and len(urls) == 1 and\
len(relatedTopics) == 0 and len(content) == 0:
results.append({'url': urls[0]['url'],
'title': heading,
'content': content})
else:
results.append({'infobox': heading,
'id': infobox_id,
'content': content,
'img_src': image,
'attributes': attributes,
'urls': urls,
'relatedTopics': relatedTopics})
return results
def unit_to_str(unit):
for prefix in WIKIDATA_PREFIX:
if unit.startswith(prefix):
wikidata_entity = unit[len(prefix):]
return WIKIDATA_UNITS.get(wikidata_entity, unit)
return unit
def area_to_str(area):
"""parse {'unit': 'http://www.wikidata.org/entity/Q712226', 'amount': '+20.99'}"""
unit = unit_to_str(area.get('unit'))
if unit is not None:
try:
amount = float(area.get('amount'))
return '{} {}'.format(amount, unit)
except ValueError:
pass
return '{} {}'.format(area.get('amount', ''), area.get('unit', ''))
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