mirror of
https://github.com/searxng/searxng.git
synced 2024-11-23 04:27:46 +01:00
139 lines
4.0 KiB
Python
139 lines
4.0 KiB
Python
"""
|
|
Wikipedia (Web)
|
|
|
|
@website https://{language}.wikipedia.org
|
|
@provide-api yes
|
|
|
|
@using-api yes
|
|
@results JSON
|
|
@stable yes
|
|
@parse url, infobox
|
|
"""
|
|
|
|
from json import loads
|
|
from lxml.html import fromstring
|
|
from searx.url_utils import quote, urlencode
|
|
from searx.utils import match_language
|
|
|
|
# search-url
|
|
base_url = u'https://{language}.wikipedia.org/'
|
|
search_url = base_url + u'w/api.php?'\
|
|
'action=query'\
|
|
'&format=json'\
|
|
'&{query}'\
|
|
'&prop=extracts|pageimages|pageprops'\
|
|
'&ppprop=disambiguation'\
|
|
'&exintro'\
|
|
'&explaintext'\
|
|
'&pithumbsize=300'\
|
|
'&redirects'
|
|
supported_languages_url = 'https://meta.wikimedia.org/wiki/List_of_Wikipedias'
|
|
|
|
|
|
# set language in base_url
|
|
def url_lang(lang):
|
|
lang_pre = lang.split('-')[0]
|
|
if lang_pre == 'all' or lang_pre not in supported_languages and lang_pre not in language_aliases:
|
|
return 'en'
|
|
return match_language(lang, supported_languages, language_aliases).split('-')[0]
|
|
|
|
|
|
# do search-request
|
|
def request(query, params):
|
|
if query.islower():
|
|
query = u'{0}|{1}'.format(query.decode('utf-8'), query.decode('utf-8').title()).encode('utf-8')
|
|
|
|
params['url'] = search_url.format(query=urlencode({'titles': query}),
|
|
language=url_lang(params['language']))
|
|
|
|
return params
|
|
|
|
|
|
# get first meaningful paragraph
|
|
# this should filter out disambiguation pages and notes above first paragraph
|
|
# "magic numbers" were obtained by fine tuning
|
|
def extract_first_paragraph(content, title, image):
|
|
first_paragraph = None
|
|
|
|
failed_attempts = 0
|
|
for paragraph in content.split('\n'):
|
|
|
|
starts_with_title = paragraph.lower().find(title.lower(), 0, len(title) + 35)
|
|
length = len(paragraph)
|
|
|
|
if length >= 200 or (starts_with_title >= 0 and (image or length >= 150)):
|
|
first_paragraph = paragraph
|
|
break
|
|
|
|
failed_attempts += 1
|
|
if failed_attempts > 3:
|
|
return None
|
|
|
|
return first_paragraph
|
|
|
|
|
|
# get response from search-request
|
|
def response(resp):
|
|
results = []
|
|
|
|
search_result = loads(resp.text)
|
|
|
|
# wikipedia article's unique id
|
|
# first valid id is assumed to be the requested article
|
|
if 'pages' not in search_result['query']:
|
|
return results
|
|
|
|
for article_id in search_result['query']['pages']:
|
|
page = search_result['query']['pages'][article_id]
|
|
if int(article_id) > 0:
|
|
break
|
|
|
|
if int(article_id) < 0 or 'disambiguation' in page.get('pageprops', {}):
|
|
return []
|
|
|
|
title = page.get('title')
|
|
|
|
image = page.get('thumbnail')
|
|
if image:
|
|
image = image.get('source')
|
|
|
|
extract = page.get('extract')
|
|
|
|
summary = extract_first_paragraph(extract, title, image)
|
|
summary = summary.replace('() ', '')
|
|
|
|
# link to wikipedia article
|
|
wikipedia_link = base_url.format(language=url_lang(resp.search_params['language'])) \
|
|
+ 'wiki/' + quote(title.replace(' ', '_').encode('utf8'))
|
|
|
|
results.append({'url': wikipedia_link, 'title': title})
|
|
|
|
results.append({'infobox': title,
|
|
'id': wikipedia_link,
|
|
'content': summary,
|
|
'img_src': image,
|
|
'urls': [{'title': 'Wikipedia', 'url': wikipedia_link}]})
|
|
|
|
return results
|
|
|
|
|
|
# get supported languages from their site
|
|
def _fetch_supported_languages(resp):
|
|
supported_languages = {}
|
|
dom = fromstring(resp.text)
|
|
tables = dom.xpath('//table[contains(@class,"sortable")]')
|
|
for table in tables:
|
|
# exclude header row
|
|
trs = table.xpath('.//tr')[1:]
|
|
for tr in trs:
|
|
td = tr.xpath('./td')
|
|
code = td[3].xpath('./a')[0].text
|
|
name = td[2].xpath('./a')[0].text
|
|
english_name = td[1].xpath('./a')[0].text
|
|
articles = int(td[4].xpath('./a/b')[0].text.replace(',', ''))
|
|
# exclude languages with too few articles
|
|
if articles >= 100:
|
|
supported_languages[code] = {"name": name, "english_name": english_name, "articles": articles}
|
|
|
|
return supported_languages
|