searxng/searx/engines/mediawiki.py

## Wikipedia (Web)
# 
# @website     http://www.wikipedia.org
# @provide-api yes (http://www.mediawiki.org/wiki/API:Search)
# 
# @using-api   yes
# @results     JSON
# @stable      yes
# @parse       url, title 
#
# @todo        content

from json import loads
from urllib import urlencode, quote

# engine dependent config
categories = ['general']
language_support = True
paging = True
number_of_results = 1
    
# search-url
base_url = 'https://{language}.wikipedia.org/'
search_url = base_url + 'w/api.php?action=query&list=search&{query}&srprop=timestamp&format=json&sroffset={offset}&srlimit={limit}'  # noqa


# do search-request
def request(query, params):
    offset = (params['pageno'] - 1) * number_of_results

    if params['language'] == 'all':
        language = 'en'
    else:
        language = params['language'].split('_')[0]
    
    # write search-language back to params, required in response
    params['language'] = language

    params['url'] = search_url.format(query=urlencode({'srsearch': query}),
                                      offset=offset,
                                      limit=number_of_results,
                                      language=language)

    return params


# get response from search-request
def response(resp):
    results = []

    search_results = loads(resp.text)

    # return empty array if there are no results
    if not search_results.get('query', {}).get('search'):
        return []

    # parse results
    for result in search_results['query']['search']:
        url = base_url.format(language=resp.search_params['language']) + 'wiki/' + quote(result['title'].replace(' ', '_').encode('utf-8'))
        
        # append result
        results.append({'url': url,
                        'title': result['title'],
                        'content': ''})

    # return results
    return results