mirror of https://github.com/searx/searx
169 lines
4.7 KiB
Python
169 lines
4.7 KiB
Python
# Wolfram|Alpha (Science)
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#
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# @website https://www.wolframalpha.com/
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# @provide-api yes (https://api.wolframalpha.com/v2/)
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#
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# @using-api no
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# @results JSON
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# @stable no
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# @parse url, infobox
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from cgi import escape
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from json import loads
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from time import time
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from urllib import urlencode
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from lxml.etree import XML
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from searx.poolrequests import get as http_get
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# search-url
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url = 'https://www.wolframalpha.com/'
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search_url = url + 'input/json.jsp'\
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'?async=true'\
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'&banners=raw'\
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'&debuggingdata=false'\
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'&format=image,plaintext,imagemap,minput,moutput'\
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'&formattimeout=2'\
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'&{query}'\
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'&output=JSON'\
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'&parsetimeout=2'\
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'&proxycode={token}'\
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'&scantimeout=0.5'\
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'&sponsorcategories=true'\
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'&statemethod=deploybutton'
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referer_url = url + 'input/?{query}'
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token = {'value': '',
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'last_updated': None}
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# xpath variables
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success_xpath = '/pod[attribute::error="false"]'
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plaintext_xpath = './plaintext'
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title_xpath = './@title'
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image_xpath = './img'
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img_src_xpath = './img/@src'
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img_alt_xpath = './img/@alt'
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# pods to display as image in infobox
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# this pods do return a plaintext, but they look better and are more useful as images
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image_pods = {'VisualRepresentation',
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'Illustration',
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'Symbol'}
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# seems, wolframalpha resets its token in every hour
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def obtain_token():
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update_time = time() - (time() % 3600)
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try:
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token_response = http_get('https://www.wolframalpha.com/input/api/v1/code?ts=9999999999999999999', timeout=2.0)
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token['value'] = loads(token_response.text)['code']
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token['last_updated'] = update_time
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except:
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pass
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return token
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obtain_token()
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# do search-request
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def request(query, params):
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# obtain token if last update was more than an hour
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if time() - token['last_updated'] > 3600:
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obtain_token()
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params['url'] = search_url.format(query=urlencode({'input': query}), token=token['value'])
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params['headers']['Referer'] = referer_url.format(query=urlencode({'i': query}))
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return params
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# get additional pod
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# NOTE: this makes an additional requests to server, so the response will take longer and might reach timeout
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def get_async_pod(url):
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try:
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resp = http_get(url, timeout=2.0)
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except:
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return None
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if resp:
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return parse_async_pod(resp)
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def parse_async_pod(resp):
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pod = {'subpods': []}
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resp_pod = XML(resp.content)
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if resp_pod.xpath(success_xpath):
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for subpod in resp_pod:
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new_subpod = {'title': subpod.xpath(title_xpath)[0]}
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plaintext = subpod.xpath(plaintext_xpath)[0].text
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if plaintext:
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new_subpod['plaintext'] = plaintext
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else:
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new_subpod['plaintext'] = ''
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if subpod.xpath(image_xpath):
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new_subpod['img'] = {'src': subpod.xpath(img_src_xpath)[0],
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'alt': subpod.xpath(img_alt_xpath)[0]}
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pod['subpods'].append(new_subpod)
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return pod
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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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resp_json = loads(resp.text)
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if not resp_json['queryresult']['success']:
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return []
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# TODO handle resp_json['queryresult']['assumptions']
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result_chunks = []
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infobox_title = None
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for pod in resp_json['queryresult']['pods']:
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pod_id = pod.get('id', '')
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pod_title = pod.get('title', '')
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if 'subpods' not in pod:
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# comment this section if your requests always reach timeout
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if pod['async']:
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result = get_async_pod(pod['async'])
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if result:
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pod = result
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else:
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continue
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else:
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continue
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if pod_id == 'Input' or not infobox_title:
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infobox_title = pod['subpods'][0]['plaintext']
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for subpod in pod['subpods']:
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if subpod['plaintext'] != '' and pod_id not in image_pods:
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# append unless it's not an actual answer
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if subpod['plaintext'] != '(requires interactivity)':
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result_chunks.append({'label': pod_title, 'value': subpod['plaintext']})
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elif 'img' in subpod:
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result_chunks.append({'label': pod_title, 'image': subpod['img']})
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if not result_chunks:
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return []
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results.append({'infobox': infobox_title,
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'attributes': result_chunks,
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'urls': [{'title': 'Wolfram|Alpha', 'url': resp.request.headers['Referer']}]})
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results.append({'url': resp.request.headers['Referer'],
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'title': 'Wolfram|Alpha',
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'content': infobox_title})
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return results
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