forked from zaclys/searxng
67 lines
1.6 KiB
Python
67 lines
1.6 KiB
Python
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# WolframAlpha (Maths)
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#
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# @website http://www.wolframalpha.com/
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#
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# @using-api no
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# @results HTML, JS
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# @stable no
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# @parse answer
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import re
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import json
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from urllib import urlencode
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from lxml import html
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from searx.engines.xpath import extract_text
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# search-url
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url = 'http://www.wolframalpha.com/'
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search_url = url+'input/?{query}'
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# do search-request
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def request(query, params):
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params['url'] = search_url.format(query=urlencode({'i': query}))
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return params
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# tries to find answer under the pattern given
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def extract_answer(script_list, pattern):
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answer = None
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# get line that matches the pattern
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for script in script_list:
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try:
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line = re.search(pattern, script.text_content()).group(1)
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except AttributeError:
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continue
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# extract answer from json
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answer = line[line.find('{') : line.rfind('}')+1]
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answer = json.loads(answer.encode('unicode-escape'))
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answer = answer['stringified'].decode('unicode-escape')
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return answer
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# get response from search-request
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def response(resp):
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dom = html.fromstring(resp.text)
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# the answer is inside a js script
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scripts = dom.xpath('//script')
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results = []
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# answer can be located in different 'pods', although by default it should be in pod_0200
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answer = extract_answer(scripts, 'pod_0200\.push(.*)\n')
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if not answer:
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answer = extract_answer(scripts, 'pod_0100\.push(.*)\n')
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if answer:
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results.append({'answer': answer})
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else:
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results.append({'answer': answer})
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return results
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