Adam Tauber
parent
4e5af8d87b
commit
d06178139f
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@ -8,79 +8,85 @@
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# @stable no
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# @parse answer
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from re import search, sub
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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 import html
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import HTMLParser
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from searx.poolrequests import get as http_get
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# search-url
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url = 'http://www.wolframalpha.com/'
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url = 'https://www.wolframalpha.com/'
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search_url = url + 'input/?{query}'
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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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# xpath variables
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scripts_xpath = '//script'
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title_xpath = '//title'
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failure_xpath = '//p[attribute::class="pfail"]'
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token = {'value': '',
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'last_updated': None}
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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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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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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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params['url'] = search_url.format(query=urlencode({'i': query}))
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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'] = 'https://www.wolframalpha.com/input/?i=' + query
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return params
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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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line = None
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resp_json = loads(resp.text)
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dom = html.fromstring(resp.text)
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scripts = dom.xpath(scripts_xpath)
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if not resp_json['queryresult']['success']:
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return []
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# the answer is inside a js function
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# answer can be located in different 'pods', although by default it should be in pod_0200
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possible_locations = ['pod_0200\.push\((.*)',
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'pod_0100\.push\((.*)']
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# TODO handle resp_json['queryresult']['assumptions']
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result_chunks = []
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for pod in resp_json['queryresult']['pods']:
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pod_title = pod.get('title', '')
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if 'subpods' not in pod:
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continue
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for subpod in pod['subpods']:
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if 'img' in subpod:
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result_chunks.append(u'<p>{0}<br /><img src="{1}" alt="{2}" /></p>'
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.format(escape(pod_title or subpod['img']['alt']),
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escape(subpod['img']['src']),
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escape(subpod['img']['alt'])))
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# failed result
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if dom.xpath(failure_xpath):
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return results
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if not result_chunks:
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return []
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# get line that matches the pattern
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for pattern in possible_locations:
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for script in scripts:
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try:
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line = search(pattern, script.text_content()).group(1)
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break
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except AttributeError:
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continue
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if line:
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break
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if line:
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# extract answer from json
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answer = line[line.find('{'):line.rfind('}') + 1]
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try:
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answer = loads(answer)
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except Exception:
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answer = loads(answer.encode('unicode-escape'))
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answer = answer['stringified']
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# clean plaintext answer
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h = HTMLParser.HTMLParser()
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answer = h.unescape(answer.decode('unicode-escape'))
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answer = sub(r'\\', '', answer)
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results.append({'answer': answer})
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# user input is in first part of title
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title = dom.xpath(title_xpath)[0].text.encode('utf-8')
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result_url = request(title[:-16], {})['url']
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# append result
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results.append({'url': result_url,
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'title': title.decode('utf-8')})
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return results
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return [{'url': resp.request.headers['Referer'],
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'title': 'Wolframalpha',
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'content': ''.join(result_chunks)}]
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@ -1,6 +1,5 @@
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# -*- coding: utf-8 -*-
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from collections import defaultdict
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import mock
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from searx.engines import wolframalpha_noapi
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from searx.testing import SearxTestCase
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@ -21,173 +20,4 @@ class TestWolframAlphaNoAPIEngine(SearxTestCase):
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self.assertRaises(AttributeError, wolframalpha_noapi.response, [])
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self.assertRaises(AttributeError, wolframalpha_noapi.response, '')
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self.assertRaises(AttributeError, wolframalpha_noapi.response, '[]')
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html = """
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<!DOCTYPE html>
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<title> Parangaricutirimícuaro - Wolfram|Alpha</title>
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<meta charset="utf-8" />
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<body>
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<div id="closest">
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<p class="pfail">Wolfram|Alpha doesn't know how to interpret your input.</p>
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<div id="dtips">
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<div class="tip">
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<span class="tip-title">Tip: </span>
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Check your spelling, and use English
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<span class="tip-extra"></span>
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</div>
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</div>
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</div>
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</body>
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</html>
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"""
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# test failed query
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response = mock.Mock(text=html)
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self.assertEqual(wolframalpha_noapi.response(response), [])
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html = """
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<!DOCTYPE html>
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<title> sqrt(-1) - Wolfram|Alpha</title>
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<meta charset="utf-8" />
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<body>
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<script type="text/javascript">
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try {
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if (typeof context.jsonArray.popups.pod_0100 == "undefined" ) {
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context.jsonArray.popups.pod_0100 = [];
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}
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context.jsonArray.popups.pod_0100.push( {"stringified": "sqrt(-1)","mInput": "","mOutput": ""});
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} catch(e) { }
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try {
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if (typeof context.jsonArray.popups.pod_0200 == "undefined" ) {
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context.jsonArray.popups.pod_0200 = [];
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}
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context.jsonArray.popups.pod_0200.push( {"stringified": "i","mInput": "","mOutput": ""});
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} catch(e) { }
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</script>
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</body>
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</html>
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"""
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# test plaintext
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response = mock.Mock(text=html)
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results = wolframalpha_noapi.response(response)
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self.assertEqual(type(results), list)
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self.assertEqual(len(results), 2)
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self.assertEquals('i', results[0]['answer'])
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self.assertIn('sqrt(-1) - Wolfram|Alpha', results[1]['title'])
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self.assertEquals('http://www.wolframalpha.com/input/?i=+sqrt%28-1%29', results[1]['url'])
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html = """
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<!DOCTYPE html>
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<title> integral 1/x - Wolfram|Alpha</title>
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<meta charset="utf-8" />
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<body>
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<script type="text/javascript">
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try {
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if (typeof context.jsonArray.popups.pod_0100 == "undefined" ) {
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context.jsonArray.popups.pod_0100 = [];
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}
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context.jsonArray.popups.pod_0100.push( {"stringified": "integral 1\/x dx = log(x)+constant"});
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} catch(e) { }
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</script>
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</body>
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</html>
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"""
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# test integral
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response = mock.Mock(text=html)
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results = wolframalpha_noapi.response(response)
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self.assertEqual(type(results), list)
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self.assertEqual(len(results), 2)
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self.assertIn('log(x)+c', results[0]['answer'])
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self.assertIn('integral 1/x - Wolfram|Alpha', results[1]['title'])
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self.assertEquals('http://www.wolframalpha.com/input/?i=+integral+1%2Fx', results[1]['url'])
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html = """
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<!DOCTYPE html>
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<title> ∫1/x x - Wolfram|Alpha</title>
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<meta charset="utf-8" />
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<body>
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<script type="text/javascript">
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try {
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if (typeof context.jsonArray.popups.pod_0100 == "undefined" ) {
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context.jsonArray.popups.pod_0100 = [];
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}
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context.jsonArray.popups.pod_0100.push( {"stringified": "integral 1\/x dx = log(x)+constant"});
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} catch(e) { }
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</script>
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</body>
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</html>
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"""
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# test input in mathematical notation
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response = mock.Mock(text=html)
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results = wolframalpha_noapi.response(response)
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self.assertEqual(type(results), list)
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self.assertEqual(len(results), 2)
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self.assertIn('log(x)+c', results[0]['answer'])
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self.assertIn('∫1/x x - Wolfram|Alpha'.decode('utf-8'), results[1]['title'])
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self.assertEquals('http://www.wolframalpha.com/input/?i=+%E2%88%AB1%2Fx+%EF%9D%8Cx', results[1]['url'])
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html = """
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<!DOCTYPE html>
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<title> 1 euro to yen - Wolfram|Alpha</title>
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<meta charset="utf-8" />
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<body>
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<script type="text/javascript">
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try {
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if (typeof context.jsonArray.popups.pod_0100 == "undefined" ) {
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context.jsonArray.popups.pod_0100 = [];
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}
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context.jsonArray.popups.pod_0100.push( {"stringified": "convert euro1 (euro) to Japanese yen"});
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} catch(e) { }
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try {
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if (typeof context.jsonArray.popups.pod_0200 == "undefined" ) {
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context.jsonArray.popups.pod_0200 = [];
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}
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context.jsonArray.popups.pod_0200.push( {"stringified": "¥130.5 (Japanese yen)"});
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} catch(e) { }
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</script>
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</body>
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</html>
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"""
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# test output with htmlentity
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response = mock.Mock(text=html)
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results = wolframalpha_noapi.response(response)
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self.assertEqual(type(results), list)
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self.assertEqual(len(results), 2)
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self.assertIn('¥'.decode('utf-8'), results[0]['answer'])
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self.assertIn('1 euro to yen - Wolfram|Alpha', results[1]['title'])
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self.assertEquals('http://www.wolframalpha.com/input/?i=+1+euro+to+yen', results[1]['url'])
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html = """
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<!DOCTYPE html>
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<title> distance from nairobi to kyoto in inches - Wolfram|Alpha</title>
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<meta charset="utf-8" />
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<body>
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<script type="text/javascript">
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try {
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if (typeof context.jsonArray.popups.pod_0100 == "undefined" ) {
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context.jsonArray.popups.pod_0100 = [];
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}
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[...].pod_0100.push( {"stringified": "convert distance | from | Nairobi, Kenya\nto | Kyoto, Japan to inches"});
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} catch(e) { }
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try {
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if (typeof context.jsonArray.popups.pod_0200 == "undefined" ) {
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context.jsonArray.popups.pod_0200 = [];
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}
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pod_0200.push({"stringified": "4.295×10^8 inches","mOutput": "Quantity[4.295×10^8,&quot;Inches&quot;]"});
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} catch(e) { }
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</script>
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</body>
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</html>
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"""
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# test output with utf-8 character
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response = mock.Mock(text=html)
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results = wolframalpha_noapi.response(response)
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self.assertEqual(type(results), list)
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self.assertEqual(len(results), 2)
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self.assertIn('4.295×10^8 inches'.decode('utf-8'), results[0]['answer'])
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self.assertIn('distance from nairobi to kyoto in inches - Wolfram|Alpha', results[1]['title'])
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self.assertEquals('http://www.wolframalpha.com/input/?i=+distance+from+nairobi+to+kyoto+in+inches',
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results[1]['url'])
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# TODO
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