append link to result in wolframalpha_api (and the tests to validate that)

searx/engines/wolframalpha_api.py

 
 from urllib import urlencode
 from lxml import etree
+from re import search
 
 # search-url
 base_url = 'http://api.wolframalpha.com/v2/query'
 search_url = base_url + '?appid={api_key}&{query}&format=plaintext'
+site_url = 'http://www.wolframalpha.com/input/?{query}'
 api_key = ''  # defined in settings.yml
 
 # xpath variables
 failure_xpath = '/queryresult[attribute::success="false"]'
 answer_xpath = '//pod[attribute::primary="true"]/subpod/plaintext'
+input_xpath = '//pod[starts-with(attribute::title, "Input")]/subpod/plaintext'
 
 
 # do search-request
 
             results.append({'answer': answer})
 
-    # TODO: append a result with title and link, like in the no api version
+    # if there's no input section in search_results, check if answer has the input embedded (before their "=" sign)
+    try:
+        query_input = search_results.xpath(input_xpath)[0].text
+    except IndexError:
+        query_input = search(u'([^\uf7d9]+)', answers[0].text).group(1)
+
+    # append link to site
+    result_url = site_url.format(query=urlencode({'i': query_input.encode('utf-8')}))
+    results.append({'url': result_url,
+                    'title': query_input + " - Wolfram|Alpha"})
 
     return results

searx/settings.yml

     # You can use the engine using the official stable API, but you need an API key
     # See : http://products.wolframalpha.com/api/
     #    engine : wolframalpha_api
-    #    api_key: '' # required!
+    #    api_key: 'apikey' # required!
     engine : wolframalpha_noapi
     timeout: 6.0
     disabled : True

searx/tests/engines/test_wolframalpha_api.py

         response = mock.Mock(content=xml)
         results = wolframalpha_api.response(response)
         self.assertEqual(type(results), list)
-        self.assertEqual(len(results), 1)
+        self.assertEqual(len(results), 2)
         self.assertIn('i', results[0]['answer'])
+        self.assertIn('sqrt(-1) - Wolfram|Alpha', results[1]['title'])
+        self.assertEquals('http://www.wolframalpha.com/input/?i=sqrt%28-1%29', results[1]['url'])
 
         xml = """<?xml version='1.0' encoding='UTF-8'?>
             <queryresult success='true'
         response = mock.Mock(content=xml)
         results = wolframalpha_api.response(response)
         self.assertEqual(type(results), list)
-        self.assertEqual(len(results), 1)
+        self.assertEqual(len(results), 2)
         self.assertIn('log(x)+c', results[0]['answer'])
+        self.assertIn('∫1/xx - Wolfram|Alpha'.decode('utf-8'), results[1]['title'])
+        self.assertEquals('http://www.wolframalpha.com/input/?i=%E2%88%AB1%2Fx%EF%9D%8Cx', results[1]['url'])
 
         xml = """<?xml version='1.0' encoding='UTF-8'?>
         <queryresult success='true'
             datatypes='Solve'
             timedout=''
             timedoutpods=''
-            timing='0.883'
-            parsetiming='0.337'
+            timing='0.79'
+            parsetiming='0.338'
             parsetimedout='false'
             recalculate=''
-            id='MSPa347225h1ea85fgfbgb4000064ff000d25g5df3f'
-            host='http://www5a.wolframalpha.com'
-            server='52'
-            related='http://www5a.wolframalpha.com/api/v2/relatedQueries.jsp?...'
+            id='MSPa7481f7i06d25h3deh2900004810i3a78d9b4fdc'
+            host='http://www5b.wolframalpha.com'
+            server='23'
+            related='http://www5b.wolframalpha.com/api/v2/relatedQueries.jsp?id=...'
             version='2.6'>
          <pod title='Input interpretation'
              scanner='Identity'
              error='false'
              numsubpods='1'>
           <subpod title=''>
-           <img src='http://www5a.wolframalpha.com/Calculate/MSP/MSP349225h1ea85fgfbgb400005dhd93b9eegg8f32?...'
-               alt='solve x^2+x = 0'
-               title='solve x^2+x = 0'
-               width='157'
-               height='35' />
-           <plaintext>solve x^2+x = 0</plaintext>
+           <plaintext>solve x^2+x0</plaintext>
           </subpod>
          </pod>
          <pod title='Results'
              numsubpods='2'
              primary='true'>
           <subpod title=''>
-           <img src='http://www5a.wolframalpha.com/Calculate/MSP/MSP350225h1ea85fgfbgb400005b1ebcefaha3ac97?...'
-               alt='x = -1'
-               title='x = -1'
-               width='47'
-               height='18' />
-           <plaintext>x = -1</plaintext>
+           <plaintext>x-1</plaintext>
           </subpod>
           <subpod title=''>
-           <img src='http://www5a.wolframalpha.com/Calculate/MSP/MSP351225h1ea85fgfbgb4000032fic0ig981hc936?...'
-               alt='x = 0'
-               title='x = 0'
-               width='36'
-               height='18' />
-           <plaintext>x = 0</plaintext>
+           <plaintext>x0</plaintext>
           </subpod>
           <states count='1'>
            <state name='Step-by-step solution'
              error='false'
              numsubpods='1'>
           <subpod title=''>
-           <img src='http://www5a.wolframalpha.com/Calculate/MSP/MSP352225h1ea85fgfbgb40000464054c665hc5dee?...'
-               alt=''
-               title=''
-               width='300'
-               height='181' />
            <plaintext></plaintext>
           </subpod>
          </pod>
              error='false'
              numsubpods='1'>
           <subpod title=''>
-           <img src='http://www5a.wolframalpha.com/Calculate/MSP/MSP353225h1ea85fgfbgb400005ab1c8aai366fe46?...'
-               alt=''
-               title=''
-               width='310'
-               height='36' />
            <plaintext></plaintext>
           </subpod>
          </pod>
         response = mock.Mock(content=xml)
         results = wolframalpha_api.response(response)
         self.assertEqual(type(results), list)
-        self.assertEqual(len(results), 2)
-        self.assertIn('x = -1', results[0]['answer'])
-        self.assertIn('x = 0', results[1]['answer'])
+        self.assertEqual(len(results), 3)
+        self.assertIn('x=-1', results[0]['answer'])
+        self.assertIn('x=0', results[1]['answer'])
+        self.assertIn('solve x^2+x0 - Wolfram|Alpha'.decode('utf-8'), results[2]['title'])
+        self.assertEquals('http://www.wolframalpha.com/input/?i=solve+x%5E2%2Bx%EF%9F%990', results[2]['url'])