From 4578575c284584a58cce0acd85f86bef2f49d77f Mon Sep 17 00:00:00 2001
From: a01200356 <a01200356@itesm.mx>
Date: Wed, 23 Dec 2015 00:01:00 -0600
Subject: [PATCH] Wolfie kinda works using API

---
 searx/engines/wolframalpha.py     | 60 ++++++++++++++++++++++++++
 searx/engines/wolframalpha_api.py | 70 +++++++++++++++++++++++++++++++
 searx/search.py                   |  2 +-
 searx/settings.yml                |  6 +++
 4 files changed, 137 insertions(+), 1 deletion(-)
 create mode 100644 searx/engines/wolframalpha.py
 create mode 100644 searx/engines/wolframalpha_api.py

diff --git a/searx/engines/wolframalpha.py b/searx/engines/wolframalpha.py
new file mode 100644
index 000000000..be467681f
--- /dev/null
+++ b/searx/engines/wolframalpha.py
@@ -0,0 +1,60 @@
+"""
+ WolframAlpha
+
+ @website     http://www.wolframalpha.com/
+
+ @using-api   yes
+ @results     no c
+ @stable      i guess so
+ @parse       result
+"""
+
+import wolframalpha
+
+# engine dependent config
+paging = False
+
+# search-url
+# url = 'http://www.wolframalpha.com/'
+# search_url = url+'input/?{query}'
+
+client_id = '5952JX-X52L3VKWT8'
+'''
+# do search-request
+def request(query, params):
+    params['url'] = search_url.format(query=urlencode({'i': query}))
+    print params
+
+    return params
+
+
+# get response from search-request
+def response(resp):
+    print resp
+
+    dom = html.fromstring(resp.text)
+    #resshit = dom.find_class('output pnt')
+    #for shit in resshit:
+        #print shit.text_content()
+    results = []
+    #results.append({'url': 'https://wikipedia.org', 'title': 'Wolfie, lol', 'content': 'es kwatro'})
+    #print results
+    #return results
+
+    # parse results
+    for result in dom.xpath(results_xpath):
+        print result
+        
+        link = result.xpath(link_xpath)[0]
+        href = urljoin(url, link.attrib.get('href'))
+        title = escape(extract_text(link))
+        content = escape(extract_text(result.xpath(content_xpath)))
+
+        # append result
+        results.append({'url': href,
+                        'title': title,
+                        'content': content})
+
+    print results
+    return results
+'''
diff --git a/searx/engines/wolframalpha_api.py b/searx/engines/wolframalpha_api.py
new file mode 100644
index 000000000..1cf908b62
--- /dev/null
+++ b/searx/engines/wolframalpha_api.py
@@ -0,0 +1,70 @@
+# Wolfram Alpha (Maths)
+#
+# @website     http://www.wolframalpha.com
+# @provide-api yes (http://api.wolframalpha.com/v2/)
+#
+# @using-api   yes
+# @results     XML
+# @stable      yes
+# @parse       result
+
+from urllib import urlencode
+from lxml import etree
+from searx.engines.xpath import extract_text
+from searx.utils import html_to_text
+
+# search-url
+base_url = 'http://api.wolframalpha.com/v2/query'
+search_url = base_url + '?appid={api_key}&{query}&format=plaintext'
+site_url = 'http://wolframalpha.com/input/?{query}'
+
+#embedded_url = '<iframe width="540" height="304" ' +\
+#    'data-src="//www.youtube-nocookie.com/embed/{videoid}" ' +\
+#    'frameborder="0" allowfullscreen></iframe>'
+
+# do search-request
+def request(query, params):
+    params['url'] = search_url.format(query=urlencode({'input': query}),
+                                      api_key=api_key)
+
+    # need this for url in response
+    global my_query
+    my_query = query
+
+    return params
+
+# replace private user area characters to make text legible
+def replace_pua_chars(text):
+    pua_chars = { u'\uf74c': 'd',
+                  u'\uf74d': u'\u212f',
+                  u'\uf74e': 'i',
+                  u'\uf7d9': '=' }
+
+    for k, v in pua_chars.iteritems():
+        text = text.replace(k, v)
+
+    return text
+
+# get response from search-request
+def response(resp):
+    results = []
+
+    search_results = etree.XML(resp.content)
+
+    # return empty array if there are no results
+    if search_results.xpath('/queryresult[attribute::success="false"]'):
+        return []
+
+    # parse result
+    result = search_results.xpath('//pod[attribute::primary="true"]/subpod/plaintext')[0].text
+    result = replace_pua_chars(result)
+
+    # bind url from site
+    result_url = site_url.format(query=urlencode({'i': my_query}))
+
+    # append result
+    results.append({'url': result_url,
+                    'title': result})
+
+    # return results
+    return results
diff --git a/searx/search.py b/searx/search.py
index 655b7808a..85d88b9d3 100644
--- a/searx/search.py
+++ b/searx/search.py
@@ -98,7 +98,7 @@ def make_callback(engine_name, callback, params, result_container):
         with threading.RLock():
             engines[engine_name].stats['page_load_time'] += search_duration
 
-        timeout_overhead = 0.2  # seconds
+        timeout_overhead = 0.5  # seconds
         timeout_limit = engines[engine_name].timeout + timeout_overhead
 
         if search_duration > timeout_limit:
diff --git a/searx/settings.yml b/searx/settings.yml
index c7f659e5f..1c8ba3f7f 100644
--- a/searx/settings.yml
+++ b/searx/settings.yml
@@ -300,6 +300,12 @@ engines:
     engine : vimeo
     shortcut : vm
 
+  - name : wolframalpha
+    shortcut : wa
+    engine : wolframalpha_api
+    api_key: '5952JX-X52L3VKWT8'
+    timeout: 6.0
+
 #The blekko technology and team have joined IBM Watson! -> https://blekko.com/
 #  - name : blekko images
 #    engine : blekko_images