From 988cf38196cc26aa1473c7ece024ee178a856655 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?No=C3=A9mi=20V=C3=A1nyi?= <sitbackandwait@gmail.com>
Date: Sat, 17 Feb 2018 21:36:34 +0100
Subject: [PATCH] fix Microsoft Academic engine

---
 searx/engines/microsoft_academic.py | 75 +++++++++++++++++++++++++++++
 searx/settings.yml                  | 10 +---
 2 files changed, 76 insertions(+), 9 deletions(-)
 create mode 100644 searx/engines/microsoft_academic.py

diff --git a/searx/engines/microsoft_academic.py b/searx/engines/microsoft_academic.py
new file mode 100644
index 00000000..9387b08d
--- /dev/null
+++ b/searx/engines/microsoft_academic.py
@@ -0,0 +1,75 @@
+"""
+Microsoft Academic (Science)
+
+@website     https://academic.microsoft.com
+@provide-api yes
+@using-api   no
+@results     JSON
+@stable      no
+@parse       url, title, content
+"""
+
+from datetime import datetime
+from json import loads
+from uuid import uuid4
+
+from searx.url_utils import urlencode
+from searx.utils import html_to_text
+
+categories = ['images']
+paging = True
+result_url = 'https://academic.microsoft.com/api/search/GetEntityResults?{query}'
+
+
+def request(query, params):
+    correlation_id = uuid4()
+    msacademic = uuid4()
+    time_now = datetime.now()
+
+    params['url'] = result_url.format(query=urlencode({'correlationId': correlation_id}))
+    params['cookies']['msacademic'] = str(msacademic)
+    params['cookies']['ai_user'] = 'vhd0H|{now}'.format(now=str(time_now))
+    params['method'] = 'POST'
+    params['data'] = {
+        'Query': '@{query}@'.format(query=query),
+        'Limit': 10,
+        'Offset': params['pageno'] - 1,
+        'Filters': '',
+        'OrderBy': '',
+        'SortAscending': False,
+    }
+
+    return params
+
+
+def response(resp):
+    results = []
+    response_data = loads(resp.text)
+
+    for result in response_data['results']:
+        url = _get_url(result)
+        title = result['e']['dn']
+        content = _get_content(result)
+        results.append({
+            'url': url,
+            'title': html_to_text(title),
+            'content': html_to_text(content),
+        })
+
+    return results
+
+
+def _get_url(result):
+    if 's' in result['e']:
+        return result['e']['s'][0]['u']
+    return 'https://academic.microsoft.com/#/detail/{pid}'.format(pid=result['id'])
+
+
+def _get_content(result):
+    if 'd' in result['e']:
+        content = result['e']['d']
+        if len(content) > 300:
+            return content[:300] + '...'
+        return content
+
+    return ''
diff --git a/searx/settings.yml b/searx/settings.yml
index e819eada..3903bbf1 100644
--- a/searx/settings.yml
+++ b/searx/settings.yml
@@ -398,15 +398,7 @@ engines:
     shortcut : lo
 
   - name : microsoft academic
-    engine : json_engine
-    paging : True
-    search_url : https://academic.microsoft.com/api/search/GetEntityResults?query=%40{query}%40&filters=&offset={pageno}&limit=8&correlationId=undefined
-    results_query : results
-    url_query : u
-    title_query : dn
-    content_query : d
-    page_size : 8
-    first_page_num : 0
+    engine : microsoft_academic
     categories : science
     shortcut : ma