Add Reddit search engine

searx/engines/reddit.py

@@ -0,0 +1,74 @@
+"""
+ Reddit
+
+ @website      https://www.reddit.com/
+ @provide-api  yes (https://www.reddit.com/dev/api)
+
+ @using-api    yes
+ @results      JSON
+ @stable       yes
+ @parse        url, title, content, thumbnail, publishedDate
+"""
+
+import json
+from cgi import escape
+from urllib import urlencode
+from urlparse import urlparse
+from datetime import datetime
+
+# engine dependent config
+categories = ['general', 'images', 'news', 'social media']
+page_size = 25
+
+# search-url
+search_url = 'https://www.reddit.com/search.json?{query}'
+
+
+# do search-request
+def request(query, params):
+    query = urlencode({'q': query,
+                       'limit': page_size})
+    params['url'] = search_url.format(query=query)
+
+    return params
+
+
+# get response from search-request
+def response(resp):
+    img_results = []
+    text_results = []
+
+    search_results = json.loads(resp.text)
+
+    # return empty array if there are no results
+    if 'data' not in search_results:
+        return []
+
+    posts = search_results.get('data', {}).get('children', [])
+
+    # process results
+    for post in posts:
+        data = post['data']
+
+        # extract post information
+        params = {
+            'url': data['url'],
+            'title': data['title']
+        }
+
+        # if thumbnail field contains a valid URL, we need to change template
+        thumbnail = data['thumbnail']
+        url_info = urlparse(thumbnail)
+        # netloc & path
+        if url_info[1] != '' and url_info[2] != '':
+            params['thumbnail_src'] = thumbnail
+            params['template'] = 'images.html'
+            img_results.append(params)
+        else:
+            created = datetime.fromtimestamp(data['created_utc'])
+            params['content'] = escape(data['selftext'])
+            params['publishedDate'] = created
+            text_results.append(params)
+
+    # show images first and text results second
+    return img_results + text_results