[enh] bing engine added

searx/engines/bing.py

@@ -0,0 +1,26 @@
+from lxml import html
+from urllib import urlencode
+from cgi import escape
+
+base_url = 'http://www.bing.com/'
+search_string = 'search?{query}'
+
+def request(query, params):
+    search_path = search_string.format(query=urlencode({'q': query}))
+    #if params['category'] == 'images':
+    #    params['url'] = base_url + 'images/' + search_path
+    params['url'] = base_url + search_path
+    return params
+
+
+def response(resp):
+    global base_url
+    results = []
+    dom = html.fromstring(resp.content)
+    for result in dom.xpath('//div[@class="sa_cc"]'):
+        link = result.xpath('.//h3/a')[0]
+        url = link.attrib.get('href')
+        title = ' '.join(link.xpath('.//text()'))
+        content = escape(' '.join(result.xpath('.//p//text()')))
+        results.append({'url': url, 'title': title, 'content': content})
+    return results