[enh] startpage engine added

searx/engines/startpage.py

+from urllib import quote
+from lxml import html
+from urlparse import urljoin
+from cgi import escape
+
+base_url = 'http://startpage.com/'
+search_url = base_url+'do/search'
+
+def request(query, params):
+    global search_url
+    query = quote(query.replace(' ', '+'), safe='+')
+    params['url'] = search_url
+    params['method'] = 'POST'
+    params['data'] = {'query': query}
+    return params
+
+
+def response(resp):
+    global base_url
+    results = []
+    dom = html.fromstring(resp.text)
+    for result in dom.xpath('//div[@class="result"]'):
+        link = result.xpath('.//h3/a')[0]
+        url = urljoin(base_url, link.attrib.get('href'))
+        title = ' '.join(link.xpath('.//text()'))
+        content = escape(' '.join(result.xpath('.//p[@class="desc"]//text()')))
+        results.append({'url': url, 'title': title, 'content': content})
+    return results