Add an No Api Flickr Engine

It uses the webpage json infos to build the results
Let the user choose the engine in setting.yml. Noapi active by default
+ little corrections on Flickr engine

searx/engines/flickr-noapi.py

@@ -0,0 +1,102 @@
+#!/usr/bin/env python
+
+## Flickr (Images)
+# 
+# @website     https://www.flickr.com
+# @provide-api yes (https://secure.flickr.com/services/api/flickr.photos.search.html) 
+# 
+# @using-api   no
+# @results     HTML
+# @stable      no
+# @parse       url, title, thumbnail, img_src
+
+from urllib import urlencode
+from json import loads
+from urlparse import urljoin
+from lxml import html
+import re
+
+categories = ['images']
+
+url = 'https://secure.flickr.com/'
+search_url = url+'search/?{query}&page={page}'
+photo_url = 'https://www.flickr.com/photos/{userid}/{photoid}'
+regex = re.compile(r"\"search-photos-models\",\"photos\":(.*}),\"totalItems\":", re.DOTALL)
+
+paging = True
+
+def build_flickr_url(user_id, photo_id):
+    return photo_url.format(userid=user_id,photoid=photo_id)
+
+
+def request(query, params):
+    params['url'] = search_url.format(query=urlencode({'text': query}),
+                                      page=params['pageno'])
+    return params
+
+
+def response(resp):
+    results = []
+    
+    matches = regex.search(resp.text)
+    
+    if matches == None:
+        return results
+
+    match = matches.group(1)
+    search_results = loads(match)
+    
+    if not '_data' in search_results:
+        return []
+    
+    photos = search_results['_data']
+    
+    for photo in photos:
+        
+        # In paged configuration, the first pages' photos are represented by a None object
+        if photo == None:
+            continue
+        
+        # From the biggest to the lowest format
+        if 'o' in photo['sizes']:
+            img_src = photo['sizes']['o']['displayUrl']
+        elif 'k' in photo['sizes']:
+            img_src = photo['sizes']['k']['displayUrl']
+        elif 'h' in photo['sizes']:
+            img_src = photo['sizes']['h']['displayUrl']
+        elif 'b' in photo['sizes']:
+            img_src = photo['sizes']['b']['displayUrl']
+        elif 'c' in photo['sizes']:
+            img_src = photo['sizes']['c']['displayUrl']
+        elif 'z' in photo['sizes']:
+            img_src = photo['sizes']['z']['displayUrl']
+        elif 'n' in photo['sizes']:
+            img_src = photo['sizes']['n']['displayUrl']
+        elif 'm' in photo['sizes']:
+            img_src = photo['sizes']['m']['displayUrl']
+        elif 't' in photo['sizes']:
+            img_src = photo['sizes']['to']['displayUrl']
+        elif 'q' in photo['sizes']:
+            img_src = photo['sizes']['q']['displayUrl']
+        elif 's' in photo['sizes']:
+            img_src = photo['sizes']['s']['displayUrl']
+        else:
+            continue
+        
+        url = build_flickr_url(photo['owner']['id'], photo['id'])
+
+        title = photo['title']
+        
+        content = '<span class="photo-author">'+ photo['owner']['username'] +'</span><br />'
+        
+        if 'description' in photo:
+            content = content + '<span class="description">' + photo['description'] + '</span>'
+
+        # append result
+        results.append({'url': url,
+                        'title': title,
+                        'img_src': img_src,
+                        'content': content,
+                        'template': 'images.html'})
+        
+    return results

searx/engines/flickr.py

@@ -13,9 +13,6 @@
 
 from urllib import urlencode
 from json import loads
-from urlparse import urljoin
-from lxml import html
-from time import time
 
 categories = ['images']
 

searx/settings.yml

@@ -65,12 +65,15 @@ engines:
 #    categories : files
 #    shortcut : fc
 
-# api-key required: https://www.flickr.com/services/apps/create/
-#  - name : flickr
+  - name : flickr
+    categories : images
+    shortcut : fl
+# You can use the engine using the official stable API, but you need an API key
+# See : https://www.flickr.com/services/apps/create/
 #    engine : flickr
-#    categories : images
-#    shortcut : fl
 #    api_key: 'apikey' # required!
+# Or you can use the html non-stable engine, activated by default
+    engine : flickr-noapi
 
   - name : general-file
     engine : generalfile