[fix] flickr-noapi logging ++ use correct image url - fixes #203 #181

searx/engines/flickr-noapi.py

 from urllib import urlencode
 from json import loads
 import re
+from searx.engines import logger
+
+
+logger = logger.getChild('flickr-noapi')
 
 categories = ['images']
 
         # From the biggest to the lowest format
         for image_size in image_sizes:
             if image_size in photo['sizes']:
-                img_src = photo['sizes'][image_size]['displayUrl']
+                img_src = photo['sizes'][image_size]['url']
                 break
 
         if not img_src:
+            logger.debug('cannot find valid image size: {0}'.format(repr(photo)))
             continue
 
         if 'id' not in photo['owner']:
 
 # For a bigger thumbnail, keep only the url_z, not the url_n
         if 'n' in photo['sizes']:
-            thumbnail_src = photo['sizes']['n']['displayUrl']
+            thumbnail_src = photo['sizes']['n']['url']
         elif 'z' in photo['sizes']:
-            thumbnail_src = photo['sizes']['z']['displayUrl']
+            thumbnail_src = photo['sizes']['z']['url']
         else:
             thumbnail_src = img_src