The Facebook Graph API now supports HTTP ETags. ETags support on the Facebook Platform can help you reduce bandwidth consumption and client-side overhead by suppressing output when making Graph API calls.
This is how it works:
1.When you make a Graph API call, the response header includes ETag with a value that is the hash of the data returned in the API call. Pull this ETag value and use in Step-2.
2.Next time you make the same API call, include the If-None-Match request header with ETag value pulled from step-1 for this API call.
3.If the data hasn’t changed, the response status code would be 304 – Not Modified and no data is returned.
4.If the data has changed since last pull, the data is returned as usual with a new ETag. Pull the new ETag value and use for subsequent calls.
Note: While ETags help reduce the data traffic, the If-None-Match GET will still count against the throttling limits for your app and must not be performed at a frequent rate. We recommend only do it for data that doesn’t change frequently like user’s friends, likes, photo albums, photos etc. Do not use it for news feed, messages etc.
Latest posts by Parvez (see all)
- jQuery Google Map – Create your own complet Google Map - July 28, 2014
- Stickies – A jQuery UI Sticky Note Extension - July 26, 2014