getting high resolution photos that were posted on a page wall/feed

I'm getting my page wall with the open graph. And when someone posted a photo, I get it on the JSON

{
     "id": "27888702146_10150369820322147",
     "from": {
        "name": "brocoli",
        "category": "Record label",
        "id": "27888702146"
     },
     "message": "Vincent Epplay / David Fenech / Jac Berrocal \u00e0 Beaubourg ce soir, 19h, gratos.",
     "picture": "http://photos-f.ak.fbcdn.net/hphotos-ak-snc7/305819_10150369820292147_27888702146_8255527_583491475_s.jpg",
     "link": "https://www.facebook.com/photo.php?fbid=10150369820292147&set=a.386279807146.165840.27888702146&type=1",
     "icon": "http://static.ak.fbcdn.net/rsrc.php/v1/yz/r/StEh3RhPvjk.gif",
     "type": "photo",
     "object_id": "10150369820292147",
     "created_time": "2011-10-16T08:22:21+0000",
     "updated_time": "2011-10-16T08:22:21+0000",
     "likes": {
        "data": [
           {
              "name": "brocoli",
              "category": "Record label",
              "id": "27888702146"
           },
           {
              "name": "Agathe Morier",
              "id": "601668526"
           }
        ],
        "count": 2
     },
     "comments": {
        "count": 0
     },
     "is_published": true
  }

The problem is that the picture link is a low resolution copy of the picture.

How can I get the URL of the full picture ?

Thanks!!

Best

Geoffroy

Solution

You can get different version of the photo by querying Graph API with its object_id (not photo post_id which is id in results you provided).

Once you'll request the photo by object id you'll get array of images with URLs and dimensions:

http://graph.facebook.com/10150369820292147?fields=images

If you're attempting to access posts on a Facebook Page (such as for a company) instead of typical user profile, you firstly need to fetch the feed like this:

https://graph.facebook.com/v15.0/YOUR_PAGE_ID_HERE/feed?fields=attachments&access_token=...

And then access data[0].attachments.data[0].subattachments.data[0].target.id to get the object ID (or "target ID" in this case) which you can then use to perform an additional query to obtain the higher resolution image. Increment the numbers to get additional posts and images inside each post.