Get Facebook user's profile picture prior to authenticating app - facebook

Question

Summary:
I am working on a website that connects to Facebook through the Graph API. I was asked whether I can get a user's profile picture if they are already logged into Facebook, but prior to the user authenticating the app. Is this possible?
EDIT:
I know you can get people's profile picture by going to http://graph.facebook.com/USERNAME_OR_USERID/picture?type=large, but would I be able to get a user's username or ID if they are logged into Facebook, but have not authorized my app?
Details:
According to the Facebook API User documentation, you can get their Facebook ID without an access_token, and I know if you go directly to a user's /me URL you can see their basic information. With the Facebook ID, I can grab their profile pic.
However, when I try to call it from the website using the following code, I get an OAuthException error.
FB.api('/me', function(response) {
console.log(response);
});
I'm guessing that they have to authenticate the app, but I'm looking to see if I may have missed a way of getting their profile pic.
Thanks for your help!

Answer 1

You can get everyone's Facebook profile picture without authentication.
You just call http://graph.facebook.com/USERID/picture?type=large.
This URL redirects you to image URL.
Edit: Querying by username is not allowed anymore, so I updated USERNAME_OR_USERID as USERID.

Answer 2

yes you can get..
http://graph.facebook.com/naseer.panhwer/picture?type=normal
http://graph.facebook.com/naseer.panhwer/picture?type=small
http://graph.facebook.com/naseer.panhwer/picture?type=large

Answer 3

You can generate an access token using an application id and secret as follows:
https://graph.facebook.com/oauth/access_token?client_id={appID}&client_secret={appSecret}&grant_type=client_credentials
NOTE: Don't do this on the client side as you risk having your application getting hijacked.
The resulting token can be user to query users with the graph API without a login prompt.

Answer 4

How to get FB images w/o oauth or access tokens:
I was trying to get only images of few members but I was stuck then wrote this snippet and worked for me,
The HTML tag
<img src="getFbImage.php?id=<fbid_of_the_person>&type=[small|large]" />
The PHP code
<?php
$remoteImage = !isset($_GET['id']) ? "../images/default.png" : getImg($_GET['id']);
$imginfo = getimagesize($remoteImage);
header("Content-type: ".$imginfo['mime']);
readfile($remoteImage);
function getImg($id){
$dom = new DOMDocument;
$dom->loadHTML(getData($id));
$tags = $dom->getElementsByTagName('img');
$img = '';
foreach ($tags as $tag) {
$img =$tag->getAttribute('src');
if($img=='')
continue;
else if(isset($_GET['type']) && $_GET['type']=='large')
break;
}
//This iteration has a lot of images try your luck.
return $img;
}
function getData($id){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,'https://www.facebook.com/photo.php?fbid='.$id);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 Firefox/39.0');
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
?>
I only had to use a 30x30 image and I got what I wanted. Check out it also provides you a large image.
Cheers!
Joy