fql get valid photo - facebook-fql

Question

I have written a fql to get photo from facebook.
fql = 'SELECT caption, owner, pid, src_big, created
FROM photo
WHERE aid IN (SELECT aid
FROM album
WHERE owner IN (111111) )
LIMIT 1,10';
But I found sometimes the app cannot get the photo from the src_big column.
How to write a fql or any other methods to make sure the returned photo url (e.g.src_big) is accessible?

Answer 1

Taken from the Facebook API:
The URL to the full-sized version of
the photo being queried. The image can
have a maximum width or height of
720px. This URL may be blank.
I think your issue is that you don't always get a src_big image. You should also query for the src_small image, as a fallback. Also, you can add a default image of your own, so that if neither image is available or acceptable, you can just use your default image.
For example:
fql = 'SELECT caption, owner, pid, src_big, src_small, created
FROM photo
WHERE aid IN (SELECT aid
FROM album
WHERE owner IN (111111) )
LIMIT 1,10';
And then in your code, check for something like....
//Where results = photo results array...
for(var i = 0; i<results.length; i++){
if(results[i].src_big == null){
if(results[i].src_small == null){
//Use default image
}
else{
//Use src_small
}
}
else{
//use src_big
}
}