I would like to upload a photo to facebook for a user in the default album for an application. This is described under publishing here: http://developers.facebook.com/docs/reference/api/photo
The method has been answered here: http://stackoverflow.com/questions/2964410/how-can-i-upload-photos-to-album-using-facebook-graph-api. I am using the following:
$args = array(
'message' => 'Photo Caption',
'image' => '@'.realpath("image.png")
);
$data = $facebook->api('/me/photos', 'post', $args);
However I get the exception "(#324) Requires upload file" when I attempt this. I have a valid session and I have the publish_stream and user_photos permissions. I can retrieve data using the API. The image file is definitely valid because it can be loaded with file_get_contents(realpath("image.png"))
.
I've tried this solution, using curl, which works perfectly: http://stackoverflow.com/questions/2718610/upload-photo-to-album/2728275#2728275
$args = array(
'message' => 'Photo from application',
'pic.png' => '@'.realpath('pic.png')
);
$tok = $session['access_token']
$url = 'http://graph.facebook.com/'.$album_id.'/photos?access_token='.$tok;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $args);
$data = curl_exec($ch);
Compared with Facebook's PHP SDK curl which looks like this (using the same $args and $url):
$ch = curl_init();
$opts = self::$CURL_OPTS;
$opts[CURLOPT_POSTFIELDS] = http_build_query($args, null, '&');
$opts[CURLOPT_URL] = $url;
curl_setopt_array($ch, $opts);
$data= curl_exec($ch);
Why doesn't the PHP version work? Looks like the http_build_query() function is interfering with loading the image. I don't know enough about curl to understand what's going on here.