Uploading Dynamic Photo to Facebook using the API?

Posted on 2010-11-27
Last Modified: 2013-11-19

My App trying to uploading a dynamic photo (created by GD + pulling data from MySQL database) so the photos don't statically exist in the directory and for so I get this error :

Fatal error: Uncaught CurlException: 26: failed creating formpost data thrown in

Let's say I'm trying to upload which is dynamic photo you can see it by checking this url directly or calling it as image but If I tried to use it in my Facebook App it wouldn't upload. If I downloaded to photo to my PC then uploaded to my ftp the App would upload it successfully. So I'm sure that my code is working just fine but the problem is with being Dynamic photo (doesn't actually exist in my website ftp).

Please let me know how can I solve this problem.

Code attached:

Thanks for your time.
$photo_details = array(
    'message'=> $message
$file = "$_GET[id].png";
$photo_details['image'] = '@/home/username/public_html/files/' . $file;
$upload_photo = $facebook->api('/'.$album_uid.'/photos', 'post', $photo_details);

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Question by:Dido123
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LVL 110

Expert Comment

by:Ray Paseur
ID: 34225441
Can you please show us a complete code segment that works, like one with an existing file?

CURL error #26 is pretty well understood to be a read error.

Possibly the error arises because (1) the path to the dynamically generated photo is wrong or (2) the file permissions are too restrictive.

I'm also really unsure about this from line 4 of the post above: $file = "$_GET[id].png";

So my instant recommendation is to prepare each of your variables separately so you can visualize them.  Add var_dump($photo_details); after line 5 and see if you're getting the values you expect in that array.  Change line 6 to something more like what is in the code snippet.
$upload_photo = $facebook->api('/'.$album_uid.'/photos', 'post', $photo_details);

$str = '/' . $album_uid . '/photos';
$upload_photo = $facebook->api($str, 'post', $photo_details);

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LVL 110

Expert Comment

by:Ray Paseur
ID: 34225477
Wow, it works and does not bark about anything, so long as the id= parameter is a string.

<?php // RAY_temp_dido123.php
$file = "$_GET[id].png";

Barks about undefined index:

Reasonable output:

Strange output:[]=foo

I think I would write that line more like this, but it's apparently OK for your app the way it is.
if (!empty($_GET['id']))
    $file = $_GET['id'] . '.png';
    $file = 'default.png';

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Author Comment

ID: 34227124
Ray, thanks for your input. I did tried my code and it works if I uploaded 123.png to my ftp. The problem is the photos created dynamically when you call it. So it's not statically found in the ftp. How can I bypass this problem. All I can think of is that the Facebook API needs to find the actual photo in the directory when it tries to upload it. Is there anything that can somehow create a temp photo so the API can find it then it would be deleted after the upload completed or at least something in this way?

Thanks again for your help.
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LVL 110

Expert Comment

by:Ray Paseur
ID: 34228483
Without seeing the code, all we would be doing is guessing.  Have you tried the visualization techniques I suggested above?

If your script creates a file and marks it with permissions that make it readable, CURL should be able to read the file.

Author Comment

ID: 34244308
After a couple of days researching I came to conclusion that the problem is not in my code. The problem is code above can't read the image since it's dynamic image (requires running the php file which creates it first) so now my solution should be opening the dynamic image and presenting to the code above as static image so it can upload it. The problem is I can't even know where should I start to find my solution. Is fopen or fread might help here?

I really appreciate your help Ray.
LVL 110

Accepted Solution

Ray Paseur earned 500 total points
ID: 34244970
Let me say this again: "Without seeing the code, all we would be doing is guessing."

Show us how you create the dynamic image.  If you do the following things in order, it WILL work.

1. Create the image
2. Write the image to your server in the file system
3. Set the permissions on the file to allow read and execute.
4. Only after that, treat the file as a static image.

You may want a garbage collection routine just prior to #1 -- it would delete any files that are more than two days old.

Author Closing Comment

ID: 34255109
Thank you. Problem solved. That's exactly what I did.

I created temp file for photos I want to upload then I added cron job to empty the temp folder once a day. Thanks again.
LVL 110

Expert Comment

by:Ray Paseur
ID: 34257979
Bingo!  Thanks for the points - glad it's pointed in the right direction, ~Ray

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