Ahmed Nuaman Freelance Designer and Developer

Following my tutorial how to use PureMVC on Flashtuts+, I got a few comments about an error that Flash Debug Player throws when loading an image from Flickr:

SecurityError: Error #2122: Security sandbox violation: LoaderInfo.content: http://flashtuts.s3.amazonaws.com/ 026_PureMVC/App.swf cannot access http://farm3.static.flickr.com/2472/ 3549227972_7e6bd4d79a_t.jpg. A policy file is required, but the checkPolicyFile flag was not set when this media was loaded.
at flash.display::LoaderInfo/get content()
at com.flashtuts.view.component::ImagesView/handleLoaderComplete()

Now there are two ways around this:

1. Using a PHP Proxy
   This is the sneaky way as you’ll be loading images from Flickr and then putting them on your server. It’s not the best way, but it does have a great  advantage being that because the images are on your server, you won’t have to wait for the Flickr service (as it can get slow) nor will it effect the band width usage on your account.
2. Using ‘LoaderContext‘ in AS3
   This is the proper way as you’re not putting the images on your server, but there are times when Flickr does get busy and this often causes issues with your Flash file if you haven’t put in the proper ‘try’ and ‘catch’ statements.

(more…)