AssetBundle download issue

Unity Engine
1

Hi devs,

I’ve encountered a problem regarding asset bundles… I’m using the LoadFromCacheOrDownload() method from the WWW class. The URL I’m passing to the method is that of a PHP file which in turn returns the asset bundle being asked for (i.e. http:///DownloadFile.php?bundleName=BUNDLENAME&token=TOKEN ). I did this to avoid the situation where a third party could simply enter the URL in the browser and download the asset bundles.

I’ve set a .htaccess file on the directory where I placed the asset bundles to avoid such scenario. The only way to access the asset bundle is via the PHP file. The problem is that the LoadFromCacheOrDownload builds its index based on the asset bundle name and version, like LoadFromCacheOrDownload(http://serverdomain.com/SomethingInHere.unity3d, 1) would translate to [SomethingInHere.unity3d = 1]. Now since the URL I’m passing is always the same, i.e. DownloadFile.php, there is no way for Unity3D to distinguish an asset bundle from its name.

How can I get around this? The only solution that I’m seeing is to implement the caching part myself.

Thanks in advance,

Regards,
Clayton

2

You have to handle the version yourself. This would be the same independent of the url actually and it would probably make sense to include the version in the response from a webservice for example to find out the version before requesting the file (would enable you to not make the url static either but session generated with only temporal validity)