IEnumerator _Download (BundleDownloadHandle handle)
{
if (cachePath == null)
cachePath = System.IO.Path.Combine (Environment.GetFolderPath (Environment.SpecialFolder.LocalApplicationData), "bundlecache");
var uri = handle.uri;
var dir = Path.Combine (Path.Combine (cachePath, uri.Host), Path.GetDirectoryName (uri.AbsolutePath).Substring (1));
var file = Path.GetFileName (uri.AbsolutePath);
var path = Path.Combine (dir, file);
if (File.Exists (path)) {
var www = new WWW ("file://" + path);
yield return www;
if (HandleDownload (handle, www)) {
handle.state = BundleDownloadState.Success;
handle.fromCache = true;
}
}
if (handle.state != BundleDownloadState.Success) {
var www = new WWW (uri.ToString ());
yield return www;
if (HandleDownload (handle, www)) {
Directory.CreateDirectory (dir);
File.WriteAllBytes (path, www.bytes);
handle.error = null;
handle.state = BundleDownloadState.Success;
} else {
handle.state = BundleDownloadState.Failure;
}
}
}
bool HandleDownload (BundleDownloadHandle handle, WWW www)
{
if (www.error == null) {
handle.asset = www.assetBundle;
if (www.error != null) {
handle.error = www.error;
return false;
} else {
if (handle.asset == null) {
handle.error = "Failed to load asset bundle";
return false;
} else {
return true;
}
}
} else {
handle.error = www.error;
return false;
}
}
public BundleDownloadHandle Download (string url)
{
var handle = new BundleDownloadHandle (url);
StartCoroutine (_Download (handle));
return handle;
}