DownloadHandlerAssetBundle from password protected ftp server on Android

Questions & Answers
1

Is it possible to use the DownloadHandlerAssetBundle (UnityWebRequest) to download from a password protected ftp server on Android?

I got it working on PC by using this format for the url: ftp://username:password@hostname/

But it looks like that isn’t supported on Android. I ended up trying to use SetRequestHeader(“AUTHORIZATION”, “Basic” + base64UsernameAndPassword). But that wouldn’t even work on PC. I’m guessing that’s not part of the ftp protocol.

I’ve tried searching for the solution but came up empty.

2

I had your same problem. The Doc says that you can only use UnityWebRequest on anonimous ftps, so I finally ended up using .net FtpWebRequest for pre-downloading bundles to disk and after that load them using www:

private void downloadFileToDir( string file, string dir) {
        try {
            FtpWebRequest ftpRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ip + dir + '/' + file));
            ftpRequest.Method = WebRequestMethods.Ftp.DownloadFile;
            //ftpRequest.UsePassive = true;
            ftpRequest.UseBinary = true;
            ftpRequest.KeepAlive = false;
            ftpRequest.Credentials = new NetworkCredential(userName, password);

            FtpWebResponse responseFileDownload = (FtpWebResponse)ftpRequest.GetResponse();
            Stream responseStream = responseFileDownload.GetResponseStream();
            FileStream writeStream = new FileStream(Application.persistentDataPath + "/" + dir + "/" + file, FileMode.Create);

            int Length = 2048;
            Byte[] buffer = new Byte[Length];
            int bytesRead = responseStream.Read(buffer, 0, Length);
            while (bytesRead > 0) {
                writeStream.Write(buffer, 0, bytesRead);
                bytesRead = responseStream.Read(buffer, 0, Length);
            }
            writeStream.Close();
            responseFileDownload.Close();
        }
        catch (Exception e) {
            Debug.Log("Could not download file " + dir + '/' + file + "/n" + e.ToString());
        }
    }

For loading the bundles:

using (WWW www = new WWW("file://" + Application.persistentDataPath + "/yourRoute/yourAssetBundle/")) { 

            yield return www;
            if (www.error != null)
                throw new Exception("WWW download had an error:" + www.error);
            AssetBundle bundle  = www.assetBundle;
....