Why use FTP if you don't need Credential to access the files? You can just place the files in your server then access them with the WWW or UnityWebRequest API.
To answer your FTP question, WWW is not meant to be used with the FTP protocol. This is what the FtpWebRequest API is used for.
Below is a sample of FtpWebRequest.
private byte[] downloadWithFTP(string ftpUrl, string savePath = "", string userName = "", string password = "")
{
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(new Uri(ftpUrl));
//request.Proxy = null;
request.UsePassive = true;
request.UseBinary = true;
request.KeepAlive = true;
//If username or password is NOT null then use Credential
if (!string.IsNullOrEmpty(userName) && !string.IsNullOrEmpty(password))
{
request.Credentials = new NetworkCredential(userName, password);
}
request.Method = WebRequestMethods.Ftp.DownloadFile;
//If savePath is NOT null, we want to save the file to path
//If path is null, we just want to return the file as array
if (!string.IsNullOrEmpty(savePath))
{
downloadAndSave(request.GetResponse(), savePath);
return null;
}
else
{
return downloadAsbyteArray(request.GetResponse());
}
}
byte[] downloadAsbyteArray(WebResponse request)
{
using (Stream input = request.GetResponseStream())
{
byte[] buffer = new byte[16 * 1024];
using (MemoryStream ms = new MemoryStream())
{
int read;
while (input.CanRead && (read = input.Read(buffer, 0, buffer.Length)) > 0)
{
ms.Write(buffer, 0, read);
}
return ms.ToArray();
}
}
}
void downloadAndSave(WebResponse request, string savePath)
{
Stream reader = request.GetResponseStream();
//Create Directory if it does not exist
if (!Directory.Exists(Path.GetDirectoryName(savePath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(savePath));
}
FileStream fileStream = new FileStream(savePath, FileMode.Create);
int bytesRead = 0;
byte[] buffer = new byte[2048];
while (true)
{
bytesRead = reader.Read(buffer, 0, buffer.Length);
if (bytesRead == 0)
break;
fileStream.Write(buffer, 0, bytesRead);
}
fileStream.Close();
}
Usage:
Download and save(No Credential):
string path = Path.Combine(Application.persistentDataPath, "FTP Files");
path = Path.Combine(path, "data.png");
downloadWithFTP("ftp://yourUrl.com/yourFile", path);
Download and save(With Credential):
string path = Path.Combine(Application.persistentDataPath, "FTP Files");
path = Path.Combine(path, "data.png");
downloadWithFTP("ftp://yourUrl.com/yourFile", path, "UserName", "Password");
Download Only (No Credential):
string path = Path.Combine(Application.persistentDataPath, "FTP Files");
path = Path.Combine(path, "data.png");
byte[] yourImage = downloadWithFTP("ftp://yourUrl.com/yourFile", "");
//Convert to Sprite
Texture2D tex = new Texture2D(250, 192);
tex.LoadImage(yourImage);
Sprite s = Sprite.Create(tex, new Rect(0, 0, texture2D.width, texture2D.height), new Vector2(0.5f, 0.5f));
Download Only (With Credential):
string path = Path.Combine(Application.persistentDataPath, "FTP Files");
path = Path.Combine(path, "data.png");
byte[] yourImage = downloadWithFTP("ftp://yourUrl.com/yourFile", "", "UserName", "Password");
//Convert to Sprite
Texture2D tex = new Texture2D(250, 192);
tex.LoadImage(yourImage);
Sprite s = Sprite.Create(tex, new Rect(0, 0, texture2D.width, texture2D.height), new Vector2(0.5f, 0.5f));
