Command Line posts large files, .NET fails :: Support Forum

enquedo@hotmail.com
Joined:: 2023-11-15
Posts:: 1
Location:: New York

Command Line posts large files, .NET fails

2023-11-15 23:04

Someone else wrote a command line to put files to an SFTP server. I am trying to convert it to using the .NET library. For files under 2.5 GB, the .NET code works fine but bombs when I go over. The command line had no issue with a 4 GB file, so I don't understand what I'm missing in my conversion from the command line to the .NET.
The command line:

winscp.com /command "open ftp://ftpuser:ftppwd@ftpserver -explicittls" "ascii" "call site sitecmd" "put localfile remotefile " "close" "exit"

The .NET code

SessionOptions SOt = new SessionOptions
{
    Protocol = Protocol.Ftp,
    FtpSecure = FtpSecure.Explicit,
    HostName = "ftpserver",
    UserName = "ftpuser",
    Password = "ftppwd",
    Timeout = new TimeSpan(6, 0, 0)
}
SOt.AddRawSettings("SendBuf", "0");
using (WinSCP.Session Ses = new WinSCP.Session())
{
    Ses.SessionLogPath = @"c:\temp\log.txt";
    Ses.Open(SOt);
    TransferOptions Trn = new TransferOptions();
    Trn.TransferMode = TransferMode.Ascii;
    Ses.ExecuteCommand(sitecmd);
    TransferOperationResult TrnRes;
    TrnRes = Ses.PutFiles(localfile, remotefile, false, Trn);
    Trn.Check();
}

When I looked at the logs, the only thing I found different was that when I was sending the large file through the command line, the buffer grew to 2GB, but in the .NET, it stopped growing at 1GB (this is why I added the Raw Setting, to try to get the buffer to grow but it didn't look like it did anything).
Thoughts?

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