(C# UWP/WinRT) SFTP Fsync -- Flush an Open File on the Server

Demonstrates how to flush the contents of an open file on the server. This example only works for servers that implement the fsync@openssh.com extension.

Note: This example requires Chilkat v9.5.0.71 or later.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.SFtp sftp = new Chilkat.SFtp();

// Pass a domain or IP address..
bool success = await sftp.ConnectAsync("my-sftp-server.com",22);
if (success == true) {
    success = await sftp.AuthenticatePwAsync("mySFtpLogin","mySFtpPassword");
}

if (success == true) {
    success = await sftp.InitializeSftpAsync();
}

if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

// Open a file on the server for writing.
string handle = await sftp.OpenFileAsync("myTest.txt","writeOnly","createTruncate");
if (sftp.LastMethodSuccess != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

// Write some text to the file:
success = await sftp.WriteFileTextAsync(handle,"ansi","abcdefghijklmnopqrstuvwxyz");
if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

// Make sure the server flushes what we wrote to the disk..
// (this is requires a server that implements the fsync@openssh.com SFTP protocol extension)
success = await sftp.FsyncAsync(handle);
if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

// ....
// ....

success = await sftp.WriteFileTextAsync(handle,"ansi","ABCDEFGHIJKLMNOPQRSTUVWXYZ");
if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

// Close the file.
success = await sftp.CloseHandleAsync(handle);
if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

Debug.WriteLine("Success.");