(MFC) 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 C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkSFtp.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkSFtp sftp;

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

    if (success == true) {
        success = sftp.InitializeSftp();
    }

    if (success != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Open a file on the server for writing.
    const char *handle = sftp.openFile("myTest.txt","writeOnly","createTruncate");
    if (sftp.get_LastMethodSuccess() != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Write some text to the file:
    success = sftp.WriteFileText(handle,"ansi","abcdefghijklmnopqrstuvwxyz");
    if (success != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        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 = sftp.Fsync(handle);
    if (success != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

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

    success = sftp.WriteFileText(handle,"ansi","ABCDEFGHIJKLMNOPQRSTUVWXYZ");
    if (success != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Close the file.
    success = sftp.CloseHandle(handle);
    if (success != true) {
        strOut.append(sftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append("Success.");
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }