Write Bytes to a Remote SFTP File (BinData)

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Demonstrates the Chilkat SFtp.WriteFileBd method, which appends all bytes in a BinData to the remote file identified by an open handle. The first argument is the handle and the second is the BinData.

Note: This example uses a relative local path, which is resolved against the application's current working directory. Absolute local paths may also be used. Supply the path appropriate to your own environment.

Background: This is the binary counterpart to WriteFileText — the right choice for images, archives, or any non-text content, where a charset conversion would corrupt the data. Combined with an appropriate OpenFile disposition it can create, overwrite, or append; here the file is created/truncated first so the result is exactly the BinData contents.

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    success := false

    //  Demonstrates the SFtp.WriteFileBd method, which appends all bytes in a BinData to the remote
    //  file identified by an open handle.  The 1st argument is the handle and the 2nd is the BinData.

    sftp := chilkat.NewSFtp()

    //  Connect, authenticate, and initialize the SFTP subsystem.
    port := 22
    success = sftp.Connect("sftp.example.com",port)
    if success == false {
        fmt.Println(sftp.LastErrorText())
        sftp.DisposeSFtp()
        return
    }

    //  Normally you would not hard-code the password in source.  You should instead obtain it
    //  from an interactive prompt, environment variable, or a secrets vault.
    password := "mySshPassword"

    success = sftp.AuthenticatePw("mySshLogin",password)
    if success == false {
        fmt.Println(sftp.LastErrorText())
        sftp.DisposeSFtp()
        return
    }

    success = sftp.InitializeSftp()
    if success == false {
        fmt.Println(sftp.LastErrorText())
        sftp.DisposeSFtp()
        return
    }

    //  Open (creating/truncating) the remote file for writing.
    handle := sftp.OpenFile("subdir/image.png","writeOnly","createTruncate")
    if sftp.LastMethodSuccess() == false {
        fmt.Println(sftp.LastErrorText())
        sftp.DisposeSFtp()
        return
    }

    //  Put the bytes to write into a BinData.  (Here they are loaded from a local file, but the
    //  bytes could come from anywhere.)
    bd := chilkat.NewBinData()
    success = bd.LoadFile("qa_data/image.png")
    if success == false {
        fmt.Println(bd.LastErrorText())
        sftp.DisposeSFtp()
        bd.DisposeBinData()
        return
    }

    //  Append the BinData bytes to the open remote file.
    success = sftp.WriteFileBd(*handle,bd)
    if success == false {
        fmt.Println(sftp.LastErrorText())
        sftp.DisposeSFtp()
        bd.DisposeBinData()
        return
    }

    success = sftp.CloseHandle(*handle)
    if success == false {
        fmt.Println(sftp.LastErrorText())
        sftp.DisposeSFtp()
        bd.DisposeBinData()
        return
    }

    fmt.Println("Wrote ", bd.NumBytes(), " bytes.")

    sftp.Disconnect()

    sftp.DisposeSFtp()
    bd.DisposeBinData()