JavaScript

Append Bytes to a Remote FTP File (BinData)

Demonstrates the Chilkat Ftp2.AppendFileBd method, which appends the bytes in a BinData to a remote file. The first argument is the remote filename and the second is the BinData. No conversion is performed.

Background: The binary append: add in-memory bytes to the end of a remote file without an intermediate local file and without any encoding or line-ending translation. It is the right choice for growing a binary file — concatenating captured data, for instance — where exact bytes matter.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

var success = false;

//  Demonstrates the Ftp2.AppendFileBd method, which appends the bytes in a BinData to a remote
//  file.  The 1st argument is the remote filename and the 2nd is the BinData.

var ftp = new CkFtp2();

ftp.Hostname = "ftp.example.com";
ftp.Username = "myFtpLogin";

//  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.
ftp.Password = "myPassword";

success = ftp.Connect();
if (success == false) {
    console.log(ftp.LastErrorText);
    return;
}

var bd = new CkBinData();
success = bd.LoadFile("qa_data/more_data.bin");
if (success == false) {
    console.log(bd.LastErrorText);
    return;
}

success = ftp.AppendFileBd("data/collected.bin",bd);
if (success == false) {
    console.log(ftp.LastErrorText);
    return;
}

console.log("Appended " + bd.NumBytes + " bytes.");

success = ftp.Disconnect();
if (success == false) {
    console.log(ftp.LastErrorText);
    return;
}