JavaScript

Append a Local File to a Remote FTP File

Demonstrates the Chilkat Ftp2.AppendFile method, which appends the contents of a local file to a remote file. The first argument is the local file path and the second is the remote file path. It uses the FTP APPE command.

Note: The local paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: Unlike PutFile, which replaces the remote file, APPE adds to the end of it — the natural fit for accumulating log data or assembling a file from parts. On a server with normal APPE behavior a missing remote file is created; however, APPE support and exact semantics vary by server, so verify against yours if it is critical.

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.AppendFile method, which appends the contents of a local file to a remote
//  file.  The 1st argument is the local file path and the 2nd is the remote file path.

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;
}

//  Uses the FTP APPE command.  On a server with normal APPE behavior, a missing remote file is
//  created; otherwise the local bytes are appended to the end of the existing remote file.
success = ftp.AppendFile("qa_data/today.log","logs/app.log");
if (success == false) {
    console.log(ftp.LastErrorText);
    return;
}

console.log("Appended to the remote file.");

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