Node.js

Delete Local Files that Do Not Exist on the FTP Server

See more FTP Examples

Demonstrates how to get a list of local files in a directory tree that do not exist on the FTP server. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var ftp = new chilkat.Ftp2();

    ftp.Hostname = "ftp.example.com";
    ftp.Username = "login";
    ftp.Password = "password";

    ftp.KeepSessionLog = true;

    //  Connect and login to the FTP server.
    success = ftp.Connect();
    if (success !== true) {
        console.log(ftp.LastErrorText);
        return;
    }

    //  Set the current remote directory to the root of
    //  the remote tree to be compared.
    success = ftp.ChangeRemoteDir("abc123");
    if (success !== true) {
        console.log(ftp.LastErrorText);
        return;
    }

    //  Recursively descend the local directory tree
    //  and find the files that exist locally but not remotely.
    //  These are the files what would be uploaded via
    //  the SyncRemoteTree method call with mode = 1.
    //  (Mode 1 would upload all files that do not exist on the FTP server.)

    //  The actual uploading is avoided by setting the preview-only argument to true.
    var mode = 1;
    var descendTree = true;
    var previewOnly = true;
    success = ftp.SyncRemoteTree2("/temp/abc123",mode,descendTree,previewOnly);
    if (success !== true) {
        console.log(ftp.LastErrorText);
        return;
    }

    //  The files what would've been uploaded are now available in the SyncPreview property,
    //  which contains a list of local file paths, one per line.
    //  A program can iterate over them like this:
    var sa = new chilkat.StringArray();
    sa.LoadFromText(ftp.SyncPreview);

    var fac = new chilkat.FileAccess();

    var numFiles = sa.Count;
    var i = 0;
    var localFilePath;
    while ((i < numFiles)) {
        localFilePath = sa.GetString(i);
        console.log(localFilePath);

        //  An application can delete the file using Chilkat's file access object,
        //  or it can choose to use the native file API available in the programming language:
        success = fac.FileDelete(localFilePath);
        if (success !== true) {
            console.log("Failed to delete: " + localFilePath);
        }

        i = i+1;
    }

    success = ftp.Disconnect();

}

chilkatExample();