(Node.js) FTP Non-Recursive Sync Directory (Download)

See more FTP Examples

Download files from the server that have filenames matchhing a pattern, and don't yet exist in a local directory.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // 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 = "myUsername";
    ftp.Password = "myPassword";
    ftp.Port = 21;
    ftp.AuthTls = true;

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

    // Change to the remote directory where the files are located.
    // This step is only necessary if the files are not in the root directory
    // of the FTP account.
    success = ftp.ChangeRemoteDir("qa");
    if (success !== true) {
        console.log(ftp.LastErrorText);
        return;
    }

    // Indicate that we only want to download files with filenames ending in ".txt"
    ftp.SyncMustMatch = "*.txt";

    // Modes for synchronization are as follows:
    // mode=0: Download all files
    // mode=1: Download all files that do not exist on the local filesystem.
    // mode=2: Download newer or non-existant files.
    // mode=3: Download only newer files. If a file does not already exist on the local filesystem, it is not downloaded from the server.
    // mode=5: Download only missing files or files with size differences.
    // mode=6: Same as mode 5, but also download newer files.
    // mode=99: Do not download files, but instead delete remote files that do not exist locally.
    var mode = 1;

    // Download all files matching "*.txt" from the current remote ftp directory.
    // The files are downloaded into c:/temp/qa_output
    success = ftp.SyncLocalDir("c:/temp/qa_output",mode);
    if (success !== true) {
        console.log(ftp.LastErrorText);
        return;
    }

    // We can see what files were downloaded in the SyncedFiles property,
    // which lists the files one per line.
    console.log(ftp.SyncedFiles);

    // Perhaps we wish to delete the files we just downloaded from the server..
    var sb = new chilkat.StringBuilder();
    sb.Append(ftp.SyncedFiles);

    var st = new chilkat.StringTable();
    st.AppendFromSb(sb);

    var numFiles = st.Count;
    var i = 0;
    var remoteFilename;
    while (i < numFiles) {
        remoteFilename = st.StringAt(i);
        console.log("Deleting " + remoteFilename + " from the FTP server");
        success = ftp.DeleteRemoteFile(remoteFilename);
        if (success !== true) {
            console.log(ftp.LastErrorText);
            return;
        }

        i = i+1;
    }

    success = ftp.Disconnect();

}

chilkatExample();