(Node.js) Directory Existence Check

How to test if a directory exists on an FTP server.

A good way to check to see if a directory already exists is to try to "cd" to that remote directory by calling ChangeRemoteDir. If it succeeds, then the directory exists. If not, then it does not exist. An alternative method is to set the ListPattern = "*" and then iterate over the files/directories, looking for the 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 = "login";
    ftp.Password = "password";

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

    // Does the "temp" directory exist?
    var dirExists;
    dirExists = ftp.ChangeRemoteDir("/temp");
    if (dirExists == true) {
        console.log("Yes, the temp directory exists.");
        //  Yes, it exists. Restore the current remote dir:
        success = ftp.ChangeRemoteDir("..");
        if (success !== true) {
            console.log(ftp.LastErrorText);
            return;
        }

    }

    // Alternatively, you may set the ListPattern = "*" and 
    //  look for the directory:
    ftp.ListPattern = "*";

    var i;
    var n;
    n = ftp.GetDirCount();
    if (n < 0) {
        // Failed to get directory listing based on ListPattern
        console.log(ftp.LastErrorText);
        return;
    }

    if (n > 0) {
        for (i = 0; i <= n - 1; i++) {
            var isDir;
            isDir = ftp.GetIsDirectory(i);
            if (isDir == true) {
                var fname;
                fname = ftp.GetFilename(i);
                if (fname == "temp") {
                    console.log("Found temp directory!");
                    success = ftp.Disconnect();
                    return;
                }

            }

        }

    }

    success = ftp.Disconnect();

}

chilkatExample();