(JavaScript) 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.

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.

var success = false;

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

var ftp = new CkFtp2();

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

// Connect and login to the FTP server.
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();