JavaScript

Check if an FTP Listing Entry is a Directory

Demonstrates the Chilkat Ftp2.GetIsDirectory method, which returns whether a cached directory-listing entry is a directory. The only argument is a zero-based index. An invalid index returns false.

Background: Distinguishing directories from files is the first thing most listing code needs — to render a folder tree, to decide whether to recurse, or to apply different handling. This reads the type from the cached listing, so it is a local lookup rather than a server query. Reliability depends on the server's listing format conveying the type, which the common Unix and MLSD formats do.

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.GetIsDirectory method, which returns whether a cached directory-listing
//  entry is a directory.  The only argument is a zero-based index into the current listing.

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;
}

success = ftp.ChangeRemoteDir("public_html");
if (success == false) {
    console.log(ftp.LastErrorText);
    return;
}

//  GetDirCount retrieves the directory listing on the first call and returns the number of
//  entries.  A negative return indicates failure.
var n = ftp.GetDirCount();
if (n < 0) {
    console.log(ftp.LastErrorText);
    return;
}

var i;
for (i = 0; i <= n - 1; i++) {
    var name = ftp.GetFilename(i);
    if (ftp.GetIsDirectory(i)) {
        console.log("[DIR]  " + name);
    }
    else {
        console.log("       " + name);
    }

}

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