Node.js

File Existence Check

See more FTP Examples

Testing to see if a file exists on the FTP server. The GetSizeByName method is a convenient way to check if a file exists. It will return -1 if the file does not exist, otherwise it returns the size of the file in bytes. 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 = "username";
    ftp.Password = "password";

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

    //  Set the current remote directory to where the file is located:
    success = ftp.ChangeRemoteDir("something");
    if (success !== true) {
        console.log(ftp.LastErrorText);
        return;
    }

    //  Test to see if the file exists by getting the file size by name. 
    //  If a -1 is returned, the file does not exist.
    var fileSize = ftp.GetSizeByName("test123.txt");
    if (fileSize < 0) {
        console.log("file does not exist");
    }
    else {
        console.log("file exists and is " + fileSize + " bytes in size");
    }

    success = ftp.Disconnect();

}

chilkatExample();