Java

File Existence Check

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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. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Ftp2;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Ftp2 ftp = new Ftp2();

        ftp.setHostname("ftp.example.com");
        ftp.setUsername("username");
        ftp.setPassword("password");

        // Connect and login to the FTP server.
        try {
            ftp.connect();

            // Set the current remote directory to where the file is located:
            ftp.changeRemoteDir("something");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            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.
        int fileSize = ftp.getSizeByName("test123.txt");
        if (fileSize < 0) {
            System.out.println("file does not exist");
        } else {
            System.out.println("file exists and is " + fileSize + " bytes in size");
        }

        ftp.disconnect();
    }
}