Automatically Determine FTP Proxy Method

Tries each of the five possible ProxyMethod settings and returns the value (1-5) of the ProxyMethod that succeeded.

Download Chilkat Java Library

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    CkFtp2 ftp = new CkFtp2();

    boolean success;

    //  Any string unlocks the component for the 1st 30-days.
    success = ftp.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        System.out.println(ftp.lastErrorText());
        return;
    }

    ftp.put_Hostname("www.example-code.com");
    ftp.put_Username("example-code.com");
    ftp.put_Password("****");

    ftp.put_ProxyHostname("ftp.myproxyhost.com");
    ftp.put_ProxyPort(21);
    //  Note: Your FTP Proxy server may or may not require authentication.
    ftp.put_ProxyUsername("myProxyUsername");
    ftp.put_ProxyPassword("myProxyPassword");

    //  The ProxyMethod should be an integer value between 1 and 5.
    //  If you know your FTP proxy server's authentication scheme,
    //  you may set it directly.  To determine the ProxyMethod,
    //  call DetermineProxyMethod.  A return value of -1 indicates a failure.
    //  A return value of 0 indicates that nothing worked.
    //  A return value of 1-5 indicates the ProxyMethod that was
    //  successful, and this should be the value used for the ProxyMethod
    //  property.

    int pMethod;
    pMethod = (int) ftp.DetermineProxyMethod();
    System.out.println(pMethod);

    ftp.Disconnect();
  }
}