Check File Size using HEAD Request

Demonstrates how to quickly check the size of an HTTP download by using the HEAD request.

 Chilkat Java Library Downloads for Windows, Linux, and MAC OS X

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[])
  {
    CkHttp http = new CkHttp();

    boolean success;

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

    //  Send a HEAD request to get the response header:
    CkHttpResponse response;
    response = http.GetHead("http://www.chilkatsoft.com/download/ChilkatDotNet2.msi");

    if (response == null ) {
        System.out.println(http.lastErrorText());
    }
    else {

        //  The ContentLength property of the HTTP response is
        //  the size of the remote file:
        System.out.println("Size of download = "
             + response.get_ContentLength());

    }

  }
}