Get Size of Download using HTTP HEAD

Get the size of a download using an HTTP HEAD request.

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[])
  {
    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;
    }

    CkHttpResponse resp;

    resp = http.GetHead("http://www.chilkatsoft.com/download/ChilkatDotNet2.msi");
    if (resp == null ) {
        System.out.println(http.lastErrorText());
    }
    else {
        String sizeStr;
        sizeStr = resp.getHeaderField("Content-Length");
        if (sizeStr == null ) {
            System.out.println("No content-length header field");
        }
        else {
            //  Show the size of the file.
            //  You may convert the size string to an integer...
            System.out.println(sizeStr);
        }

    }


  }
}