import java.net.*;
import java.io.*;
import java.util.*;

public class HeaderViewer {

  public static void main(String args[]) {

    for (int i=0; i < args.length; i++) {
      try {
        URL u = new URL(args[0]);
        URLConnection uc = u.openConnection();
        System.out.println("Content-type: " + uc.getContentType());
        System.out.println("Content-encoding: " 
         + uc.getContentEncoding());
        System.out.println("Date: " + new Date(uc.getDate()));
        System.out.println("Last modified: " 
         + new Date(uc.getLastModified()));
        System.out.println("Expiration date: " 
         + new Date(uc.getExpiration()));
        System.out.println("Content-length: " + uc.getContentLength());
      }  // end try
      catch (MalformedURLException ex) {
        System.err.println(args[i] + " is not a URL I understand");
      }
      catch (IOException ex) {
        System.err.println(ex);
      }      
      System.out.println(); 
    }  // end for
      
  }  // end main

}  // end HeaderViewer