Java program that reads websites to download from a file

Sometime back I wrote a simple Java program that reads a list of URLs
from a file and stores their contents on the local file system. I
have no problems with normal (i.e. html) pages, but I am not able to
download asp files. They are stored as zero length files.

I would greatly appreciate if someone could suggest a way out.

-- Bhat

My source code follows:

/////////////////// Source code begin /////////////////////

// This program reads a list of URLs to access and store on the local
// file system from a file. The name of the file is passed as the
// first command line argument. Each URL is on a separate line.
// Lines beginning with the '#' character are treated as blanks and
// are skipped.
//
import java.io.*;
import java.net.*;
import java.security.*;

class WebsiteLoader
{
  public static char replaceChar = '~';

  public static void main(String argv[]) throws IOException
  {
    // The following two lines were suggested by the following
website:
    // http://www.javaworld.com/javaworld/javatips/jw-javatip96.html
    // They help in suppressing the java.net.MalformedURLException
    System.setProperty("java.protocol.handler.pkgs",
                       "com.sun.net.ssl.internal.www.protocol");
    Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());

    BufferedReader br;
    String origName;

    if(argv.length != 0)
    {
      br = new BufferedReader(new FileReader(argv[0]));

      // Read URLs from the file. Skip blank lines and lines
beginning
      // with the '#' character.
      for(;;)
      {
        origName = br.readLine();
        if(origName == null)
          break;

        origName = origName.trim();

        if(origName.length() == 0)
          continue;

        if(origName.charAt(0) == '#')
          continue;

        URL url = new URL(origName);
        if(url == null)
          continue;

        BufferedReader bufRdr = new BufferedReader(new
InputStreamReader(url.openStream()));

        // The name of the file to which the website contents are
written
        // is derived from the URL by substituting the following
characters
        // with some "non-offending" character:
        // \,/,:,*,?,",<,>,|

        String modName = origName;
        modName = modName.replace('\\', replaceChar);
        modName = modName.replace('/', replaceChar);
        modName = modName.replace(':', replaceChar);
        modName = modName.replace('*', replaceChar);
        modName = modName.replace('?', replaceChar);
        modName = modName.replace('"', replaceChar);
        modName = modName.replace('<', replaceChar);
        modName = modName.replace('>', replaceChar);
        modName = modName.replace('|', replaceChar);

        FileWriter fWriter = new FileWriter(modName);

        System.out.println("Writing contents of " + origName + " to "
+
                           "the following file: " + modName);
        for(;;)
        {
          String thisLine = bufRdr.readLine();
          if(thisLine == null)
            break;

          fWriter.write(thisLine);
        }
      }
    }
  }
}