PageSaver

import javax.swing.text.*;
import javax.swing.text.html.*;
import javax.swing.text.html.parser.*;
import java.io.*;
import java.net.*;
import java.util.*;

public class PageSaver extends HTMLEditorKit.ParserCallback {

  private Writer out;
  private URL base;
  
  public PageSaver(Writer out, URL base) {
    this.out = out;
    this.base = base;
  }

  public void handleStartTag(HTML.Tag tag, 
   MutableAttributeSet attributes, int position) {
    try {  
      out.write("<" + tag);
      this.writeAttributes(attributes);
      // for the <APPLET> tag we may have to add a codebase attribute
      if (tag == HTML.Tag.APPLET 
       && attributes.getAttribute(HTML.Attribute.CODEBASE) == null) {
        String codebase = base.toString();
        if (codebase.endsWith(".htm") || codebase.endsWith(".html")) {
          codebase = codebase.substring(0, codebase.lastIndexOf('/'));   
        }
        out.write(" codebase=\"" + codebase + "\""); 
      }
      out.write(">");
      out.flush();
    }
    catch (IOException e) {
      System.err.println(e);
      e.printStackTrace();
    }
  }
  
  public void handleEndTag(HTML.Tag tag, int position) {
    try {    
      out.write("</" + tag + ">");
      out.flush();
    }
    catch (IOException e) {
      System.err.println(e);
    }
  }
  
  private void writeAttributes(AttributeSet attributes) 
   throws IOException {
    
    Enumeration e = attributes.getAttributeNames();
    while (e.hasMoreElements()) {
      Object name = e.nextElement();
      String value = (String) attributes.getAttribute(name);
      try {
        if (name == HTML.Attribute.HREF || name == HTML.Attribute.SRC 
         || name == HTML.Attribute.LOWSRC 
         || name == HTML.Attribute.CODEBASE ) {
          URL u = new URL(base, value);
          out.write(" " + name + "=\"" + u + "\"");              
        }
        else {
          out.write(" " + name + "=\"" + value + "\"");
        }
      }
      catch (MalformedURLException ex) {
        System.err.println(ex);
        System.err.println(base);
        System.err.println(value);
        ex.printStackTrace();
      }
    }
  }
  
  public void handleComment(char[] text, int position) { 
    
    try {
      out.write("<!-- ");
      out.write(text);
      out.write(" -->");
      out.flush();
    }
    catch (IOException e) {
      System.err.println(e);
    }
    
  }
  
  public void handleText(char[] text, int position) { 
    
    try { 
      out.write(text);
      out.flush();
    }
    catch (IOException e) {
      System.err.println(e);
      e.printStackTrace();
    }
    
  }
  
  public void handleSimpleTag(HTML.Tag tag, 
   MutableAttributeSet attributes, int position) {
    try {
      out.write("<" + tag);
      this.writeAttributes(attributes);
      out.write(">");
    }
    catch (IOException e) {
      System.err.println(e);
      e.printStackTrace();
    }
  }

  public static void main(String[] args) { 
    
    for (int i = 0; i < args.length; i++) { 
      
      ParserGetter kit = new ParserGetter();
      HTMLEditorKit.Parser parser = kit.getParser();
    
      try {
        URL u = new URL(args[i]);
        InputStream in = u.openStream();
        InputStreamReader r = new InputStreamReader(in);
        String remoteFileName = u.getFile();
        if (remoteFileName.endsWith("/")) {
          remoteFileName += "index.html";
        }
        if (remoteFileName.startsWith("/")) {
          remoteFileName = remoteFileName.substring(1);
        }
        File localDirectory = new File(u.getHost());
        while (remoteFileName.indexOf('/') > -1) {
          String part = remoteFileName.substring(0, remoteFileName.indexOf('/'));
          remoteFileName = remoteFileName.substring(remoteFileName.indexOf('/')+1);
          localDirectory = new File(localDirectory, part);
        }
        if (localDirectory.mkdirs()) {
          File output = new File(localDirectory, remoteFileName);
          FileWriter out = new FileWriter(output);
          HTMLEditorKit.ParserCallback callback = new PageSaver(out, u);
          parser.parse(r, callback, false);
        }
      }
      catch (IOException e) {
        System.err.println(e); 
        e.printStackTrace();
      }
      
    } 
    
  }
  
}