filterwres.java~

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/* 
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
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 *
 * GenericFilter.java
 *
 * Created on February 28, 2001, 4:19 PM
 */

package webtests.filters;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.ServletException;
import java.io.*;
import java.util.Date;
import java.awt.*;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import java.awt.image.BufferedImage;

/**
 *
 * @author Jian (James) Cai
 * @version 0.1 ejb
 */
public class FilterWRES extends GenericFilter
{

    public FilterWRES () {
        log("FilterWRES initialized");
    }

    public void doFilter(final ServletRequest request, final ServletResponse response, FilterChain chain) throws java.io.IOException,
    javax.servlet.ServletException
    {
	String message = "Filtered !";
	GenericResponseWrapper wrapper = new GenericResponseWrapper((HttpServletResponse)response);
	chain.doFilter(request, wrapper);
	OutputStream out = response.getOutputStream();
	//message = getFilterConfig().getInitParameter("message");

	ByteArrayOutputStream respStream = manipulateResp(wrapper.output());
	response.setContentLength(respStream.size());
	response.setContentType("text/html");
	out.write(respStream.toByteArray());

	out.flush();
	out.close();
    }
    
    public ByteArrayOutputStream manipulateResp(byte[] respData) throws ServletException
    {
	//change every character in the response to higher case

	int i;
	int o;
	char a='a';
	char A='A';
	int diff = A-a;
	ByteArrayInputStream readStream;
	ByteArrayOutputStream respStream;
	respStream = new ByteArrayOutputStream();
	
	try{
	readStream = new ByteArrayInputStream(respData);
	
	do {
	    i = readStream.read();
	   
	    //log("get char:"+((char) i));
	    //log("FilterWRES 125: read readStream");
	    if (i != -1) 
		{
		    if ( (((char) i)>='a')&&(((char) i)<='z') )
			{
			    o= i+diff;
			    respStream.write(o);
			}
		    else
			{
			    respStream.write(i);
			}
		}
	} while (i != -1);
	
	readStream.close();
	
	}
	catch (IOException e)
	    {
		System.out.println("IOExcption:" + e);
	    }

	return respStream;
    }
}