ServletResponseFilter对HTML加密,保护美工的劳动果实。

王朝java/jsp·作者佚名  2006-01-09
窄屏简体版  字體: |||超大  

Filter类代码如下:

package com.youk.wf.filter;

import javax.servlet.*;

import javax.servlet.http.*;

import java.io.*;

import java.util.*;

import com.youk.util.HtmlEncode;

/**

<p>Title: Btoall</p>

<p>Description: </p>

<p>Copyright: Copyright (c) 2004</p>

<p>Company: Youkone inc Ningbo.</p>

@author victor wu(woowind@sina.com)

@version 1.0

*/

public class HtmlProtectFilter

extends HttpServlet

implements Filter {

private FilterConfig filterConfig;

HtmlEncode encode = new HtmlEncode();

//Handle the passed-in FilterConfig

public void init(FilterConfig filterConfig) throws ServletException {

this.filterConfig = filterConfig;

}

//Process the request/response pair

public void doFilter(ServletRequest request, ServletResponse response,

FilterChain filterChain) {

try {

HttpServletResponse httpResponse = (HttpServletResponse) response;

HttpServletRequest httpRequest = (HttpServletRequest) request;

String path =httpRequest.getRequestURI();

//String mimitype = filterConfig.getServletContext().getMimeType(path);

httpRequest.setCharacterEncoding("GBK");

String ext = ".ww";

if(path.length() > 2){

path = path.substring(path.length()-3,path.length()).toLowerCase();

}

//需要乱序的资源;后2位;

if(!path.equals(ext)){

filterChain.doFilter(httpRequest, response);

}else{

System.out.println("ext="+path);

httpResponse.setContentType("text/html; charset=GBK");

ResponseWrapper wrapper = new ResponseWrapper(

httpResponse);

filterChain.doFilter(httpRequest, wrapper);

}

}

catch (Exception ex) {

ex.printStackTrace();

}

}

/**

*

*/

public void destroy(){

}

/**

*

* <p>Title: SMS</p>

* <p>Description: SMS</p>

* <p>Copyright: Copyright (c) 2003</p>

* <p>Company: Youk Inc.</p>

* @author 吴锋彬(woowind@sina.com

* @version 1.0

*/

public class ResponseWrapper extends HttpServletResponseWrapper {

private PrintWriter printWriter;

private ResponseOutputStream outputStream;

public ResponseWrapper(ServletResponse response) throws

java.io.IOException {

super((HttpServletResponse) response);

outputStream = new ResponseOutputStream

(response.getOutputStream());

printWriter = new PrintWriter(outputStream);

}

public ServletOutputStream getOutputStream() throws

java.io.IOException {

return outputStream;

}

public PrintWriter getWriter() throws java.io.IOException {

return printWriter;

}

}

/**

*

* @param args String[]

*/

public static void main(String[] args){

try{

String cn = "你好";

int h = cn.charAt(0);

String s = new Integer(h).toHexString(h);

//String result = java.net.URLEncoder.encode(,"GBK");

System.out.println(s);

}catch(Exception ex){

ex.printStackTrace();

}

}

public class ResponseOutputStream extends ServletOutputStream {

private OutputStream outputStream;

private ByteArrayOutputStream arrayStream;

private boolean closed = false;

public ResponseOutputStream(OutputStream stream) {

outputStream = stream;

arrayStream = new ByteArrayOutputStream();

}

public void write(int i) throws java.io.IOException {

arrayStream.write(i);

}

public void write(byte[] b)throws java.io.IOException{

arrayStream.write(b);

}

public void write(byte[] b , int a , int bb)throws java.io.IOException{

arrayStream.write(b,a,bb);

}

public void close() throws java.io.IOException {

if (!closed) {

outputStream.close();

closed = true;

}

}

public void flush() throws java.io.IOException {

if (arrayStream.size() != 0) {

if (!closed) {

processStream();

arrayStream = new ByteArrayOutputStream();

}

}

}

private void processStream() throws java.io.IOException {

System.out.println("replace.");

outputStream.write(replaceContent(arrayStream.toByteArray()));

outputStream.flush();

}

byte[] replaceContent(byte[] bytesContent) {

try{

String s = new String(bytesContent, "GBK");

if(s.toLowerCase().indexOf("<html>") != -1){

String encodeHtml = encode.encode(s);

String addS = "<script>s=\"" + encodeHtml + "\";";

String sc = "document.write(unescape(s));</script>";

return (addS+sc).getBytes();

}

}catch(Exception ex){

}

return bytesContent;

}

}

}

weblogic8.1 on red hat / jboss3.2.5 on windows200 测试通过

我的qq:1265877

msn:woowind@sina.com

欢迎和我联系

演示地址:http://www.youkone.com

 
 
 
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