zz 如何防止圖片盜鏈在tomcat中

最後更新：2018-12-03 來源：互聯網

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網站用的tomcat伺服器，結果裡面的音樂總是被盜鏈，非常鬱悶。尋找了n多資料，使用了n款軟體都沒有用，因為我們的應用比較特殊，總會把不該防的也防了。一怒之下就研究了一下防盜鏈原理，親自寫了一款防盜鏈的過濾器，代碼非常簡單如下：

/**
* @author
* @company
* @time      Dec 18, 2006 2:08:18 PM
* @version   1.0.0.0
* @package   com
*/
package com;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpServletResponse;

/**
* Description ：這個過濾器用來保護內容檔案不被惡意盜鏈
* @author ： okwang
* @version ： 1.0.0 2007-06-08
*
*/
public class DownFilter implements Filter {
/*
* (non-Javadoc)
*
* @see javax.servlet.Filter#destroy()
*/
public void destroy() {
// TODO Auto-generated method stub

}

/*
* (non-Javadoc)
*
* @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest,
*      javax.servlet.ServletResponse, javax.servlet.FilterChain)
*/
public void doFilter(ServletRequest request, ServletResponse response,
   FilterChain chain) throws IOException, ServletException {
// TODO Auto-generated method stub
HttpServletRequest   req   =   (HttpServletRequest)request;
String info=req.getHeader("User-Agent");
if (info != null && !info.equals("contype")) {
   response.setContentType("text/html;charset=UTF-8");
   PrintWriter out = response.getWriter();
   out.println("<html><head></head><body>");
   out.println("<h1>對不起，,您沒有訪問的許可權！");
   out.println("</h1></body></html>");
   out.flush();
   return;
}else
{
     chain.doFilter(request, response);
}
}

/*
*
* @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
*/
public void init(FilterConfig arg0) throws ServletException {
// TODO Auto-generated method stub
}

}

另外還要在工程項目的web.xml裡加上如下語句：

<filter>
<filter-name>DownFilter</filter-name>
<filter-class>com.DownFilter</filter-class>
</filter>

<filter-mapping>
<filter-name>DownFilter</filter-name>
<url-pattern>/upload/up/*</url-pattern>
</filter-mapping>
紅字為所保護的內容檔案夾

本文章原先以中文撰寫並發佈於 aliyun.com，亦設英文版本，僅作資訊用途。本網站不對文章的準確性，完整性或可靠性或其任何翻譯作出任何明示或暗示的陳述或保證。如對該文章有任何疑慮或投訴，請傳送電郵至 info-contact@alibabacloud.com 並提供相關疑慮或投訴的詳細說明。職員會於 5 個工作天內與您聯絡，一經驗證之後，即會刪除該侵權內容。

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zz 如何防止圖片盜鏈在tomcat中

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