request請求參數-防盜鏈
阿新 • • 發佈：2018-04-18
request請求參數-防盜鏈java源碼
import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; //防盜鏈[下載文件，必須從指定網站進入，否則不允許下載文件] public class Rdome4 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //取得瀏覽器來自於何方 String referer = request.getHeader("referer"); //取得瀏覽器訪問的URL // String url = request.getRequestURL().toString(); //判段 // if(referer != null && url.equals("http://localhost:8080/day04/index.html")) if(referer!=null && referer.equals("http://localhost:8080/day04/index.html")) { //轉發到download.html頁面 this.getServletContext().getRequestDispatcher("/download.html").forward(request, response); }else { //轉發到ad.html頁面 this.getServletContext().getRequestDispatcher("/ad.html").forward(request, response); } } }
訪問頁面：
<!DOCTYPE html> <html> <head> <title>index.html</title> <meta name="content-type" content="text/html; charset=UTF-8"> <!--<link rel="stylesheet" type="text/css" href="./styles.css">--> </head> <body> <a href="/day04/Rdome4">進入下載頁面</a> </body> </html>
成功後跳轉下載頁面
<!DOCTYPE html> <html> <head> <title>download.html</title> <meta name="keywords" content="keyword1,keyword2,keyword3"> <meta name="description" content="this is my page"> <meta name="content-type" content="text/html; charset=UTF-8"> <!--<link rel="stylesheet" type="text/css" href="./styles.css">--> </head> <body> 這是下載頁面<br> </body> </html>
request請求參數-防盜鏈