Snooping the server

In this program we are going to tell you how can a use servlet to display information about its server.

Firstly we will create a class in which there will be doGet() method which takes two objects as arguments, first is request object and the second one is of response.

To display the name of the server you are using use the method getServerName() of the ServletRequest interface. To display the server port number use the method getServerPort(). You can also use other methods of the ServletRequest interface like getProtocol() to display the protocol you are using and many more methods depending on your needs.

The code of the program is given below:


import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;



public class SnoopingServerServlet extends HttpServlet{

  protected void doGet(HttpServletRequest request, HttpServletResponse

    response) throws ServletException, IOException {

  PrintWriter pw = response.getWriter();

  pw.println("The server name is " + request.getServerName()+"<br>");

  pw.println("The server port number is " + request.getServerPort()+

    "<br>");

  pw.println("The protocol is " + request.getProtocol()+ "<br>");

  pw.println("The scheme used is " + request.getScheme());

  }

}

web.xml file for this program:


<?xml version="1.0" encoding="ISO-8859-1"?>

<!--<!DOCTYPE web-app

 PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

 "http://java.sun.com/dtd/web-app_2_3.dtd"> -->



<web-app>

 <servlet>

  <servlet-name>Hello</servlet-name>

  <servlet-class>SnoopingServerServlet</servlet-class>

 </servlet>

 <servlet-mapping>

 <servlet-name>Hello</servlet-name>

 <url-pattern>/SnoopingServerServlet</url-pattern>

 </servlet-mapping>

</web-app>

The output of the program is given below:

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Snooping the server

Snooping the server

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Snooping the server