Program:-
Index.html:-
<!DOCTYPE html>
<html>
<head>
<title>Get Client Info</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<form method="post" action="info">
<input type="submit" value="GetClientInfo">
</form>
</body>
</html>
Web.xml:-
<servlet>
<servlet-name>InfoServlet</servlet-name>
<servlet-class>ClientInfo</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>InfoServlet</servlet-name>
<url-pattern>/info</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
</web-app>
ClientInfo.java:-
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ClientInfo extends HttpServlet
{
protected void doPost(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException
{
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try
{
int serverPortNumber = request.getServerPort();
out.println("<h3>Server Port Number>"+serverPortNumber+"</h3>");
String protocol = request.getProtocol();
out.println("<h3>Protocol>"+protocol+"</h3>");
}
finally
{
out.close();
}
}
}
Output:-
After Clicking on getClientInfo Button
