import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
// File: EchoEnvironmentServlet.java
// Listing 2
//
/**
* This servlet displays the CGI environment variables in a web page.
*
* @author Chad (shod) Darby, darby@j-nine.com
* @version 3.41, 2 Nov 1997
*
*/
public class EchoEnvironmentServlet extends HttpServlet
{
public void service(HttpServletRequest request, HttpServletResponse response)
throws IOException
{
String replyPage = null;
// Build the header for HTML page
//
replyPage = "Echo Environment Variables";
replyPage += "";
// Echo the environment variables
//
replyPage += " Environment Variables
";
replyPage += " Server Name: " + request.getServerName();
replyPage += "
Server Port: " + request.getServerPort();
replyPage += "
Server Protocol: " + request.getProtocol();
replyPage += "
Servlet Name: " + request.getServletPath();
replyPage += "
Method: " + request.getMethod();
replyPage += "
Path Info: " + request.getPathInfo();
replyPage += "
Path Translated: " + request.getPathTranslated();
replyPage += "
Query String: " + request.getQueryString();
replyPage += "
Request URI: " + request.getRequestURI();
replyPage += "
Remote Host: " + request.getRemoteHost();
replyPage += "
Remote Addr: " + request.getRemoteAddr();
replyPage += "
Remote User: " + request.getRemoteUser();
replyPage += "
Authorization Type: " + request.getAuthType();
replyPage += "
Content Type: " + request.getContentType();
replyPage += "
Content Length: " + request.getContentLength();
replyPage += "
";
// Just for kicks, let's loop thru and get the header info using an enumeration
//
replyPage += " Request Header Information
";
Enumeration e = request.getHeaderNames();
String name;
while (e.hasMoreElements())
{
name = (String) e.nextElement();
replyPage += "" + name + ": " + request.getHeader(name);
}
replyPage += "
";
// Build bottom of HTML page
//
replyPage += " ";
// Set the content-type for the response header
// note: no need for extra carriage returns!
//
response.setContentType("text/html");
// finally, send this formatted HTML page back to the client
//
PrintStream out = new PrintStream(response.getOutputStream());
out.println(replyPage);
out.close();
}
public String getServletInfo()
{
return "Echo Form Servlet, Chad (shod) Darby, 2 Nov 1997, www.j-nine.com";
}
}