How to show the requested URL in a JSP error page?

In the error page I would like to display the URL what the user requested.

In my web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="http://java.sun.com/xml/ns/javaee"
        xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
        xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                            http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
        id="WebApp_ID"
        version="3.0">

    <display-name>MyStuff</display-name>

    <error-page>
        <error-code>404</error-code>
        <location>/WEB-INF/error-404.jsp</location>
    </error-page>

</web-app>

This will forward to error-404.jsp, and here is the content of that file:

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
    "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <title>Page Not found</title>
</head>
<body>
    <p align="center">
    <%
        out.println("Requested resource: " + request.getRequestURL()+ " not found");
    %>
</body>
</html>

The problem it is the request.getRequestURL() need to be changed, but don't know the keyword for what to search.

When I start the browser for http://localhost:8080/MyStuff then I get the following error:

Requested resource: http://localhost:8080/MyStuff/WEB-INF/error-404.jsp not found

How to solve this?

<%@ page language="java" isErrorPage="true" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <title>Error page</title> <meta charset="utf-8"> </head> <body> <button onclick="history.back()">Back to Previous Page</button> <h1>404 Page Not Found.</h1> <br /> <p><b>Error code:</b> ${pageContext.errorData.statusCode}</p> <p><b>Request URI:</b> ${pageContext.request.scheme}://${header.host}${pageContext.errorData.requestURI}</p> <br /> </body> </html>

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