A jsp that can be used as an error jsp (maped as location for an error-page tag in web.xml)
lists all known request attribs etc.
<%@ page isErrorPage="true" %>
<%@ page language="java" %>
<%@ page import="java.util.*" %>
<%
Object statusCode = request.getAttribute("javax.servlet.error.status_code");
Object exceptionType = request.getAttribute("javax.servlet.error.exception_type");
Object message = request.getAttribute("javax.servlet.error.message");
%>
<html>
<head>
<title>Error Page</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body bgcolor="#FFFFFF">
<P><A href="<%=response.encodeURL(request.getContextPath()) %>">Home</A></P>
<hr>
<H2>An Error has occured:</H2>
<TABLE CELLPADDING="2" CELLSPACING="2" BORDER="1" WIDTH="100%">
<TR>
<TD WIDTH="20%"><B>Status Code</B></TD>
<TD WIDTH="80%"><%= statusCode %></TD>
</TR>
<TR>
<TD WIDTH="20%"><B>Exception Type</B></TD>
<TD WIDTH="80%"><%= exceptionType %></TD>
</TR>
<TR>
<TD WIDTH="20%"><B>Message</B></TD>
<TD WIDTH="80%"><%= message %></TD>
</TR>
<TR>
<TD WIDTH="20%"><B>Exception</B></TD>
<TD WIDTH="80%">
<%
if( exception != null )
{
out.print("<PRE>");
exception.printStackTrace(new PrintWriter(out));
out.print("</PRE>");
}
%>
</TD>
</TR>
<TR>
<TD WIDTH="20%"><B>Root Cause</B></TD>
<TD>
<%
if( (exception != null) && (exception instanceof ServletException) )
{
Throwable cause = ((ServletException)exception).getRootCause();
if( cause != null )
{
out.print("<PRE>");
cause.printStackTrace(new PrintWriter(out));
out.print("</PRE>");
}
}
%>
</TD>
</TR>
</TABLE>
<hr>
Header List
<table border=3>
<tr>
<td>Name</td>
<td>Value</td>
</tr>
<%
String name = "";
String value = "";
java.util.Enumeration headers = request.getHeaderNames();
while(headers.hasMoreElements())
{
name = (String) headers.nextElement();
value = request.getHeader(name);
%>
<tr>
<td><%=name%></td>
<td><%=value%></td>
</tr>
<%
}
%>
</table>
Attribute List
<!-- "javax.servlet.jsp.jspException" for getting an Exception -->
<table border=3>
<%
java.util.Enumeration attributes = request.getAttributeNames();
while(attributes.hasMoreElements())
{
name = (String) attributes.nextElement();
if (request.getAttribute(name) == null)
{
value = "null";
}
else
{
value = request.getAttribute(name).toString();
}
%>
<tr>
<td><%=name%></td>
<td><%=value%></td>
</tr>
<%
}
%>
</table>
</body>
</html>
--mholzner
© 2008 Novell, Inc. All Rights Reserved.
