# DebugExample.jsp Page that uses the DebugTag custom tag
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!--
Illustration of SimplePrimeTag tag.
Taken from Core Web Programming Java 2 Edition
from Prentice Hall and Sun Microsystems Press,
.
May be freely used or adapted.
-->
<HTML>
<HEAD>
<TITLE>Using the Debug Tag</TITLE>
<LINK REL=STYLESHEET
HREF="JSP-Styles.css"
TYPE="text/css">
</HEAD>
<BODY>
<H1>Using the Debug Tag</H1>
<%@ taglib uri="cwp-taglib.tld" prefix="cwp" %>
Top of regular page. Blah, blah, blah. Yadda, yadda, yadda.
<P>
<cwp:debug>
<B>Debug:</B>
<UL>
<LI>Current time: <%= new java.util.Date() %>
<LI>Requesting hostname: <%= request.getRemoteHost() %>
<LI>Session ID: <%= session.getId() %>
</UL>
</cwp:debug>
<P>
Bottom of regular page. Blah, blah, blah. Yadda, yadda, yadda.
</BODY>
</HTML>
package cwp.tags;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.*;
import javax.servlet.*;
/** A tag that includes the body content only if
* the "debug" request parameter is set.
* <P>
* Taken from Core Web Programming Java 2 Edition
* from Prentice Hall and Sun Microsystems Press,
* .
* May be freely used or adapted.
*/
public class DebugTag extends TagSupport {
public int doStartTag() {
ServletRequest request = pageContext.getRequest();
String debugFlag = request.getParameter("debug");
if ((debugFlag != null) &&
(!debugFlag.equalsIgnoreCase("false"))) {
return(EVAL_BODY_INCLUDE);
} else {
return(SKIP_BODY);
}
}
}
Aug 28