have done a by-no-means-robust tag that works
import java.io.*;
import java.net.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.TagSupport;
/**
* Output the tag body when a URL resource exists.
*
* @author allistairc
*/
public class URLExistsTag extends TagSupport {
/** URL */
private String url;
/** Eval at end of tag */
public int doStartTag() throws JspException {
return doWork();
}
/**
* Load the page attributes and attempt to output the specified key
*/
public int doWork() throws JspException {
try {
URL url2 = new URL(url);
URLConnection urlConnection = (HttpURLConnection)
url2.openConnection();
urlConnection.setRequestProperty("method", "head");
urlConnection.setDoInput(true);
urlConnection.connect();
// throws file not found exception when url does not exist
BufferedInputStream bis = new
BufferedInputStream(urlConnection.getInputStream());
return EVAL_BODY_INCLUDE;
} catch (Exception e) {
}
return SKIP_BODY;
}
/**
* Set the URL
* @param url
*/
public void setUrl(String url) {
this.url = url;
}
/**
* Get the URL
* @return
*/
public String getUrl() {
return this.url;
}
}
-----Original Message-----
From: Allistair Crossley
Sent: 25 May 2004 14:52
To: Tag Libraries Users List
Subject: RE: 1.1 / 1.0 Crossover
:)) thanks! It all works perfectly :))
-----Original Message-----
From: Kris Schneider [mailto:[EMAIL PROTECTED]
Sent: 25 May 2004 14:41
To: Tag Libraries Users List
Subject: Re: 1.1 / 1.0 Crossover
Remove the TLD files from WEB-INF.
Remove the <taglib> elements from web.xml.
Use a Servlet 2.4 web.xml:
<web-app xmlns="http://java.sun.com/xml/ns/j2ee";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd";
version="2.4">
...
</web-app>
Use the "well known" URIs in taglib directives:
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"; %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"; %>
Quoting Allistair Crossley <[EMAIL PROTECTED]>:
> Hi Guys
>
> I have just discovered something odd. My web.xml contains the following:
>
> <taglib>
> <taglib-uri>http://java.sun.com/jsp/jstl/core</taglib-uri>
> <taglib-location>/WEB-INF/tld/c.tld</taglib-location>
> </taglib>
>
> <taglib>
> <taglib-uri>http://java.sun.com/jsp/jstl/fmt</taglib-uri>
> <taglib-location>/WEB-INF/tld/fmt.tld</taglib-location>
> </taglib>
>
> <taglib>
> <taglib-uri>http://java.sun.com/jsp/jstl/sql</taglib-uri>
> <taglib-location>/WEB-INF/tld/sql.tld</taglib-location>
> </taglib>
>
> <taglib>
> <taglib-uri>http://java.sun.com/jsp/jstl/xml</taglib-uri>
> <taglib-location>/WEB-INF/tld/x.tld</taglib-location>
> </taglib>
>
> <taglib>
> <taglib-uri>http://java.sun.com/jsp/jstl/functions</taglib-uri>
> <taglib-location>/WEB-INF/tld/fn.tld</taglib-location>
> </taglib>
>
> When I run the following JSP
>
> <%@ taglib uri="http://java.sun.com/jsp/jstl/core"; prefix="c" %>
>
> <c:set var="s1" value="There is a castle on a cloud"/>
> <c:out value="${s1}" />
>
> The value that prints to the screen is
>
> ${s1}
>
> When I change to
>
> <%@ taglib uri="http://java.sun.com/jstl/core"; prefix="c" %>
>
> There is a castle on a cloud
>
> is printed ok.
>
> I cannot get either of these to work at all...
>
> <%@ taglib uri="http://java.sun.com/jsp/jstl/functions"; prefix="fn" %>
> <%@ taglib uri="http://java.sun.com/jstl/functions"; prefix="fn" %>
>
> I have all the TLDs and the 2 JARs installed on my webapp.
>
> I am very confused about what is happening here.
>
>
>
> <FONT SIZE=1 FACE="VERDANA,ARIAL" COLOR=BLUE>
> -------------------------------------------------------
> QAS Ltd.
> Developers of QuickAddress Software
> <a href="http://www.qas.com";>www.qas.com</a>
> Registered in England: No 2582055
> Registered in Australia: No 082 851 474
> -------------------------------------------------------
> </FONT>
--
Kris Schneider <mailto:[EMAIL PROTECTED]>
D.O.Tech <http://www.dotech.com/>
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
