OK, I am arround to do an RSS.
Does RSS always have one image per channel?
How do I find available RSS feeds? Moreover?
If I can get a stupid servlet to do a simple Read
Vic
Ted Husted wrote:
There's a menu package here
http://husted.com/about/struts/resources.htm#extensions
that you might like to use.
I'm working on some routines for RSS Content Syndication that use the
RSS Digester. It's not difficult. You just get a bean from the Digester
and pass it to the view. Here's a sample Action:
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.portlet.PortletDataHashMap;
import org.apache.commons.digester.rss.RSSDigester;
import org.apache.commons.digester.rss.Channel;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionServlet;
/**
* Read and parse RSS file found at a given
* path, save the Channel bean in request scope,
* and forward to continue.
* @expects path={uri} on command line or as parameter property to
ActionMapping.
* @expects an input page or error forwarding if exception digesting RSS
* @author Ted Husted
* @version $Revision:1.1 $ $Date: 2000/09/05 $
*/
public final class Fetch extends Action {
// -
Instances Variables
// - Public
Methods
/**
* Request attribute key for saving Channel bean
*/
public static final String CHANNEL_KEY = CHANNEL;
/**
* Main process of class. Reads, parses
*/
public ActionForward perform(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {
ActionErrors errors = new ActionErrors();
Channel channel = null;
String path = request.getParameter(path);
if (path==null) path = mapping.getParameter();
try {
RSSDigester digester = new RSSDigester();
channel = (Channel) digester.parse(path);
}
catch (Throwable t) {
errors.add(ActionErrors.GLOBAL_ERROR,
new ActionError(rss.access.error));
servlet.log(t.toString());
}
// -- Handle Errors ---
if (!errors.empty()) {
saveErrors(request, errors);
if (mapping.getInput()!=null)
return (new ActionForward(mapping.getInput()));
// If no input page, use error forwarding
return (mapping.findForward(error));
}
// -- Save Bean, and Continue ---
request.setAttribute(CHANNEL_KEY,channel);
return (mapping.findForward(continue));
} // End perform
} // End Fetch
I'm about to upload a patch to the Digester that adds an getItems()
access to the Channel bean, which makes it sweet to use with bean:write.
On the view side, you just need to do something like:
%--
/**
* Summarize channel as unadorned HTML.
* @parameters Channel CHANNEL
* @author Ted Husted
* @version $Revision: 1.1 $ $Date: 2001/09/06 $
*/
--%
%@ page language=java %
%@ taglib uri=/tags/struts-bean prefix=bean %
%@ taglib uri=/tags/struts-logic prefix=logic %
html:html/
HEAD
TITLEbean:write name=CHANNEL property=title//TITLE
META http-equiv=Content-Type content=text/html; charset=iso-8859-1
html:base/
/HEAD
BODY
TABLE cellspacing=2 cellpadding=4 width=90% align=center
TR
TDlogic:present name=CHANNEL property=imageimg src=bean:write
name=CHANNEL property=image.URL//logic:present/TD
TD width=100%a href=bean:write name=CHANNEL property=link/
bean:write name=CHANNEL property=title//a/TD
/TR
TD colspan=2bean:write name=CHANNEL property=description//TD
/TR
/TABLE
logic:iterate name=CHANNEL property=items id=ITEM
HR width=90%
TABLE cellspacing=2 cellpadding=4 width=90% align=center
TR
TDh4bean:write name=ITEM property=title//h4/TD
/TR
TR
TDbean:write name=ITEM property=description//TD
/TR
TR
TD align=right... a href=bean:write name=ITEM
property=link/more/a/TD
/TR
/TABLE
/logic:iterate
HR width=90%
/BODY
/HTML
This uses the updates version of Struts-digester from the Commons, that
I just committed, and that should be in tomorrow's snapshot
http://jakarta.apache.org/builds/jakarta-commons/nightly/commons-digester/
.
But, this is not something that needs to be the framework, just in some
sample applications. Cedric or I will probably add a RSS example to the
Tiles tutorial.
Ditto for PDF. All you need is something that would return the PDF via
the Response, and then return
