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package net.sf.flock.webapp;
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import java.io.IOException;
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import java.io.OutputStreamWriter;
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import java.io.PrintWriter;
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import java.util.Collection;
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import javax.servlet.ServletConfig;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import net.sf.flock.FilterI;
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import net.sf.flock.FlockResourceException;
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import net.sf.flock.SubscriptionManagerI;
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import net.sf.flock.filter.Limit;
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import net.sf.flock.filter.MetaStartsWith;
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import net.sf.flock.filter.SortByDate;
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import net.sf.flock.support.Rss091Export;
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import net.sf.flock.support.StylesheetExportFilter;
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import org.jdom.Document;
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import org.jdom.output.XMLOutputter;
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/**
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* @version $Revision: 1.19 $
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* @author $Author: phraktle $
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*/
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public class FlockServlet extends HttpServlet {
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private final static int MAX_ARTICLES = 20;
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private String defaultStylesheet;
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public void init(ServletConfig config) throws ServletException {
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super.init(config);
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this.defaultStylesheet = config.getInitParameter("defaultStylesheet");
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}
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public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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doPost(request, response);
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}
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public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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//System.out.println("pathInfo: "+request.getPathInfo());
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//System.out.println("servletPath: "+request.getServletPath());
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String path = request.getPathInfo();
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if (path==null) {
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path = "/";
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} else if (!path.startsWith("/")) {
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path += "/";
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}
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String stylesheet = request.getParameter("stylesheet");
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if (stylesheet==null) {
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stylesheet = this.defaultStylesheet;
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}
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//stylesheet = request.getContextPath() + '/' + stylesheet;
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ServletContext ctx = this.getServletContext();
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FlockContext.setSubscriptionManager( (SubscriptionManagerI) ctx.getAttribute("flock.subscriptionManager") );
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Collection aggregate;
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try {
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aggregate = FlockContext.getSubscriptionManager().findItems( new FilterI[] {
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new MetaStartsWith("path", path),
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new SortByDate(),
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new Limit(MAX_ARTICLES),
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});
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} catch (FlockResourceException e) {
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throw new ServletException(e);
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}
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if (aggregate==null) {
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response.sendError(HttpServletResponse.SC_NOT_FOUND);
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}
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Document doc = new StylesheetExportFilter( stylesheet ).filter( new Rss091Export().export(path, aggregate) );
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response.setContentType("text/xml; charset=UTF-8");
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XMLOutputter outputter = new XMLOutputter(" ", true);
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PrintWriter out = new PrintWriter( new OutputStreamWriter(response.getOutputStream(), "UTF8"), true );
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outputter.output(doc, out);
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}
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}
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