Mercurial Hosting > luan

//
//  ========================================================================
//  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.server.handler;

import java.io.IOException;
import java.io.OutputStream;
import java.net.URL;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletResponse;

import org.eclipse.jetty.http.HttpHeaders;
import org.eclipse.jetty.http.HttpMethods;
import org.eclipse.jetty.http.MimeTypes;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.util.ByteArrayISO8859Writer;
import org.eclipse.jetty.util.IO;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.eclipse.jetty.util.resource.Resource;


/* ------------------------------------------------------------ */
/** Default Handler.
 *
 * This handle will deal with unhandled requests in the server.
 * For requests for favicon.ico, the Jetty icon is served.
 * For reqests to '/' a 404 with a list of known contexts is served.
 * For all other requests a normal 404 is served.
 * TODO Implement OPTIONS and TRACE methods for the server.
 *
 *
 * @org.apache.xbean.XBean
 */
public class DefaultHandler extends AbstractHandler
{
	private static final Logger LOG = LoggerFactory.getLogger(DefaultHandler.class);

	boolean _showContexts=true;

	@Override
	public void handle(String target, Request request, HttpServletResponse response) throws IOException, ServletException
	{
		if (response.isCommitted() || request.isHandled())
			return;

		request.setHandled(true);

		String method=request.getMethod();

		if (!method.equals(HttpMethods.GET) || !request.getRequestURI().equals("/"))
		{
			response.sendError(HttpServletResponse.SC_NOT_FOUND);
			return;
		}

		response.setStatus(HttpServletResponse.SC_NOT_FOUND);
		response.setContentType(MimeTypes.TEXT_HTML);

		ByteArrayISO8859Writer writer = new ByteArrayISO8859Writer(1500);

		writer.write("<HTML>\n<HEAD>\n<TITLE>Error 404 - Not Found");
		writer.write("</TITLE>\n<BODY>\n<H2>Error 404 - Not Found.</H2>\n");
		writer.write("No context on this server matched or handled this request.<BR>");

		if (_showContexts)
		{
			writer.write("Contexts known to this server are: <ul>");

			Server server = getServer();
			Handler[] handlers = server==null?null:server.getChildHandlersByClass(ContextHandler.class);

			for (int i=0;handlers!=null && i<handlers.length;i++)
			{
				ContextHandler context = (ContextHandler)handlers[i];
				if (context.isRunning())
				{
					writer.write("<li><a href=\"");
					writer.write(context.getContextPath());
					if (context.getContextPath().length()>1 && context.getContextPath().endsWith("/"))
						writer.write("/");
					writer.write("\">");
					writer.write(context.getContextPath());
					writer.write("&nbsp;--->&nbsp;");
					writer.write(context.toString());
					writer.write("</a></li>\n");
				}
				else
				{
					writer.write("<li>");
					writer.write(context.getContextPath());
					writer.write("&nbsp;--->&nbsp;");
					writer.write(context.toString());
					if (context.isFailed())
						writer.write(" [failed]");
					if (context.isStopped())
						writer.write(" [stopped]");
					writer.write("</li>\n");
				}
			}
		}

		for (int i=0;i<10;i++)
			writer.write("\n<!-- Padding for IE                  -->");

		writer.write("\n</BODY>\n</HTML>\n");
		writer.flush();
		response.setContentLength(writer.size());
		OutputStream out=response.getOutputStream();
		writer.writeTo(out);
		out.close();
	}

	public boolean getShowContexts()
	{
		return _showContexts;
	}

	public void setShowContexts(boolean show)
	{
		_showContexts = show;
	}

}
author	Franklin Schmidt <fschmidt@gmail.com>
date	Sun, 23 Oct 2016 17:43:49 -0600
parents	32d4b569567c
children	3718afd99988