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view src/nabble/view/lib/NabbleErrorHandler.jtp @ 19:18cf4872fd7f

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remove anonymous posting
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 29 May 2020 22:58:25 -0600
parents 7ecd1a4ef557
children
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<%
package nabble.view.lib;

import fschmidt.util.java.HtmlUtils;
import fschmidt.util.servlet.ServletUtils;
import nabble.model.Init;
import nabble.model.Site;
import nabble.model.UpdatingException;
import nabble.model.User;
import org.eclipse.jetty.http.HttpGenerator;
import org.eclipse.jetty.server.Request;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;


public final class NabbleErrorHandler extends org.eclipse.jetty.server.handler.ErrorHandler {

	private static final Logger logger = LoggerFactory.getLogger(NabbleErrorHandler.class);
	private HttpServletResponse response;

	public void handle(String string, Request request, HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws IOException {
		this.response = httpServletResponse;
		super.handle(string, request, httpServletRequest, httpServletResponse);
	}

	protected void writeErrorPage(HttpServletRequest request, Writer writer, int code, String message, boolean showStacks)
        throws IOException
    {
		if (code == HttpServletResponse.SC_SERVICE_UNAVAILABLE) {
			serviceUnavailablePage(writer);
			return;
		}
		if (message == null)
			message = HttpGenerator.getReasonBuffer(code).toString();

		Throwable throwable = (Throwable)request.getAttribute(NabbleErrorFilter.WORK_AROUND_ERROR_EXCEPTION);
		if (UpdatingException.isIn(throwable)) {
			logger.error("Updating database: "+ServletUtils.getCurrentURL(request));
			databaseUpdatePage(writer);
			return;
		}
		try {
			writeMyErrorPage(request,writer,code,message,showStacks, throwable);
		} catch (ServletException e) {
			logger.error(ServletUtils.getCurrentURL(request), e);
			throw new RuntimeException(e);
		} catch (RuntimeException e) {
			logger.error(ServletUtils.getCurrentURL(request), e);
			throw e;
		}
	}

    private void writeMyErrorPage(HttpServletRequest request, Writer writer, int code, String message, boolean showStacks, Throwable throwable)
        throws IOException, ServletException
    {
		PrintWriter out = new PrintWriter(writer);
		boolean hasTweaks = false;
		boolean isAdmin = false;
		String homeLink;
		Site site = null;
		try {
			site = Jtp.getSite(request);
		} catch(RuntimeException e) {}
		if( site == null ) {
			homeLink = "<a href='" + Jtp.homePage() + "'>Nabble</a>";
		} else {
			homeLink = Jtp.link(site.getRootNode());
			hasTweaks = site.getCustomTweaks().size() > 0;
			User user = Jtp.getUser(request);
			isAdmin = user != null && (site.getRootNode().getOwner().equals(user) || Permissions.isInGroup(user, "Administrators"));
		}
		%>
		<html>
			<head>
				<% writeErrorPageHead(request,writer,code,message); %>
				<META NAME="robots" CONTENT="noindex,nofollow">
				<link rel="stylesheet" href="<%=Shared.getCssPath()%>" type="text/css" />
				<style type="text/css">
					p { margin: .3em 0 0; }
					.error-details {
						border: 1px solid gray;
						padding: .5em;
						width:90%;
						margin-left:2.5%;
						position: relative;
						overflow-x:scroll;
					}
				</style>
			</head>
			<body>
				<%
				String uri = request.getRequestURI();
		        if (uri!=null) {
					uri = HtmlUtils.htmlEncode(uri);
		        }
				%>
				<div class="nabble" id="nabble">
					<div class="top-bar">
						<div class="breadcrumbs" style="float:left;">
							<%=homeLink%>
						</div>
					</div>
					<%
					if (throwable != null) {
						if( throwable instanceof ServletException ) {
							if( MinorServletException.isIn(throwable) ) {
								logger.info(ServletUtils.getCurrentURL(request), throwable);
							} else {
								logger.warn(ServletUtils.getCurrentURL(request), throwable);
							}
						} else {
							logger.error(ServletUtils.getCurrentURL(request), throwable);
						}
						%>
						<h1>Oops... An error has occurred</h1>

						Please contact <a href="<%=Jtp.supportUrl()%>" target="_new">Nabble Support</a> and explain what you did to cause this error.
						Your feedback is very important to us.

						<% if (hasTweaks) { %>
							<% if (isAdmin) { %>
								<div class="info-message rounded" style="margin-top:1em;padding:.5em .3em">
									<h3 style="margin-top:0;padding-top:0">Modified NAML Code</h3>
									<%=site.getRootNode().getSubjectHtml()%> has modified NAML code and this could be the cause of the error below.
									Please take a careful look at your changes and try to make sure your code is not broken.<br/>
								</div>
							<% } %>
							<div style="margin:1.2em 0;font-weight:bold">
								<img src="/images/tool.png" width="16" height="17" style="vertical-align:-25%"/>
								<a href="/template/NamlEditor.jtp">Go to NAML Editor</a>
							</div>
						<% } %>

						<h2 style="margin-top:1em">More Details</h2>
						<div class="error-details light-bg-color">
							<h3>Error <%=code%></h3>
							<pre><%=HtmlUtils.htmlEncode(message)%></pre>
							<% if (throwable.getCause() != null) {
								String msg = throwable.getCause().getMessage();
								if( msg != null ) {
									int posBreak = msg.indexOf("\n\t");
									msg = posBreak > 0? msg.substring(0, posBreak) : msg;
									msg = HtmlUtils.htmlEncode(msg);
									msg = msg.replaceAll("\n", "<br/>").replaceAll("\t","&nbsp;&nbsp;&nbsp;&nbsp;");
									%>
									<p><b>Message</b>: <%=msg%></p>
									<%
								}
							}%>
							<p><b>RequestURI</b>: <%=uri%></p>
							<p><b>Server</b>: <%=Jtp.getDefaultHost()%></p>
							<%

							if (showStacks) {
								StringWriter sw = new StringWriter();
								PrintWriter pw = new PrintWriter(sw);
								throwable.printStackTrace(pw);
								pw.flush();
								%><h3 style="margin-top:1.2em">Caused by:</h3><pre><%=HtmlUtils.htmlEncode(sw.toString())%></pre><%
							}
							%>
						</div>
						<%
					} else {
						%>
						<h2 style="padding:0;margin:1em 0"><%=message%></h2>

						Please contact <a href="<%=Jtp.supportUrl()%>" target="_new">Nabble Support</a> if you need help.
						<%
					}
					{
						StringBuffer url = request.getRequestURL();
						String query = request.getQueryString();
						if( query != null )
							url.append( '?' ).append( query );
						%>
						<p>URL = <a href="<%=url%>"><%=url%></a></p>
						<%
					}
					%>
					<table class="footer-table shaded-bg-color">
						<tr>
							<td class="footer-left">
								Powered by <a href="<%=Jtp.homePage()%>" target="_top" title="Free forum and other embeddable web apps">Nabble</a>
							</td>
							<td class="footer-right"></td>
						</tr>
					</table>
				</div>
			</body>
		</html>
		<%
	}

	private void serviceUnavailablePage(Writer writer) {
		PrintWriter out = new PrintWriter(writer);
		%>
		<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
		<html>
			<head>
				<title>Service Unavailable</title>
				<META NAME="robots" CONTENT="noindex,nofollow">
			</head>
			<body style="text-align:center;font-family: Verdana,sans-serif;font-size:.84em;padding-top:2em">
				<img src="https://www.nabble.com/assets/images/logo_nabble_home.png"/>
				<h1 style="margin-top:1.5em">This Nabble server is over capacity.</h1>
				<div style="margin:0 15% 2em;text-align:center;background:#eee;padding:1em 0">
					Too many requests... Please wait a moment and try again.
				</div>

				Powered by <a href="https://www.nabble.com/">Nabble</a>
				</div>
			</body>
		</html>
		<%
	}

	private void databaseUpdatePage(Writer writer) {
		PrintWriter out = new PrintWriter(writer);
		%>
		<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
		<html>
			<head>
				<title>Updating Database</title>
				<META NAME="robots" CONTENT="noindex,nofollow">
			</head>
			<body style="text-align:center;font-family: Verdana,sans-serif;font-size:.84em;padding-top:2em">
				<h1 style="margin-top:3em">Updating Database</h1>
				<div style="margin:0 25% 2em;text-align:center;background:#eee;padding:1em 0">
					This database is being updated. Please try again in a few seconds.
				</div>
				<h2>Reloading in <span id="sec">60</span> seconds</h2>
				<script type="text/javascript">
					var seconds = 60;
					function countDown() {
						if (seconds == 0) {
							window.location.reload();
							return;
						}
						document.getElementById('sec').innerHTML = seconds;
						seconds--;
						setTimeout(countDown, 1000);
					};
					countDown();
				</script>

				Powered by <a href="https://www.nabble.com/">Nabble</a>
				</div>
			</body>
		</html>
		<%
	}
}
%>