<html><head>
      <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
   <title>Creating Custom Error Pages</title><link rel="stylesheet" type="text/css" href="css/docbook.css"><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"><meta name="keywords" content="jetty, servlet, servlet-api, cometd, http, websocket, eclipse, maven, java, server, software"><link rel="home" href="index.html" title="Jetty"><link rel="up" href="configuring-contexts.html" title="Chapter&nbsp;5.&nbsp;Configuring Contexts"><link rel="prev" href="serving-webapp-from-particular-port.html" title="Serving a WebApp from a Particular Port/Connector"><link rel="next" href="setting-form-size.html" title="Setting Max Form Size"><link xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times" rel="shortcut icon" href="images/favicon.ico"><link rel="stylesheet" href="css/highlighter/foundation.css"><script src="js/highlight.pack.js"></script><script>
      hljs.initHighlightingOnLoad();
    </script><link type="text/css" rel="stylesheet" href="css/font-awesome/font-awesome.min.css"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><table xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><tr><td style="width: 25%"><a href="http://www.eclipse.org/jetty"><img src="images/jetty-header-logo.png" alt="Jetty Logo"></a><br><span style="font-size: small">
            Version: 9.4.28-SNAPSHOT</span></td><td style="width: 50%"></td></tr></table><div xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Creating Custom Error Pages</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="serving-webapp-from-particular-port.html"><i class="fa fa-chevron-left" aria-hidden="true"></i> Previous</a>&nbsp;</td><th width="60%" align="center">Chapter&nbsp;5.&nbsp;Configuring Contexts<br><a accesskey="p" href="index.html"><i class="fa fa-home" aria-hidden="true"></i> Home</a></th><td width="20%" align="right">&nbsp;<a accesskey="n" href="setting-form-size.html">Next <i class="fa fa-chevron-right" aria-hidden="true"></i></a></td></tr></table><hr></div><div xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times" class="jetty-callout"><h5 class="callout"><a href="http://www.webtide.com/">Contact the core Jetty developers at
          <span class="website">www.webtide.com</span></a></h5><p>
 private support for your internal/customer projects ... custom extensions and distributions ... versioned snapshots for indefinite support ...
 scalability guidance for your apps and Ajax/Comet projects ... development services for sponsored feature development
      </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="custom-error-pages"></a>Creating Custom Error Pages</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="section"><a href="custom-error-pages.html#_defining_error_pages_in_web_xml">Defining error pages in web.xml</a></span></dt><dt><span class="section"><a href="custom-error-pages.html#_configuring_error_pages_context_files">Configuring error pages context files</a></span></dt><dt><span class="section"><a href="custom-error-pages.html#_custom_errorhandler_class">Custom ErrorHandler class</a></span></dt><dt><span class="section"><a href="custom-error-pages.html#_server_level_404_error">Server level 404 error</a></span></dt></dl></div><p>The following sections describe several ways to create custom error pages in Jetty.</p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="_defining_error_pages_in_web_xml"></a>Defining error pages in web.xml</h3></div></div></div><p>You can use the standard webapp configuration file located in <code class="literal">webapp/WEB-INF/web.xml</code> to map errors to specific URLs with the <code class="literal">error-page</code> element.
This element creates a mapping between the error-code or exception-type to the location of a resource in the web application.</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><code class="literal">error-code</code> - an integer value</li><li class="listitem"><code class="literal">exception-type</code> - a fully qualified class name of a Java Exception type</li><li class="listitem"><code class="literal">location</code> - location of the resource in the webapp relative to the root of the web application. Value should start with <code class="literal">/</code>.</li></ul></div><p>Error code example:</p><pre xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><code>&lt;error-page&gt;
  &lt;error-code&gt;404&lt;/error-code&gt;
  &lt;location&gt;/jspsnoop/ERROR/404&lt;/location&gt;
&lt;/error-page&gt;</code></pre><p>Exception example:</p><pre xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><code>&lt;error-page&gt;
  &lt;exception-type&gt;java.io.IOException&lt;/exception-type&gt;
  &lt;location&gt;/jspsnoop/IOException&lt;/location&gt;
&lt;/error-page&gt;</code></pre><p>The error page mappings created with the error-page element will redirect to a normal URL within the web application and will be handled as a normal request to that location and thus may be static content, a JSP or a filter and/or servlet.
When handling a request generated by an error redirection, the following request attributes are set and are available to generate dynamic content:</p><div class="variablelist"><dl class="variablelist"><dt><span class="term">javax.servlet.error.exception</span></dt><dd>The exception instance that caused the error (or null).</dd><dt><span class="term">javax.servlet.error.exception_type</span></dt><dd>The class name of the exception instance that caused the error (or null).</dd><dt><span class="term">javax.servlet.error.message</span></dt><dd>The error message.</dd><dt><span class="term">javax.servlet.error.request_uri</span></dt><dd>The URI of the request with an error.</dd><dt><span class="term">javax.servlet.error.servlet_name</span></dt><dd>The Servlet name of the servlet that the request was
dispatched to.</dd><dt><span class="term">javax.servlet.error.status_code</span></dt><dd>The status code of the error (e.g. 404, 500 etc.).</dd></dl></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="_configuring_error_pages_context_files"></a>Configuring error pages context files</h3></div></div></div><p>You can use context IoC XML files to configure the default error page mappings with more flexibility than is available with <code class="literal">web.xml</code>, specifically with the support of error code ranges.
Context files are normally located in <code class="literal">${jetty.base}/webapps/</code> (see <code class="literal">DeployerManager</code> for more details) and an example of more flexible error page mapping is below:</p><pre xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_3.dtd"&gt;

&lt;Configure class="org.eclipse.jetty.webapp.WebAppContext"&gt;
  &lt;Set name="contextPath"&gt;/test&lt;/Set&gt;
  &lt;Set name="war"&gt;
    &lt;SystemProperty name="jetty.base" default="."/&gt;/webapps/test
  &lt;/Set&gt;

  &lt;!-- by Code --&gt;
  &lt;Get name="errorHandler"&gt;
    &lt;Call name="addErrorPage"&gt;
      &lt;Arg type="int"&gt;404&lt;/Arg&gt;
      &lt;Arg type="String"&gt;/jspsnoop/ERROR/404&lt;/Arg&gt;
    &lt;/Call&gt;
  &lt;/Get&gt;

  &lt;!-- by Exception --&gt;
  &lt;Get name="errorHandler"&gt;
    &lt;Call name="addErrorPage"&gt;
      &lt;Arg&gt;
        &lt;Call class="java.lang.Class" name="forName"&gt;
          &lt;Arg type="String"&gt;java.io.IOException&lt;/Arg&gt;
        &lt;/Call&gt;
      &lt;/Arg&gt;
      &lt;Arg type="String"&gt;/jspsnoop/IOException&lt;/Arg&gt;
    &lt;/Call&gt;
  &lt;/Get&gt;

  &lt;!-- by Code Range --&gt;
  &lt;Get name="errorHandler"&gt;
    &lt;Call name="addErrorPage"&gt;
      &lt;Arg type="int"&gt;500&lt;/Arg&gt;
      &lt;Arg type="int"&gt;599&lt;/Arg&gt;
      &lt;Arg type="String"&gt;/dump/errorCodeRangeMapping&lt;/Arg&gt;
    &lt;/Call&gt;
  &lt;/Get&gt;
&lt;/Configure&gt;</code></pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="_custom_errorhandler_class"></a>Custom ErrorHandler class</h3></div></div></div><p>If no error page mapping is defined, or if the error page resource itself has an error, then the error page will be generated by an instance of <code class="literal">ErrorHandler</code> configured either the Context or the Server.
An <code class="literal">ErrorHandler</code> may extend the <code class="literal">ErrorHandler</code> class and may totally replace the handle method to generate an error page, or it can implement some or all of the following methods to partially modify the error pages:</p><pre xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><code>void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException
void handleErrorPage(HttpServletRequest request, Writer writer, int code, String message) throws IOException
void writeErrorPage(HttpServletRequest request, Writer writer, int code, String message, boolean showStacks) throws IOException
void writeErrorPageHead(HttpServletRequest request, Writer writer, int code, String message) throws IOException
void writeErrorPageBody(HttpServletRequest request, Writer writer, int code, String message, boolean showStacks) throws IOException
void writeErrorPageMessage(HttpServletRequest request, Writer writer, int code, String message, String uri) throws IOException
void writeErrorPageStacks(HttpServletRequest request, Writer writer) throws IOException</code></pre><p>An <code class="literal">ErrorHandler</code> instance may be set on a Context by calling the <code class="literal">ContextHandler.setErrorHandler</code> method. This can be done by embedded code or via context IoC XML.
For example:</p><pre xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><code>&lt;Configure class="org.eclipse.jetty.server.handler.ContextHandler"&gt;
  ...
  &lt;Set name="errorHandler"&gt;
    &lt;New class="com.acme.handler.MyErrorHandler"/&gt;
  &lt;/Set&gt;
  ...
&lt;/Configure&gt;</code></pre><p>An <code class="literal">ErrorHandler</code> instance may be set on the entire server by setting it as a dependent bean on the Server instance.
This can be done by calling <code class="literal">Server.addBean(Object)</code> via embedded code or in <code class="literal">jetty.xml</code> IoC XML:</p><pre xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><code>&lt;Configure id="Server" class="org.eclipse.jetty.server.Server"&gt;
  ...
  &lt;Call name="addBean"&gt;
    &lt;Arg&gt;
      &lt;New class="com.acme.handler.MyErrorHandler"/&gt;
    &lt;/Arg&gt;
  &lt;/Call&gt;
  ...
&lt;/Configure&gt;</code></pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="_server_level_404_error"></a>Server level 404 error</h3></div></div></div><p>It is possible to get a <span class="emphasis"><em>page not found</em></span> when a request is made to the server for a resource that is outside of any registered contexts.
As an example, you have a domain name pointing to your public server IP, yet no context is registered with Jetty to serve pages for that domain.
As a consequence, the server, by default, gives a listing of all contexts running on the server.</p><p>One of the quickest ways to avoid this behavior is to create a catch all context.
Create a "root" web app mapped to the "/" URI, and use the <code class="literal">index.html</code> redirect to whatever place with a header directive.</p></div></div><script type="text/javascript">
      SyntaxHighlighter.all()
    </script><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="serving-webapp-from-particular-port.html"><i class="fa fa-chevron-left" aria-hidden="true"></i> Previous</a>&nbsp;</td><td width="20%" align="center"><a accesskey="u" href="configuring-contexts.html"><i class="fa fa-chevron-up" aria-hidden="true"></i> Top</a></td><td width="40%" align="right">&nbsp;<a accesskey="n" href="setting-form-size.html">Next <i class="fa fa-chevron-right" aria-hidden="true"></i></a></td></tr><tr><td width="40%" align="left" valign="top">Serving a WebApp from a Particular Port/Connector&nbsp;</td><td width="20%" align="center"><a accesskey="h" href="index.html"><i class="fa fa-home" aria-hidden="true"></i> Home</a></td><td width="40%" align="right" valign="top">&nbsp;Setting Max Form Size</td></tr></table></div><p xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><div class="jetty-callout">
            See an error or something missing?
            <span class="callout"><a href="http://github.com/eclipse/jetty.project">Contribute to this documentation at
                <span class="website"><i class="fa fa-github" aria-hidden="true"></i> Github!</span></a></span><span style="float: right"><i>(Generated: 2020-03-10)</i></span></div></p></body></html>