CODEWITHSUNDEEP
httptomcathttp-status-code-404directory-structure
aDoN
aDoN

Reputation: 1961

Tomcat server, change default HTTP 404?

I am using tomcat and I would like, whenever I go to a direction that is not handled by a servlet, do other stuff insead of showing the default error:

type Status report

message /test

description The requested resource is not available.

Where can I handle this¿?

Thank you in advance

Upvotes: 10

Views: 53276

Answers (3)

Grzegorz Jasiński
Grzegorz Jasiński

Reputation: 115

Since Tomcat 9 there is different error handling configuration.

You have to:

  • create simple html error page
  • save it in some directory(for example webapps/ROOT/error_page.html)
  • add valve configuration to server.xml in Host part.
<Valve className="org.apache.catalina.valves.ErrorReportValve" errorCode.404="webapps/ROOT/error_page.html" errorCode.0="webapps/ROOT/error_page.html" showReport="false" showServerInfo="false" />

Please refer: https://stackoverflow.com/a/55702749/2532710 or Tomcat documentation: https://tomcat.apache.org/tomcat-9.0-doc/config/valve.html#Error_Report_Valve

Upvotes: 6

Nux
Nux

Reputation: 10042

Here is a minimal web.xml which you can put in a webapps folder (if you don't want to change 404 pages globally). This will allow you to e.g. redirect all requests to a new folder.

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                      http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
  version="3.0"
  metadata-complete="true">

  <error-page>
    <error-code>404</error-code>
    <location>/redirect.jsp</location>
  </error-page>
</web-app>

Note that web.xml must be put in .../webapps/YourFolder/WEB-INF/web.xml.

In the redirect.jsp. You would put something like:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" dir="ltr">
<head>
    <title>Moved</title>
</head>
<%
    // get the requested URI
    String requestedLocation = request.getRequestURI();
    // rewrite to new location
    String newLocation = requestedLocation.replaceAll("^/Old", "/New");

    // 301 - permanent redirect
    response.setStatus(response.SC_MOVED_PERMANENTLY);
    response.setHeader("Location", newLocation);
%>
<body>
&rarr; <a href="<%=newLocation%>"><%=newLocation%></a>
</body>
</html>

Upvotes: 3

Stefan
Stefan

Reputation: 12462

Define an error page in web.xml:

<error-page>
 <error-code>404</error-code>
 <location>/path/to/your/page.html</location>
</error-page>

Update

  1. No does not need anyting spec. Can be anything, html, jsp, jsf ...
  2. No
  3. Can be placed anywhere, often at the bottom
  4. Between brackets

You can define error pages by their http status (404, 500,...) or by defining the fully qualified exception name (java.lang.Exception, java.io.FileNotFoundException ...). If you are using Servlet 3.x you can even omit the error-code/error-classname part to define a default error page.

Upvotes: 17

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