Tomcat example source code file (default-servlet.xml)
The Tomcat default-servlet.xml source code
<?xml version="1.0"?> <!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --> <!DOCTYPE document [ <!ENTITY project SYSTEM "project.xml"> ]> <document url="default-servlet.html"> &project; <properties> <author email="firstname.lastname@example.org">Tim Funk <title>Default Servlet Reference </properties> <body> <section name="Introduction"> This discusses different ways to manipulate the default servlet. Topics are <ul> <li>What is the DefaultServlet? <li>Where is it declared? <li>What can I change? <li>How do I customize directory listings? <li>How do I secure directory listings? </ul> </section> <section name="What is the DefaultServlet"> <a name="what"> The default servlet is the servlet which serves static resources as well as serves the directory listings (if directory listings are enabled). </section> <section name="Where is it declared?"> <a name="where"> It is declared globally in <i>$CATALINA_HOME/conf/web.xml. By default here is it's declaration: <source> <servlet> <servlet-name>default</servlet-name> <servlet-class> org.apache.catalina.servlets.DefaultServlet </servlet-class> <init-param> <param-name>debug</param-name> <param-value>0</param-value> </init-param> <init-param> <param-name>listings</param-name> <param-value>true</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> ... <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </source> So by default, the default servlet is loaded at webapp startup and directory listings are enabled and debugging is turned off. </section> <section name="What can I change?"> <a name="change"> The DefaultServlet allows the following initParamters: <table border="1"> <tr> <th valign='top'>debug <td valign='top'> Debugging level. It is not very useful unless you are a tomcat developer. As of this writing, useful values are 0, 1, 11, 1000. </td> </tr> <tr> <th valign='top'>listings <td valign='top'> If no welcome file is present, can a directory listing be shown? value may be <b>true or false <br /> Welcome files are part of the servlet api. <br /> <b>WARNING: Listings of directories containing many entries are expensive. Multiple requests for large directory listings can consume significant proportions of server resources. </td> </tr> <tr> <th valign='top'>readmeFile <td valign='top'> If a directory listing is presented, a readme file may also be presented with the listing. This file is inserted as is so it may contain HTML. default value is null </td> </tr> <tr> <th valign='top'>globalXsltFile <td valign='top'> If you wish to customize your directory listing, you can use an XSL transformation. This value is an absolute file name which be used for all direcotory listings. This can be disabled by per webapp by also declaring the default servlet in your local webapp's web.xml. The format of the xml is shown below. </td> </tr> <tr> <th valign='top'>localXsltFile <td valign='top'> You may also customize your directory listing by directory by configuring <code>localXsltFile. This should be a relative file name in the directory where the listing will take place. This overrides <code>globalXsltFile. If this value is present but a file does not exist, then <code>globalXsltFile will be used. If <code>globalXsltFile does not exist, then the default directory listing will be shown. </td> </tr> <tr> <th valign='top'>input <td valign='top'> Input buffer size (in bytes) when reading resources to be served.  </td> </tr> <tr> <th valign='top'>output <td valign='top'> Output buffer size (in bytes) when writing resources to be served.  </td> </tr> <tr> <th valign='top'>readonly <td valign='top'> Is this context "read only", so HTTP commands like PUT and DELETE are rejected? [true] </td> </tr> <tr> <th valign='top'>fileEncoding <td valign='top'> File encoding to be used when reading static resources. [platform default] </td> </tr> <tr> <th valign='top'>sendfileSize <td valign='top'> If the connector used supports sendfile, this represents the minimal file size in KB for which sendfile will be used. Use a negative value to always disable sendfile.  </td> </tr> </table> </section> <section name="How do I customize directory listings?"> <a name="dir"> <p>You can override DefaultServlet with you own implementation and use that in your web.xml declaration. If you can undertand what was just said, we will assume yo can read the code to DefaultServlet servlet and make the appropriate adjustments. (If not, then that method isn't for you) </p> <p> You can use either <code>localXsltFile or <code>globalXsltFile and DefaultServlet will create an xml document and run it through an xsl transformation based on the values provided in <code>localXsltFile and <code>globalXsltFile.
Other Tomcat examples (source code examples)
Here is a short list of links related to this Tomcat default-servlet.xml source code file:
Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.
A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.