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+<html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Apache Tomcat 6.0 (6.0.39) - SSI How To</title><meta name="author" content="Glenn L. Nielsen"><style type="text/css" media="print">
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+ </style></head><body bgcolor="#ffffff" text="#000000" link="#525D76" alink="#525D76" vlink="#525D76"><table border="0" width="100%" cellspacing="0"><!--PAGE HEADER--><tr><td><!--PROJECT LOGO--><a href="http://tomcat.apache.org/"><img src="./images/tomcat.gif" align="right" alt="
+ The Apache Tomcat Servlet/JSP Container
+ " border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 6.0</font></h1><font face="arial,helvetica,sanserif">Version 6.0.39, Jan 27 2014</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="./images/asf-logo.gif" align="right" alt="Apache Logo" border="0"></a></td></tr></table><table border="0" width="100%" cellspacing="4"><!--HEADER SEPARATOR--><tr><td colspan="2"><hr noshade="noshade" size="1"></td></tr><tr><!--LEFT SIDE NAVIGATION--><td width="20%" valign="top" nowrap="nowrap" class="noPrint"><p><strong>Links</strong></p><ul><li><a href="index.html">Docs Home</a></li><li><a href="http://wiki.apache.org/tomcat/FAQ">FAQ</a></li></ul><p><strong>User Guide</strong></p><ul><li><a href="introduction.html">1) Introduction</a></li><li><a href="setup.html">2) Setup</a></li><li><a href="appdev/index.html">3) First webapp</a></li><li><a href="deployer-howto.html">4) Deployer</a></li><li><a href="manager-howto.html">5) Manager</a></li><li><a href="realm-howto.html">6) Realms and AAA</a></li><li><a href="security-manager-howto.html">7) Security Manager</a></li><li><a href="jndi-resources-howto.html">8) JNDI Resources</a></li><li><a href="jndi-datasource-examples-howto.html">9) JDBC DataSources</a></li><li><a href="class-loader-howto.html">10) Classloading</a></li><li><a href="jasper-howto.html">11) JSPs</a></li><li><a href="ssl-howto.html">12) SSL</a></li><li><a href="ssi-howto.html">13) SSI</a></li><li><a href="cgi-howto.html">14) CGI</a></li><li><a href="proxy-howto.html">15) Proxy Support</a></li><li><a href="mbeans-descriptor-howto.html">16) MBean Descriptor</a></li><li><a href="default-servlet.html">17) Default Servlet</a></li><li><a href="cluster-howto.html">18) Clustering</a></li><li><a href="balancer-howto.html">19) Load Balancer</a></li><li><a href="connectors.html">20) Connectors</a></li><li><a href="monitoring.html">21) Monitoring and Management</a></li><li><a href="logging.html">22) Logging</a></li><li><a href="apr.html">23) APR/Native</a></li><li><a href="virtual-hosting-howto.html">24) Virtual Hosting</a></li><li><a href="aio.html">25) Advanced IO</a></li><li><a href="extras.html">26) Additional Components</a></li><li><a href="maven-jars.html">27) Mavenized</a></li></ul><p><strong>Reference</strong></p><ul><li><a href="RELEASE-NOTES.txt">Release Notes</a></li><li><a href="config/index.html">Configuration</a></li><li><a href="api/index.html">Javadocs</a></li><li><a href="http://tomcat.apache.org/connectors-doc/">JK 1.2 Documentation</a></li></ul><p><strong>Apache Tomcat Development</strong></p><ul><li><a href="building.html">Building</a></li><li><a href="changelog.html">Changelog</a></li><li><a href="http://wiki.apache.org/tomcat/TomcatVersions">Status</a></li><li><a href="developers.html">Developers</a></li><li><a href="architecture/index.html">Architecture</a></li><li><a href="funcspecs/index.html">Functional Specs.</a></li></ul></td><!--RIGHT SIDE MAIN BODY--><td width="80%" valign="top" align="left" id="mainBody"><h1>Apache Tomcat 6.0</h1><h2>SSI How To</h2><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Table of Contents"><!--()--></a><a name="Table_of_Contents"><strong>Table of Contents</strong></a></font></td></tr><tr><td><blockquote>
+<ul><li><a href="#Introduction">Introduction</a></li><li><a href="#Installation">Installation</a></li><li><a href="#Servlet_Configuration">Servlet Configuration</a></li><li><a href="#Filter_Configuration">Filter Configuration</a></li><li><a href="#Directives">Directives</a></li><li><a href="#Variables">Variables</a></li></ul>
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Introduction"><strong>Introduction</strong></a></font></td></tr><tr><td><blockquote>
+
+<p>SSI (Server Side Includes) are directives that are placed in HTML pages,
+and evaluated on the server while the pages are being served. They let you
+add dynamically generated content to an existing HTML page, without having
+to serve the entire page via a CGI program, or other dynamic technology.
+</p>
+
+<p>Within Tomcat SSI support can be added when using Tomcat as your
+HTTP server and you require SSI support. Typically this is done
+during development when you don't want to run a web server like Apache.</p>
+
+<p>Tomcat SSI support implements the same SSI directives as Apache. See the
+<a href="http://httpd.apache.org/docs/howto/ssi.html#basicssidirectives">
+Apache Introduction to SSI</a> for information on using SSI directives.</p>
+
+<p>SSI support is available as a servlet and as a filter. You should use one
+or the other to provide SSI support but not both.</p>
+
+<p>Servlet based SSI support is implemented using the class
+<code>org.apache.catalina.ssi.SSIServlet</code>. Traditionally, this servlet
+is mapped to the URL pattern "*.shtml".</p>
+
+<p>Filter based SSI support is implemented using the class
+<code>org.apache.catalina.ssi.SSIFilter</code>. Traditionally, this filter
+is mapped to the URL pattern "*.shtml", though it can be mapped to "*" as
+it will selectively enable/disable SSI processing based on mime types. The
+contentType init param allows you to apply SSI processing to JSP pages,
+javascript, or any other content you wish.</p>
+<p>By default SSI support is disabled in Tomcat.</p>
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Installation"><strong>Installation</strong></a></font></td></tr><tr><td><blockquote>
+
+<p><strong>CAUTION</strong> - SSI directives can be used to execute programs
+external to the Tomcat JVM. If you are using the Java SecurityManager this
+will bypass your security policy configuration in <code>catalina.policy.</code>
+</p>
+
+<p>To use the SSI servlet, remove the XML comments from around the SSI servlet
+and servlet-mapping configuration in
+<code>$CATALINA_BASE/conf/web.xml</code>.</p>
+
+<p>To use the SSI filter, remove the XML comments from around the SSI filter
+and filter-mapping configuration in
+<code>$CATALINA_BASE/conf/web.xml</code>.</p>
+
+<p>Only Contexts which are marked as privileged may use SSI features (see the
+privileged property of the Context element).</p>
+
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Servlet Configuration"><!--()--></a><a name="Servlet_Configuration"><strong>Servlet Configuration</strong></a></font></td></tr><tr><td><blockquote>
+
+<p>There are several servlet init parameters which can be used to
+configure the behaviour of the SSI servlet.
+<ul>
+<li><strong>buffered</strong> - Should output from this servlet be buffered?
+(0=false, 1=true) Default 0 (false).</li>
+<li><strong>debug</strong> - Debugging detail level for messages logged
+by this servlet. Default 0.</li>
+<li><strong>expires</strong> - The number of seconds before a page with SSI
+directives will expire. Default behaviour is for all SSI directives to be
+evaluated for every request.</li>
+<li><strong>isVirtualWebappRelative</strong> - Should "virtual" SSI directive
+paths be interpreted as relative to the context root, instead of the server
+root? Default false.</li>
+<li><strong>inputEncoding</strong> - The encoding to be assumed for SSI
+resources if one cannot be determined from the resource itself. Default is
+the default platform encoding.</li>
+<li><strong>outputEncoding</strong> - The encoding to be used for the result
+of the SSI processing. Default is UTF-8.</li>
+<li><strong>allowExec</strong> - Is the exec command enabled? Default is
+false.</li>
+</ul>
+</p>
+
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Filter Configuration"><!--()--></a><a name="Filter_Configuration"><strong>Filter Configuration</strong></a></font></td></tr><tr><td><blockquote>
+
+<p>There are several filter init parameters which can be used to
+configure the behaviour of the SSI filter.
+<ul>
+<li><strong>contentType</strong> - A regex pattern that must be matched before
+SSI processing is applied. When crafting your own pattern, don't forget that a
+mime content type may be followed by an optional character set in the form
+"mime/type; charset=set" that you must take into account. Default is
+"text/x-server-parsed-html(;.*)?".</li>
+<li><strong>debug</strong> - Debugging detail level for messages logged
+by this servlet. Default 0.</li>
+<li><strong>expires</strong> - The number of seconds before a page with SSI
+directives will expire. Default behaviour is for all SSI directives to be
+evaluated for every request.</li>
+<li><strong>isVirtualWebappRelative</strong> - Should "virtual" SSI directive
+paths be interpreted as relative to the context root, instead of the server
+root? Default false.</li>
+<li><strong>allowExec</strong> - Is the exec command enabled? Default is
+false.</li>
+</ul>
+</p>
+
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Directives"><strong>Directives</strong></a></font></td></tr><tr><td><blockquote>
+<p>Server Side Includes are invoked by embedding SSI directives in an HTML document
+ whose type will be processed by the SSI servlet. The directives take the form of an HTML
+ comment. The directive is replaced by the results of interpreting it before sending the
+ page to the client. The general form of a directive is: </p>
+<p> <code><!--#directive [parm=value] --></code></p>
+<p>The directives are:
+<ul>
+<li>
+<strong>config</strong> - <code><!--#config timefmt="%B %Y" --></code>
+Used to set the format of dates and other items processed by SSI
+</li>
+<li>
+<strong>echo</strong> - <code><!--#echo var="VARIABLE_NAME" --></code>
+will be replaced by the value of the variable.
+</li>
+<li>
+<strong>exec</strong> - Used to run commands on the host system.
+</li>
+<li>
+<strong>include</strong> - <code><!--#include virtual="file-name" --></code>
+inserts the contents
+</li>
+<li>
+<strong>flastmod</strong> - <code><!--#flastmod file="filename.shtml" --></code>
+Returns the time that a file was lost modified.
+</li>
+<li>
+<strong>fsize</strong> - <code><!--#fsize file="filename.shtml" --></code>
+Returns the size of a file.
+</li>
+<li>
+<strong>printenv</strong> - <code><!--#printenv --></code>
+Returns the list of all the defined variables.
+</li>
+<li>
+<strong>set</strong> - <code><!--#set var="foo" value="Bar" --></code>
+is used to assign a value to a user-defind variable.
+</li>
+<li>
+<strong>if elif endif else</strong> - Used to create conditional sections. For example:</li>
+<code><!--#config timefmt="%A" --><br>
+ <!--#if expr="$DATE_LOCAL = /Monday/" --><br>
+ <p>Meeting at 10:00 on Mondays</p><br>
+ <!--#elif expr="$DATE_LOCAL = /Friday/" --><br>
+ <p>Turn in your time card</p><br>
+ <!--#else --><br>
+ <p>Yoga class at noon.</p><br>
+ <!--#endif --></code>
+ </ul>
+</p>
+See the
+<p> <a href="http://httpd.apache.org/docs/howto/ssi.html#basicssidirectives">
+Apache Introduction to SSI</a> for more information on using SSI directives.</p>
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Variables"><strong>Variables</strong></a></font></td></tr><tr><td><blockquote>
+<p>The SSI servlet currently implements the following variables:
+</p>
+<table border="1">
+<tr>
+<th>Variable Name</th>
+<th>Description</th>
+</tr>
+
+<tr>
+<td>AUTH_TYPE</td>
+<td>
+ The type of authentication used for this user: BASIC, FORM, etc.</td>
+</tr>
+
+<tr>
+<td>CONTENT_LENGTH</td>
+<td>
+ The length of the data (in bytes or the number of
+ characters) passed from a form.</td>
+</tr>
+
+<tr>
+<td>CONTENT_TYPE</td>
+<td>
+ The MIME type of the query data, such as "text/html".</td>
+</tr>
+
+<tr>
+<td>DATE_GMT</td>
+<td>
+Current date and time in GMT</td>
+</tr>
+
+<tr>
+<td>DATE_LOCAL</td>
+<td>
+Current date and time in the local time zone</td>
+</tr>
+<tr>
+<td>DOCUMENT_NAME</td>
+<td>
+The current file</td>
+</tr>
+<tr>
+<td>DOCUMENT_URI</td>
+<td>
+Virtual path to the file</td>
+</tr>
+
+<tr>
+<td>GATEWAY_INTERFACE</td>
+<td>
+ The revision of the Common Gateway Interface that the
+ server uses if enabled: "CGI/1.1".</td>
+</tr>
+
+<tr>
+<td>HTTP_ACCEPT</td>
+<td>
+ A list of the MIME types that the client can accept.</td>
+</tr>
+
+<tr>
+<td>HTTP_ACCEPT_ENCODING</td>
+<td>
+ A list of the compression types that the client can accept.</td>
+</tr>
+
+<tr>
+<td>HTTP_ACCEPT_LANGUAGE</td>
+<td>
+ A list of the languages that the client can accept.</td>
+</tr>
+<tr>
+<td>HTTP_CONNECTION</td>
+<td>
+ The way that the connection from the client is being managed:
+ "Close" or "Keep-Alive".</td>
+</tr>
+<tr>
+<td>HTTP_HOST</td>
+<td>
+ The web site that the client requested.</td>
+</tr>
+<tr>
+<td>HTTP_REFERER</td>
+<td>
+ The URL of the document that the client linked from.</td>
+</tr>
+<tr>
+<td>HTTP_USER_AGENT</td>
+<td>
+ The browser the client is using to issue the request.</td>
+</tr>
+<tr>
+<td>LAST_MODIFIED</td>
+<td>
+Last modification date and time for current file</td>
+</tr>
+<tr>
+<td>PATH_INFO</td>
+<td>
+ Extra path information passed to a servlet.</td>
+</tr>
+<tr>
+<td>PATH_TRANSLATED</td>
+<td>
+ The translated version of the path given by the
+ variable PATH_INFO.</td>
+</tr>
+<tr>
+<td>QUERY_STRING</td>
+<td>
+The query string that follows the "?" in the URL.
+</td>
+</tr>
+<tr>
+<td>QUERY_STRING_UNESCAPED</td>
+<td>
+Undecoded query string with all shell metacharacters escaped
+with "\"</td>
+</tr>
+<tr>
+<td>REMOTE_ADDR</td>
+<td>
+ The remote IP address of the user making the request.</td>
+</tr>
+<tr>
+<td>REMOTE_HOST</td>
+<td>
+ The remote hostname of the user making the request.</td>
+</tr>
+<tr>
+<td>REMOTE_PORT</td>
+<td>
+ The port number at remote IP address of the user making the request.</td>
+</tr>
+<tr>
+<td>REMOTE_USER</td>
+<td>
+ The authenticated name of the user.</td>
+</tr>
+<tr>
+<td>REQUEST_METHOD</td>
+<td>
+ The method with which the information request was
+ issued: "GET", "POST" etc.</td>
+</tr>
+<tr>
+<td>REQUEST_URI</td>
+<td>
+ The web page originally requested by the client.</td>
+</tr>
+<tr>
+<td>SCRIPT_FILENAME</td>
+<td>
+ The location of the current web page on the server.</td>
+</tr>
+<tr>
+<td>SCRIPT_NAME</td>
+<td>
+ The name of the web page.</td>
+</tr>
+<tr>
+<td>SERVER_ADDR</td>
+<td>
+ The server's IP address.</td>
+</tr>
+<tr>
+<td>SERVER_NAME</td>
+<td>
+ The server's hostname or IP address.</td>
+</tr>
+<tr>
+<td>SERVER_PORT</td>
+<td>
+ The port on which the server received the request.</td>
+</tr>
+<tr>
+<td>SERVER_PROTOCOL</td>
+<td>
+ The protocol used by the server. E.g. "HTTP/1.1".</td>
+</tr>
+<tr>
+<td>SERVER_SOFTWARE</td>
+<td>
+ The name and version of the server software that is
+ answering the client request.</td>
+</tr>
+<tr>
+<td>UNIQUE_ID</td>
+<td>
+ A token used to identify the current session if one
+ has been established.</td>
+</tr>
+</table>
+</blockquote></td></tr></table></td></tr><!--FOOTER SEPARATOR--><tr><td colspan="2"><hr noshade="noshade" size="1"></td></tr><!--PAGE FOOTER--><tr><td colspan="2"><div align="center"><font color="#525D76" size="-1"><em>
+ Copyright © 1999-2014, Apache Software Foundation
+ </em></font></div></td></tr></table></body></html>
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