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<!DOCTYPE html> <head> <meta charset="utf-8" /> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" /> <title>OpenLiteSpeed Users' Manual - Java Web App Context</title> <meta name="description" content="OpenLiteSpeed Users' Manual - Java Web App Context." /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta name="robots" content="noindex"> <link rel="shortcut icon" href="img/favicon.ico" /> <link rel="stylesheet" type="text/css" href="css/hdoc.css"> </head> <body> <div class="pagewrapper clearfix"><aside class="sidetree ls-col-1-5"> <figure> <img src="img/ols_logo.svg" alt="openlitespeed logo" width="150px"/> </figure> <h2 class="ls-text-thin"> OpenLiteSpeed Web Server <a href="index.html"> Users' Manual</a> </h2> <h3 class="ls-text-muted">Version 1.8  — Rev. 9</h3> <hr/> <div> <ul> <li><a href="license.html">License</a></li> <li><a href="intro.html">Introduction</a></li> <li><a href="install.html">Installation</a></li> <li> <a 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Balancer</a></li> </ul> <li><a href="ScriptHandler_Help.html">Script Handler</a></li> <li><a href="App_Server_Help.html">App Server Settings</a></li> <li><a href="Module_Help.html">Module Configuration</a></li> <li><a href="Listeners_General_Help.html">Listener General</a></li> <li><a href="Listeners_SSL_Help.html">Listener SSL</a></li> <li><a href="Templates_Help.html">Virtual Host Templates</a></li> <li><a href="VirtualHosts_Help.html">Virtual Host Basic</a></li> <li><a href="VHGeneral_Help.html">Virtual Host General</a></li> <li><a href="VHSecurity_Help.html">Virtual Host Security</a></li> <li><a href="VHSSL_Help.html">Virtual Host SSL</a></li> <li><a href="Rewrite_Help.html">Rewrite</a></li> <li><a href="Context_Help.html">Context</a></li> <ul class="level3"> <li><a href="Static_Context.html">Static Context</a></li> <li> <span class="current"><a href="Java_Web_App_Context.html">Java Web App Context</a></span> </li> <li><a href="Servlet_Context.html">Servlet Context</a></li> <li><a href="FCGI_Context.html">Fast CGI Context</a></li> <li><a href="LSAPI_Context.html">LSAPI Context</a></li> <li><a href="Proxy_Context.html">Proxy Context</a></li> <li><a href="CGI_Context.html">CGI Context</a></li> <li><a href="LB_Context.html">Load Balancer Context</a></li> <li><a href="Redirect_Context.html">Redirect Context</a></li> <li><a href="App_Server_Context.html">App Server Context</a></li> <li><a href="Module_Context.html">Module Handler Context</a></li> </ul> <li><a href="VHWebSocket_Help.html">Web Socket Proxy</a></li> </ul> </li> <li><a href="webconsole.html">Web Console</a> <ul class="level2"> <li><a href="AdminGeneral_Help.html">Admin Console General</a></li> <li><a href="AdminSecurity_Help.html">Admin Console Security</a></li> <li> <a href="AdminListeners_General_Help.html"> Admin Listener General </a> </li> <li> <a href="AdminListeners_SSL_Help.html">Admin Listener SSL</a> </li> </ul> </li> </ul> </div> </aside> <article class="contentwrapper ls-col-3-5 clearfix"><div class="nav-bar ls-spacer-micro-top"><div class="prev">&#171 <a href="Static_Context.html">Static Context</a></div><div class="center"><a href="Context_Help.html">Context</a></div><div class="next"><a href="Servlet_Context.html">Servlet Context</a> »</div></div> <h1>Java Web App Context</h1><h2 id="top">Table of Contents</h2><section class="toc"><section class="toc-row"><header><a href="#javaWebAppContext">Java Web App Context</a></header><p> <a href="#uri">URI</a> \| <a href="#javaWebApp_location">Location</a> \| <a href="#javaServletEngine">Servlet Engine</a> \| <a href="#enableExpires">Enable Expires</a> \| <a href="#expiresDefault">Expires Default</a> \| <a href="#expiresByType">Expires By Type</a> \| <a href="#extraHeaders">Header Operations</a> \| <a href="#autoIndex">Auto Index</a> \| <a href="#indexFiles">Index Files</a> \| <a href="#realm">Realm</a> \| <a href="#authName">Authentication Name</a> \| <a href="#required">Require (Authorized Users/Groups)</a> \| <a href="#accessAllowed">Access Allowed</a> \| <a href="#accessDenied">Access Denied</a> \| <a href="#extAuthorizer">Authorizer</a> \| <a href="#addDefaultCharset">Add Default Charset</a> \| <a href="#defaultCharsetCustomized">Customized Default Charset</a> \| <a href="#enableIpGeo">Enable GeoLocation Lookup</a></p></section> </section> <section><div class="helpitem"><article class="ls-helpitem"><div><header id="javaWebAppContext"><h3>Java Web App Context<span class="ls-permlink"><a href="#javaWebAppContext"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Many people running Java applications use the servlet engine to serve static content as well. But no servlet engine is nearly as efficient as LiteSpeed Web Server for these processes. In order to improve the overall performance, LiteSpeed Web Server can be configured as a gateway server, which serves static content and forwards dynamic Java page requests to the servlet engine.<br/><br/> LiteSpeed Web Server requires certain contexts to be defined in order to run a Java application. A Java Web App Context automatically creates all required contexts based on the Java web application's configuration file (WEB-INF/web.xml).<br/><br/> There are a few points you need to keep in mind when setting up a Java Web App Context:<br/> <ul> <li>A <span class="val">Servlet Engine</span> external application must be set up in <span class="tagP"><a href="#ExtApp_Help">External Apps</a></span> before Java Web App Context can be set up.</li> <li>A <span class="tagP"><a href="#ScriptHandler_Help">Script Handler</a></span> for .jsp files should be defined as well.</li> <li>If the web application is packed into a .war file, the .war file must be expanded. The server cannot access compressed archive files.</li> <li>For the same resources, the same URL should be used no matter whether it is accessed through LiteSpeed Web Server or through the servlet engine's built-in HTTP server.<br/> For example, Tomcat 4.1 is installed under /opt/tomcat. Files for the "examples" web application are located at /opt/tomcat/webapps/examples/. Through Tomcat's built-in HTTP server, the "examples" web application is thus accessed with a URI like "/examples/**". The corresponding Java Web App Context should thus be configured: <span class="tagl"><a href="#expuri">URI</a></span> = <span class="val">/examples/</span>, <span class="tagl"><a href="#javaWebApp_location">Location</a></span> = <span class="val">/opt/tomcat/webapps/examples/</span>.</li> </ul></p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="uri"><h3>URI<span class="ls-permlink"><a href="#uri"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies the URI for this context. The URI should start with a "/". If a URI ends with a "/", then this context will include all sub-URIs under this URI.</p> <h4>Syntax</h4><p>URI</p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="javaWebApp_location"><h3>Location<span class="ls-permlink"><a href="#javaWebApp_location"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies the directory that contains the files for this web application. This is the directory containing "WEB-INF/web.xml".<br/><br/> Default value: $DOC_ROOT + <span class="tagl"><a href="#uri">URI</a></span></p> <h4>Syntax</h4><p>path</p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="javaServletEngine"><h3>Servlet Engine<span class="ls-permlink"><a href="#javaServletEngine"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies the name of the servlet engine that serves this web application. Servlet engines must be defined in the <span class="tagP"><a href="#ExtApp_Help">External Apps</a></span> section at the server or virtual host level.</p> <h4>Syntax</h4><p>Select from drop down list</p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="enableExpires"><h3>Enable Expires<span class="ls-permlink"><a href="#enableExpires"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies whether to generate an Expires header for static files. If enabled, an Expires header will be generated based on <span class="tagl"><a href="#expiresDefault">Expires Default</a></span> and <span class="tagl"><a href="#expiresByType">Expires By Type</a></span>.<br/><br/> This can be set at server, virtual host and context level. Lower level settings will override higher level ones, i.e. context settings will override virtual host settings and virtual host settings will override server settings.</p> <h4>Syntax</h4><p>Select from radio box</p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="expiresDefault"><h3>Expires Default<span class="ls-permlink"><a href="#expiresDefault"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies default settings for Expires header generation. This setting takes effect when <span class="tagl"><a href="#enableExpires">Enable Expires</a></span> is set to "Yes". It can be overridden by <span class="tagl"><a href="#expiresByType">Expires By Type</a></span>. Do not set this default at the server or virtual host level unless you have to, since it will generate Expires headers for all pages. Most of time this should be set at the context level for certain directories that do not change often. If there is no default setting, no Expires header will be generated for types not specified in <span class="tagl"><a href="#expiresByType">Expires By Type</a></span>.</p> <h4>Syntax</h4><p>A\|Mseconds<br/> The file will expire after base time(A\|M) plus specified seconds. Base time "A" sets the value to the client's access time and "M" to the file's last modified time.</p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="expiresByType"><h3>Expires By Type<span class="ls-permlink"><a href="#expiresByType"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies Expires header settings for individual MIME types.</p> <h4>Syntax</h4><p>Comma delimited list of "MIME-type=A\|Mseconds". The file will expire after base time (A\|M) plus specified seconds.<br/><br/> Base time "A" sets the value to the client's access time and "M" to the file's last modified time. MIME-type accepts wildcard "", like image/.</p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="extraHeaders"><h3>Header Operations<span class="ls-permlink"><a href="#extraHeaders"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies additional response/request headers to be added. Multiple header directives can be added with one directive per line. "NONE" can be used to disable parent header inheritance. If no directive is provided 'Header' is assumed.</p> <h4>Syntax</h4><p>[Header]\|RequestHeader [condition] set\|append\|merge\|add\|unset header [value] [early\|env=[!]variable]</p> <h4>Example</h4><div class="ls-example">set Cache-control no-cache<br/> append Cache-control no-store<br/> Header set My-header cust_header_val<br/> RequestHeader set My-req-header cust_req_header_val</div><h4>Tips</h4><p><span title="Information" class="ls-icon-info"></span> Syntax and usage are similar to <a href="https://httpd.apache.org/docs/2.2/mod/mod_headers.html#header" target="_blank" rel="noopener noreferrer">Apache's mod_headers directives</a> for supported operations.<br/><br/> <span title="Information" class="ls-icon-info"></span> The 'Header' directive is is optional and can be excluded or left in when copying rules from elsewhere without issue.</p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="autoIndex"><h3>Auto Index<span class="ls-permlink"><a href="#autoIndex"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies whether to generate a directory index on the fly when index files listed in <span class="tagl"><a href="#indexFiles">Index Files</a></span> are not available in a directory. This option is customizable at the virtual host and context level, and is inherited along the directory tree until it is explicitly overridden. You can customize the generated index page. Please check online wiki How-tos.</p> <h4>Syntax</h4><p>Select from radio box</p> <h4>Tips</h4><p><span title="Security" class="ls-icon-security"></span> It is recommended to turn off Auto Index wherever possible to prevent revealing confidential data.</p> <h4>See Also</h4><p class="ls-text-small"><span class="tagl"><a href="#indexFiles">Index Files</a></span>, <span class="tagl"><a href="#autoIndexURI">Auto Index URI</a></span></p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="indexFiles"><h3>Index Files<span class="ls-permlink"><a href="#indexFiles"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies names of index files that will be searched sequentially when a URL is mapped to a directory. You can customize it at the server, virtual host, and context level.</p> <h4>Syntax</h4><p>Comma-delimited list of index filenames.</p> <h4>Tips</h4><p><span title="Performance" class="ls-icon-performance"></span> Only set index files that you need.</p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="realm"><h3>Realm<span class="ls-permlink"><a href="#realm"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies the authorization realm for this context. When specified, a valid username and password must be provided in order to access this context. <span class="tagl"><a href="VHSecurity_Help.html#realms">Authorization Realms</a></span> are set up in the <span class="tagP"><a href="#VHSecurity_Help">Virtual Host Security</a></span> section. This setting uses each realm's <span class="tagl"><a href="VHSecurity_Help.html#realmName">Realm Name</a></span>.</p> <h4>Syntax</h4><p>Select from drop down list</p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="authName"><h3>Authentication Name<span class="ls-permlink"><a href="#authName"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies an alternative name for the authorization realm for the current context. If not specified, the original realm name will be used. The authentication name is displayed on the browser's login pop-up.</p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="required"><h3>Require (Authorized Users/Groups)<span class="ls-permlink"><a href="#required"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies which user/group can access this context. This allows you to use one user/group database (specified in <span class="tagl"><a href="#realm">Realm</a></span>) across a number of contexts, but only allow certain users/groups from that database to access this context.</p> <h4>Syntax</h4><p>Syntax is compatible with Apache's Require directive. For example: <ul> <li><span class="val">user username [username ...]</span><br/> Only listed users can access this context.</li> <li> <span class="val">group groupid [groupid ...]</span><br/> Only users belonging to the listed groups can access this context.</li> </ul> If this setting is not specified, all valid users will be allowed to access this resource.</p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="accessAllowed"><h3>Access Allowed<span class="ls-permlink"><a href="#accessAllowed"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies which IPs or sub-networks are allowed to access resources under this context. Together with <span class="tagl"><a href="#accessDenied">Access Denied</a></span> and server/virtual host level access control, accessibility is determined by the smallest scope that a client's IP address falls into.</p> <h4>Syntax</h4><p>Comma-delimited list of IPs/sub-networks.</p> <h4>Example</h4><div class="ls-example">Sub-networks can be written as <span class="val">192.168.1.0/255.255.255.0</span>, <span class="val">192.168.1</span>, or <span class="val">192.168.1.</span>.</div></article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="accessDenied"><h3>Access Denied<span class="ls-permlink"><a href="#accessDenied"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies which IPs or sub-networks are NOT allowed to access resources under this context. Together with <span class="tagl"><a href="#accessAllowed">Access Allowed</a></span> and server/virtual host-level access control, accessibility is determined by the smallest scope that a client's IP address falls into.</p> <h4>Syntax</h4><p>Comma-delimited list of IPs/sub-networks.</p> <h4>Example</h4><div class="ls-example">Sub-networks can be written as <span class="val">192.168.1.0/255.255.255.0</span>, <span class="val">192.168.1</span>, or <span class="val">192.168.1.*</span>.</div></article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="extAuthorizer"><h3>Authorizer<span class="ls-permlink"><a href="#extAuthorizer"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies an external application that can be used to generate authorized/unauthorized decisions. Currently, only the FastCGI Authorizer is available. For more details about the FastCGI Authorizer role, please visit <a href=" https://fastcgi-archives.github.io/ " target="_blank" rel="noopener noreferrer"> https://fastcgi-archives.github.io/ </a>.</p> <h4>Syntax</h4><p>Select from drop down list</p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="addDefaultCharset"><h3>Add Default Charset<span class="ls-permlink"><a href="#addDefaultCharset"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies whether to add a character set tag to the "Content-Type" response header, when content type is either "text/html" or "text/plain" without any parameters. When set to <span class="val">Off</span>, this function is disabled. When set to <span class="val">On</span>, either the character set specified by <span class="tagl"><a href="#defaultCharsetCustomized">Customized Default Charset</a></span> or the default "iso-8859-1" will be added.</p> <h4>Syntax</h4><p>Select from radio box</p> </article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="defaultCharsetCustomized"><h3>Customized Default Charset<span class="ls-permlink"><a href="#defaultCharsetCustomized"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies a character set to be used when <span class="tagl"><a href="#addDefaultCharset">Add Default Charset</a></span> is <span class="val">On</span>. This is optional. The default value is <span class="val">iso-8859-1</span>. This entry has no effect when <span class="tagl"><a href="#addDefaultCharset">Add Default Charset</a></span> is <span class="val">Off</span>.</p> <h4>Syntax</h4><p>Name of a character set.</p> <h4>Example</h4><div class="ls-example">utf-8</div></article> </div> <div class="helpitem"><article class="ls-helpitem"><div><header id="enableIpGeo"><h3>Enable GeoLocation Lookup<span class="ls-permlink"><a href="#enableIpGeo"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p> Specifies whether to enable/disable IP Geolocation lookup. Can be set at server, virtual host, or context level. IP Geolocation is disabled by default when using value "Not Set".</p> <h4>Syntax</h4><p>Select from radio box</p> <h4>See Also</h4><p class="ls-text-small"><span class="tagl"><a href="ServGeneral_Help.html#useIpInProxyHeader">Use Client IP in Header</a></span>, <span class="tagl"><a href="ServGeneral_Help.html#geoipDBFile">DB File Path</a></span>,</p> </article> </div> </section> </article><div class="ls-col-1-1"><footer class="copyright">Copyright © 2013-2020. <a href="https://www.litespeedtech.com">LiteSpeed Technologies Inc.</a> All rights reserved.</footer> </div></div> </body> </html>

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