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| <!DOCTYPE document [ |
| <!ENTITY project SYSTEM "project.xml"> |
| ]> |
| <document url="cgi-howto.html"> |
| |
| &project; |
| |
| <properties> |
| <author email="glenn@apache.org">Glenn L. Nielsen</author> |
| <title>CGI How To</title> |
| </properties> |
| |
| <body> |
| |
| <section name="Introduction"> |
| |
| <p>The CGI (Common Gateway Interface) defines a way for a web server to |
| interact with external content-generating programs, which are often |
| referred to as CGI programs or CGI scripts. |
| </p> |
| |
| <p>Within Tomcat, CGI support can be added when you are using Tomcat as your |
| HTTP server and require CGI support. Typically this is done |
| during development when you don't want to run a web server like |
| Apache httpd. |
| Tomcat's CGI support is largely compatible with Apache httpd's, |
| but there are some limitations (e.g., only one cgi-bin directory). |
| </p> |
| |
| <p>CGI support is implemented using the servlet class |
| <code>org.apache.catalina.servlets.CGIServlet</code>. Traditionally, |
| this servlet is mapped to the URL pattern "/cgi-bin/*".</p> |
| |
| <p>By default CGI support is disabled in Tomcat.</p> |
| </section> |
| |
| <section name="Installation"> |
| |
| <p><strong>CAUTION</strong> - CGI scripts are 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>Rename <code>$CATALINA_BASE/server/lib/servlets-cgi.renametojar</code> |
| to <code>$CATALINA_BASE/server/lib/servlets-cgi.jar</code>.</p> |
| |
| <p>Remove the XML comments from around the CGI servlet and servlet-mapping |
| configuration in <code>$CATALINA_BASE/conf/web.xml</code>.</p> |
| </section> |
| |
| <section name="Configuration"> |
| |
| <p>There are several servlet init parameters which can be used to |
| configure the behaviour of the CGI servlet. |
| <ul> |
| <li><strong>cgiPathPrefix</strong> - The CGI search path will start at |
| the web application root directory + File.separator + this prefix. |
| The default cgiPathPrefix is <code>WEB-INF/cgi</code></li> |
| <li><strong>debug</strong> - Debugging detail level for messages logged |
| by this servlet. Default 0.</li> |
| <li><strong>executable</strong> - The of the executable to be used to |
| run the script. Default is <code>perl</code>.</li> |
| <li><strong>parameterEncoding</strong> - Name of the parameter encoding |
| to be used with the GCI servlet. Default is |
| <code>System.getProperty("file.encoding","UTF-8")</code>.</li> |
| <li><strong>passShellEnvironment</strong> - Should the shell environment |
| variables (if any) be passed to the CGI script? Default is |
| <code>false</code>.</li> |
| </ul> |
| </p> |
| |
| </section> |
| |
| </body> |
| |
| </document> |
