freemarker.template.utility

Class Execute

Implemented Interfaces:
TemplateMethodModel, TemplateModel

public class Execute
extends java.lang.Object
implements TemplateMethodModel

Gives FreeMarker the the ability to execute external commands. Will fork a process, and inline anything that process sends to stdout in the template. Based on a patch submitted by Peter Molettiere.

BE CAREFUL! this tag, depending on use, may allow you to set something up so that users of your web application could run arbitrary code on your server. This can only happen if you allow unchecked GET/POST submissions to be used as the command string in the exec tag.

Usage:
From java:

 SimpleHash root = new SimpleHash();

 root.put( "exec", new freemarker.template.utility.Execute() );

 ...
 

From your FreeMarker template:


 The following is executed:
 ${exec( "/usr/bin/ls" )}

 ...
 
Version:
$Id: Execute.java,v 1.14 2003/10/13 11:57:18 szegedia Exp $

Fields inherited from interface freemarker.template.TemplateModel

NOTHING

Method Summary

Object
exec(List arguments)
Executes a method call.

Method Details

exec

public Object exec(List arguments)
            throws TemplateModelException
Executes a method call.
Specified by:
exec in interface TemplateMethodModel
Parameters:
arguments - a List of String objects containing the values of the arguments passed to the method.
Returns:
the TemplateModel produced by the method, or null.