freemarker.template.utility
Class Execute

java.lang.Object
  freemarker.template.utility.Execute

All 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 $

Field Summary

Fields inherited from interface freemarker.template.TemplateModel

NOTHING

Constructor Summary

Execute()

Method Summary

java.lang.Object

exec(java.util.List arguments) Executes a method call.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Execute

public Execute()

Method Detail

exec

public java.lang.Object exec(java.util.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.

Throws:

TemplateModelException