Download deployed Apache Tomcat .war file

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http://serverfault.com – I am a Apache Tomcat newbie and about to deploy an upgraded version of a Spring MVC application (compiled to a .war file) on an Apache Tomcat/6.0.28 server, using Tomcat Web Application Manager. Because I am not 100% certain that the application will work properly in a production environment, I want to be able to roll back to the currently deployed .war file. Since I don't have this file locally but it obviously is on the server, I would like to download it from Tomcat Web Application Manager before I overwrite it. Is this possible or is there another way? (HowTos)