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From "Bob Schellink (JIRA)" <>
Subject [jira] Created: (CLK-560) Google App Engine support
Date Wed, 17 Jun 2009 19:02:07 GMT
Google App Engine support

                 Key: CLK-560
             Project: Click
          Issue Type: New Feature
            Reporter: Bob Schellink
            Assignee: Bob Schellink
             Fix For: 2.1.0

Google App Engine (GAE) provides free Java hosting and an ideal solution for startups or student
wanting to host their applications.

This JIRA is to provide out-of-the-box support for Click applications.

Here are the issues enountered thus far:

1. - OGNL SecurityManager has to be set to null. This can be achived via a new ServletContextListener
in the extras package.
2. - GAE doesn't support writing to the file system so Click cannot deploy its resources on
the fly. Instead users will have to package resources within the war itself. Servlet 3.0 may
come to the rescue as it allows serving static resources from the META-INF/resources folder.
Very similar to Click's auto deployment from META-INF/web, except Servlet 3.0 serves resources
directly from this location without having to deploy them.
3. - FileUpload doesn't work out of the box as it writes to the file system. Should look at
a Memory FileItem or somesuch solution.
4. - GAE's appengine-web.xml must be setup to exclude serving *.htm resources (if PerformanceFilter
is used png, gif, css and js files should also be excluded)

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