Application specific directory listings not working as expected

[Roland Lammel <rl...@brabbel.net>]

Hi all,

The default setting for directory listing is false in tomcat's
web.xml(which is good idea anyway), some applications require
directory listings
though.

Trying to follow a configuration posted earlier, I found that to be not
working as expected.
The idea is the configure a "application specific" default servlet (simply
copy from tomcat's web.xml), change the servlet name and add a servlet
mapping for the specific directory to be allowed for listing.

This is the applications excerpt of the mapping:

<servlet>
   <servlet-name>MyListing</servlet-name>
   <servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>
   <init-param>
     <param-name>listings</param-name>
     <param-value>true</param-value>
   </init-param>
   <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
   <servlet-name>MyListing</servlet-name>
   <url-pattern>/myappdir/</url-pattern>
 </servlet-mapping>

I see that the servlet MyListing is actually used and processing the
request, but directory listing is still forbidden (with 404), as if the
init-param "listings" would simply be ignored.

Any comments on why this config does not work as expected or other possible
approaches would be higly appreciated.

BR
-- 
Roland Lammel

"Enjoy your job, make lots of money, work within the law. Choose any two."

RE: Application specific directory listings not working as expected

["Caldarale, Charles R" <Ch...@unisys.com>]

> From: roland.lammel@gmail.com 
> Subject: Application specific directory listings not working 
> as expected
> 
> The idea is the configure a "application specific" default 
> servlet (simply copy from tomcat's web.xml), change the
> servlet name and add a servlet mapping for the specific
> directory to be allowed for listing.

I think the problem with the above is that the DefaultServlet does not
include the <url-pattern> when retrieving static resources, including
directory listings.  Consequently, the desired directory is never
actually found, resulting in the 404 status.

>  <servlet-mapping>
>    <servlet-name>MyListing</servlet-name>
>    <url-pattern>/myappdir/</url-pattern>
>  </servlet-mapping>

Try changing the <url-pattern> above to just a single slash; this should
get you the listings you need, although it does open up all of the
directories of your app that don't have welcome files and aren't under
WEB-INF.  If you really want to give listing access to only a select set
of directories, you may have to place them in a separate webapp.

 - Chuck


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