On Tue, Oct 1, 2024 at 4:53 PM Michael Osipov <micha...@apache.org> wrote:
>
> Folks,
>
> I'd like to put some effort into the DefaultServlet and the WebDAV servlet
> to align them more with mod_autoindex and add some minor improvements if I
> can cover my usecases here at work.
>
> Currently, I use mod_dav which I want to replace with the WebDAV servlet
> because I don't have the authz components in HTTPd like I have in Tomcat
> (it is rather a pain since I need to sync groups into a local file).
>
> The config in HTTPd is straight forward:
> > <LocationMatch "^/(backend-dev|content-dev|prod)/dav(/|$)(.*)">
> >     ProxyPassMatch "!"
> > </LocationMatch>
> >
> > AliasMatch "^/(backend-dev|content-dev|prod)/dav(/|$)(.*)" "/var/foo/$1$2$3"
> > <DirectoryMatch "^/var/foo/(backend-dev|content-dev|prod)(/|$)(.*)">
> >     Dav On
> >     AuthType GSSAPI
> >     AuthName "Foo WebDAV Repository"
> >     AuthzSendForbiddenOnFailure On
> >     Options Indexes
> >     IndexOptions FancyIndexing FoldersFirst Charset=UTF-8 NameWidth=* 
> > SuppressDescription
> >     <Limit GET HEAD OPTIONS PROPFIND>
> >         AuthGroupFile /var/foo/db/apache-groups.txt
> >         Require group foo-maintainers bar-maintainers baz-maintainers
> >     </Limit>
> >     AddDefaultCharset utf-8
> >     AddType text/plain .log .tex
> > </DirectoryMatch>
>
> /(backend-dev|content-dev|prod) are proxied to three Tomcat instances, the
> config above would be replaced with subcontexts at 
> /(backend-dev|content-dev|prod)#dav
> (solely for the DAV purpose) where the web.xml contains:
> > <servlet>
> >       <servlet-name>webdav</servlet-name>
> >       
> > <servlet-class>org.apache.catalina.servlets.WebdavServlet</servlet-class>
> >       <init-param>
> >               <param-name>listings</param-name>
> >               <param-value>true</param-value>
> >       </init-param>
> >       <init-param>
> >               <param-name>showServerInfo</param-name>
> >               <param-value>false</param-value>
> >       </init-param>
> >       <init-param>
> >               <param-name>sortListings</param-name>
> >               <param-value>true</param-value>
> >       </init-param>
> >       <init-param>
> >               <param-name>sortDirectoriesFirst</param-name>
> >               <param-value>true</param-value>
> >       </init-param>
> >       <init-param>
> >               <param-name>fileEncoding</param-name>
> >               <param-value>UTF-8</param-value>
> >       </init-param>
> >       <load-on-startup>1</load-on-startup>
> > </servlet>
> >
> > <servlet-mapping>
> >       <servlet-name>webdav</servlet-name>
> >       <url-pattern>/*</url-pattern>
> > </servlet-mapping>
> >
> >       <security-constraint>
> >               <web-resource-collection>
> >                       <web-resource-name>WebDAV</web-resource-name>
> >                       <url-pattern>/*</url-pattern>
> >               </web-resource-collection>
> >               <auth-constraint>
> >                       <role-name>Foo Maintainer</role-name>
> >                       <role-name>Bar Maintainer</role-name>
> >                       <role-name>Baz Maintainer</role-name>
> >               </auth-constraint>
> >       </security-constraint>
>
> and the context.xml (for backend-dev):
> > <?xml version="1.0" encoding="UTF-8"?>
> > <Context>
> >       <Listener 
> > className="org.apache.catalina.core.PropertiesRoleMappingListener" />
> >
> >       <Valve 
> > className="net.sf.michaelo.tomcat.authenticator.SpnegoAuthenticator"
> >               loginEntryName="tomcat-accept" 
> > sendAuthInfoResponseHeaders="true" />
> >
> >       <Realm 
> > className="net.sf.michaelo.tomcat.realm.PacDataActiveDirectoryRealm"
> >               loginEntryName="tomcat-accept" />
> >
> >       <Resources>
> >               <PostResources base="/var/foo/backend-dev"
> >                       
> > className="org.apache.catalina.webresources.DirResourceSet"
> >                       webAppMount="/" />
> >       </Resources>
> > </Context>
>
> It just works from the browser, CarotDAV, the Windows Explorer, and 
> py-webdavclient3.
>
> Now my question/concern is the Javadoc of the servlet [1] says:
> > The WebDAVServlet must not be used as the default servlet (ie mapped to 
> > '/') as it will not work in this configuration.
>
> Well, it works, doesn't it? And the sample below maps to root as well:
> >   <servlet-mapping>
> >     <servlet-name>webdav</servlet-name>
> >     <url-pattern>/*</url-pattern>
> >   </servlet-mapping>
>
> So what is it now, can I safely use the servlet with this setup?
> There is nothing else in this WAR file except context.xml, web.xml and
> a properties file.

/* mapping is very different from /. / is the default servlet. /* is
not and has a priority over it.
The javadoc which you linked to has a mapping example of the WebDAV
servlet using /*, which is 100% ok.

Rémy

> Michael
>
> [1] 
> https://tomcat.apache.org/tomcat-9.0-doc/api/org/apache/catalina/servlets/WebdavServlet.html
>
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