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https://issues.apache.org/jira/browse/SLING-2325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13192193#comment-13192193
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Felix Meschberger commented on SLING-2325:
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Implemented this proposal in Rev. 1235287

Going to do further tests...
                
> SlingDavExServlet uses impersonation to get session. Doesn't work nicely if 
> user doesn't have right to impersonate.
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: SLING-2325
>                 URL: https://issues.apache.org/jira/browse/SLING-2325
>             Project: Sling
>          Issue Type: Bug
>          Components: JCR
>    Affects Versions: JCR DavEx 1.0.0
>            Reporter: Christanto
>            Assignee: Justin Edelson
>            Priority: Blocker
>              Labels: davex
>             Fix For: JCR DavEx 1.1.0
>
>
> SlingDavExServlet uses impersonation to get session. Doesn't work nicely if 
> user doesn't have right to impersonate.
> LoginException will be thrown: javax.jcr.LoginException: attempt to 
> impersonate denied for <user>
> Code excerpt from SlingDavExServlet:
> final Session session = resolver.adaptTo(Session.class);
> // as the session might be longer used by davex than the request
> // we have to create a new session!
> if ( session != null ) {
>     final Credentials credentials = new 
> SimpleCredentials(session.getUserID(), EMPTY_PW);
>     final Session newSession = session.impersonate(credentials);
>     return newSession;
> }

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