[FELIX-3988] FilterHandler does not handle return of context.handleSecurity() correctly

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: http-2.2.0
• Fix Version/s: http-2.3.0
• Component/s: HTTP Service
• Assignee: J.W. Janssen
• Reporter: Kaspar von Gunten
• Created: 21/Mar/13 15:53
• Updated: 27/Feb/18 14:46
• Resolved: 27/Feb/18 14:46

Description

This is somewhat similar to FELIX-2768, but not resolved.

The JavaDoc for HttpContext.handleSecurity states:

• When this method returns false, the Http Service will send the response back to the client, thereby
• completing the request. When this method returns true, the Http Service will proceed with servicing the
• request.

The current FilterHandler impl is as follows:

if (!getContext().handleSecurity(req, res)) {
res.sendError(HttpServletResponse.SC_FORBIDDEN);
} else {
this.filter.doFilter(req, res, chain);
}

1) This does not comply to the above doc, because the context might have set a status/error code and prepared everything correctly to be returned. Sending an error will overwrite the prepared headers and status.

2) Some context implementations are a bit eager and already send the response back before they return "false" from the above method. The current implementation will then lead to an IllegalStateException, because the response has already been committed. In order to be more robust, there should be a if(!res.isCommitted())-block around the handling of the "false" return value.

I attached a patch for the second aspect of the issue, but couldn't resolve the first part, because - as it is at the moment - there seems to be no way to check if there is already a status set on the resource (no getStatus() or isStatusSet() method).

Ideally the fix should be something like:

if (!res.isCommitted() && !res.isStatusSet()) {
res.sendError(SC_FORBIDDEN);
}