> From: André Warnier [mailto:[EMAIL PROTECTED]
> Subject: Re: setHeader after DoFilter delegation in filter?
>
> To create output for the client, the application calls
> something, right? (I mean a method of HttpRequest).

Not quite - you're confusing request with response.  There are methods in 
HttpServletResponse - an Interface, not a class - to obtain a PrintWriter or 
ServletOutputStream that the webapp uses to generate data to be sent to the 
client at some point in the future.  The data isn't sent until flushBuffer(), 
sendError(), or sendRedirect() are called.  Since the 
HttpServletResponseWrapper class implements the interface, those methods are 
available via the wrapper.  The filter needs to subclass the wrapper in order 
to subvert anything else in the filter/servlet chain.

 - Chuck


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