C�dric Janssens wrote:
> I can't find this in JSP SPEC 1.0 May 28, 1999 page 64!
>
Check the 1.0 public release version, dated August 13, 1999, Section 2.13.4
(page 61).
>
> Nonetheless, what is the impact of a flush="true" ?
>
The accumulated output of the calling page is flushed before the inclusion is
started. Among other things, this commits the headers.
>
> Does that mean that I will ne longer be able to change the HTTP header (for
> example sending a redirect ?) in my servlet? (see the example below)
>
The 1.0pr release is very clear about this, in the section mentioned above:
An included page only has access to the JspWriter object
and it cannot set headers. This precludes invoking methods
like setCookie(). A request-time Exception will be raised
if this constraint is not satisfied. The constraint is equivalent
to the one imposed on the include() method of the
RequestDispatcher class.
Because doing a redirect means setting HTTP headers, you will not be able to do
this from within an included servlet or JSP page.
Craig
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