Bugs item #636920, was opened at 2002-11-12 02:32
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Category: None
Group: v3.0 Rabbit Hole
Status: Open
Resolution: None
Priority: 5
Submitted By: Jeff Miner (jeff_miner)
Assigned to: Nobody/Anonymous (nobody)
Summary: JSP INCLUDE
Initial Comment:
v 3.0.4
See my previous #594563 which starksm closed.
Inclusion of JSP using RequestDispatcher causes
included content to jump to top of page.
He claims this was fixed, yet the latest, greatest
download (v 3.0.4) exhibits the same behavior.
Do I need to upgrade Jetty separately?
One can flush the out buffer in the JSP before
including, but I need to do this in the object, not in
the JSP. Why doesn't the RequestDispatcher know
how to do this?
----------------------------------------------------------------------
>Comment By: Jeff Miner (jeff_miner)
Date: 2002-11-13 20:17
Message:
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user_id=592596
Here is the basic layout of the problem
******Containing Page*******
....<table><tr><td>
<%= myObject.getOutput(request, response) %>
</td></tr></table>...
******* Object ********
public String getOutput(HttpServletRequest request,
HttpServletResponse response) {
RequestDispatcher dispatch =
context.getRequestDispatcher("someJSP.jsp");
try {
dispatch.include(request, response);
} catch(Exception e){}
return "";
*************
I am beginning to understand the extent of the
mishmosh of writers, etc. but it seems to me that the
encapsulating objects should handle these issues.
My point is essentially that a call to
RequestDispatcher.include() really ought to do exactly
the same thing as a <jsp:include>. It doesn't, though.
----------------------------------------------------------------------
Comment By: Greg Wilkins (gregwilkins)
Date: 2002-11-13 00:20
Message:
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Can you give us a pair of JSPs that exhibit this problem?
The following URL to the jetty demo site shows that it does
work at least for all the examples that I have.
http://jetty.mortbay.org/jetty/dispatch/include/snoop.jsp
Remember that request dispatching, JSPs, writers and
outputstreams all form a complex little mishmash of
buffering vs flushing (which slows
down performance a lot). You may have some content that
you think has been written to the response before the
include, but it is actually still in a JSP or writer buffer
somewhere (outside the control of Jetty!). I think JSPs do
have some mechanisms for controlling this.
----------------------------------------------------------------------
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