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writing to response stream from action

Posted on 2004-03-30
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Last Modified: 2008-03-10
trying to call an action in a jsp page to return some html on http response stream, but it doesn't seem to like it.  i am using the itext library's html writer.

i have an action-mapping where /ledger.do maps to Ledger.class which is an action.
in ledger.jsp:
<jsp:include page="/ledger.do" />

in Ledger.java:
ServletOutputStream out = response.getOutputStream();
response.setContentType("text/html");
HtmlWriter.getInstance(document, out);

the problem is that the http headers have already been sent so...
is there any way to write html back to the response stream?
I don't mind changing class type to httpservlet.
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Question by:MitchBroadhead
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7 Comments
 
LVL 7

Expert Comment

by:searlas
ID: 10713534
Use getWriter, not getOutputStream and you won't have a problem.
(the jsp's implicit out variable is a wrapper (indirectly) for response.getWriter - and you cannot call both getWriter and getOutputStream without throwing an exception (according to the specs))
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LVL 7

Expert Comment

by:searlas
ID: 10713543
Think I misinterpreted your question.

Have you tried increasing the buffer in the jsp page (thereby giving your action and itext more chance of altering the headers before they are written)
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LVL 35

Expert Comment

by:TimYates
ID: 10713560
I think you will need to write a servlet, not a Struts action to do this task...
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LVL 1

Author Comment

by:MitchBroadhead
ID: 10713645
ideally i would like to output to the http stream without headers, to allow the html to be embedded into the page
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LVL 1

Author Comment

by:MitchBroadhead
ID: 10715844
fixed

used ByteArrayOutputStream to store the output of itext htmlwriter, then usedbaos.toString() to pump into response.getWriter().
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