Hi Guys,
If any one of u have used this GZIPOutputStream in servlets
in order to zip outstream objects (response), please help me out as
I'm getting this following problem while trying to zip a response and then
"forwarding". To be more specific,
The implementation of GZIPOutputStream in the
ControllerServlet has the following problems. The piece of code we
introduced in the "service" method of the servlet is as follows:
OutputStream out = null;
if(req.getHeader("Accept-Encoding").indexOf("gzip")!=-1)
{
if(req.getHeader("Accept-Encoding").indexOf("x-gzip")!=-1){
res.setHeader("Content-Encoding", "x-gzip");
}
else
{
res.setHeader("Content-Encoding", "gzip");
}
System.out.println("Serving the xml
in GZIP format");
out = new
GZIPOutputStream(res.getOutputStream());
}
else {
System.out.println("imnside normal
stream");
out = res.getOutputStream();
}
out.flush();
out.close();
The code is compiling, but at run-time, when the
first "forward" method is encountered (forwarding to a JSP) , the following
exception is thrown: "IllegalStateException, cannot forward a request for
which a ServletOutputStream or PrintWriter has already been obtained".
Now, when we replaced the "forward" method with
"include", the control is going to the JSP page and fails there. The
exception thrown is like this: "IllegalStateException, OutputStream used".
It was suggested that since we are already obtaining the
OutputStream object from the response object, the JSP, which is expecting
the usual request object is not being able to recognise the outputstream
object. Then how do we tackle this particular problem?
Regards,
Gomes
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