Hi Andres,
Hope you won't mind this question.
Where's GZIPOutputStream class available?
Thanks.
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Ashwath Narayan A
Torry Harris Business Solutions
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----- Original Message -----
From: Andr�s Aguiar <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, August 09, 1999 3:45 PM
Subject: Re: Compressing the output of a servlet - SOLUTION
> I've solved the problem, so I'm posting the solution in the list because I
> think it's pretty useful.
>
> Background: HTTP request have an 'Accept-Encoding' header that tells the
> HTTP server what kind of encoding does the browser accept. One of the
> possible encodings is 'gzip'. If the browser accepts that kind of
encoding,
> you can compress the output of the servlet using a GZipOutputStream, and
the
> browser will decompress it on the fly.
>
> It's pretty simple to do it:
>
> // htmlOut is a StringBuffer with the data to print in the HTML page.
> res/req are the HttpServletResponse/Request
>
> String acceptEncoding = req.getHeader("Accept-Encoding");
> if (acceptEncoding != null && acceptEncoding.indexOf("gzip") >= 0)
> {
> res.setHeader("Content-Encoding", "gzip");
>
> GZIPOutputStream gzOut = new
GZIPOutputStream(res.getOutputStream());
> gzOut.write(htmlOut.toString().getBytes());
> gzOut.close();
> res.getOutputStream().close();
> }
> else
> {
> res.getWriter().print(htmlOut);
> res.getWriter().close();
> }
>
> I've tried with NS 4.06, NS 4.6, IE 5 and IE 4 in WindowsNT. All of them
> report that accept the 'gzip' encoding, and they display the compressed
page
> correctly. NS 3, NS 2 and Opera report that they don't support the 'gzip'
> encoding. So, it seems that they have a consistent behavior.
>
> If anyone tries this and finds a browser that is inconsistent (ie it
reports
> it supports gzip but it doesn't), please let me know.
>
> Regards.
>
> > -----Original Message-----
> > From: A mailing list for discussion about Sun Microsystem's
> > Java Servlet
> > API Technology. [mailto:[EMAIL PROTECTED]]On
> > Behalf Of Heiko
> > Grussbach
> > Sent: Monday, August 09, 1999 8:36 AM
> > To: [EMAIL PROTECTED]
> > Subject: Re: Compressing the output of a servlet
> >
> >
> > Hi Andr�s,
> >
> > I havent used compression myself, but info may be found in J. Hunters
> > servlet book on page 189. According to this, you need to set
> > the content
> > header of the response to x-gzip or x-compress (not just to
> > gzip as you
> > do).
> > Also, revise your check for the the header, it might return
> > null in which
> > case your first line would fail with a NullPointerException.
> > Please tell me if you get it working!!
> >
> > Regards
> >
> > Heiko
> > [EMAIL PROTECTED]
> >
> >
> >
> >
> >
> > Andr�s Aguiar <[EMAIL PROTECTED]> on 07-08-99 11:53:47
> >
> > Please respond to "A mailing list for discussion about Sun
> > Microsystem's
> > Java Servlet API Technology."
> > <[EMAIL PROTECTED]>
> >
> > To: [EMAIL PROTECTED]
> > cc: (bcc: Heiko Grussbach/NMG/CRP-HT)
> >
> > Subject: Compressing the output of a servlet
> >
> >
> >
> > Content-type: text/plain; charset
> >
> > I'm trying to send the output of my servlet compressed to the browser,
> > depending on the 'Accept-Encoding' header in the HTTP request.
> > I've followed the HTTP1.1 spec, but it seems that I'm doing something
> > wrong.
> > This is the code I'm using:
> > file://-----------------------------
> > // htmlOut is a StringBuffer that has the data to send to the browser.
> > if (req.getHeader("Accept-Encoding").indexOf("gzip") >{
> > res.setHeader("Content-Encoding", "gzip");
> > res.setHeader("Transfer-Encoding","chunked");
> > res.getOutputStream().write(new
> > String(Long.toHexString(htmlOut.length()).toUpperCase() +
> > "\r\n").getBytes());
> > GZIPOutputStream gzOut
> > GZIPOutputStream(res.getOutputStream());
> > gzOut.write(htmlOut.toString().getBytes());
> > gzOut.close();
> > res.getOutputStream().write(new
> > String("\r\n0\r\n\r\n").getBytes());
> > res.getOutputStream().close();
> > }
> > file://---------------------
> > If someone was able to do it, send me a clue.
> > Regards.
> > ______________________________________________________________
> > _____________
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>
>
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