[Helma-user] Suggestion on how to GZIP a response?

[Maksim Lin for technical support mailling lists]

Hi Kris,

This article
(http://www.onjava.com/pub/a/onjava/2003/11/19/filters.html)
describes the implementation of a servlet filter to do gzip responses.

>From a *very quick* look at the code it looks fairly straight forward. 

Looks like you need code to check if the client will accept gzip:

HttpServletRequest request = (HttpServletRequest) req;
String ae = request.getHeader("accept-encoding");
if (ae != null && ae.indexOf("gzip") != -1) { 
...

and then when you write your response:

HttpServletResponse response =
          (HttpServletResponse) res;
this.output = response.getOutputStream();
baos = new ByteArrayOutputStream();
gzipstream = new GZIPOutputStream(baos);
gzipstream.write((byte)b);
...

The above is in Java rather then js (in helma for instance you would do
just do req.getHeader() to get a HTTP header, etc), but hopefully it
gives the idea.
I use apache as a front-end too, so I don't have any immediate need for
this, but I could have a quick go at writing up a little module to do
this if there is interest.
Actually I think this functionality would actually be better of inside
helma core code and then just activiated for each app with a setting in
app.properties, espeically given the small size of Java code needed to
implement it.

Maks.


> -----Original Message-----
> From: helma-user-bounces at helma.org 
> [mailto:helma-user-bounces at helma.org] On Behalf Of Kris Leite
> Sent: Thursday, 16 August 2007 06:09
> To: Helma User Mailing List
> Subject: Re: [Helma-user] Suggestion on how to GZIP a response?
> 
> Thanks for the suggestion but no, I am not using a proxy.
> 
> Thanks,
> Kris
> 
> Joshua Paine wrote:
> > Kris Leite wrote:
> >  
> >> I was wondering if anybody has a suggestion on how to 
> configure Helma 
> >> to GZIP the responses?
> >>    
> >
> > If you're proxying through apache, it's as easy as enabling 
> > mod_deflate in your server and adding this to your virtual host:
> >
> > SetOutputFilter DEFLATE
> >
> > I have no idea otherwise, though.
> > _______________________________________________
> > Helma-user mailing list
> > Helma-user at helma.org
> > http://helma.org/mailman/listinfo/helma-user
> >
> >  
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>