gzip bwtween apache and backend server

[Weilt <gu...@gmail.com>]

Hi,

Currently I'm setting up apache as a reverse proxy. The problem is I want to
make sure the content of http communication between apache and backend
server  are always gzipped, even if the client browser doesn't support gzip
or doesn't send "Accept-Encoding:gzip,deflate" header. If apache gets
gzipped content from backend server and notice the original client request
doesn't contain  "Accept-Encoding:gzip,deflate" header, it need to inflate
the content and send it to user.

My question is, what's the minimum effort to achieve this goal. I tried
mod_deflate, and found it always follow accept-encoding header from client.
I used gdb to trace it and found that inflate and deflate only apply to the
original request. The fake request made by mod_proxy isn't affected. Another
problem is I used "SetInputFilter  DEFLATE", gdb breakpoint on
deflate_in_filter function, but it still didn't work,the content was still
ungzipped.

So how can I  write a module to achieve this, what's the major points? I
have written simple input and output filters.

Thanks a lot!


gushaow

Re: gzip bwtween apache and backend server

[Weilt <gu...@gmail.com>]

And how to force the proxy to send out gzipped post request to  bakcend
server?

2006/12/3, Nick Kew <ni...@webthing.com>:
>
> On Sun, 3 Dec 2006 00:35:47 +0800
> Weilt <gu...@gmail.com> wrote:
>
> > So how can I  write a module to achieve this, what's the major
> > points? I have written simple input and output filters.
>
> Just use the RequestHeader directive to set Accept-Encoding.
>
> A RewriteCond can check the original Accept-Encoding,
> so you know if the proxy has to uncompress it.
>
> --
> Nick Kew
>
> Application Development with Apache - the Apache Modules Book
> http://www.apachetutor.org/
>

Re: gzip bwtween apache and backend server

[Nick Kew <ni...@webthing.com>]

On Sun, 3 Dec 2006 00:35:47 +0800
Weilt <gu...@gmail.com> wrote:

> So how can I  write a module to achieve this, what's the major
> points? I have written simple input and output filters.

Just use the RequestHeader directive to set Accept-Encoding.

A RewriteCond can check the original Accept-Encoding,
so you know if the proxy has to uncompress it.

-- 
Nick Kew

Application Development with Apache - the Apache Modules Book
http://www.apachetutor.org/