gzip enabling for selective browsers

[Igor Sysoev]

On Wed, Sep 05, 2007 at 11:39:37PM +0800, Steve Chu wrote:

> We try to use ngx_http_gzip_module in our high-load site serving for
> static js and css files. But that run a very high cpu level, seems
> that no gzipped file cache in local, it just compresses instantly
> every request.

Yes, nginx gzips on the fly without any cache.

> Is there any planned feature of ngx_http_gzip_module that for local cache?

Yes, after usual cache will be implemented.

> On 9/5/07, Igor Sysoev <is at rambler-co.ru> wrote:
> > On Wed, Sep 05, 2007 at 10:57:57PM +0800, Steve Chu wrote:
> >
> > > we have added a new variable, "http_accept_encoding".
> > > Just patch the ngx_http_variables.c source file in ngx_http_core_variables[]:
> > >
> > > { ngx_string("http_accept_encoding"), NULL, ngx_http_variable_header,
> > >       offsetof(ngx_http_request_t, headers_in.accept_encoding), 0, 0 },
> >
> > There is no need to add this variable because it already exists:
> > any client header is available as $http_... Some frequently used variables
> > such as $http_host, $http_user_agent, etc. are defined explicitly in
> > ngx_http_variables.c to speed up search.
> >
> > > So, you can using in configure file:
> > >
> > > if ($http_accept_encoding ~* "gzip") {
> > >        ...
> > >    }
> >
> > ngx_http_gzip_module always tests "Accept-Encoding" for gzip, so
> > this test is not needed.
> >
> > > On 9/5/07, Igor Sysoev <is at rambler-co.ru> wrote:
> > > > On Tue, Sep 04, 2007 at 06:53:32PM +0200, Roxis wrote:
> > > >
> > > > > On Tuesday 04 September 2007, Ezra Zygmuntowicz wrote:
> > > > > >     So nginx cannot selectively gzip based on browser, can it turn off
> > > > > > gzip inside a location /foo {} block?
> > > > >
> > > > > location / {
> > > > >     if ($http_user_agent ~ MSIE) {
> > > > >         gzip off;
> > > > >     }
> > > > > }
> > > >
> > > > It may be set so, but as any configuration inside "if" has drawbacks.
> > > >
> > > >
> > > > --
> > > > Igor Sysoev
> > > > http://sysoev.ru/en/
> > > >
> > > >
> > >
> > >
> > > --
> > > Steve Chu
> > > http://stvchu.org
> > >
> >
> > --
> > Igor Sysoev
> > http://sysoev.ru/en/
> >
> >
> 
> 
> -- 
> Steve Chu
> http://stvchu.org
> 

-- 
Igor Sysoev
http://sysoev.ru/en/