Static gzip

[Igor Sysoev]

On Wed, Dec 26, 2007 at 05:10:53PM +0300, Igor Sysoev wrote:

> On Sat, Dec 22, 2007 at 04:54:20PM -0500, Ben Maurer wrote:
> 
> > I'm trying to gzip static files in nginx (without compressing the file 
> > each time). I'd like to do this for two reasons:
> > 
> > 1) The files we're serving are very frequently requested, we'd prefer 
> > the CPU savings of not having to compress the files
> > 2) We actually find that we get a good savings by using advdef (a gzip 
> > encoder that uses 7zip to increase the compression ratio).
> > 
> > So far, I've found that doing this works:
> > 
> > 	 set $okstring "";
> > 
> >          if ($http_accept_encoding ~ "gzip") {
> > 	    set $okstring "$okstring header";
> > 	 }
> > 
> > 	 if (-f $document_root/$document_uri.gz) {
> >             set $okstring "$okstring file";
> > 	 }
> > 
> > 	 if ($okstring = " header file") {
> > 	    rewrite "^(.*).js$" "$1.js.gz";
> > 	 }
> > 
> > 	 location ~ .*\.js.gz {
> > 	 	  types { text/javascript gz; }
> > 	 	  add_header Content-Encoding gzip;
> > 		  add_header Vary Accept-Encoding;
> > 	 }
> > 
> > However, this isn't the cleanest solution.
> > 
> > I was trying to find a good way to write a module that did this, but 
> > couldn't figure out a way to intercept the request when it had been 
> > mapped to a physical path. What's the best way to go about writing a 
> > module that does this?
> 
> It's simple content module (like ngx_http_static_module), that should be
> set just before ngx_http_static_module. It should look $request_filename.gz
> file. I will probably implement it soon.
> They should be controlled via
> 
>       gzip_static  on;
> 
> and should take into account the already existent directives:
> 
>       gzip_http_version   ...
>       gzip_proxied        ...
>       gzip_vary           ...

I've written the module, it will be in the next release.


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