On Sun, Mar 22, 2009 at 09:23:49PM -0400, Philippe M. Chiasson wrote:
> On 22/3/09 15:25, Louis-David Mitterrand wrote:
> > Hi,
> >
> > I noticed something interesting with mod_deflate when serving binary
> > content from a mason component:
> >
> > <%init>
> > $m->clear_buffer();
> > $r->content_type("video/mp4");
> > $r->headers_out->add('Content-length' => -s $file);
> > $r->sendfile($file);
> > $m->abort(200);
> > </%init>
> >
> > mod_deflate is enabled with the default:
> >
> > AddOutputFilterByType DEFLATE text/html text/plain text/xml
> >
> > and .md mason components have:
> >
> > AddType text/html .md
> >
> > But when I change the content-type from within the component mod_deflate
> > doesn't seem to notice and keeps gzip'ing the video/mp4 output, which
> > FlowPlayer doesn't appreciate.
> >
> > I certainly could disable mod_deflate and be on my merry way.
> >
> > But I thought I'd ask the modperl list (already posted to mason-users)
> > whether this mod_deflate behaviour is expected and/or normal?
>
> Sounds like Mason runs exclusively in the PerlResponse phase, at which
> point, AddOutputFilterByType has already decided if it should apply the
> filter or not, so it's too late to change that.
>
> One easy way to disable mod_deflate from that point in time, from mason,
> would be to do:
>
> $r->subprocess_env('no-gzip' => 1);
>
> Since from mod_deflate.c:
>
> /* some browsers might have problems, so set no-gzip
> * (with browsermatch) for them
> */
> if (apr_table_get(r->subprocess_env, "no-gzip")) {
> ap_remove_output_filter(f);
> return ap_pass_brigade(f->next, bb);
> }
>
> Give it a try, this is untested!
And this works fine! Thank you.
Another possible (less robust) solution is to add this to deflate.conf:
SetEnvIfNoCase Request_URI \.mp4$ no-gzip dont-vary
This only works if the $r->uri ends with .mp4 which in my case does
because I use an explicit $r->path_info:
/video.md/directory/file.mp4
"/directory/file.mp4" points to a directory hierarchy outside of the
ServerRoot.
Cheers,
--
http://www.critikart.net
