Side Channel

http://www.ruby-forum.com/topic/152435

Encountered weird bug when an Ubuntu Hardy apache returns 404 to nginx, nginx will add extra bytes to the content. Bug sounds exactly like described in the above link -- both Apache and nginx added a "Transfer-encoding: chunked" to the content, effectively encoding it twice. Not sure if the fault lies within Apache2's HTTP/1.0 handling of chunked transfer encoding, or nginx, but Igor Sysoev (the creator of nginx) whipped up a quick patch to fix it. "Be liberal in what you accept, and conservative in what you send."

Seems like Ubuntu Hardy's nginx-0.5.33 does not have the hack/patch, and neither does the author's official nginx-0.6.32, so I did

apt-get source nginx

and then grab the original nginx-0.6.32, and applied patched in the forum. dpkg-buildpackage it. Screwed up the proper .deb creation process, and got an nginx_0.5.33-1_amd64.deb instead of nginx_0.6.32-chunkedhack_amd64.deb

dpkg -i installed it just fine though, and the our problem went away.

Attached is the hacked .deb (amd64) It works, but it's a hack. Might do a proper one sometime. Not sure to push upstream though, as even the devel version of nginx doesn't have that patch.