3 messages in ru.sysoev.nginxRe: twice chunked| From | Sent On | Attachments |
|---|---|---|
| HajoLOcke | Aug 10, 2011 6:41 am | |
| Ensiferous | Aug 10, 2011 7:22 am | |
| Maxim Dounin | Aug 10, 2011 7:45 am |
| Subject: | Re: twice chunked | |
|---|---|---|
| From: | Maxim Dounin (mdou...@mdounin.ru) | |
| Date: | Aug 10, 2011 7:45:08 am | |
| List: | ru.sysoev.nginx | |
Hello!
On Wed, Aug 10, 2011 at 09:42:29AM -0400, HajoLOcke wrote:
Hello,
i use nginx 1.1.0 as balancer in front of some apache-server. In some cases, where the apache is generating bigger pages it sends content as chunked, nginx is adding a second "chunked" to http-response header. This is confusing Browsers and looks like:
Transfer-Encoding: chunked, chunked
nginx is compiled with: nginx: nginx version: nginx/1.1.0 nginx: TLS SNI support enabled nginx: configure arguments: --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --pid-path=/var/run/nginx.pid --lock-path=/var/lock/nginx.lock --http-log-path=/var/log/nginx/access.log --http-client-body-temp-path=/var/lib/nginx/body --http-proxy-temp-path=/var/lib/nginx/proxy --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --with-debug --with-http_stub_status_module --with-http_flv_module --with-http_ssl_module --with-http_dav_module --with-http_gzip_static_module --with-http_realip_module --with-mail --with-mail_ssl_module --with-ipv6 --add-module=/usr/src/nginx-1.1.0-1/modules/nginx-upstream-fair
What can id do to avoid this double chunked in header? Parts of conf needed? ( no special stuff in it)
There are two basic options:
1. Fix backend to actually complain to HTTP specification (i.e. do not send chunked responses to HTTP/1.0 requests). You may try
SetEnv downgrade-1.0
in Apache config. Alternatively, grep your php scripts for things like
header("HTTP/1.1 ...");
and change them to be "HTTP/1.0 ..." (the problematic Apache behaviour is caused by PHP module which sets r->proto_num to 1.1 if script uses header("HTTP/1.1 ..."), it should never ever do that).
2. Try patch which adds HTTP/1.1 support in nginx proxy module, see here:
http://mailman.nginx.org/pipermail/nginx/2011-August/028324.html
With the patch nginx understands chunked from http backends and everything should be fine even if backend sends chunked over HTTP/1.0 (you just need to compile with patch, no further actions related to keepalive upstream connections required).
Maxim Dounin
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