upstream_response_length and upstream_addr can't work

[lx]

Hi:
    When we use module of slice,  the nuber of bytes from upstream server
is more than the bytes which sent to client,   So I want to get the number
of  bytes from upstream server, How to get it?

Thank you

Roman Arutyunyan <arut at nginx.com> 于2019年11月26日周二 下午9:10写道：

> Hi,
>
> On Tue, Nov 26, 2019 at 07:24:00PM +0800, lx wrote:
> > hi all:
> >      When I use module of slice,  upstream_response_length and
> > upstream_addr can't work.
> > nginx.conf :
> > #########################################################################
> >   include       mime.types;
> >     default_type  application/octet-stream;
> >
> >     log_format  main
> >
> '$status^$scheme^$request^$body_bytes_sent^$request_time^$upstream_cache_status^$remote_addr^$http_referer^$http_user_agent^$content_type^$http_range^$cookie_name^$upstream_addr^$upstream_response_time^$upstream_bytes_received^$upstream_response_length^[$time_local]';
> >
> >
> >     access_log  logs/access.log  main;
> >     rewrite_log on;
> >
> >     sendfile        on;
> >     aio             threads;
> >
> >     keepalive_timeout  65;
> >
> >  if ($uri ~ ^/([a-zA-Z0-9\.]+)/([a-zA-Z0-9\.]+)/(.*)) {
> >       set $cdn $1;
> >       set $new_host $2;
> >      set $new_uri  $3;
> > }
> >
> >         location / {
> >             slice 1m;
> >             proxy_cache_lock on;
> >             proxy_cache my_cache;
> >             proxy_cache_key $uri$is_args$args$slice_range;
> >             proxy_set_header Range $slice_range;
> >            proxy_cache_valid 200 206 24h;
> >            proxy_pass http://$cdn/$new_uri;
> >         }
> > #########################################################################
> > I Initiate a rang htttp request, for example
> > #########################################################################
> >  curl -o result -H 'Range: bytes=2001-4932000' "
> >
> http://127.0.0.1:64002/A.com/B.com/appstore/developer/soft/20191008/201910081449521157660.patch
> > "
> > #########################################################################
> > upstream_response_length and upstream_bytes_received is just 1 MB, not
> > 4.9MB.  I find nginx build 5 http request to A.com by tcpdump, and nginx
> > implement slice by subrequest.
> >
> > This is why? How to fix it?
>
> Yes.  When using the slice module,  response is served by multiple
> subrequests.
> Each subrequest serves its own part.  It has a separate cache key, fetches
> a
> separate cache entry and contacts the upstream server using a serparate
> connection.  When you use an $upstream_XXX variable, it returns data from
> a subrequest.
>
> If you want combined numbers, use client-side variables like $bytes_sent
> instead.
>
> >
> > Thank you
>
> > _______________________________________________
> > nginx mailing list
> > nginx at nginx.org
> > http://mailman.nginx.org/mailman/listinfo/nginx
>
>
> --
> Roman Arutyunyan
> _______________________________________________
> nginx mailing list
> nginx at nginx.org
> http://mailman.nginx.org/mailman/listinfo/nginx
>
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