How to log response body in nginx access log

lyzhang87 · 2014-05-22T03:03:31+00:00

Thank you very much. I will try it.Pada Jumat, 23 Mei 2014 1:52:57 UTC+7, agentzh menulis:Hello! On Thu, May 22, 2014 at 8:29 AM, nandez darras wrote: >...

How to log response body in nginx access log

lyzhang87

I want to log all requests(post body included) and responses in a log, I saw I can use "ngx.log()", but it will output in error log, is there a good way to log all requests and responses in access log?

Thanks!

agentzh

Hello!

On Tue, May 20, 2014 at 11:29 PM,  lyzhang87 wrote:
> I want to log all requests(post body included) and responses in a log, I saw
> I can use "ngx.log()", but it will output in error log, is there a good way
> to log all requests and responses in access log?
>

You can use the $request_body variable in the standard log_format directive:

    http://nginx.org/en/docs/http/ngx_http_log_module.html#log_format

BTW, when your request body is large enough to be buffered to a
temporary file, the value of $request_body would be empty. See
http://nginx.org/en/docs/http/ngx_http_core_module.html#var_request_body

Regards,
-agentzh

luojiaoscu

how about the response body？ is there any module can accomplish this task?

thanks

-nevin

在 2014年5月22日星期四UTC+8上午3时06分13秒，agentzh写道：

Hello!

On Tue, May 20, 2014 at 11:29 PM, lyzhang87 wrote:
> I want to log all requests(post body included) and responses in a log, I saw
> I can use "ngx.log()", but it will output in error log, is there a good way
> to log all requests and responses in access log?
>

You can use the $request_body variable in the standard log_format directive:

http://nginx.org/en/docs/http/ngx_http_log_module.html#log_format

BTW, when your request body is large enough to be buffered to a
temporary file, the value of $request_body would be empty. See
http://nginx.org/en/docs/http/ngx_http_core_module.html#var_request_body

Regards,
-agentzh

agentzh

Hello!

On Thu, Aug 21, 2014 at 11:40 PM,  luojiaoscu wrote:
>
> how about the response body？  is there any module can accomplish this task?

Response bodies can be huge. So logging such things can be very
expensive. Are you sure you want to do this?

Technically speaking, you could use body_filter_by_lua [1] to write
response data chunks to your own files without the overhead of
buffering all the response body data in memory. But still, this is
rather expensive due to the potentially large amount of data.

BTW, please subscribe to this list before posting. See
http://openresty.org/#Community

Regards,
-agentzh

[1] https://github.com/openresty/lua-nginx-module#body_filter_by_lua