Cannot post large body.

[azuryyu]

I found that echo-module cannot print nginx log when I post a large body,(not so large, such as more than 20K);

Everything works fine if I post a client body smaller than 1kb, there are good Nginx logs.
It doesn't work If client body size is more than several TEN KB bytes. the client body is '-' in the Nginx log.

I've added 'echo_read_request_body;' in the location to avoid an empty $request_body because Nginx may save client body to a temp file;
I've configured following in my Nginx.conf:

client_max_body_size 1024M;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;

[agentzh]

@azuryyu The standard $request_body variable of the nginx core won't read large request bodies buffered on the disk (by the nginx core).

See https://github.com/openresty/echo-nginx-module#echo_request_body

[agentzh]

@azuryyu For meaningful values in $request_body, you should configure client_body_buffer_size as well. It's more about the nginx core's $request_body behavior. I'm tired of educating people on standard nginx behaviors. alas.

[azuryyu]

I've configured client_body_buffer_size = 10m before I submitted this issue.