bugfix: we incorrectly returned 500 in body filters. bugfix: we forgot to check the returned pointer from ngx_calloc_buf in the body filter.
bugfix: we incorrectly returned 500 in body filters. bugfix: we forgot to check the returned pointer from ngx_calloc_buf in the body filter.

openresty/echo-nginx-module,openresty/echo-nginx-module,openresty/echo-nginx-module