ngx_event_pipe_output_filter_pt 20 event/ngx_event_pipe.h typedef ngx_int_t (*ngx_event_pipe_output_filter_pt)(void *data, ngx_event_pipe_output_filter_pt 46 event/ngx_event_pipe.h ngx_event_pipe_output_filter_pt output_filter; ngx_event_pipe_output_filter_pt 2204 http/ngx_http_upstream.c p->output_filter = (ngx_event_pipe_output_filter_pt) ngx_http_output_filter;