ngx_http_upstream_handler_pt  245 http/ngx_http_upstream.h typedef void (*ngx_http_upstream_handler_pt)(ngx_http_request_t *r,
ngx_http_upstream_handler_pt  250 http/ngx_http_upstream.h     ngx_http_upstream_handler_pt     read_event_handler;
ngx_http_upstream_handler_pt  251 http/ngx_http_upstream.h     ngx_http_upstream_handler_pt     write_event_handler;