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;