ngx_http_file_cache_set_header  131 http/ngx_http_cache.h void ngx_http_file_cache_set_header(ngx_http_request_t *r, u_char *buf);
ngx_http_file_cache_set_header 2185 http/ngx_http_upstream.c             ngx_http_file_cache_set_header(r, u->buffer.start);