ngx_http_add_cache_control 51 http/modules/ngx_http_headers_filter_module.c static ngx_int_t ngx_http_add_cache_control(ngx_http_request_t *r, ngx_http_add_cache_control 68 http/modules/ngx_http_headers_filter_module.c { ngx_string("Cache-Control"), 0, ngx_http_add_cache_control },