ngx_http_upstream_cache_last_modified 22 src/http/ngx_http_upstream.c static ngx_int_t ngx_http_upstream_cache_last_modified(ngx_http_request_t *r, ngx_http_upstream_cache_last_modified 389 src/http/ngx_http_upstream.c ngx_http_upstream_cache_last_modified, 0,