ngx.re.match 语法: captures, err = ngx.re.match(subject, regex, options?, ctx?, res_table?) 环境: init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*, ba