<%+header%>
<%
local http = require("luci.http")
local core = require("substore.core")
local util = require("substore.util")
local id = http.formvalue("id") or ""
local idx = tonumber(http.formvalue("idx") or "") or 0
local meta = id ~= "" and core.get(id) or nil
local nodes = id ~= "" and core.read_nodes(id) or {}
local n = nodes[idx]
-- 注入 JS 的节点对象：把全部 "<" 转成 <，同时挡住 "
<% if not n then %>