SCADATrainSys/develop/lua/course_query.lua

-- =========================================
-- json查询接口
-- =========================================

local cjson = require "cjson.safe"

ngx.header.content_type = "application/json; charset=utf-8"

-- 获取请求路径
local uri = ngx.var.uri
local prefix = "/api/json/"
local relative_path = uri:sub(#prefix + 1)

-- 默认 all.json
if relative_path == "" then
    relative_path = "all.json"
elseif not relative_path:match("%.json$") then
    relative_path = relative_path .. ".json"
end

local filepath = "/opt/server_json/" .. relative_path

-- 打开文件
local file, err = io.open(filepath, "r")
if not file then
    ngx.status = 404
    ngx.say(cjson.encode({ code = 404, msg = "未找到字典文件: " .. relative_path }))
    return
end

-- 读取文件内容
local content = file:read("*a")
file:close()

-- 校验 JSON 格式
local json_data = cjson.decode(content)
if not json_data then
    ngx.status = 500
    ngx.say(cjson.encode({ code = 500, msg = "JSON 格式错误: " .. relative_path }))
    return
end

-- 组装响应
local result = cjson.encode({code = 200, msg = "success", data = json_data})

ngx.say(result)