如何在lua中解析json? [英] How to parse json in lua?

问题描述

是否有用于lua解析json内容的轻量级(最好是纯lua)库?基本上，我想通过lua模块扩展我的ngnix，该模块需要验证我从Redis获取的json对象的一些信息.

Is there any lightweight, preferably pure lua, library for lua to parse json content? Basically I wanna augment my ngnix with a lua module that needs to verfiy some information from a json object I'm getting from Redis.

该对象如下所示:

{
  "data": {
    "user": {
      "username": "username",
      "type": "TYPE"
    }
  },
  "passport": {
    "user": "uuid"
  },
}

在我的lua代码中，我需要验证data.user.username是否存在.然后，我可以让Nginx继续其重定向.有人可以告诉我如何实现该目标的例子吗?

In my lua code, I need to verify if the data.user.username exists. Then I can let the nginx continue with its redirection. Can anybody please show me an example of how can I achieve that?

推荐答案

这种形式的JSON数据非常接近Lua表.因此，如果您信任JSON数据，则可以将JSON数据转换为Lua代码并运行它.

JSON data in that form is very close to Lua tables. So you can transform the JSON data into Lua code and run it, if you trust the JSON data.

J=[[
{
  "data": {
    "user": {
      "username": "username",
      "type": "TYPE"
    }
  },
  "passport": {
    "user": "uuid"
  },
}
]]
L="return "..J:gsub('("[^"]-"):','[%1]=')
T=loadstring(L)()
print(T.data.user.username)

如果对JSON数据有任何疑问，您可能希望在沙箱中的L中运行字符串.

If have any qualms about the JSON data, you may want to run the string in L in a sandbox.

这篇关于如何在lua中解析json?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！