param1 = arg[1]
param2 = arg[2]
print("json_file_name:"..param1..", remove key:"..param2)

local cjson = require("cjson")

local file = io.open(param1, "r")
local content = file:read("*all")
file:close()

local data = cjson.decode(content)

local function removeB(obj)
    if type(obj) == "table" then
        for k, v in pairs(obj) do
            if k == param2 then
                obj[k] = nil
            else
                removeB(v)
            end
        end
    end
end
removeB(data)

local newContent = cjson.encode(data)
file = io.open(param1, "w")
file:write(newContent)
file:close()