lua序列化为json

local cjson = require "cjson"

local json = cjson.encode({

foo = "bar",

some_object = {},

some_array = cjson.empty_array

})

ngx.say(json)

local function serialize(arr)

setmetatable(arr, cjson.empty_array_mt)

return cjson.encode({some_array = arr})

end

local x=serialize({{hello="ok"},2,4})

ngx.say(x)