Lua POST请求包含垃圾

local http = require("socket.http")
local ltn12 = require("ltn12")

-- POST请求的URL和数据
local url = "http://example.com/api"
local postData = "data=garbage"

-- 构建请求体
local requestBody = {
    url = url,
    method = "POST",
    headers = {
        ["Content-Type"] = "application/x-www-form-urlencoded",
        ["Content-Length"] = #postData
    },
    source = ltn12.source.string(postData)
}

-- 发送请求
local response = {}
local result, statusCode, headers, statusText = http.request(requestBody, response)

-- 检查请求是否成功
if statusCode == 200 then
    print("请求成功")
    print("响应内容: " .. table.concat(response))
else
    print("请求失败")
    print("错误代码: " .. statusCode)
    print("错误信息: " .. statusText)
end