之前没有做过IOS 内购服务器验证这块，所以找了不少参考资料，网上大多php和java版本，然后自己搞了一个C#版本，希望能给大家一些参考，下面步入正题

在客户端向苹果购买成功之后，我们需要进行二次验证。

IOS在沙箱环境下购买成功之后，向苹果进行二次验证，确认用户是否购买成功。

当应用向Apple服务器请求购买，成功之后，Apple会返回以下四个数据给应用

public bool ValidateApplePay()
{

//客户端post过来的参数
string appleReceipt = Request.Form["appleReceipt"]; //苹果内购的验证收据
string orderId = PayHelper.GetOrderIDByPrefix("AP"); //订单编号
string amount = Request.Form["amount"]; //金额
string userId = Request.Form["userId"]; //用户UserID

// 验证参数
if (appleReceipt.Length < 20)
{
return false;
}

string strJosn = string.Format("{{\"receipt-data\":\"{0}\"}}", appleReceipt);
// 请求验证
string strResult = CreatePostHttpResponse(strJosn, isSandbox);
JObject obj = JObject.Parse(strResult);//using Newtonsoft.Json.Linq;

// 判断是否购买成功
if (obj["status"].ToString() == "0")
{
return true;
}
else
{
return false;
}
}
public string CreatePostHttpResponse(string datas, bool isSandbox = false)
{
//正式购买地址 沙盒购买地址
string url_buy = "https://buy.itunes.apple.com/verifyReceipt";
string url_sandbox = "https://sandbox.itunes.apple.com/verifyReceipt";
string url = isSandbox ? url_sandbox : url_buy;

HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.ProtocolVersion = HttpVersion.Version10;
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
byte[] data = Encoding.GetEncoding("UTF-8").GetBytes(datas.ToString());
using (Stream stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}

HttpWebResponse response = request.GetResponse() as HttpWebResponse;
Stream responseStream = response.GetResponseStream(); //获取响应的字符串流
StreamReader sr = new StreamReader(responseStream); //创建一个stream读取流
var str = sr.ReadToEnd();
sr.Close();
responseStream.Close();
return str.ToString();
}