Verify an App Store Transaction Receipt 【苹果服务端 验证一个应用程序商店交易收据有效性】

转自：http://blog.csdn.net/saindy5828/article/details/6414014

1、 从Transaction 的TransactionReceipt属性中得到接收的数据，并以base64编码；

2、创建JSON对象，字典格式，单键值对，键名为“receiptdata”，值为上一次编码的数据，效果：

{"receipt-data":"base64编码之后的数据"}

3、发送HTTP POST请求，将数据发送到App Store ，其地址为：https://buy.itunes.apple.com/verifyReceipt

4、App Store的返回值也是一个JSON格式对象，包括两个键值对：

{
"status" : 0,
"receipt" : { … }
}
说明：

如果status的值为0，就说明该receipt为有效的，否则就是无效的。

 

public int verifyReceipt( byte[] receipt) {
       int status = -1;

        //This is the URL of the REST webservice in iTunes App Store
        URL url = new URL("https://buy.itunes.apple.com/verifyReceipt");

        //make connection, use post mode
        HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
        connection.setRequestMethod("POST");
        connection.setDoOutput(true);
        connection.setAllowUserInteraction(false);

        //Encode the binary receipt data into Base 64
        //Here I'm using org.apache.commons.codec.binary.Base64 as an encoder, since commons-codec is already in Grails classpath
        Base64 encoder = new Base64();
        String encodedReceipt = new String(encoder.encode(receipt));

        //Create a JSON query object
        //Here I'm using Grails' org.codehaus.groovy.grails.web.json.JSONObject
        Map map = new HashMap();
        map.put("receipt-data", encodedReceipt);
        JSONObject jsonObject = new JSONObject(map);

        //Write the JSON query object to the connection output stream
        PrintStream ps = new PrintStream(connection.getOutputStream());
        ps.print(jsonObject.toString());
        ps.close();

        //Call the service
        BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        //Extract response
        String str;
        StringBuffer sb = new StringBuffer();
        while ((str = br.readLine()) != null) {
            sb.append(str);
            sb.append("/n");
        }
        br.close();
        String response = sb.toString();

        //Deserialize response
        JSONObject result = new JSONObject(response);
       status = result.getInt("status");
        if (status == 0) {
            //provide content
        } else {
            //signal error, throw an exception, do your stuff honey!
        }

        return status ;


    }

验证的方式也可以采用HTTP协议：HttpClient，下载httpcomponents-client，然后导入lib里的几个jar包。

这也是一种方式，不再进行多余的说明了。所谓条条道路通“苹果”。