需要从支付密钥 PayPal 获得交易 ID

Question

我已使用 PayPal MPL 库成功地将 PayPal 集成到我的 iOS 应用程序中。 但问题是如何从我从 PayPal 的回调方法中获取的 paykey 获取交易 ID。

我尝试过这种方式，但收到无效请求的错误。

- (void)paymentSuccessWithKey:(NSString *)payKey andStatus:(PayPalPaymentStatus)paymentStatus
{

 NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"https://svcs.paypal.com/AdaptivePayments/PaymentDetails"]];

//NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"https://svcs.sandbox.paypal.com/AdaptivePayments/PaymentDetails"]];

    NSMutableURLRequest *theRequest=[NSMutableURLRequest requestWithURL:url];

    NSString *parameterString = [NSString stringWithFormat:@"payKey=%@&requestEnvelope.errorLanguage=%@",payKey,@"en_US"];

    NSString *msgLength = [NSString stringWithFormat:@"%d", [parameterString length]];

    [theRequest addValue: msgLength forHTTPHeaderField:@"Content-Length"];

    //do post request for parameter passing
    [theRequest setHTTPMethod:@"POST"];

    [theRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];

    //passing key as a http header request
    [theRequest addValue:api_username forHTTPHeaderField:@"X-PAYPAL-SECURITY-USERID"];

    //passing key as a http header request
    [theRequest addValue:api_password forHTTPHeaderField:@"X-PAYPAL-SECURITY-PASSWORD"];

    [theRequest addValue:api_signature forHTTPHeaderField:@"X-PAYPAL-SECURITY-SIGNATURE"];

    [theRequest addValue:@"JSON" forHTTPHeaderField:@"X-PAYPAL-REQUEST-DATA-FORMAT"];

    [theRequest addValue:@"JSON" forHTTPHeaderField:@"X-PAYPAL-RESPONSE-DATA-FORMAT"];

    [theRequest addValue:app_id forHTTPHeaderField:@"X-PAYPAL-APPLICATION-ID"];

    [theRequest setHTTPBody: [parameterString dataUsingEncoding:NSUTF8StringEncoding]];

    NSURLResponse *response;
    NSError *err;
    NSData *responseData = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&response error:&err];

    NSString* s = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
    NSDictionary *result = [s JSONValue] ;

}

我需要将事务 ID 保存在我的应用程序后端以供将来参考。 需要知道如何尽快得到它。 任何帮助将不胜感激。

感谢和问候 潘卡伊

Answer 1

我不了解iOS，但对于andorid，我们在类似的类中实现了PayPalResultDelegate、Serializable 接口。我正在分享我的代码：

class ResultDelegate implements PayPalResultDelegate, Serializable 
{
    private static final long serialVersionUID = 10001L;

    PaypalDetailImplementation ob = new PaypalDetailImplementation() ;

    public void onPaymentSucceeded(String payKey, String paymentStatus) 
    {
        ob.resultTitle = "SUCCESS";
        ob.resultInfo = "You have successfully completed your transaction.";
        ob.resultExtra = "Key: " + payKey;

        this.displayInformation("onPaymentSucceeded", ob.resultTitle, ob.resultInfo, ob.resultExtra) ;
    }

    public void onPaymentFailed(String paymentStatus, String correlationID,String payKey, String errorID, String errorMessage) 
    {
        ob.resultTitle = "FAILURE";
        ob.resultInfo = errorMessage;
        ob.resultExtra = "Error ID: " + errorID + "\nCorrelation ID: "+ correlationID + "\nPay Key: " + payKey;

        this.displayInformation("onPaymentFailed", ob.resultTitle, ob.resultInfo, ob.resultExtra) ;
    }

    public void onPaymentCanceled(String paymentStatus) 
    {
        ob.resultTitle = "CANCELED";
        ob.resultInfo = "The transaction has been cancelled.";
        ob.resultExtra = "";

        this.displayInformation("onPaymentCanceled", ob.resultTitle, ob.resultInfo, ob.resultExtra) ;
    }

    public void displayInformation ( String msg , String resultTitle , String resultInfo , String resultExtra )
    {
        Log.i("Result as message : ",msg);
        Log.i(resultTitle,"tushar:onPaymentSucceeded");
        Log.i(resultInfo,"tushar:onPaymentSucceeded");
        Log.i(resultExtra,"tushar:onPaymentSucceeded");

    }

Answer 2

首先，确保您发布的应用不带有 API 密码和签名，这一点至关重要。否则，恶意用户可能会反汇编您的应用程序、恢复凭据并对您的帐户执行任意操作。 Read more about verifying a payment.

但是，假设您在服务器上实现了类似的代码，它应该工作。您得到的确切错误是什么？

Answer 3

我自己解决了这个问题。

我正在制作 JSON 类型的 X-PAYPAL-REQUEST-DATA-FORMAT，但是当我将其更改为 NV 时，我开始调整交易 ID。

感谢大家的回答。