Question

我正在尝试设置一个在node.js上运行的相对简单的Braintree服务器，我的客户端用Swift 2.1 for iOS 9编写，虽然我能够记录客户端令牌，但是我收到以下错误：

[BraintreeSDK] ERROR Unsupported client token version. Please ensure your server is generating a valid Braintree ClientToken with a server-side SDK that is compatible with this version of Braintree iOS.

以下是我的服务器代码（改编自BraintreeDev存储库）：

'use strict';

var express = require('express');
var app = express();

var braintree = require('braintree');

var bodyParser = require('body-parser');
var parseUrlEnconded = bodyParser.urlencoded({
  extended: false
});

var gateway = braintree.connect({
  environment: braintree.Environment.Sandbox,
  merchantId: 'xxxxxxxxxxxxx',
  publicKey: 'xxxxxxxxxxxxxxx',
  privateKey: 'xxxxxxxxxxxxxxxxxxxxxxx'
});

app.use(express.static('public'));

app.set('views', __dirname + '/views');
app.set('view engine', 'ejs');

// Creates a new token and returns it in the response.
app.get('/token', function (req, res) {
  gateway.clientToken.generate({}, function (error, response) {
    res.json(response);
  });
});

app.post('/payment', function (req, res) {
  var sale = {
    amount: "10",
    payment_method_nonce: req.param('payment_method_nonce')
  };

  gateway.transaction.sale(sale, function (error, response) {
    if (!error && response.success) {
      res.json(response);
    } else {
      // do something else
    }
  });
});


app.listen(process.env.PORT || 5000)

module.exports = app;

这是我的iOS代码：

class BaseViewController: UIViewController {

    var braintreeClient: BTAPIClient?

    override func viewDidLoad() {
        super.viewDidLoad()

        let clientTokenURL = NSURL(string: "https://my-heroku-app.herokuapp.com/token")!
        let clientTokenRequest = NSMutableURLRequest(URL: clientTokenURL)
        clientTokenRequest.setValue("text/plain", forHTTPHeaderField: "Accept")

        NSURLSession.sharedSession().dataTaskWithRequest(clientTokenRequest) { (data, response, error) -> Void in
            guard let data = data else {
                return
            }

            let clientToken = String(data: data, encoding: NSUTF8StringEncoding)
            print("Client Token: \(clientToken)")
            self.braintreeClient = BTAPIClient(authorization: clientToken!)
            print(response?.description)

        }.resume()
    }
...

这似乎应该是非常直接的，我很难理解为什么我会收到这个错误。

编辑：我使用的是最新版本的Braintree SDK for iOS和最新版本的Braintree node.js包。

Answer 1

_{完全披露：我在Braintree工作。如果您有任何其他问题，请随时与我们的support小组联系。}

您似乎正在序列化gateway.clientToken.generate的整个回复并将其传递给BTAPIClient。您应该从响应对象中删除clientToken，并仅将clientToken字符串值传递给BTAPIClient。

app.get('/token', function (req, res) {
  gateway.clientToken.generate({}, function (error, response) {
    res.json(response.clientToken);
  });
});

有关详细信息，请参阅clientToken.generate文档。

Answer 2

上面的答案解决了我的服务器端代码问题。但是，我仍然在iOS应用程序中收到错误：

ERROR BTClient could not initialize because the provided clientToken was invalid

我现在正在使用Alamofire，我的功能如下：

associatedType ClientTokenResult = (clientToken: String?) -> ()

func fetchToken(completion: ClientTokenResult) {
    let parameters = [String: AnyObject]()
    Alamofire.request(Router.Get("api/token", parameters))
        .validate()
        .response { (request, response, data, error) -> Void in
            guard let data = data else {
                return
            }

            if let error = error {
                print("Error: \(error.localizedDescription)")
                completion(clientToken: nil)
            } else {
                let clientToken = String(data: data, encoding: NSUTF8StringEncoding)!

                // NOTE: This shouldn't be necessary, but as of right now the server is returning the token
                // with quotation marks.
                let strippedClientToken = clientToken.stringByReplacingOccurrencesOfString("\"",
                    withString: "")

                print("Client Token: \(strippedClientToken)")
                print(response?.debugDescription)

                completion(clientToken: strippedClientToken)
            }
    }
}

更新：您可以在我的NOTE评论中看到问题是我的服务器正在使用引号返回令牌（我还没弄清楚为什么）所以我不得不去除它们＃34;来自令牌。现在一切都很好。

Braintree node.js w / iOS 9 Swift 2.1 - 客户端令牌错误

2 个答案: