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

Question

我正在尝试在 node.js 上设置一个相对简单的 Braintree 服务器运行，我的客户端是用 Swift 2.1 为 iOS 9 编写的，而我'我能够记录客户端令牌，但出现以下错误：

[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.

下面是我的服务器代码（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()
    }
...

这看起来应该非常简单，但我无法理解为什么会出现此错误。

编辑：我正在为 iOS 使用最新版本的 Braintree SDK 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，请随时联系我们的 support 团队。}

您似乎正在序列化来自 gateway.clientToken.generate 的整个响应并将其传递给 BTAPIClient。您应该从响应对象中删除 clientToken 并且仅将 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，我在 iOS 应用程序中仍然遇到错误：

ERROR BTClient could not initialize because the provided clientToken was invalid

我现在使用的是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： 你可以在我的 NOTE 评论中看到问题是我的服务器返回带引号的令牌（我还没有弄清楚为什么）所以我不得不从令牌中 "strip them" 。现在一切正常。

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

Braintree node.js w/ iOS 9 Swift 2.1 - client token error

paypal

braintree

node.js

ios

swift