创建条带客户ID(iOS)时出现Alamo菲尔错误

我使用node.js(集成条带)在heroku应用程序中使用alamofire和swift。但是,在创建客户id时,我得到以下错误。我的代码集如下。

如果需要知道其他细节,请告诉我。

错误消息: alamofire.aferror.responseSerializationFailed(alamofire.aferror.responseSerializationFailureReason.inputDataNilorZeroLength)

客户端代码

func createCustomerKey(withAPIVersion apiVersion: String, completion: @escaping STPJSONResponseCompletionBlock) {

    let customerIDURL = self.baseURL.appendingPathComponent("customer")
    let customerIDParameters = ["email":(Auth.auth().currentUser?.email)!]

    Alamofire.request(customerIDURL, method: .post, parameters: customerIDParameters, encoding: JSONEncoding.default).validate(statusCode: 200..<300).responseJSON { responseJSON in

        switch responseJSON.result {
            case .success(let json):
                completion(json as? [String:AnyObject], nil)
                print("\(json)\n\n\n\n")
            case .failure(let error):
                completion(nil, error)
                print("Error message:\(responseJSON.result.error)")
                break
        }
    }

服务器端代码

const express = require('express')
const path = require('path')
const PORT = process.env.PORT || 5000

var app = express();
var stripe = require('stripe')('secret_key')
var bodyParser = require('body-parser')

app.set('port', (process.env.PORT || 5000));

app.use(bodyParser.json());

app.use(bodyParser.urlencoded({
  extended: true
}));

app.use(express.static(path.join(__dirname, 'public')));

app.set('views', path.join(__dirname, 'views'));

app.set('view engine', 'ejs');

app.listen(PORT, () => console.log(`Listening on ${ PORT }`));

app.post('/customer', (req, res) => {

  var email = req.body.email;

  stripe.customers.create({
    email: email
  }, function(err) {
    if (err) {
      console.log(err, req.body)
      res.status(500).end()
    } else {
      res.status(200).send()
    }
  }