json - PayPal 智能按钮向我返回 JSON 错误

Question

我正在 PHP 中实现快速结账集成(使用 PayPal 智能按钮)，但在尝试付款时出现错误。

调用createOrder函数时会触发该错误。我相信错误在于服务器端，因为 fetch 已成功执行并且服务器生成了一个订单 ID，但是它没有正确地将订单 ID 传递给客户端，我最终得到了以下错误:

Error: Unexpected token S in JSON at position 0

我不知道会出现什么问题，因为我使用的是 PayPal 提供的 SDK

我的客户

 <script>
        // Render the PayPal button into #paypal-button-container
        paypal.Buttons({

            // Set up the transaction
            createOrder: function(data, actions) {
                return fetch('*http://localhost/test/createorder.php', {
                    method: 'post'
                }).then(function(res) {
                    return res.json();
                }).then(function(data) {
                    return data.orderID;
                });
            },

            // Finalize the transaction
            onApprove: function(data, actions) {
                return fetch('https://api.sandbox.paypal.com/v2/checkout/orders/' + data.orderID + '/capture/', {
                    method: 'post'
                }).then(function(res) {
                    return res.json();
                }).then(function(details) {
                    // Show a success message to the buyer
                    alert('Transaction completed by ' + details.payer.name.given_name + '!');
                });
            },
            onError: function(err){
                    alert(err)
            }


        }).render('#paypal-button-container');
    </script>

我的服务器

<?php

namespace Sample\CaptureIntentExamples;

require __DIR__ . '/vendor/autoload.php';
//1. Import the PayPal SDK client that was created in `Set up Server-Side SDK`.
use Sample\PayPalClient;
use PayPalCheckoutSdk\Orders\OrdersCreateRequest;

class CreateOrder
{

// 2. Set up your server to receive a call from the client
  /**
   *This is the sample function to create an order. It uses the
   *JSON body returned by buildRequestBody() to create an order.
   */
  public static function createOrder($debug=false)
  {
    $request = new OrdersCreateRequest();
    $request->prefer('return=representation');
    $request->body = self::buildRequestBody();
   // 3. Call PayPal to set up a transaction
    $client = PayPalClient::client();
    $response = $client->execute($request);
    if ($debug)
    {
      print "Status Code: {$response->statusCode}\n";
      print "Status: {$response->result->status}\n";
      print "Order ID: {$response->result->id}\n";
      print "Intent: {$response->result->intent}\n";
      print "Links:\n";
      foreach($response->result->links as $link)
      {
        print "\t{$link->rel}: {$link->href}\tCall Type: {$link->method}\n";
      }

      // To print the whole response body, uncomment the following line
      // echo json_encode($response->result, JSON_PRETTY_PRINT);
    }

    // 4. Return a successful response to the client.
    return $response;
  }

  /**
     * Setting up the JSON request body for creating the order with minimum request body. The intent in the
     * request body should be "AUTHORIZE" for authorize intent flow.
     *
     */
    private static function buildRequestBody()
    {
        return array(
            'intent' => 'CAPTURE',
            'application_context' =>
                array(
                    'return_url' => 'https://example.com/return',
                    'cancel_url' => 'https://example.com/cancel'
                ),
            'purchase_units' =>
                array(
                    0 =>
                        array(
                            'amount' =>
                                array(
                                    'currency_code' => 'USD',
                                    'value' => '220.00'
                                )
                        )
                )
        );
    }
}


/**
 *This is the driver function that invokes the createOrder function to create
 *a sample order.
 */
if (!count(debug_backtrace()))
{
  CreateOrder::createOrder(true);
}
?>

我从 PayPal 文档中获取了代码。

更新

当我将 return $response 替换为如下内容时:

 $orderID=['orderID'=>$response->result->id];
 echo json_encode($orderID, true);

并删除这部分代码:

  if ($debug)
        {
          print "Status Code: {$response->statusCode}\n";
          print "Status: {$response->result->status}\n";
          print "Order ID: {$response->result->id}\n";
          print "Intent: {$response->result->intent}\n";
          print "Links:\n";
          foreach($response->result->links as $link)
          {
            print "\t{$link->rel}: {$link->href}\tCall Type: {$link->method}\n";
          }

          // To print the whole response body, uncomment the following line
          // echo json_encode($response->result, JSON_PRETTY_PRINT);
        }

它部分有效。 PayPal 灯箱会打开并显示生成的 token ，但随后就会关闭。当我尝试使用 URL 直接访问它时，它显示“出现问题”。

Answer 1

我终于找到了解决方案，在后端和前端做了一些修改。

我通过以下方式让这个工作

注释这部分代码

  if ($debug=true)
    {
      print "Status Code: {$response->statusCode}\n";
      print "Status: {$response->result->status}\n";
      print "Order ID: {$response->result->id}\n";
      print "Intent: {$response->result->intent}\n";
      print "Links:\n";
      foreach($response->result->links as $link)
      {
        print "\t{$link->rel}: {$link->href}\tCall Type: {$link->method}\n";
      }

      // To print the whole response body, uncomment the following line
      // echo json_encode($response->result, JSON_PRETTY_PRINT);
    }

将 return $response 替换为

$json_obj= array('id'=>$response->result->id);
$jsonstring = json_encode($json_obj);
echo $jsonstring;

并在前端调整货币

错误的货币选项引发异常，导致 PayPal 灯箱关闭(以及信用卡选项)。