PayPal Orders v2:订单的审批the ("checkoutnow?token..")返回302重定向

Question

我正在努力使用Orders v2 PayPal应用编程接口创建订单。

我有令牌，并且我用这些头创建了一个请求来创建订单：

{
  "intent": "CAPTURE",
  "purchase_units": [{
    "description": "Payment",
    "amount": {
      "value": 'X',
      "currency_code": "EUR",
      "breakdown": {
        "item_total": {
          "currency_code": "EUR",
          "value": 'X'
        },
      }
    },
    "items": [{
      "unit_amount": {
        "currency_code": "EUR",
        "value": 'X'
      },
      "quantity": "1",
      "name": 'item name',
    }]
  }],
  "application_context": {
    "brand_name": "My brand name",
    "locale": "it-IT",
    "return_url": 'my-return-url',
  }
}

订单创建完成后，我将获得让用户付款的approveurl。

对于approveurl，我执行以下调用：

try {
  var response = await http.post(approveurl, body: jsonEncode({"payer_id": payerId}), headers: {
      "content-type": "application/json",
      'Authorization': 'Bearer ' + accessToken
  });

  final body = jsonDecode(response.body);
  if (response.statusCode == 200) {
    return body;
  }
  return null;
} catch (e) {
  rethrow;
}

但我得到的回应是：

url = "https://www.sandbox.paypal.com/checkoutnow?token=..."
payerId = "..."
accessToken = "..."
response = {Response}
 request = {Request} POST https://www.sandbox.paypal.com/checkoutnow?token=...
 statusCode = 302
 reasonPhrase = "Found"
 contentLength = 61
 headers = {_InternalLinkedHashMap} size = 9
     0 = {map entry} "paypal-debug-id" -> "95934918777a1"
     1 = {map entry} "cache-control" -> "max-age=0, no-cache, no-store, must-revalidate"
     2 = {map entry} "location" -> "/webapps/hermes?token=..."
     3 = {map entry} "set-cookie" -> "X-PP-SILOVER=name%3DSANDBOX3.WEB.1%26silo_version%3D880%26app%3Dhermesnodeweb%26TIME%3D1595167415%26..."
     4 = {map entry} "date" -> "Sun, 19 Jul 2020 14:03:35 GMT"
     5 = {map entry} "vary" -> "Accept"
     6 = {map entry} "strict-transport-security" -> "max-age=63072000"
     7 = {map entry} "content-length" -> "61"
     8 = {map entry} "content-type" -> "text/plain; charset=utf-8"
 isRedirect = false
 persistentConnection = true

response.body是：

Found. Redirecting to /webapps/hermes?token=...

Answer 1

使用approvalurl的

我执行此调用：

审批URL不是供您调用的。这是一个web URL，而不是API URL。这是由付费客户登录并批准付款。

然而，将它们重定向到它将是一个糟糕的网络体验。对于现代网页设计，你应该提供一个“在上下文中”的批准，让你的网站保持在后台加载。下面是如何做到这一点的：https://developer.paypal.com/demo/checkout/#/pattern/server

通过这种集成，您不需要自己读取approval_url，只需在从createOrder获取时返回订单id。