我正在使用PayPal Express Checkout而且我需要做的是单独授权和捕获付款，我目前的PayPal流程是，
1）我使用以下代码创建付款：
var paypal = require('paypal-rest-sdk');
function createPayPal(req, res, itemsArray, redirectsTos) {
var payment = {
"intent": "sale",
"payer": {},
"transactions": [{
"amount": {
"currency": sails.config.currency,
"total": itemsArray.totalArrayAmount,
"details": {
"subtotal": itemsArray.totalArrayAmount,
"fee": sails.config.PayPalCreateFee
}
},
"invoice_number": req.session.invNum,
"item_list": {
"items": itemsArray.itemsArray
}
}]
};
sails.log.info('payment obj :', JSON.stringify(payment))
payment.payer.payment_method = sails.config.PayPalPaymentMethod;
payment.redirect_urls = {
"return_url": res.locals.return_url_buy,
"cancel_url": res.locals.cancel_url_buy
};
paypal.payment.create(payment, function(error, payment) {
if (error) {
sails.log.error(error);
redirectsTos(({
message: 'failure',
redirect: '/paypal/error'
}), null);
} else {
sails.log.info('Payment ID = ', payment.id);
sails.log.info('User ID = ', req.session.userSession);
var redirectUrl;
for (var i = 0; i < payment.links.length; i++) {
var link = payment.links[i];
if (link.method === 'REDIRECT') {
redirectUrl = link.href;
sails.log.info('goto:', redirectUrl)
redirectsTos(null, ({
message: 'success',
redirect: redirectUrl
}));
}
}
}
});
}
和Paypal返回订单信息和重定向urls，然后我将用户重定向到href对象中的links。然后，当付费流程返回给我的网站时，它会发送给我
{
paymentId: 'PAY-5FB60654T5508144abcxyzZLQ',
token: 'EC-26U68825EW2123428',
PayerID: 'QSABTRW6AHYH6'
}
然后我使用以下代码执行付款。
function executePayPal(req, paymentId, payerId, executedPayPal) {
sails.log.info('in executedPayPal');
var details = {
"payer_id": payerId
};
var payment = paypal.payment.execute(paymentId, details, function(error, payment) {
if (error) {
sails.log.error('error in payment id in executePayPal function of paypal controller', error);
var err = JSON.stringify(error);
var errParsed = JSON.parse(err);
crashHandlingService.appCrash(errParsed, 101202);
executedPayPal(({
message: 'failure',
redirect: '/paypal/error/'
}), null);
} else {
executedPayPal(({
message: 'success',
redirect: '/paypal/success/'
}), null);
}
});
}
现在这段代码基本上是
我真正想要实现的是
捕获付款，以便我可以稍后在某些cronJob或服务中捕获付款。
并在上面的流程中将用户重定向到paypal页面，我真的不知道如何授权，重定向然后捕获付款。
所以请在这方面指导我。
注意：我已阅读以下paypal文档，但无法理解。请注意，我需要在paypal页面上显示付款详情，并在付款页面上显示优惠券代码及其折扣。
https://developer.paypal.com/docs/integration/direct/capture-payment/#authorize-the-payment https://developer.paypal.com/docs/classic/express-checkout/ht_ec-singleAuthPayment-curl-etc/
提前致谢:)。
答案 0 :(得分：12)
最后我找到了解决方案，我认为我应该在这里发布，以便对其他人有所帮助。
所以基本上有4个以下步骤，其中一个必须使用PayPal Node SDK
要创建付款，您可以使用PayPal Node sdk here的payment.create方法。
.Create Method将返回"href"中的网址链接，将用户重定向到PayPal页面，以便将用户重定向到PayPal页面。
从付费PayPal页面返回后，您必须使用从PayPal收到的payer_id和paymentId来运行PayPal Node SDK here的.execute方法。
最后，当您需要通过提供金额和执行授权响应中收到的17位授权ID来捕获您必须使用PayPal Node SDK here的.authorization.capture方法的授权交易金额时。
代码＆amp;如果链接将来不起作用，将在下面提供响应示例。
.create Code
var create_payment_json = {
"intent": "authorize",
"payer": {
"payment_method": "paypal"
},
"redirect_urls": {
"return_url": "http://return.url",
"cancel_url": "http://cancel.url"
},
"transactions": [{
"item_list": {
"items": [{
"name": "item",
"sku": "item",
"price": "1.00",
"currency": "USD",
"quantity": 1
}]
},
"amount": {
"currency": "USD",
"total": "1.00"
},
"description": "This is the payment description."
}]
};
paypal.payment.create(create_payment_json, function (error, payment) {
if (error) {
console.log(error.response);
throw error;
} else {
for (var index = 0; index < payment.links.length; index++) {
//Redirect user to this endpoint for redirect url
if (payment.links[index].rel === 'approval_url') {
console.log(payment.links[index].href);
}
}
console.log(payment);
}
});
Response Sample
{
"id": "PAY-17S8410768582940NKEE66EQ",
"create_time": "2013-01-31T04:12:02Z",
"update_time": "2013-01-31T04:12:04Z",
"state": "approved",
"intent": "authorize",
"payer": {
"payment_method": "credit_card",
"funding_instruments": [
{
"credit_card": {
"type": "visa",
"number": "xxxxxxxxxxxx0331",
"expire_month": "11",
"expire_year": "2018",
"first_name": "Betsy",
"last_name": "Buyer",
"billing_address": {
"line1": "111 First Street",
"city": "Saratoga",
"state": "CA",
"postal_code": "95070",
"country_code": "US"
}
}
}
]
},
"transactions": [
{
"amount": {
"total": "7.47",
"currency": "USD",
"details": {
"tax": "0.03",
"shipping": "0.03"
}
},
"description": "This is the payment transaction description.",
"related_resources": [
{
"sale": {
"id": "4RR959492F879224U",
"create_time": "2013-01-31T04:12:02Z",
"update_time": "2013-01-31T04:12:04Z",
"state": "completed",
"amount": {
"total": "7.47",
"currency": "USD"
},
"parent_payment": "PAY-17S8410768582940NKEE66EQ",
"links": [
{
"href": "https://api.sandbox.paypal.com/v1/payments/sale/4RR959492F879224U",
"rel": "self",
"method": "GET"
},
{
"href": "https://api.sandbox.paypal.com/v1/payments/sale/4RR959492F879224U/refund",
"rel": "refund",
"method": "POST"
},
{
"href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-17S8410768582940NKEE66EQ",
"rel": "parent_payment",
"method": "GET"
}
]
}
}
]
}
],
"links": [
{
"href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-17S8410768582940NKEE66EQ",
"rel": "self",
"method": "GET"
}
]
}
.execute Code
var paymentId = 'PAYMENT id created in previous step';
paypal.payment.execute(paymentId, execute_payment_json, function (error, payment) {
if (error) {
console.log(error.response);
throw error;
} else {
console.log("Get Payment Response");
console.log(JSON.stringify(payment));
}
});
Response Sample
{
"id": "PAY-34629814WL663112AKEE3AWQ",
"create_time": "2013-01-30T23:44:26Z",
"update_time": "2013-01-30T23:44:28Z",
"state": "approved",
"intent": "aurthorize",
"payer": {
"payment_method": "paypal",
"payer_info": {
"email": "bbuyer@example.com",
"first_name": "Betsy",
"last_name": "Buyer",
"payer_id": "CR87QHB7JTRSC"
}
},
"transactions": [
{
"amount": {
"total": "7.47",
"currency": "USD",
"details": {
"tax": "0.04",
"shipping": "0.06"
}
},
"description": "This is the payment transaction description.",
"related_resources": [
{
"sale": {
"id": "1KE4800207592173L",
"create_time": "2013-01-30T23:44:26Z",
"update_time": "2013-01-30T23:44:28Z",
"state": "completed",
"amount": {
"currency": "USD",
"total": "7.47"
},
"transaction_fee": {
"value": "0.50",
"currency": "USD"
},
"parent_payment": "PAY-34629814WL663112AKEE3AWQ",
"links": [
{
"href": "https://api.sandbox.paypal.com/v1/payments/sale/1KE4800207592173L",
"rel": "self",
"method": "GET"
},
{
"href": "https://api.sandbox.paypal.com/v1/payments/sale/1KE4800207592173L/refund",
"rel": "refund",
"method": "POST"
},
{
"href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-34629814WL663112AKEE3AWQ",
"rel": "parent_payment",
"method": "GET"
}
]
}
}
]
}
],
"links": [
{
"href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-34629814WL663112AKEE3AWQ",
"rel": "self",
"method": "GET"
}
]
}
.authorization.capture Code
var capture_details = {
"amount": {
"currency": "USD",
"total": "4.54"
},
"is_final_capture": true
};
paypal.authorization.capture("5RA45624N3531924N", capture_details, function (error, capture) {
if (error) {
console.error(error);
} else {
console.log(capture);
}
});
Response Sample
{
"id": "6BA17599X0950293U",
"create_time": "2013-05-06T22:32:24Z",
"update_time": "2013-05-06T22:32:25Z",
"amount": {
"total": "4.54",
"currency": "USD"
},
"is_final_capture": true,
"state": "completed",
"parent_payment": "PAY-44664305570317015KGEC5DI",
"links": [
{
"href": "https://api.sandbox.paypal.com/v1/payments/capture/6BA17599X0950293U",
"rel": "self",
"method": "GET"
},
{
"href": "https://api.sandbox.paypal.com/v1/payments/capture/6BA17599X0950293U/refund",
"rel": "refund",
"method": "POST"
},
{
"href": "https://api.sandbox.paypal.com/v1/payments/authorization/5RA45624N3531924N",
"rel": "authorization",
"method": "GET"
},
{
"href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-44664305570317015KGEC5DI",
"rel": "parent_payment",
"method": "GET"
}
]
}
您可以从REST API Reference和PayPal-node-SDK获取更多信息。
请原谅我，如果回复样本有点变化，因为我已经从PayPal网站上复制了它。
感谢。