[英]Is there a way to set up recurring payments with the PayPal REST API?
我讀了這個問題和這個 問題 。 他們倆都說（一年前）正在通過REST API進行定期付款。 在我客戶的網站上，客戶需要能夠付款
當客戶付款時，通知其網站至關重要。 我目前已為選項1進行了設置：
app.get("/cart/checkout/paypal", isLoggedIn, isVerified, function (req, res) {
var user = req.user;
var paymentDetails = {
"intent": "sale",
"payer": { "payment_method": "paypal"},
"redirect_urls": {
"return_url": "http://localhost:5000/cart/checkout/success",
"cancel_url": "http://localhost:5000/cart"
},
"transactions": [
{ "amount": { "total": user.cart.finalPrice.toFixed(2), "currency": "USD"},
"description": "You are being billed for " + user.cart.finalPrice.toFixed(2)}
]
};
paypal.payment.create(paymentDetails, function (err, payment) {
if (err) console.log(err);
else {
if (payment.payer.payment_method === "paypal") {
req.session.paymentId = payment.id;
var redirectURL;
for (var i = 0; i < payment.links.length; i++) {
var link = payment.links[i];
if (link.method === "REDIRECT") redirectURL = link.href;
}
res.redirect(redirectURL);
}
}
})
})
然后， "return_url" （ /cart/checkout/success ）獲取所有正確的會話信息，然后我的數據庫對其進行處理。
app.get("/cart/checkout/success", isLoggedIn, isVerified, function (req, res) {
var user = req.user,
paymentId = req.session.paymentId,
payerId = req.param("PayerID"),
details = { "payer_id": payerId };
...
選項2（重復付款）是否有類似的設置。 如果沒有，是否有辦法讓PayPal每次用戶用未償還的余額和已付金額等支付分期付款時通知我的服務器？
是的，現在有一種在新的REST API中進行訂閱的方法。 請參閱文檔 。
好的，首先您需要設置客戶ID和從PayPal獲得的密碼。 我既有測試環境又有現場環境
所有{xxx}是我的私人應用程序變量
public function __construct()
{
$this->sandbox = {sandbox};
if($this->sandbox)
{
$this->host = 'https://api.sandbox.paypal.com';
$this->clientId = {clientIdSandbox};
$this->clientSecret = {clientSecretSandbox};
}
else
{
$this->host = 'https://api.paypal.com';
$this->clientId = {clientId};
$this->clientSecret = {clientSecret};
}
$this->get_access_token();
}
然后我去獲取訪問令牌
private function get_access_token()
{
$curl = curl_init($this->host.'/v1/oauth2/token');
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_USERPWD, $this->clientId . ":" . $this->clientSecret);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, 'grant_type=client_credentials');
$response = curl_exec( $curl );
if (empty($response))
{
echo "NO RESPONSE for $url for function ".__FUNCTION__;
print_r(curl_getinfo($curl));
die(curl_error($curl));
curl_close($curl); // close cURL handler
}
else
{
$info = curl_getinfo($curl);
curl_close($curl); // close cURL handler
if($info['http_code'] != 200 && $info['http_code'] != 201 )
{
echo "Received error: " . $info['http_code']. "\n";
echo "Raw response:".$response."\n";
die();
}
}
$jsonResponse = json_decode( $response );
$this->token = $jsonResponse->access_token;
$this->expires = time()+$jsonResponse->expires_in;
}
然后將訪問數據存儲在classes屬性中
然后，您需要再三個部分。 創建訂閱模板，然后檢索協議，然后為客戶端創建協議。
在這種方法中，我發送數據名稱，描述，期間，間隔和價格。 但是，您可以手動填寫。 這將創建您現在可以出售的訂閱。
public function create_subscription($name, $desc, $period, $interval, $price)
{
$data = array(
'name' => $name,
'description' => $desc,
'type' => 'INFINITE',
'payment_definitions' => array(
0 => array (
'name' => 'Payment Definition-1',
'type' => 'REGULAR',
'frequency' => $period,
'frequency_interval' => $interval,
'amount' => array(
'value' => $price,
'currency' => 'EUR',
),
'cycles' => '0',
),
),
'merchant_preferences' => array(
'return_url'=>{return_url},
'cancel_url'=>{cancel_url},
'auto_bill_amount' => 'YES',
'initial_fail_amount_action' => 'CONTINUE',
'max_fail_attempts' => '0',
),
);
$data=json_encode($data);
$url = $this->host.'/v1/payments/billing-plans';
return $this->make_post_call($url, $data);
}
從上述方法中，您將獲得一個ID，將其用於下面的方法以收集訂閱數據並將其存儲
public function retrieve_agreement($id)
{
$url = $this->host.'/v1/payments/billing-agreements/'.$id;
return $this->make_get_call($url);
}
這種方法將允許您分配和同意給客戶。 您將需要協議的ID和一些數據，以便您可以將其添加到說明中。
public function create_agreement($subId, $data, $product)
{
$paypalId = ($this->sandbox) ? $product->paypal_test_sub_id : $product->paypal_sub_id;
$startDate = date('c', strtotime('+10 MINUTE'));
$data = array (
'name'=>'Subscription for subscription::'.$subId,
'description'=>{company}.' Subscription - ' . $data . ' - '.$product->name.' - '.$product->price .'€',
'start_date'=>$startDate,
'plan'=>array(
'id'=>$paypalId,
),
'payer'=>array(
'payment_method'=>'paypal',
),
'override_merchant_preferences'=>array(
'return_url'=>{return_url}.$subId.'/',
'cancel_url'=>{cancel_url}.$subId.'/',
),
);
$data=json_encode($data);
$url = $this->host.'/v1/payments/billing-agreements';
$response = $this->make_post_call($url, $data);
header("location:".$response['links'][0]['href']);
//return $response;
}
return_url是最終用戶將被發送以完成協議的URL。 我比用它傳遞給下面的方法
public function execute_agreement($token)
{
$data=json_encode('');
$url = $this->host.'/v1/payments/billing-agreements/'.$token.'/agreement-execute';
return $response = $this->make_post_call($url, $data);
}
然后，您將需要創建一個計划任務以使用retrieve_agreement方法，並查看預訂是否已取消。
這是一個簡短的解釋。
如果您需要更多，請告訴我。
獲取並發布
private function make_post_call($url, $postdata)
{
$curl = curl_init($url);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER, array(
'Authorization: Bearer '.$this->token,
'Accept: application/json',
'Content-Type: application/json'
));
curl_setopt($curl, CURLOPT_POSTFIELDS, $postdata);
$response = curl_exec( $curl );
if (empty($response))
{
echo "NO RESPONSE for $url for function ".__FUNCTION__;
print_r(curl_getinfo($curl));
die(curl_error($curl));
curl_close($curl); // close cURL handler
}
else
{
$info = curl_getinfo($curl);
curl_close($curl); // close cURL handler
if($info['http_code'] != 200 && $info['http_code'] != 201 )
{
echo "Received error: " . $info['http_code']. "\n";
echo "Raw response:".$response."\n";
die();
}
}
$jsonResponse = json_decode($response, TRUE);
return $jsonResponse;
}
private function make_get_call($url)
{
$curl = curl_init($url);
curl_setopt($curl, CURLOPT_POST, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER, array(
'Authorization: Bearer '.$this->token,
'Accept: application/json',
'Content-Type: application/json'
));
$response = curl_exec( $curl );
if (empty($response))
{
echo "NO RESPONSE for $url for function ".__FUNCTION__;
print_r(curl_getinfo($curl));
die(curl_error($curl));
curl_close($curl); // close cURL handler
}
else
{
$info = curl_getinfo($curl);
//echo "Time took: " . $info['total_time']*1000 . "ms\n";
curl_close($curl); // close cURL handler
if($info['http_code'] != 200 && $info['http_code'] != 201 )
{
echo "Received error: " . $info['http_code']. "\n";
echo "Raw response:".$response."\n";
die();
}
}
$jsonResponse = json_decode($response, TRUE);
return $jsonResponse;
}
我建議暫時不要使用REST API。 尚未完成，Classic API為您提供了更多的靈活性。
我將使用帶有定期付款的Express Checkout，然后您將要使用即時付款通知（IPN）來處理付款，取消的個人資料等。
IPN通知實際上會針對您帳戶中發生的任何交易觸發，因此您可以自動處理付款，退款，爭議，訂閱等。您可以更新數據庫，發送電子郵件通知或其他需要自動執行的操作這些交易類型。
IPN是PayPal提供的最有價值的工具之一，但它也是利用率最高的工具之一。
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