Can we do the success page redirect from server side?

Question

We are using PayPal Checkout Server-side PHP (Orders v2 REST API with PayPal JavaScript SDK). For a long time, we have been suffering a problem, with almost 2-5 % of our orders not successfully redirecting to the success page. Once the payment is successful (on our custom build e-commerce) the redirect happens from JavaScript:

onApprove: function(data, actions) {
   return fetch(
           '/paypal_checkout/get_order_details',{ method: 'GET'}
                ).then(function(res) {
                    return res.json();
                }).then(function(res) {
                 if (res.data.status == "APPROVED") {
                    // capture order
   return fetch(
   '/paypal_checkout/capture_order',{method:'POST'})
    .then(function(resData) {
          return resData.json();
          }).then(function(resData) {

   let errorDetail = resData.data.hasOwnProperty('details') && Array.isArray(resData.data.details) && resData.data.details[0];
  if (errorDetail && errorDetail.issue === 'INSTRUMENT_DECLINED') {
                                showErrorWithText(errTxt);
                            }
   let captureStatus = resData.data.purchase_units[0].payments.captures[0].status;
   if (resData.ack && captureStatus == 'COMPLETED') {
       window.location.href = 'kasse.html?schritt=3';
   }    
}

Can we do this redirect from the server side?

Answer 1

Approval happens on the client side, so redirection must happen on the client side, but what you can do is move where you do the redirect. Essentially:

onApprove: function(data, actions) {
   window.location.href = 'kasse.html?schritt=3&orderid=' + data.id; 
}

Then, on that page you redirect to, immediately proceed with the capture and show the result.

---

(If you want there to be a review step/action at the redirected page before capturing, there is a user_action = CONTINUE parameter you can set in order creation request, but your question doesn't mention that and so can keep the default PAY_NOW behavior and immediately capture)