如何正确添加标题，贝宝教程

Question

我正在进行贝宝教程服务器端集成。使用PHP。我有个问题。

我想测试资金的失败，最后一部分https://developer.paypal.com/docs/business/checkout/server-side-api-calls/handle-funding-failures/

我想我在正确的位置添加了mock头，但什么也没做，它一直在说Transaction completed。正确的表达方式是什么？Paypal表示：

In the call to Capture payment for order, include the PayPal-Mock-Response header with the mock_application_codes value set to INSTRUMENT_DECLINED. Sample code: -H "PayPal-Mock-Response: {"mock_application_codes" : "INSTRUMENT_DECLINED"}"

<script>
// Render the PayPal button into #paypal-button-container
paypal.Buttons({
// Call your server to set up the transaction
createOrder: function() {
return fetch('examplecreateorder.php', {
method: 'post',
headers: {
'content-type': 'application/json'
}
}).then(function(res) {
return res.json();
}).then(function(data) {

return data.id;
});
},
// Call your server to finalize the transaction
onApprove: function(data) {
return fetch('examplecaptureorder.php', {
method: 'post',
headers: {
'content-type': 'application/json',
'PayPal-Mock-Response': {
'mock_application_codes': 'INSTRUMENT_DECLINED'
}
},
body: JSON.stringify({
orderID: data.orderID
})
}
).then(function(res) {
return res.json().catch(error => console.error('Error:', error));
}).then(function(orderData) {
// Three cases to handle:
//   (1) Recoverable INSTRUMENT_DECLINED -> call actions.restart()
//   (2) Other non-recoverable errors -> Show a failure message
//   (3) Successful transaction -> Show confirmation or thank you
// This example reads a v2/checkout/orders capture response, propagated from the server
// You could use a different API or structure for your 'orderData'
var errorDetail = Array.isArray(orderData.details) && orderData.details[0];
if (errorDetail && errorDetail.issue === 'INSTRUMENT_DECLINED') {
return actions.restart(); // Recoverable state, per:
// https://developer.paypal.com/docs/checkout/integration-features/funding-failure/
}
if (errorDetail) {
var msg = 'Sorry, your transaction could not be processed.';
if (errorDetail.description) msg += 'nn' + errorDetail.description;
if (orderData.debug_id) msg += ' (' + orderData.debug_id + ')';
return alert(msg); // Show a failure message
}
// Show a success message
alert('Transaction completed by  + orderData.payer.name.given_name);

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

Answer 1

在标题中，PayPal-Mock-Response的值应该只是一个字符串，而不是一个对象：

... 
headers: {
'content-type': 'application/json',
'PayPal-Mock-Response': '{"mock_application_codes" : "INSTRUMENT_DECLINED" }'
},
...

请注意OP代码中指定为对象文字的内容之间的差异：

'PayPal-Mock-Response': {
'mock_application_codes': 'INSTRUMENT_DECLINED'
}

以及将PayPal-Mock-Response的值视为字符串的工作代码：

'PayPal-Mock-Response': '{"mock_application_codes" : "INSTRUMENT_DECLINED" }'