我正在使用braintree处理我正在创建的网站的付款。 api要求我通过javascript生成付款方式nonce以处理付款。我能够在表单提交时生成nonce并将其放在输入字段中，但是，该值未被发布。
jquery：
$( document ).ready(function() {
$('#checkout').on("submit", function() {
var client = new braintree.api.Client({clientToken: "<?php echo $clientToken ?>"});
client.tokenizeCard({
number: $('#number').val(),
cardholderName: $('#first_name').val() + ' ' + $('#last_name').val(),
expirationMonth: $('#expiration_month').val(),
expirationYear: $('#expiration_year').val(),
cvv: $('#cvv').val(),
}, function (err, nonce) {
$("#checkout input[name=nonce]").val(nonce);
$('#checkout input[name=random]').val('randomtext');
});
});
});
php：
<?php
echo $_POST['first_name'];
echo '<br/>';
echo $_POST['last_name'];
echo '<br/>';
echo $_POST['phone_number'];
echo '<br/>';
echo $_POST['expiration_month'];
echo '<br/>';
echo $_POST['expiration_year'];
echo '<br/>';
echo $_POST['nonce'];
echo '<br/>';
echo $_POST['random'];
echo '<br/>';
$result = Braintree_Transaction::sale(array(
'amount' => '113.00',
'paymentMethodNonce' => $_POST['nonce'],
'orderId' => 'order id',
'customer' => array(
'firstName' => $_POST['first_name'],
'lastName' => $_POST['last_name'],
'phone' => $_POST['phone_number'],
)
));
if ($result->success) {
print_r("success!: " . $result->transaction->id);
} else if ($result->transaction) {
print_r("Error processing transaction:");
print_r("\n code: " . $result->transaction->processorResponseCode);
print_r("\n text: " . $result->transaction->processorResponseText);
} else {
print_r("Validation errors: \n");
print_r($result->errors->deepAll());
}
?>
html：
<form id="checkout" name="checkout" action="checkout_result.php" method="post" style="width:20em;font-size:1.5em;margin-left:auto;margin-right:auto;">
<table style="margin-top:0.5em;">
<tr>
<td style="padding-left:0.75em;">First Name:</td>
<td><input style="font-size:0.75em;"data-braintree-name="first_name" name="first_name" id="first_name" value=""/></td>
</tr>
<tr>
<td style="padding-left:0.75em;">Last Name:</td>
<td><input style="font-size:0.75em;"data-braintree-name="last_name" name="last_name" id="last_name" value=""/></td>
</tr>
<tr>
<td style="padding-left:0.75em;">Email Address:</td>
<td><input style="font-size:0.75em;" name="email_address" id="email_address" value=""/></td>
</tr>
<tr>
<td style="padding-left:0.75em;">Phone Number:</td>
<td><input style="font-size:0.75em;" name="phone_number" id="phone_number" value=""/></td>
</tr>
<tr>
<td style="padding-left:0.75em;">Street Address:</td>
<td><input style="font-size:0.75em;" data-braintree-name="street_address" name="street_address" id="street_address" value=""/></td>
</tr>
<tr>
<td style="padding-left:0.75em;">Apt #:</td>
<td><input style="font-size:0.75em;" data-braintree-name="extended_address" name="extended_address" id="extended_address" value=""/></td>
</tr>
<tr>
<td style="padding-left:0.75em;">Postal Code:</td>
<td><input style="font-size:0.75em;" data-braintree-name="postal_code" name="postal_code" id="postal_code" value=""/></td>
</tr>
<tr>
<td style="padding-left:0.75em;">Card Number:</td>
<td><input style="font-size:0.75em;" data-braintree-name="number" name="number" id="number" value=""/></td>
</tr>
<tr>
<td style="padding-left:0.75em;">Expiration Month:</td>
<td><input style="font-size:0.75em;" data-braintree-name="expiration_month" name="expiration_month" id="expiration_month" value=""/></td>
</tr>
<tr>
<td style="padding-left:0.75em;">Expiration Year:</td>
<td><input style="font-size:0.75em;" data-braintree-name="expiration_year" name="expiration_year" id="expiration_year" value=""/></td>
</tr>
<tr>
<td style="padding-left:0.75em;">CVV:</td>
<td><input style="font-size:0.75em;" data-braintree-name="cvv" name="cvv" id="cvv" value=""/> </td>
</tr>
<tr>
<td style="padding-left:0.75em;">Random:</td>
<td><input style="font-size:0.75em;" name="random" id="random" value=""/></td>
</tr>
<tr>
<td style="padding-left:0.75em;">Nonce:</td>
<td><input type="text" style="font-size:0.75em;" name="nonce" id="nonce" value=""/></td>
</tr>
</table>
<div style="padding-top:0.25em;padding-bottom:0.25em;text-align:center;"><span><input style="font-size:0.5em;" type="submit"
id="submit" value="SUBMIT"/></span></div>
</div>
</form>
如何获取要发布的随机数输入字段。随机文本输入字段也不发布。
答案 0 :(得分：3)
问题可能在于tokenizeCard进行异步调用以获取nonce。事件的流程就像这样：
submit form begins -> tokenizing begins -> submit form ends ->
(somewhere here the promise is resolved - the result comes back from the server)
-> tokenizing ends
您可以做的是将return false添加到提交侦听器的末尾（条件是nonce字段的空白），然后再次从客户端回调调用submit（不再从服务器获取nonce）。它看起来像这样：
$('#checkout').on("submit", function() {
//I could be wrong in the condition below - it may be undefined
if($("#checkout input[name=nonce]").val() === ''){
var client = new braintree.api.Client({clientToken: "<?php echo $clientToken ?>"});
client.tokenizeCard({
number: $('#number').val(),
cardholderName: $('#first_name').val() + ' ' + $('#last_name').val(),
expirationMonth: $('#expiration_month').val(),
expirationYear: $('#expiration_year').val(),
cvv: $('#cvv').val(),
}, function (err, nonce) {
$("#checkout input[name=nonce]").val(nonce);
$('#checkout input[name=random]').val('randomtext');
$('#checkout').submit();
});
return false; //stops form submitting
} else {
return true; //continues form submitting
}
});
编辑：这个小提琴完全代表您的问题
$("#form").submit(function(){
alert("submit invoked!");
if($("#writeMe").val() === ''){
writeValue();
alert("submit not done - writeValue invoked");
} else {
alert("submit actually done");
}
return false;
});
function writeValue(){
setTimeout(function() {
alert("result's back -> gonna submit again");
$("#writeMe").val("written");
$("#form").submit();
}, 1000);
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script>
<form id="form">
<input type="text" readonly id="writeMe" />
<input type="submit" value="Submit me!" />
</form>