[英]Facebook iOS SDK Login Fails On First Attempt but Successful on Second
[英]Payments Lite (serverless): first purchase works, but the second always fails
在Facebook上作为Canvas应用托管的文字游戏中,我想出售一种消耗性的“ 1年VIP状态”,通过使用Facebook Payments Lite(无服务器)让玩家临时进入游戏中的某些区域。
我的JavaScript代码显示“ 付款对话框” ,然后将signed_request传递给我的PHP脚本-
我的Canvas应用中的JavaScript代码:
function buyVip() {
var obj = {
method: "pay",
action: "purchaseiap",
product_id: "test1"
};
FB.ui(obj, function(data) {
$.post("/payment-lite.php",
{ signed_request: data.signed_request })
.done(function(data) {
location.reload();
});
});
}
我的PHP脚本/payment-lite.php:
const APP_SECRET = 'XXXXXXX';
$request = parse_signed_request($_POST['signed_request'], APP_SECRET);
error_log(print_r($request, TRUE));
// TODO validate $request and set the user VIP status in the game database
function parse_signed_request($signed_request, $secret) {
list($encoded_sig, $payload) = explode('.', $signed_request, 2);
$sig = base64_url_decode($encoded_sig);
$data = json_decode(base64_url_decode($payload), TRUE);
if (strtoupper($data['algorithm']) !== 'HMAC-SHA256') {
error_log('Unknown algorithm. Expected HMAC-SHA256');
return NULL;
}
$expected_sig = hash_hmac('sha256', $payload, $secret, $raw = TRUE);
if ($sig !== $expected_sig) {
error_log('Bad Signed JSON signature!');
return NULL;
}
return $data;
}
function base64_url_decode($input) {
return base64_decode(strtr($input, '-_', '+/'));
}
在应用程序仪表板-> Web Payments中,我添加了一个测试用户和一个带有“产品ID” test1
且价格为0.01欧元的测试产品:
最终,我以测试用户身份登录,然后在应用程序中按一个调用buyVip
方法的按钮-导致出现“ 付款”对话框 :
然后在服务器日志中,我看到payment.php
脚本被成功调用:
[30-Jul-2017 14:34:20 Europe/Berlin] Array
(
[algorithm] => HMAC-SHA256
[amount] => 0.01
[app_id] => 376218039240910
[currency] => EUR
[issued_at] => 1501418059
[payment_id] => 1084810821649513
[product_id] => test1
[purchase_time] => 1501418057
[purchase_token] => 498440660497153
[quantity] => 1
[status] => completed
)
但是,当我稍后尝试相同的过程时,出现“ 付款”对话框 ,但在按“ 购买”按钮后出现错误,然后失败
处理您的付款时出现问题:抱歉,我们无法处理您的付款。 您尚未为此交易付费。 请再试一次。
在浏览器控制台中,我看到1383001未知错误代码:
{error_code:1383001,error_message:“处理您的付款时出现问题:很抱歉,此交易已收取n费用。请重试。”}
请问是什么意思,为什么第一次购买请求成功,但是随后失败?
在我的应用程序中,我当然会在成功购买后隐藏“购买VIP身份”按钮一年,但是我仍然想知道这里发生了什么。
同样,将来我想在游戏中出售诸如“硬币”之类的消耗性虚拟商品,然后多次购买应会成功。
更新:
我尝试通过将以下代码添加到我的payment.php
(使用APP_ID | APP_SECRET代替所需的用户访问令牌)来消耗购买的商品:
$post = [
'access_token' => APP_ID . '|' . APP_SECRET,
];
$ch = curl_init('https://graph.facebook.com/498440660497153/consume');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
$response = curl_exec($ch);
curl_close($ch);
error_log(print_r($response, TRUE));
但不幸的是得到了错误:
{“ error”:{“ message”:“不支持的发布请求。ID为'498440660497153'的对象不存在,由于权限丢失而无法加载,或不支持此操作。请阅读Graph API文档,网址为https:// /developers.facebook.com/docs/graph-api“,”类型“:” GraphMethodException“,”代码“:100,” fbtrace_id“:” HDusTBubydJ“}}
在创建具有相同product_id的新商品之前,您应该为该用户使用以前的购买商品。 这样做是为了防止用户为非消耗性物品多次购买同一物品。
FB.api(
'/' + PURCHASE_TOKEN + '/consume', // Replace the PURCHASE_TOKEN
'post',
{access_token: access_token}, // Replace with a user access token
result => {
console.log('consuming product', productId, 'with purchase token', purchaseToken);
console.log('Result:');
console.log(result);
}
);
https://developers.facebook.com/docs/games_payments/payments_lite#using
更新:
如果您想通过服务器消费,可以将access_token传递给您的php脚本。
$.post("/words/facebook/payment.php", { access_token: access_token })
要获取access_token,您可以使用它。
var access_token = '';
FB.getLoginStatus(function(response) {
if (response.status === 'connected') {
access_token = response.authResponse.accessToken;
}
});
我正在回答自己的问题,以根据Alexey Mukhin的有用答复分享通过Facebook Payments Lite出售消费性虚拟商品所需的完整源代码-
您的Facebook Canvas应用中的JavaScript代码(分配给按钮-ONCLICK):
function buyItemLite() {
var payDialog = {
method: "pay",
action: "purchaseiap",
product_id: "test1"
};
FB.ui(payDialog, function(payResponse) {
FB.getLoginStatus(function(loginResponse) {
if (loginResponse.status === "connected") {
$.post("/payment-lite.php", {
signed_request: payResponse.signed_request,
access_token: loginResponse.authResponse.accessToken
})
.done(function(consumeResponse) {
location.reload();
});
}
});
});
}
Web服务器上托管的payment-lite.php脚本中的PHP代码:
const APP_ID = 'replace by your app id';
const APP_SECRET = 'replace by your app secret';
const SIGNED_REQUEST = 'signed_request';
const STATUS = 'status';
const COMPLETED = 'completed';
const PRODUCT_ID = 'product_id';
const PURCHASE_TOKEN = 'purchase_token';
const ACCESS_TOKEN = 'access_token';
const CONSUME_URL = 'https://graph.facebook.com/%d/consume';
$request = parse_signed_request($_REQUEST[SIGNED_REQUEST], APP_SECRET);
error_log('pay dialog request: ' . print_r($request, TRUE));
if ($request[STATUS] === COMPLETED && $request[PRODUCT_ID] === 'test1') {
# perform POST request to consume the purchase_token
$url = sprintf(CONSUME_URL, $request[PURCHASE_TOKEN]);
$fields = array(ACCESS_TOKEN => $_REQUEST[ACCESS_TOKEN]);
$client = curl_init($url);
curl_setopt($client, CURLOPT_RETURNTRANSFER, true);
curl_setopt($client, CURLOPT_POSTFIELDS, $fields);
$response = curl_exec($client);
curl_close($client);
error_log('consume response: ' . print_r($response, TRUE));
# TODO give the player the newly purchased consumable "test1" product
}
function parse_signed_request($signed_request, $secret) {
list($encoded_sig, $payload) = explode('.', $signed_request, 2);
$sig = base64_url_decode($encoded_sig);
$data = json_decode(base64_url_decode($payload), TRUE);
if (strtoupper($data['algorithm']) !== 'HMAC-SHA256') {
error_log('Unknown algorithm. Expected HMAC-SHA256');
return NULL;
}
$expected_sig = hash_hmac('sha256', $payload, $secret, $raw = TRUE);
if ($sig !== $expected_sig) { // or better use hash_equals
error_log('Bad Signed JSON signature!');
return NULL;
}
return $data;
}
function base64_url_decode($input) {
return base64_decode(strtr($input, '-_', '+/'));
}
注意:如果您碰巧具有最新的PHP版本,则最好在上面的代码中使用hash_equals ,以减轻计时攻击 。
不要忘记在应用程序的Facebook仪表板中启用Payments Lite,并在其中添加“ test1”产品:
如果您按照上述说明进行操作,则可以多次购买“ test1”项目,并且您在PHP日志中获得的输出将类似于:
pay dialog request: Array
(
[algorithm] => HMAC-SHA256
[amount] => 0.01
[app_id] => 376218039240910
[currency] => EUR
[issued_at] => 1501674845
[payment_id] => 1041009052696057
[product_id] => test1
[purchase_time] => 1501674843
[purchase_token] => 499658830375336
[quantity] => 1
[status] => completed
)
consume response: {"success":true}
最后,我将在我的webhook代码下面分享非轻型Facebook Payments ,因为这实际上是我最终使用的代码(它可以处理退款,并且不需要在购买后标记消耗品 )-
您的Facebook Canvas应用中的JavaScript代码(分配给按钮-ONCLICK):
function buyItemFull() {
var payDialog = {
method: "pay",
action: "purchaseitem",
product: "https://myserver/test1.html"
};
FB.ui(payDialog, function(data) {
location.reload();
});
}
Web服务器上托管的payment-full.php脚本中的PHP代码:
const APP_ID = 'replace by your app id';
const APP_SECRET = 'replace by your app secret';
const HUB_MODE = 'hub_mode';
const HUB_CHALLENGE = 'hub_challenge';
const HUB_VERIFY_TOKEN = 'hub_verify_token';
const SUBSCRIBE = 'subscribe';
const ENTRY = 'entry';
const CHANGED_FIELDS = 'changed_fields';
const ID = 'id';
const USER = 'user';
const ACTIONS = 'actions';
const ITEMS = 'items';
const PRODUCT = 'product';
const AMOUNT = 'amount';
# payment status can be initiated, failed, completed
const STATUS = 'status';
const COMPLETED = 'completed';
# possible payment event types are listed below
const TYPE = 'type';
const CHARGE = 'charge';
const CHARGEBACK_REVERSAL = 'chargeback_reversal';
const REFUND = 'refund';
const CHARGEBACK = 'chargeback';
const DECLINE = 'decline';
const GRAPH = 'https://graph.facebook.com/v2.10/%d?access_token=%s|%s&fields=user,actions,items';
const TEST1 = 'https://myserver/test1.html';
# called by Facebook Dashboard when "Test Callback URL" button is pressed
if (isset($_GET[HUB_MODE]) && $_GET[HUB_MODE] === SUBSCRIBE) {
print($_GET[HUB_CHALLENGE]);
exit(0);
}
# called when there is an update on a payment (NOTE: better use hash_equals)
$body = file_get_contents('php://input');
if ('sha1=' . hash_hmac('sha1', $body, APP_SECRET) != $_SERVER['HTTP_X_HUB_SIGNATURE']) {
error_log('payment sig=' . $_SERVER['HTTP_X_HUB_SIGNATURE'] . ' does not match body=' . $body);
exit(1);
}
# find the updated payment id and what has changed: actions or disputes
$update = json_decode($body, TRUE);
error_log('payment update=' . print_r($update, TRUE));
$entry = array_shift($update[ENTRY]);
$payment_id = $entry[ID];
$changed_fields = $entry[CHANGED_FIELDS];
if (!in_array(ACTIONS, $changed_fields)) {
error_log('payment actions has not changed');
exit(0);
}
# fetch the updated payment details: user, actions, items
$graph = sprintf(GRAPH, $payment_id, APP_ID, APP_SECRET);
$payment = json_decode(file_get_contents($graph), TRUE);
error_log('payment details=' . print_r($payment, TRUE));
# find the user id who has paid
$uid = $payment[USER][ID];
# find the last action and its status and type
$actions = $payment[ACTIONS];
$action = array_pop($actions);
$status = $action[STATUS];
$type = $action[TYPE];
$price = $action[AMOUNT];
# find which product was purchased
$items = $payment[ITEMS];
$item = array_pop($items);
$product = $item[PRODUCT];
error_log("payment uid=$uid status=$status type=$type product=$product price=$price");
if ($status != COMPLETED) {
error_log('payment status is not completed');
exit(0);
}
# money has been received, update the player record in the database
if ($type === CHARGE || $type === CHARGEBACK_REVERSAL) {
if ($product === TEST1) {
# TODO give the player the purchased "test1" product
}
} else if ($type === REFUND || $type === CHARGEBACK || $type === DECLINE) {
# TODO take away from the player the "test1" product
}
不要忘记在应用程序的Facebook仪表板中禁用Payments Lite ,并在此处添加“ payment-full.php” webhook:
最后,在您的Web服务器上添加“ test1.html”产品文件:
<!DOCTYPE html><html>
<head prefix=
"og: http://ogp.me/ns#
fb: http://ogp.me/ns/fb#
product: http://ogp.me/ns/product#">
<meta property="og:type" content="og:product" />
<meta property="og:title" content="Test1" />
<meta property="og:image" content="https://myserver/icon-50x50.png" />
<meta property="og:description" content="Test1" />
<meta property="og:url" content="https://myserver/test1.html" />
<meta property="product:price:amount" content="0.01"/>
<meta property="product:price:currency" content="EUR"/>
</head>
</html>
当前在网络上没有很多Facebook付款示例。
因此,如果您发现我的源代码(公共领域许可)很有用,请对问题和答案进行投票,以帮助其他开发人员发现它。
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