How to write the Alipay interface for the Douyin mini program?

The process of connecting Douyin to Alipay

First, obtain the SP order number provided by Douyin through the server;

Then send the SP order number and other data to Alipay.

Then pass the information returned by Alipay back to the Douyin side so that the payment is connected.

include 'alipay.class.php';

include 'AopSdk.php';

$risk_info=json_encode(array('ip'=>$_SERVER['REMOTE_ADDR']));
$array=array(
'app_id'=>'800117472149',
'method'=>'tp.trade.create',
'charset'=>'utf-8',
'sign_type'=>'MD5',
'timestamp'=>time(),
'version'=>'1.0',
'out_order_no'=>'20190727000',
'uid'=>'4ybyfXwNMulvUhBT',
'merchant_id'=>'1900011759',
'total_amount'=>100,
'currency'=>'CNY',
'subject'=>'Merchant order name',
'body'=>'Merchant order details',
'trade_time'=>time(),
'valid_time'=>'20',
'notify_url'=>'https://www.juxunapp.com/',
'risk_info'=>$risk_info
);

$aplipay = new alipay($array);

$res=$aplipay->pay();
app_id = isset($args['app_id']) ? $args['app_id'] : null;
$this->method = isset($args['method']) ? $args['method'] : null;
$this->charset = isset($args['charset']) ? $args['charset'] : null;
$this->sign_type = isset($args['sign_type']) ? $args['sign_type'] : null;
$this->timestamp = isset($args['timestamp']) ? $args['timestamp'] : null;
$this->version = isset($args['version']) ? $args['version'] : null;
$this->out_order_no = isset($args['out_order_no']) ? $args['out_order_no'] : null;
$this->uid = isset($args['uid']) ? $args['uid'] : null;
$this->merchant_id = isset($args['merchant_id']) ? $args['merchant_id'] : null;
$this->total_amount = isset($args['total_amount']) ? $args['total_amount'] : null;
$this->currency = isset($args['currency']) ? $args['currency'] : null;
$this->subject = isset($args['subject']) ? $args['subject'] : null;
$this->body = isset($args['body']) ? $args['body'] : null;
$this->trade_time = isset($args['trade_time']) ? $args['trade_time'] : null;
$this->valid_time = isset($args['valid_time']) ? $args['valid_time'] : null;
$this->notify_url = isset($args['notify_url']) ? $args['notify_url'] : null;
$this->risk_info = isset($args['risk_info']) ? $args['risk_info'] : null;
$biz_content = json_encode(array(
'out_order_no'=>$this->out_order_no,
'uid'=>$this->uid,
'merchant_id'=>$this->merchant_id,
'total_amount'=>$this->total_amount,
'currency'=>$this->currency,
'subject'=>$this->subject,
'body'=>$this->body,
'trade_time'=>$this->trade_time,
'valid_time'=>$this->valid_time,
'notify_url'=>$this->notify_url,
'risk_info'=>$this->risk_info
));

$this->biz_content=$biz_content;

$sign['app_id']=$this->app_id;
$sign['method']=$this->method;
$sign['charset']=$this->charset;
$sign['sign_type']=$this->sign_type;
$sign['timestamp']=$this->timestamp;
$sign['version']=$this->version;
$sign['biz_content']=$this->biz_content;

$this->sign = md5($this->getSignContent($sign,'utf-8','gx9j1saqpjkjgp024kzm6ypncfufruaxk76xk12b'));

}
public function pay() {
$url="https://tp-pay.snssdk.com/gateway";
$data=array('app_id'=>$this->app_id,'method'=>$this->method,'charset'=>$this->charset,'sign_type'=>$this->sign_type,'sign'=>$this->sign,'timestamp'=>$this->timestamp,'version'=>$this->version,'biz_content'=>$this->biz_content);
$res = json_decode($this->send_post($url,$data),true);
//Here we need to return the data to the front end, and pull up the Alipay cashier through the front end

$ali_data=array(
'body'=>$this->body,
'subject'=>$this->subject,
'body'=>$this->body,
'fee'=>$this->total_amount
);
$ali_data2=array(
'trade_no'=>$res['response']['trade_no']
);

$config=array(
'ali_app_app_id'=>'2019121069845600',
'ali_app_rsa_pri_key'=>'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',
'ali_app_pay_rsa_pub_key'=>'MIIAIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxAfJcO3atT9LofwrDJuZP09nzUgNW5VKdZmSxHnXLqjzo+w2AIbBVmURTLtyDFAJAB19QZ2BXNtll2pb8rXonqQHZFi+5+cyB2/pLKRRNdaqGlQTbLShpbFhPrVNUFgg/zb2O5XiL1PXH3abNY45fVTiyseDJbIlGq1SeH12A5f5UZTA+/bsUTe2HLgupGltTNA3/OwBsw2u3zgr/aYjsj9mf029+HbzZtVMpJlQ2If80tcE9k8U75u+21H/ujDjKYThVbAKQPDSoUmLWlFPasExqRsKffIZdxbANNsKnXpJAP00NA0Nk06d3xmjfYdZiQtkpMo0myKF5JWUGRz7wwIDAQAB',
);

$website="https://www.juxunapp.com/";
$data2 = [];
$data2['trade_no'] = $res['response']['trade_no']; //The trade_no order number just obtained
$data2['app_id'] = $this->app_id; //ID assigned by Toutiao Payment to the business party
$data2['sign_type'] = $this->sign_type; //MD5 used by Toutiao
$data2['timestamp'] = (string)$this->timestamp; //Time when the request is sent
$data2['merchant_id'] = $this->merchant_id; //Merchant ID assigned by Toutiao Payment to the business party
$data2['uid'] = $this->uid; //Uniquely identifies the user open_id (this is Toutiao's)
$data2['total_amount'] = $this->total_amount; //Amount, divided into units, should be passed as integer
$data2['params'] = json_encode(['url' => $this->aliapppaytest($ali_data , $biz_content , $ali_data2 , $website , $config)]); //Here are the request parameters for Alipay APP payment. I used Alipay SDK here

$stringToBeSigned = $this->getSignContent($data2, $this->charset, 'gx9j1saqpjkjgp024kzm6ypncfufruaxk76xk12b'); //Sign the above parameters again
$data2["sign"] = md5($stringToBeSigned);

$data2['pay_channel'] = "ALIPAY_NO_SIGN";
$data2["pay_type"] = "ALIPAY_APP";
$data2['method'] = 'tp.trade.confirm';
$data2['risk_info'] = $this->risk_info;
return ['error'=>0 , 'msg'=>'success' , 'data'=>$data2]; // Return these parameters to the front end for processing

//return $res;
//return json_encode($this->alipayData($res));
}

public function aliapppaytest($data, $biz_content, $data2, $website, $config){
require 'AopSdk.php';
$aop = new \AopClient();
$aop->gatewayUrl = "https://openapi.alipay.com/gateway.do";
$aop->appId = $config['ali_app_app_id']; //Alipay APPID
$aop->rsaPrivateKey = $config['ali_app_rsa_pri_key']; //Alipay secret key
$aop->format = "json";
$aop->charset = "UTF-8";
$aop->signType = "RSA2";
$aop->alipayrsaPublicKey = $config['ali_app_pay_rsa_pub_key']; //Alipay public key

//Instantiate the request class corresponding to the specific API. The class name corresponds to the interface name. The current calling interface name is: alipay.trade.app.pay
$request = new AlipayTradeAppPayRequest(); //SDK has encapsulated the public parameters, only the business parameters need to be passed in here
$data2 = [
'body' => $data['body'],
'subject' => $data['subject'],
'out_trade_no' => $data2['trade_no'],
'timeout_express' => '30m',
'total_amount' => $data['fee']/1000,
'product_code' => 'QUICK_MSECURITY_PAY',
];
$postdata = json_encode($data2);
$request->setNotifyUrl($website . '/payment/toutiao/notify.php'); //Server asynchronous notification http address);
$request->setBizContent($postdata);
//$response = $aop->sdkExecute($request); //This is different from the normal interface call, using sdkExecute

$response = $aop->sdkExecute($request);

//htmlspecialchars is used to prevent the browser from escaping the key parameter HTML when outputting to the page. This problem will not occur when printing to the log or transmitting via HTTP.
// return htmlspecialchars($str); // orderString can be directly requested to the client without further processing.
return $response; //OrderString can be directly sent to the client request without further processing.
}

public function alipayData($res){

$biz_content=json_encode(array(
'subject'=>$this->subject,
'out_trade_no'=>$this->out_order_no,
'total_amount'=>$this->total_amount,
'product_code'=>"QUICK_MSECURITY_PAY"

));

$url=array(
'app_id'=>$this->app_id,
'biz_content'=>$biz_content,
'charset'=>$this->charset,
'method'=>'alipay.trade.app.pay',
'notify_url'=>$this->notify_url,
'sign'=>$res['sign'],
'sign_type'=>'RSA2',
'timestamp'=>time(),
'version'=>$this->version
);

$url = $this->getSignContent($url,'utf-8','');

$data=array(
'app_id'=>$this->app_id,
'sign_type'=>'MD5',
'timestamp'=>(string)$this->timestamp,
'trade_no'=>$res['response']['trade_no'],
'merchant_id'=>'1900011747',
'uid'=>'4ybyfXwNMulvUhBT',
'total_amount'=>100,
'params'=>json_encode(array('url'=>$url)),
'sign'=>$this->sign,
'method'=>'tp.trade.confirm',
'pay_channel'=>'ALIPAY_NO_SIGN',
'pay_type'=>'ALIPAY_APP',
'risk_info' => $this->risk_info
);

return $data;
}

public function getSignContent($params, $charset,$app_secret) {
ksort($params);
$stringToBeSigned = "";
$i = 0;
foreach ($params as $k => $v) {
if (false === $this->checkEmpty($v) && "@" != substr($v, 0, 1)) {
// Convert to target character set
$v = $this->characet($v, $charset);
if ($i == 0) {
$stringToBeSigned .= "$k" . "=" . "$v";
} else {
$stringToBeSigned .= "&" . "$k" . "=" . "$v";
}
$i++;
}
}
$stringToBeSigned = $stringToBeSigned.$app_secret;

unset ($k, $v);
return $stringToBeSigned;
}
public function checkEmpty($value) {
if (!isset($value))
return true;
if ($value === null)
return true;
if (trim($value) === "")
return true;
return false;
}

public function characet($data, $targetCharset) {
if (!empty($data)) {
$fileType = "UTF-8";
if (strcasecmp($fileType, $targetCharset) != 0) {
$data = mb_convert_encoding($data, $targetCharset, $fileType);
}
}
return $data;
}

public function send_post($url, $post_data) {
$postdata = http_build_query($post_data);
$options = array(
'http' => array(
'method' => 'POST',
'header' => 'Content-type:application/x-www-form-urlencoded',
'content' => $postdata,
'timeout' => 15 * 60 // timeout (unit: s)
)
);
$context = stream_context_create($options);
$result = file_get_contents($url, false, $context);
return $result;

}

}

?>

Page({
data: {},
onLoad: function () {

},
pay: function () {
tt.request({
url: 'https://www.juxunapp.com/alipay2/aop/test/index.php', // target server url
success: function (res) {
console.log(res.data.data)
tt.requestPayment({
data:res.data.data,
success(res) {
console.log(res);
},
fail(res) {
console.log(res);
}
})
}
});

}
});