接收webhook事件

{

 "botid":<BOT_ID>,

 "time":1512353744843,

 "messaging":[

   {

     "sender_id":<SENDER_ID>,

     "message":{

       "text":"Hello~"

     }

   }

 ]

}

{

 "botid":<BOT_ID>,

 "time":1512353744843,

 "messaging":[

   {

     "sender_id":<SENDER_ID>,

     "message":{

       "sticker":{

         "group":<STICKER_GROUP>

         "id":<STICKER_ID>

       }

     }

   }

 ]

}

var crypto = require('crypto');

var hmac = crypto.createHmac('sha1', <APP_SECRET>);

hmac.update(JSON.stringify(req.body), 'utf-8');

var expectedSignature = 'sha1=' + hmac.digest('hex');

if (req.headers['x-baha-data-signature'] != expectedSignature) {

 console.log('not ok');

} else {

 console.log('ok');

}

$body = file_get_contents("php://input");

$signature = $_SERVER['HTTP_X_BAHA_DATA_SIGNATURE'];

$expectedOutput = 'sha1='.hash_hmac('sha1', $body, <APP_SECRET>, false);

if ($signature !== $expectedOutput) {

 echo 'not ok';

} else {

 echo 'ok';

}