Facebook Messenger API：发布请求返回错误500

1. 我的postwebhook：

   router.post('/webhook', function (req, res) { var data = req.body; // Make sure this is a page subscription if (data.object == 'page') { // Iterate over each entry // There may be multiple if batched data.entry.forEach(function(pageEntry) { var pageID = pageEntry.id; var timeOfEvent = pageEntry.time; // Iterate over each messaging event pageEntry.messaging.forEach(function(messagingEvent) { if (messagingEvent.optin) { receivedAuthentication(messagingEvent); } else if (messagingEvent.message) { receivedMessage(messagingEvent); } else if (messagingEvent.delivery) { receivedDeliveryConfirmation(messagingEvent); } else if (messagingEvent.postback) { receivedPostback(messagingEvent); } else if (messagingEvent.read) { receivedMessageRead(messagingEvent); } else if (messagingEvent.account_linking) { receivedAccountLink(messagingEvent); } else { console.log("Webhook received unknown messagingEvent: ", messagingEvent); } }); }); // Assume all went well. // // You must send back a 200, within 20 seconds, to let us know // you've successfully received the callback. Otherwise, the request // will time out and we will keep trying to resend. res.sendStatus(200); } }); 

2.my receivedMessage函数：

 function receivedMessage(event) { var senderID = event.sender.id; var recipientID = event.recipient.id; var timeOfMessage = event.timestamp; var message = event.message; console.log("Received message for user %d and page %d at %d with message:", senderID, recipientID, timeOfMessage); console.log(JSON.stringify(message)); var messageId = message.mid; var messageText = message.text; var messageAttachments = message.attachments; if (messageText) { // If we receive a text message, check to see if it matches a keyword // and send back the example. Otherwise, just echo the text we received. switch (messageText) { case 'generic': sendGenericMessage(senderID); break; default: sendTextMessage(senderID, messageText); } } else if (messageAttachments) { sendTextMessage(senderID, "Message with attachment received"); } } 

这是服务器日志时，我运行我的代码与sendTextMessage调用callsend API，我认为我的代码失败：

2017-03-17T10：06：11.296017 + 00：00 app [web.1]：收到用户1367047720019479和1334554393257327在1489745171043的留言：2017-03-17T10：06：11.298010 + 00：00 app [web。 1]：{“mid”：“mid。$ cAAS9xUXoM5lhDQCaY1a27tcMAHJS”，“seq”：157393，“text”：“testing message”} 2017-03-17T10：06：11.298044 + 00：00 app [web.1]： {“recipient”：{“id”：“1367047720019479”}，“message”：{“text”：“testing message”}} 2017-03-17T10：06：11.298649 + 00：00 app [web.1] POST / webhook / 200 3.244 ms – 2

现在当我包括sendtext和callSendAPI：

 function sendTextMessage(recipientId, messageText) { var messageData = { recipient: { id: recipientId }, message: { text: messageText } }; console.log(JSON.stringify(messageData)); callSendAPI(messageData); } function callSendAPI(messageData) { ***console.log("inside the call api");*** request.post({ uri: 'https://graph.facebook.com/v2.6/me/messages', qs: { access_token: access }, //method: 'POST', json: messageData }, function (error, response, body) { if (!error && response.statusCode == 200) { var recipientId = body.recipient_id; var messageId = body.message_id; console.log("Successfully sent generic message with id %s to recipient %s", messageId, recipientId); } else { console.error("Unable to send message."); console.error(response); console.error(error); } }); } 

这是它给出的输出：

2017-03-17T10：09：38.141702 + 00：00 app [web.1]：收到用户1367047720019479和1334554393257327在1489745373029的留言：2017-03-17T10：09：38.141719 + 00：00 app [web。 1]：{“mid”：“mid。$ cAAS9xUXoM5lhDQOvZVa275xBT7LW”，“seq”：157396，“text”：“testing message”} 2017-03-17T10：09：38.141757 + 00：00 app [web.1]： {“recipient”：{“id”：“1367047720019479”}，“message”：{“text”：“testing message”}} 2017-03-17T10：09：38.141778 + 00：00 app [web.1] 在通话API中 2017-03-17T10：09：38.143120 + 00：00 app [web.1]： POST / webhook / 500 1.686 ms – 253

请帮助我如何解决这个错误：所有的令牌设置正确的页面访问和validation令牌。我是新来的Messenger平台