在Facebook Instant Games Webhook中未定義sendMessage

Question

我已經部署了一個Webhook，以使Messenger機器人在玩家退出游戲時運行。 我正在嘗試實現此功能： https : //developers.facebook.com/docs/games/instant-games/getting-started/bot-setup/#step-3--respond-to-messaging-game-plays-網絡掛接

其他所有工作正常，但是當腳本部署到sendMessage時出現錯誤。 它沒有說：

2019-03-11T15:11:16.289939+00:00 app[web.1]: ReferenceError: sendMessage is not defined

盡管我確實知道此錯誤是因為在腳本的任何地方都沒有定義sendMessage，但是在瀏覽了所有文檔之后，我不確定在sendMessage中到底要寫什么才能使腳本正常工作。

這是我的webhook終點：

// Creates the endpoint for our webhook 
app.post('/webhook', (req, res) => {  

let body = req.body;
console.log("body post : "+JSON.stringify(body));

// Checks this is an event from a page subscription
if (body.object === 'page') {

  // Iterates over each entry - there may be multiple if batched
  body.entry.forEach(function(entry) {
    console.log(JSON.stringify(entry));

    // Gets the message. entry.messaging is an array, but 
    // will only ever contain one message, so we get index 0
    let event = entry.messaging[0];
      // Get the sender PSID
      let sender_psid = event.sender.id;
      console.log('Sender PSID: ' + sender_psid);

      if(event.game_play){
        var senderId = event.sender.id; // Messenger sender id
        var playerId = event.game_play.player_id; // Instant Games player id
        var contextId = event.game_play.context_id; 
        var payload = event.game_play.payload;
          sendMessage(
            senderId, 
            contextId, 
            'Congratulations on your victory!', 
            'Play Again'
          );
      } else if (event.postback) {
        handlePostback(sender_psid, event.postback);
      }
  });

  // Returns a '200 OK' response to all requests
  res.status(200).send('EVENT_RECEIVED');
} 
});

請幫忙

Answer 1

您調用沒有實現的sendMessage方法：

sendMessage(
  senderId, 
  contextId, 
  'Congratulations on your victory!', 
  'Play Again'
);

您應該確保具有使用Messenger Send API的此方法的實現。