Facebook アカウントのパスワードを変更したら、作成した Facebook Messenger ボットがメッセージに応答できなくなりました。
Heroku ログに次のエラーが表示されます。
2016-12-28T22:19:32.647313+00:00 heroku[router]: at=info method=POST path="/webhook" host=messengerrainbot.herokuapp.com request_id=0a347c11-4d67-4dcf-ae3b-2b8d4cc55b8d fwd="66.220.156.117" dyno=web.1 connect=0ms service=3ms status=200 bytes=196
2016-12-28T22:19:32.749540+00:00 app[web.1]: Error: { message: 'Error validating access token: The session has been invalidated because the user has changed the password.',
2016-12-28T22:19:32.749560+00:00 app[web.1]: type: 'OAuthException',
2016-12-28T22:19:32.749561+00:00 app[web.1]: code: 190,
2016-12-28T22:19:32.749562+00:00 app[web.1]: error_subcode: 460,
2016-12-28T22:19:32.749563+00:00 app[web.1]: fbtrace_id: 'FlCFAaxy8j3' }
新しいセッション アクセス トークンを取得する方法がどこにも見つかりません。
すべてを制御する私のindex.jsファイル:
var express = require('express');
var bodyParser = require('body-parser');
var request = require('request');
var app = express();
app.use(bodyParser.urlencoded({extended: false}));
app.use(bodyParser.json());
app.listen((process.env.PORT || 3000));
// Server frontpage
app.get('/', function (req, res) {
res.send('This is TestBot Server');
});
// Facebook Webhook
app.get('/webhook', function (req, res) {
if (req.query['hub.verify_token'] === 'EAAWWpxUBMGoBANlKHUR63Dz2WLZBMHACQRi65zwj46wFSb3aJCThUV4BLwevZCciUDeyVnYpGcfgrzu0reh3XqKdTkZBxVA1HhIfrAhbQjsy5ABYfUFTbfAdck4QmH0vJV6ZCAgAcGdrBl3pMaTQa2eCrPetlsZBHXAjZBIuISOgZDZD') {
res.send(req.query['hub.challenge']);
} else {
res.send('Invalid verify token');
}
});
// handler receiving messages
app.post('/webhook', function (req, res) {
var events = req.body.entry[0].messaging;
for (i = 0; i < events.length; i++) {
var event = events[i];
if (event.message && event.message.text) {
sendMessage(event.sender.id, {text: "Hi. Send your location"}); // event.message.text
} else if (event.message && event.message.attachments && event.message.attachments[0] && event.message.attachments[0].payload && event.message.attachments[0].payload.coordinates) {
urlBase = "http://api.wunderground.com/api/57fd25cc02e9da86/conditions/forecast/alert/q/"
lat = event.message.attachments[0].payload.coordinates.lat
lon = event.message.attachments[0].payload.coordinates.long
totUrl = urlBase + String(lat) + "," + String(lon) + ".json"
request({
url: totUrl,
json: true
}, function (error, response, body) {
if (!error && response.statusCode === 200) {
var rain = body.current_observation.precip_1hr_metric
if (rain > 0) {
sendMessage(event.sender.id, {text: "It's gonna rain. Grab an umbrella!"});
} else {
sendMessage(event.sender.id, {text: "No rain ahead!"});
}
}
})
}
events = []
}
req.body.entry[0].messaging = []
res.sendStatus(200);
});
// generic function sending messages
function sendMessage(recipientId, message) {
request({
url: 'https://graph.facebook.com/v2.6/me/messages',
qs: {access_token: process.env.PAGE_ACCESS_TOKEN},
method: 'POST',
json: {
recipient: {id: recipientId},
message: message,
}
}, function(error, response, body) {
if (error) {
console.log('Error sending message: ', error);
} else if (response.body.error) {
console.log('Error: ', response.body.error);
}
});
};
必要に応じて、完全な Github リポジトリへのリンク