app.post('/webhook', (req, res) => {
bugsnag.autoNotify(() => {
let 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((pageEntry) => {
let pageID = pageEntry.id
let timeOfEvent = pageEntry.time
// Iterate over each messaging event
pageEntry.messaging.forEach((messagingEvent) => {
if (messagingEvent.message) {
receivedMessage(messagingEvent)
} else {
let dataToAppend = "Webhook received unknown messagingEvent: " + messagingEvent
fs.appendFile('fb.log', dataToAppend, (err) => {
})
}
})
})
// 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.
res.sendStatus(200)
}
})
})
app.get('/webhook', (req, res) => {
bugsnag.autoNotify(() => {
if (req.query['hub.mode'] === 'subscribe' &&
req.query['hub.verify_token'] === VALIDATION_TOKEN) {
console.log("Validating webhook")
res.status(200).send(req.query['hub.challenge'])
} else {
console.error("Failed validation. Make sure the validation tokens match.")
res.sendStatus(403)
}
})
})