带有 NodeJS webhook + CasperJS 的 FB Messenger Bot
FB Messenger Bot with NodeJS webhook + CasperJS
我跟着FB的tutorial做了一个FB聊天机器人。 Webhook 已成功创建，我现在想继续捕获 Facebook 用户的输入（发送到我的页面的消息），并将其用作我的 CasperJS 脚本的输入。最后，我想使用 CasperJS 脚本的输出并回复 Facebook 用户。
app.js在Facebook Messenger Bot中使用（基本上和例子给出的一样，只是改变了sendTextMessage(recipientId, messageText)函数：
/*
* Copyright 2016-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the license found in the
* LICENSE file in the root directory of this source tree.
*
*/
/* jshint node: true, devel: true */
'use strict';
const
bodyParser = require('body-parser'),
config = require('config'),
crypto = require('crypto'),
express = require('express'),
https = require('https'),
request = require('request');
var app = express();
app.set('port', process.env.PORT || 5000);
app.set('view engine', 'ejs');
app.use(bodyParser.json({ verify: verifyRequestSignature }));
app.use(express.static('public'));
/*
* Be sure to setup your config values before running this code. You can
* set them using environment variables or modifying the config file in /config.
*
*/
// App Secret can be retrieved from the App Dashboard
const APP_SECRET = (process.env.MESSENGER_APP_SECRET) ?
process.env.MESSENGER_APP_SECRET :
config.get('appSecret');
// Arbitrary value used to validate a webhook
const VALIDATION_TOKEN = (process.env.MESSENGER_VALIDATION_TOKEN) ?
(process.env.MESSENGER_VALIDATION_TOKEN) :
config.get('validationToken');
// Generate a page access token for your page from the App Dashboard
const PAGE_ACCESS_TOKEN = (process.env.MESSENGER_PAGE_ACCESS_TOKEN) ?
(process.env.MESSENGER_PAGE_ACCESS_TOKEN) :
config.get('pageAccessToken');
// URL where the app is running (include protocol). Used to point to scripts and
// assets located at this address.
const SERVER_URL = (process.env.SERVER_URL) ?
(process.env.SERVER_URL) :
config.get('serverURL');
if (!(APP_SECRET && VALIDATION_TOKEN && PAGE_ACCESS_TOKEN && SERVER_URL)) {
console.error("Missing config values");
process.exit(1);
}
/*
* Use your own validation token. Check that the token used in the Webhook
* setup is the same token used here.
*
*/
app.get('/webhook', function(req, res) {
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." + VALIDATION_TOKEN + ", " + req.query['hub.verify_token']);
res.sendStatus(403);
}
});
/*
* All callbacks for Messenger are POST-ed. They will be sent to the same
* webhook. Be sure to subscribe your app to your page to receive callbacks
* for your page.
* https://developers.facebook.com/docs/messenger-platform/product-overview/setup#subscribe_app
*
*/
app.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.
res.sendStatus(200);
}
});
/*
* This path is used for account linking. The account linking call-to-action
* (sendAccountLinking) is pointed to this URL.
*
*/
app.get('/authorize', function(req, res) {
var accountLinkingToken = req.query.account_linking_token;
var redirectURI = req.query.redirect_uri;
// Authorization Code should be generated per user by the developer. This will
// be passed to the Account Linking callback.
var authCode = "1234567890";
// Redirect users to this URI on successful login
var redirectURISuccess = redirectURI + "&authorization_code=" + authCode;
res.render('authorize', {
accountLinkingToken: accountLinkingToken,
redirectURI: redirectURI,
redirectURISuccess: redirectURISuccess
});
});
/*
* Verify that the callback came from Facebook. Using the App Secret from
* the App Dashboard, we can verify the signature that is sent with each
* callback in the x-hub-signature field, located in the header.
*
* https://developers.facebook.com/docs/graph-api/webhooks#setup
*
*/
function verifyRequestSignature(req, res, buf) {
var signature = req.headers["x-hub-signature"];
if (!signature) {
// For testing, let's log an error. In production, you should throw an
// error.
console.error("Couldn't validate the signature.");
} else {
var elements = signature.split('=');
var method = elements[0];
var signatureHash = elements[1];
var expectedHash = crypto.createHmac('sha1', APP_SECRET)
.update(buf)
.digest('hex');
if (signatureHash != expectedHash) {
throw new Error("Couldn't validate the request signature.");
}
}
}
/*
* Authorization Event
*
* The value for 'optin.ref' is defined in the entry point. For the "Send to
* Messenger" plugin, it is the 'data-ref' field. Read more at
* https://developers.facebook.com/docs/messenger-platform/webhook-reference/authentication
*
*/
function receivedAuthentication(event) {
var senderID = event.sender.id;
var recipientID = event.recipient.id;
var timeOfAuth = event.timestamp;
// The 'ref' field is set in the 'Send to Messenger' plugin, in the 'data-ref'
// The developer can set this to an arbitrary value to associate the
// authentication callback with the 'Send to Messenger' click event. This is
// a way to do account linking when the user clicks the 'Send to Messenger'
// plugin.
var passThroughParam = event.optin.ref;
console.log("Received authentication for user %d and page %d with pass " +
"through param '%s' at %d", senderID, recipientID, passThroughParam,
timeOfAuth);
// When an authentication is received, we'll send a message back to the sender
// to let them know it was successful.
sendTextMessage(senderID, "Authentication successful");
}
/*
* Message Event
*
* This event is called when a message is sent to your page. The 'message'
* object format can vary depending on the kind of message that was received.
* Read more at https://developers.facebook.com/docs/messenger-platform/webhook-reference/message-received
*
* For this example, we're going to echo any text that we get. If we get some
* special keywords ('button', 'generic', 'receipt'), then we'll send back
* examples of those bubbles to illustrate the special message bubbles we've
* created. If we receive a message with an attachment (image, video, audio),
* then we'll simply confirm that we've received the attachment.
*
*/
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 isEcho = message.is_echo;
var messageId = message.mid;
var appId = message.app_id;
var metadata = message.metadata;
// You may get a text or attachment but not both
var messageText = message.text;
var messageAttachments = message.attachments;
var quickReply = message.quick_reply;
if (isEcho) {
// Just logging message echoes to console
console.log("Received echo for message %s and app %d with metadata %s",
messageId, appId, metadata);
return;
} else if (quickReply) {
var quickReplyPayload = quickReply.payload;
console.log("Quick reply for message %s with payload %s",
messageId, quickReplyPayload);
sendTextMessage(senderID, "Quick reply tapped");
return;
}
if (messageText) {
// If we receive a text message, check to see if it matches any special
// keywords and send back the corresponding example. Otherwise, just echo
// the text we received.
switch (messageText) {
case 'image':
sendImageMessage(senderID);
break;
case 'gif':
sendGifMessage(senderID);
break;
case 'audio':
sendAudioMessage(senderID);
break;
case 'video':
sendVideoMessage(senderID);
break;
case 'file':
sendFileMessage(senderID);
break;
case 'button':
sendButtonMessage(senderID);
break;
case 'generic':
sendGenericMessage(senderID);
break;
case 'receipt':
sendReceiptMessage(senderID);
break;
case 'quick reply':
sendQuickReply(senderID);
break;
case 'read receipt':
sendReadReceipt(senderID);
break;
case 'typing on':
sendTypingOn(senderID);
break;
case 'typing off':
sendTypingOff(senderID);
break;
case 'account linking':
sendAccountLinking(senderID);
break;
default:
sendTextMessage(senderID, messageText);
}
} else if (messageAttachments) {
sendTextMessage(senderID, "Message with attachment received");
}
}
/*
* Delivery Confirmation Event
*
* This event is sent to confirm the delivery of a message. Read more about
* these fields at https://developers.facebook.com/docs/messenger-platform/webhook-reference/message-delivered
*
*/
function receivedDeliveryConfirmation(event) {
var senderID = event.sender.id;
var recipientID = event.recipient.id;
var delivery = event.delivery;
var messageIDs = delivery.mids;
var watermark = delivery.watermark;
var sequenceNumber = delivery.seq;
if (messageIDs) {
messageIDs.forEach(function(messageID) {
console.log("Received delivery confirmation for message ID: %s",
messageID);
});
}
console.log("All message before %d were delivered.", watermark);
}
/*
* Postback Event
*
* This event is called when a postback is tapped on a Structured Message.
* https://developers.facebook.com/docs/messenger-platform/webhook-reference/postback-received
*
*/
function receivedPostback(event) {
var senderID = event.sender.id;
var recipientID = event.recipient.id;
var timeOfPostback = event.timestamp;
// The 'payload' param is a developer-defined field which is set in a postback
// button for Structured Messages.
var payload = event.postback.payload;
console.log("Received postback for user %d and page %d with payload '%s' " +
"at %d", senderID, recipientID, payload, timeOfPostback);
// When a postback is called, we'll send a message back to the sender to
// let them know it was successful
sendTextMessage(senderID, "Postback called");
}
/*
* Message Read Event
*
* This event is called when a previously-sent message has been read.
* https://developers.facebook.com/docs/messenger-platform/webhook-reference/message-read
*
*/
function receivedMessageRead(event) {
var senderID = event.sender.id;
var recipientID = event.recipient.id;
// All messages before watermark (a timestamp) or sequence have been seen.
var watermark = event.read.watermark;
var sequenceNumber = event.read.seq;
console.log("Received message read event for watermark %d and sequence " +
"number %d", watermark, sequenceNumber);
}
/*
* Account Link Event
*
* This event is called when the Link Account or UnLink Account action has been
* tapped.
* https://developers.facebook.com/docs/messenger-platform/webhook-reference/account-linking
*
*/
function receivedAccountLink(event) {
var senderID = event.sender.id;
var recipientID = event.recipient.id;
var status = event.account_linking.status;
var authCode = event.account_linking.authorization_code;
console.log("Received account link event with for user %d with status %s " +
"and auth code %s ", senderID, status, authCode);
}
/*
* Send an image using the Send API.
*
*/
function sendImageMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "image",
payload: {
url: SERVER_URL + "/assets/rift.png"
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a Gif using the Send API.
*
*/
function sendGifMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "image",
payload: {
url: SERVER_URL + "/assets/instagram_logo.gif"
}
}
}
};
callSendAPI(messageData);
}
/*
* Send audio using the Send API.
*
*/
function sendAudioMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "audio",
payload: {
url: SERVER_URL + "/assets/sample.mp3"
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a video using the Send API.
*
*/
function sendVideoMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "video",
payload: {
url: SERVER_URL + "/assets/allofus480.mov"
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a file using the Send API.
*
*/
function sendFileMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "file",
payload: {
url: SERVER_URL + "/assets/test.txt"
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a text message using the Send API.
*
*/
function sendTextMessage(recipientId, messageText) {
var messageData = {
recipient: {
id: recipientId
},
message: {
text: "{The data fed from CasperJS}",
metadata: "DEVELOPER_DEFINED_METADATA"
}
};
callSendAPI(messageData);
}
/*
* Send a button message using the Send API.
*
*/
function sendButtonMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "template",
payload: {
template_type: "button",
text: "This is test text",
buttons:[{
type: "web_url",
url: "https://www.oculus.com/en-us/rift/",
title: "Open Web URL"
}, {
type: "postback",
title: "Trigger Postback",
payload: "DEVELOPER_DEFINED_PAYLOAD"
}, {
type: "phone_number",
title: "Call Phone Number",
payload: "+16505551234"
}]
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a Structured Message (Generic Message type) using the Send API.
*
*/
function sendGenericMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "template",
payload: {
template_type: "generic",
elements: [{
title: "rift",
subtitle: "Next-generation virtual reality",
item_url: "https://www.oculus.com/en-us/rift/",
image_url: SERVER_URL + "/assets/rift.png",
buttons: [{
type: "web_url",
url: "https://www.oculus.com/en-us/rift/",
title: "Open Web URL"
}, {
type: "postback",
title: "Call Postback",
payload: "Payload for first bubble",
}],
}, {
title: "touch",
subtitle: "Your Hands, Now in VR",
item_url: "https://www.oculus.com/en-us/touch/",
image_url: SERVER_URL + "/assets/touch.png",
buttons: [{
type: "web_url",
url: "https://www.oculus.com/en-us/touch/",
title: "Open Web URL"
}, {
type: "postback",
title: "Call Postback",
payload: "Payload for second bubble",
}]
}]
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a receipt message using the Send API.
*
*/
function sendReceiptMessage(recipientId) {
// Generate a random receipt ID as the API requires a unique ID
var receiptId = "order" + Math.floor(Math.random()*1000);
var messageData = {
recipient: {
id: recipientId
},
message:{
attachment: {
type: "template",
payload: {
template_type: "receipt",
recipient_name: "Peter Chang",
order_number: receiptId,
currency: "USD",
payment_method: "Visa 1234",
timestamp: "1428444852",
elements: [{
title: "Oculus Rift",
subtitle: "Includes: headset, sensor, remote",
quantity: 1,
price: 599.00,
currency: "USD",
image_url: SERVER_URL + "/assets/riftsq.png"
}, {
title: "Samsung Gear VR",
subtitle: "Frost White",
quantity: 1,
price: 99.99,
currency: "USD",
image_url: SERVER_URL + "/assets/gearvrsq.png"
}],
address: {
street_1: "1 Hacker Way",
street_2: "",
city: "Menlo Park",
postal_code: "94025",
state: "CA",
country: "US"
},
summary: {
subtotal: 698.99,
shipping_cost: 20.00,
total_tax: 57.67,
total_cost: 626.66
},
adjustments: [{
name: "New Customer Discount",
amount: -50
}, {
name: "0 Off Coupon",
amount: -100
}]
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a message with Quick Reply buttons.
*
*/
function sendQuickReply(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
text: "What's your favorite movie genre?",
quick_replies: [
{
"content_type":"text",
"title":"Action",
"payload":"DEVELOPER_DEFINED_PAYLOAD_FOR_PICKING_ACTION"
},
{
"content_type":"text",
"title":"Comedy",
"payload":"DEVELOPER_DEFINED_PAYLOAD_FOR_PICKING_COMEDY"
},
{
"content_type":"text",
"title":"Drama",
"payload":"DEVELOPER_DEFINED_PAYLOAD_FOR_PICKING_DRAMA"
}
]
}
};
callSendAPI(messageData);
}
/*
* Send a read receipt to indicate the message has been read
*
*/
function sendReadReceipt(recipientId) {
console.log("Sending a read receipt to mark message as seen");
var messageData = {
recipient: {
id: recipientId
},
sender_action: "mark_seen"
};
callSendAPI(messageData);
}
/*
* Turn typing indicator on
*
*/
function sendTypingOn(recipientId) {
console.log("Turning typing indicator on");
var messageData = {
recipient: {
id: recipientId
},
sender_action: "typing_on"
};
callSendAPI(messageData);
}
/*
* Turn typing indicator off
*
*/
function sendTypingOff(recipientId) {
console.log("Turning typing indicator off");
var messageData = {
recipient: {
id: recipientId
},
sender_action: "typing_off"
};
callSendAPI(messageData);
}
/*
* Send a message with the account linking call-to-action
*
*/
function sendAccountLinking(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "template",
payload: {
template_type: "button",
text: "Welcome. Link your account.",
buttons:[{
type: "account_link",
url: SERVER_URL + "/authorize"
}]
}
}
}
};
callSendAPI(messageData);
}
/*
* Call the Send API. The message data goes in the body. If successful, we'll
* get the message id in a response
*
*/
function callSendAPI(messageData) {
request({
uri: 'https://graph.facebook.com/v2.6/me/messages',
qs: { access_token: PAGE_ACCESS_TOKEN },
method: 'POST',
json: messageData
}, function (error, response, body) {
if (!error && response.statusCode == 200) {
var recipientId = body.recipient_id;
var messageId = body.message_id;
if (messageId) {
console.log("Successfully sent message with id %s to recipient %s",
messageId, recipientId);
} else {
console.log("Successfully called Send API for recipient %s",
recipientId);
}
} else {
console.error("Failed calling Send API", response.statusCode, response.statusMessage, body.error);
}
});
}
// Start server
// Webhooks must be available via SSL with a certificate signed by a valid
// certificate authority.
app.listen(app.get('port'), function() {
console.log('Node app is running on port', app.get('port'));
});
module.exports = app;
接受参数并处理它的CasperJS脚本（echo.js）：
var casper = require("casper").create();
if(casper.cli.has(0)) {
casper.echo("Received " + casper.cli.get(0));
}
casper.exit();
我现在使用下面的命令来执行它：
casperjs echo.js input
将回复：
Received input
我想将此 "Received input" 内容回复给 Facebook 用户。我怎样才能做到这一点？如何连接这些组件？
谢谢。
您可以 运行 您的 casper 在某种异步任务中工作 (like a promise) or in a background job.
您可以将发件人的 ID 和文本或您正在处理的任何内容（无法从您的源代码中得知）发送到后台作业或任务，并在作业中用您的 Messenger 客户端响应已处理、已抓取的内容数据.
为了更好的用户体验，在您使用处理后的数据进行响应之前说 "Hey user, I'm scraping some stuff, it'll just be a second" 可能也不错。
A typing_on message 在这里也不错，但是 YMMV。
我跟着FB的tutorial做了一个FB聊天机器人。 Webhook 已成功创建，我现在想继续捕获 Facebook 用户的输入（发送到我的页面的消息），并将其用作我的 CasperJS 脚本的输入。最后，我想使用 CasperJS 脚本的输出并回复 Facebook 用户。
app.js在Facebook Messenger Bot中使用（基本上和例子给出的一样，只是改变了sendTextMessage(recipientId, messageText)函数：
/*
* Copyright 2016-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the license found in the
* LICENSE file in the root directory of this source tree.
*
*/
/* jshint node: true, devel: true */
'use strict';
const
bodyParser = require('body-parser'),
config = require('config'),
crypto = require('crypto'),
express = require('express'),
https = require('https'),
request = require('request');
var app = express();
app.set('port', process.env.PORT || 5000);
app.set('view engine', 'ejs');
app.use(bodyParser.json({ verify: verifyRequestSignature }));
app.use(express.static('public'));
/*
* Be sure to setup your config values before running this code. You can
* set them using environment variables or modifying the config file in /config.
*
*/
// App Secret can be retrieved from the App Dashboard
const APP_SECRET = (process.env.MESSENGER_APP_SECRET) ?
process.env.MESSENGER_APP_SECRET :
config.get('appSecret');
// Arbitrary value used to validate a webhook
const VALIDATION_TOKEN = (process.env.MESSENGER_VALIDATION_TOKEN) ?
(process.env.MESSENGER_VALIDATION_TOKEN) :
config.get('validationToken');
// Generate a page access token for your page from the App Dashboard
const PAGE_ACCESS_TOKEN = (process.env.MESSENGER_PAGE_ACCESS_TOKEN) ?
(process.env.MESSENGER_PAGE_ACCESS_TOKEN) :
config.get('pageAccessToken');
// URL where the app is running (include protocol). Used to point to scripts and
// assets located at this address.
const SERVER_URL = (process.env.SERVER_URL) ?
(process.env.SERVER_URL) :
config.get('serverURL');
if (!(APP_SECRET && VALIDATION_TOKEN && PAGE_ACCESS_TOKEN && SERVER_URL)) {
console.error("Missing config values");
process.exit(1);
}
/*
* Use your own validation token. Check that the token used in the Webhook
* setup is the same token used here.
*
*/
app.get('/webhook', function(req, res) {
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." + VALIDATION_TOKEN + ", " + req.query['hub.verify_token']);
res.sendStatus(403);
}
});
/*
* All callbacks for Messenger are POST-ed. They will be sent to the same
* webhook. Be sure to subscribe your app to your page to receive callbacks
* for your page.
* https://developers.facebook.com/docs/messenger-platform/product-overview/setup#subscribe_app
*
*/
app.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.
res.sendStatus(200);
}
});
/*
* This path is used for account linking. The account linking call-to-action
* (sendAccountLinking) is pointed to this URL.
*
*/
app.get('/authorize', function(req, res) {
var accountLinkingToken = req.query.account_linking_token;
var redirectURI = req.query.redirect_uri;
// Authorization Code should be generated per user by the developer. This will
// be passed to the Account Linking callback.
var authCode = "1234567890";
// Redirect users to this URI on successful login
var redirectURISuccess = redirectURI + "&authorization_code=" + authCode;
res.render('authorize', {
accountLinkingToken: accountLinkingToken,
redirectURI: redirectURI,
redirectURISuccess: redirectURISuccess
});
});
/*
* Verify that the callback came from Facebook. Using the App Secret from
* the App Dashboard, we can verify the signature that is sent with each
* callback in the x-hub-signature field, located in the header.
*
* https://developers.facebook.com/docs/graph-api/webhooks#setup
*
*/
function verifyRequestSignature(req, res, buf) {
var signature = req.headers["x-hub-signature"];
if (!signature) {
// For testing, let's log an error. In production, you should throw an
// error.
console.error("Couldn't validate the signature.");
} else {
var elements = signature.split('=');
var method = elements[0];
var signatureHash = elements[1];
var expectedHash = crypto.createHmac('sha1', APP_SECRET)
.update(buf)
.digest('hex');
if (signatureHash != expectedHash) {
throw new Error("Couldn't validate the request signature.");
}
}
}
/*
* Authorization Event
*
* The value for 'optin.ref' is defined in the entry point. For the "Send to
* Messenger" plugin, it is the 'data-ref' field. Read more at
* https://developers.facebook.com/docs/messenger-platform/webhook-reference/authentication
*
*/
function receivedAuthentication(event) {
var senderID = event.sender.id;
var recipientID = event.recipient.id;
var timeOfAuth = event.timestamp;
// The 'ref' field is set in the 'Send to Messenger' plugin, in the 'data-ref'
// The developer can set this to an arbitrary value to associate the
// authentication callback with the 'Send to Messenger' click event. This is
// a way to do account linking when the user clicks the 'Send to Messenger'
// plugin.
var passThroughParam = event.optin.ref;
console.log("Received authentication for user %d and page %d with pass " +
"through param '%s' at %d", senderID, recipientID, passThroughParam,
timeOfAuth);
// When an authentication is received, we'll send a message back to the sender
// to let them know it was successful.
sendTextMessage(senderID, "Authentication successful");
}
/*
* Message Event
*
* This event is called when a message is sent to your page. The 'message'
* object format can vary depending on the kind of message that was received.
* Read more at https://developers.facebook.com/docs/messenger-platform/webhook-reference/message-received
*
* For this example, we're going to echo any text that we get. If we get some
* special keywords ('button', 'generic', 'receipt'), then we'll send back
* examples of those bubbles to illustrate the special message bubbles we've
* created. If we receive a message with an attachment (image, video, audio),
* then we'll simply confirm that we've received the attachment.
*
*/
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 isEcho = message.is_echo;
var messageId = message.mid;
var appId = message.app_id;
var metadata = message.metadata;
// You may get a text or attachment but not both
var messageText = message.text;
var messageAttachments = message.attachments;
var quickReply = message.quick_reply;
if (isEcho) {
// Just logging message echoes to console
console.log("Received echo for message %s and app %d with metadata %s",
messageId, appId, metadata);
return;
} else if (quickReply) {
var quickReplyPayload = quickReply.payload;
console.log("Quick reply for message %s with payload %s",
messageId, quickReplyPayload);
sendTextMessage(senderID, "Quick reply tapped");
return;
}
if (messageText) {
// If we receive a text message, check to see if it matches any special
// keywords and send back the corresponding example. Otherwise, just echo
// the text we received.
switch (messageText) {
case 'image':
sendImageMessage(senderID);
break;
case 'gif':
sendGifMessage(senderID);
break;
case 'audio':
sendAudioMessage(senderID);
break;
case 'video':
sendVideoMessage(senderID);
break;
case 'file':
sendFileMessage(senderID);
break;
case 'button':
sendButtonMessage(senderID);
break;
case 'generic':
sendGenericMessage(senderID);
break;
case 'receipt':
sendReceiptMessage(senderID);
break;
case 'quick reply':
sendQuickReply(senderID);
break;
case 'read receipt':
sendReadReceipt(senderID);
break;
case 'typing on':
sendTypingOn(senderID);
break;
case 'typing off':
sendTypingOff(senderID);
break;
case 'account linking':
sendAccountLinking(senderID);
break;
default:
sendTextMessage(senderID, messageText);
}
} else if (messageAttachments) {
sendTextMessage(senderID, "Message with attachment received");
}
}
/*
* Delivery Confirmation Event
*
* This event is sent to confirm the delivery of a message. Read more about
* these fields at https://developers.facebook.com/docs/messenger-platform/webhook-reference/message-delivered
*
*/
function receivedDeliveryConfirmation(event) {
var senderID = event.sender.id;
var recipientID = event.recipient.id;
var delivery = event.delivery;
var messageIDs = delivery.mids;
var watermark = delivery.watermark;
var sequenceNumber = delivery.seq;
if (messageIDs) {
messageIDs.forEach(function(messageID) {
console.log("Received delivery confirmation for message ID: %s",
messageID);
});
}
console.log("All message before %d were delivered.", watermark);
}
/*
* Postback Event
*
* This event is called when a postback is tapped on a Structured Message.
* https://developers.facebook.com/docs/messenger-platform/webhook-reference/postback-received
*
*/
function receivedPostback(event) {
var senderID = event.sender.id;
var recipientID = event.recipient.id;
var timeOfPostback = event.timestamp;
// The 'payload' param is a developer-defined field which is set in a postback
// button for Structured Messages.
var payload = event.postback.payload;
console.log("Received postback for user %d and page %d with payload '%s' " +
"at %d", senderID, recipientID, payload, timeOfPostback);
// When a postback is called, we'll send a message back to the sender to
// let them know it was successful
sendTextMessage(senderID, "Postback called");
}
/*
* Message Read Event
*
* This event is called when a previously-sent message has been read.
* https://developers.facebook.com/docs/messenger-platform/webhook-reference/message-read
*
*/
function receivedMessageRead(event) {
var senderID = event.sender.id;
var recipientID = event.recipient.id;
// All messages before watermark (a timestamp) or sequence have been seen.
var watermark = event.read.watermark;
var sequenceNumber = event.read.seq;
console.log("Received message read event for watermark %d and sequence " +
"number %d", watermark, sequenceNumber);
}
/*
* Account Link Event
*
* This event is called when the Link Account or UnLink Account action has been
* tapped.
* https://developers.facebook.com/docs/messenger-platform/webhook-reference/account-linking
*
*/
function receivedAccountLink(event) {
var senderID = event.sender.id;
var recipientID = event.recipient.id;
var status = event.account_linking.status;
var authCode = event.account_linking.authorization_code;
console.log("Received account link event with for user %d with status %s " +
"and auth code %s ", senderID, status, authCode);
}
/*
* Send an image using the Send API.
*
*/
function sendImageMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "image",
payload: {
url: SERVER_URL + "/assets/rift.png"
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a Gif using the Send API.
*
*/
function sendGifMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "image",
payload: {
url: SERVER_URL + "/assets/instagram_logo.gif"
}
}
}
};
callSendAPI(messageData);
}
/*
* Send audio using the Send API.
*
*/
function sendAudioMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "audio",
payload: {
url: SERVER_URL + "/assets/sample.mp3"
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a video using the Send API.
*
*/
function sendVideoMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "video",
payload: {
url: SERVER_URL + "/assets/allofus480.mov"
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a file using the Send API.
*
*/
function sendFileMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "file",
payload: {
url: SERVER_URL + "/assets/test.txt"
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a text message using the Send API.
*
*/
function sendTextMessage(recipientId, messageText) {
var messageData = {
recipient: {
id: recipientId
},
message: {
text: "{The data fed from CasperJS}",
metadata: "DEVELOPER_DEFINED_METADATA"
}
};
callSendAPI(messageData);
}
/*
* Send a button message using the Send API.
*
*/
function sendButtonMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "template",
payload: {
template_type: "button",
text: "This is test text",
buttons:[{
type: "web_url",
url: "https://www.oculus.com/en-us/rift/",
title: "Open Web URL"
}, {
type: "postback",
title: "Trigger Postback",
payload: "DEVELOPER_DEFINED_PAYLOAD"
}, {
type: "phone_number",
title: "Call Phone Number",
payload: "+16505551234"
}]
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a Structured Message (Generic Message type) using the Send API.
*
*/
function sendGenericMessage(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "template",
payload: {
template_type: "generic",
elements: [{
title: "rift",
subtitle: "Next-generation virtual reality",
item_url: "https://www.oculus.com/en-us/rift/",
image_url: SERVER_URL + "/assets/rift.png",
buttons: [{
type: "web_url",
url: "https://www.oculus.com/en-us/rift/",
title: "Open Web URL"
}, {
type: "postback",
title: "Call Postback",
payload: "Payload for first bubble",
}],
}, {
title: "touch",
subtitle: "Your Hands, Now in VR",
item_url: "https://www.oculus.com/en-us/touch/",
image_url: SERVER_URL + "/assets/touch.png",
buttons: [{
type: "web_url",
url: "https://www.oculus.com/en-us/touch/",
title: "Open Web URL"
}, {
type: "postback",
title: "Call Postback",
payload: "Payload for second bubble",
}]
}]
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a receipt message using the Send API.
*
*/
function sendReceiptMessage(recipientId) {
// Generate a random receipt ID as the API requires a unique ID
var receiptId = "order" + Math.floor(Math.random()*1000);
var messageData = {
recipient: {
id: recipientId
},
message:{
attachment: {
type: "template",
payload: {
template_type: "receipt",
recipient_name: "Peter Chang",
order_number: receiptId,
currency: "USD",
payment_method: "Visa 1234",
timestamp: "1428444852",
elements: [{
title: "Oculus Rift",
subtitle: "Includes: headset, sensor, remote",
quantity: 1,
price: 599.00,
currency: "USD",
image_url: SERVER_URL + "/assets/riftsq.png"
}, {
title: "Samsung Gear VR",
subtitle: "Frost White",
quantity: 1,
price: 99.99,
currency: "USD",
image_url: SERVER_URL + "/assets/gearvrsq.png"
}],
address: {
street_1: "1 Hacker Way",
street_2: "",
city: "Menlo Park",
postal_code: "94025",
state: "CA",
country: "US"
},
summary: {
subtotal: 698.99,
shipping_cost: 20.00,
total_tax: 57.67,
total_cost: 626.66
},
adjustments: [{
name: "New Customer Discount",
amount: -50
}, {
name: "0 Off Coupon",
amount: -100
}]
}
}
}
};
callSendAPI(messageData);
}
/*
* Send a message with Quick Reply buttons.
*
*/
function sendQuickReply(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
text: "What's your favorite movie genre?",
quick_replies: [
{
"content_type":"text",
"title":"Action",
"payload":"DEVELOPER_DEFINED_PAYLOAD_FOR_PICKING_ACTION"
},
{
"content_type":"text",
"title":"Comedy",
"payload":"DEVELOPER_DEFINED_PAYLOAD_FOR_PICKING_COMEDY"
},
{
"content_type":"text",
"title":"Drama",
"payload":"DEVELOPER_DEFINED_PAYLOAD_FOR_PICKING_DRAMA"
}
]
}
};
callSendAPI(messageData);
}
/*
* Send a read receipt to indicate the message has been read
*
*/
function sendReadReceipt(recipientId) {
console.log("Sending a read receipt to mark message as seen");
var messageData = {
recipient: {
id: recipientId
},
sender_action: "mark_seen"
};
callSendAPI(messageData);
}
/*
* Turn typing indicator on
*
*/
function sendTypingOn(recipientId) {
console.log("Turning typing indicator on");
var messageData = {
recipient: {
id: recipientId
},
sender_action: "typing_on"
};
callSendAPI(messageData);
}
/*
* Turn typing indicator off
*
*/
function sendTypingOff(recipientId) {
console.log("Turning typing indicator off");
var messageData = {
recipient: {
id: recipientId
},
sender_action: "typing_off"
};
callSendAPI(messageData);
}
/*
* Send a message with the account linking call-to-action
*
*/
function sendAccountLinking(recipientId) {
var messageData = {
recipient: {
id: recipientId
},
message: {
attachment: {
type: "template",
payload: {
template_type: "button",
text: "Welcome. Link your account.",
buttons:[{
type: "account_link",
url: SERVER_URL + "/authorize"
}]
}
}
}
};
callSendAPI(messageData);
}
/*
* Call the Send API. The message data goes in the body. If successful, we'll
* get the message id in a response
*
*/
function callSendAPI(messageData) {
request({
uri: 'https://graph.facebook.com/v2.6/me/messages',
qs: { access_token: PAGE_ACCESS_TOKEN },
method: 'POST',
json: messageData
}, function (error, response, body) {
if (!error && response.statusCode == 200) {
var recipientId = body.recipient_id;
var messageId = body.message_id;
if (messageId) {
console.log("Successfully sent message with id %s to recipient %s",
messageId, recipientId);
} else {
console.log("Successfully called Send API for recipient %s",
recipientId);
}
} else {
console.error("Failed calling Send API", response.statusCode, response.statusMessage, body.error);
}
});
}
// Start server
// Webhooks must be available via SSL with a certificate signed by a valid
// certificate authority.
app.listen(app.get('port'), function() {
console.log('Node app is running on port', app.get('port'));
});
module.exports = app;
接受参数并处理它的CasperJS脚本（echo.js）：
var casper = require("casper").create();
if(casper.cli.has(0)) {
casper.echo("Received " + casper.cli.get(0));
}
casper.exit();
我现在使用下面的命令来执行它：
casperjs echo.js input
将回复：
Received input
我想将此 "Received input" 内容回复给 Facebook 用户。我怎样才能做到这一点？如何连接这些组件？
谢谢。
您可以 运行 您的 casper 在某种异步任务中工作 (like a promise) or in a background job.
您可以将发件人的 ID 和文本或您正在处理的任何内容（无法从您的源代码中得知）发送到后台作业或任务，并在作业中用您的 Messenger 客户端响应已处理、已抓取的内容数据.
为了更好的用户体验，在您使用处理后的数据进行响应之前说 "Hey user, I'm scraping some stuff, it'll just be a second" 可能也不错。
A typing_on message 在这里也不错，但是 YMMV。