我正在尝试调用外部API，但每次我发出https或任何类型的请求时，我的机器人都会被冻结。
我尝试使用不同的GET方法制作API，但每当我尝试进行API调用时它就会卡住。
[在此处输入图像说明] [1]
进行API调用的代码位于函数==＆gt; 'function sendTextMessage（recipientId，messageText）'
'use strict';
const express = require('express');
const bodyParser = require('body-parser');
const request = require('request');
const path = require('path');
var Bot = require('messenger-bot')
const http = require('http');
const url = require('url');
//Natural language processing Library
var natural = require('natural');
//Chekc stocks
var checkStocks = false;
// The rest of the code implements the routes for our Express server.
let app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
extended: true
}));
// Webhook validation
app.get('/webhook', function(req, res) {
if (req.query['hub.mode'] === 'subscribe' &&
req.query['hub.verify_token'] === process.env.VERIFY_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);
}
});
// Display the web page
app.get('/', function(req, res) {
res.writeHead(200, {'Content-Type': 'text/html'});
res.write(messengerButton);
res.end();
});
// Message processing
app.post('/webhook', function (req, res) {
console.log(req.body);
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(entry) {
var pageID = entry.id;
var timeOfEvent = entry.time;
// Iterate over each messaging event
entry.messaging.forEach(function(event) {
if (event.message) {
receivedMessage(event);
} else if (event.postback) {
receivedPostback(event);
} else {
console.log("Webhook received unknown event: ", event);
}
});
});
// 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);
}
});
//HttpClient to make Request to api's
// Incoming events handling
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 template 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");
}
}
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");
}
//////////////////////////
// Sending helpers
//////////////////////////
function sendTextMessage(recipientId, messageText) {
// messageText.strip();
// messageText.lowercase();
var reply = messageText.toLowerCase();
//Kunal's Code
if (reply == 'hey') {
messageText = 'Hello, welcome to the future';
}
else if(reply =='GET_STARTED_PAYLOAD'){
messageText = 'I am Charles, your personal assistant, you can ask me about investment options.'
}
else if(reply =='check stocks')
{
messageText = "Can you please tell me the stock symbol for the stock you want to check?";
checkStocks = true;
}
else if(checkStocks)
{
console.log("stocks");
var url = 'https://www.alphavantage.co/query?function=TIME_SERIES_INTRADAY&symbol=AAPL&interval=1min&apikey=I0VJYEWD3R37FUFTXU';
var request = http.get(url, function(response) {
//console.log(response.statusCode
messageText = response.statusCode;
//You need to implement 'data' for the 'end' to get triggered eventually.
});
}
else{
messageText="I didn't get you, can you please repeat?"
}
// var invalid = 0;
// if ((messageText.indexOf('Hi')>-1)||(messageText.indexOf('Hello')>-1)||(messageText.indexOf('Hey')>-1)||(messageText.indexOf('Howdy')>-1)) {
// messageText = 'Hello, welcome to the future';
// invalid = 1;
// }
// if ((messageText.indexOf('How')>-1)&&(messageText.indexOf('you')>-1)) {
// messageText = 'I am doing well, thank you! How are you?';
// invalid = 1;
// }
// if ((messageText.indexOf('Who')>-1)&&(messageText.indexOf('you')>-1)) {
// messageText = 'I am Charles, your personal assistant, you can ask me about time';
// invalid = 1;
// }
// if ((messageText.indexOf('How')>-1)&&(messageText.indexOf('going')>-1)) {
// messageText = 'It is going really well, thank you! What about yourself?';
// invalid = 1;
// }
// if ((messageText.indexOf('What')>-1)&&(messageText.indexOf('your')>-1)&&(messageText.indexOf('name')>-1)) {
// messageText = 'I am Charles, your personal assistant, you can ask me about time';
// invalid = 1;
// }
// if ((messageText.indexOf('What')>-1)&&(messageText.indexOf('time')>-1)) {
// messageText = 'It is time for you to get a watch';
// invalid = 1;
// }
// if (invalid == 0) {
// messageText = 'Very well'
// invalid = 0;
// }
var messageData = {
recipient: {
id: recipientId
},
message: {
text: messageText
}
};
callSendAPI(messageData);
}
//Following function can be used for the stock links we wish to implement
//Right now if you type 'generic' it spits out a few buttons and URL to Oculus Rift
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: "http://messengerdemo.parseapp.com/img/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: "http://messengerdemo.parseapp.com/img/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);
}
function callSendAPI(messageData) {
request({
uri: 'https://graph.facebook.com/v2.6/me/messages',
qs: { access_token: process.env.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;
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);
}
});
var url = 'http://graph.facebook.com/517267866/?fields=picture';
http.get(url, function(res){
var body = '';
res.on('data', function(chunk){
body += chunk;
});
res.on('end', function(){
var fbResponse = JSON.parse(body);
console.log("Got a response: ", fbResponse.picture);
});
}).on('error', function(e){
console.log("Got an error: ", e);
});
}
function stocksSendAPI()
{
}
// Set Express to listen out for HTTP requests
var server = app.listen(process.env.PORT || 3000, function () {
console.log("Listening on port %s", server.address().port);
});
答案 0 :(得分：2)
错误出现在代码的这一部分：
var request = http.get(url, function(response) {
messageText = response.statusCode;
});
function(response {...}是一个异步调用，这意味着它会在API返回响应时运行，而不是在前一行之后立即运行。这意味着当你到达
callSendAPI(messageData);
变量messageData未必已启动，因此它不会像您希望的那样运行。为避免这种情况，您需要在知道messageData已初始化后通过将其移至此处来调用该函数：
var request = http.get(url, function(response) {
messageText = response.statusCode;
//Initialise the messageData object here
callSendAPI(messageData);
});
另一个提示：如果这是您在网址中的真实API密钥，则应将其从此帖子中删除，并在代码中删除use it in an environment variable，特别是如果您正在使用Git或其他内容非本地存储。