[英]AWS Lambda Function Executing Multiple Times (Serverless)
I'm in the process of creating a facebook messenger bot using AWS Lambda and the Serverless framework. 我正在使用AWS Lambda和无服务器框架创建facebook messenger机器人。 For now I just want it to repeat whatever is sent right back to the user.
现在我只想让它重复发送给用户的任何内容。 Here is the code:
这是代码:
'use strict';
var https = require('https');
const axios = require('axios');
var VERIFY_TOKEN = "VERIFY";
var PAGE_ACCESS_TOKEN = "TOKEN";
module.exports.hello = (event, context, callback) => {
const response = {
statusCode: 200,
body: JSON.stringify({
message: 'Go Serverless v1.0! Your function executed successfully!',
input: event,
}),
};
callback(null, response);
// Use this code if you don't use the http event with the LAMBDA-PROXY integration
// callback(null, { message: 'Go Serverless v1.0! Your function executed successfully!', event });
};
// Receive user messages
module.exports.botReply = (event, context, callback) => {
var data = JSON.parse(event.body);
console.log("BOT REPLY")
// 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(msg) {
if (msg.message) {
console.log("received message");
const payload = {
recipient: {
id: msg.sender.id
},
message: {
text: "test"
}
};
const url = "https://graph.facebook.com/v2.6/me/messages?access_token=" + PAGE_ACCESS_TOKEN;
axios.post(url, payload).then((response) => callback(null, response));
} else {
console.log("Webhook received unknown event: ", event);
var response = {
'body': "ok",
'statusCode': 200
};
callback(null, response);
}
});
});
}
}
So the bot does successfully echo back the messages, but in my logs I can see it getting executed multiple times. 因此机器人成功回显消息,但在我的日志中,我可以看到它被多次执行。 Sometimes the message has no "message" key in the JSON for some reason, so the multiple executions have different outcomes.
有时,由于某种原因,消息在JSON中没有“消息”键,因此多次执行会产生不同的结果。 I believe it has something to do with me sending the message back to the user because when I comment out the axios.post, the problem stops.
我认为这与我将消息发送回用户有关,因为当我注释掉axios.post时,问题就会停止。 Any idea why this is happening?
知道为什么会这样吗?
@Asanka figured it out in the comments. @Asanka在评论中发现了这一点。 Basically, facebook was sending multiple events over that I had not accounted for in my code.
基本上,Facebook发送了多个事件,而我的代码中没有考虑到这些事件。 Stuff like "message delivered" and "message read" were also events I didn't know about.
像“传递信息”和“阅读信息”这样的东西也是我不知道的事件。 I just had to unsubscribe to them in the developer console.
我只需要在开发者控制台中取消订阅它们。
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