facebook Messenger bot上的res.send(200)问题 [英] res.send(200) issue on facebook messenger bot

问题描述

我正在尝试使用nodejs构建一个Facebook Messenger机器人.我开发了具有核心功能的机器人.在测试时 如果用户发送了GIF或不干胶标签，那么它必须回答我无法理解你.抱歉".它确实发送 该消息，但它挂起并此后每隔几分钟继续发送该消息.我注意到ngrok服务器抛出了500 HTTP POST请求的内部服务器错误.在进一步调试中，我发现res.send(200)没有正确执行. 我在res.send(200)之后拥有的console.log stmt从未被打印过.不知道我可能会缺少什么.任何帮助表示赞赏.尝试重新启动服务器，并使用新的ngork https链接重新订阅了该应用程序.相同的消息继续被打印出:(.

I am trying to build a facebook messenger bot using nodejs. I got the bot developed with core features. While testing for a negative scenario where the user sends in a GIF or sticker, it has to respond "I couldn't get you. Sorry". It does send that message but it hangs and keeps sending that message thereafter every few minutes. I noticed that the ngrok server threw an 500 HTTP Internal Server Error for the POST request. On further debugging, I was able to find out that res.send(200) is not getting executed properly. The console.log stmt that I have after res.send(200) never gets printed. Not sure what I may be missing. Any help is appreciated. Tried restarting the server and resubscribed to the app with a new ngork https link. The same message continues to get printed out :(.

这是我的代码.

    server.post('/', (req, res, next) => {
            // Extract the body of the POST request
            let data = req.body;
            let incomingMessage = '';
            if(data.object === 'page') {
                data.entry.forEach(pageObj => {
                    // Iterate through the messaging Array
                    pageObj.messaging.forEach(msgEvent => {
                         incomingMessage = {
                            sender: msgEvent.sender.id,
                            timeOfMessage: msgEvent.timestamp,
                            message: msgEvent.message
                        }
                    });
                });
            }
            const {
                message,
                sender
            } = incomingMessage

            if(message.text) {
                f.txt(sender, 'Hi there!!!');
            } else {
                f.txt(sender, `I couldn't get you. Sorry :(`);
                //res.send(200);
            }
        res.send(200);
        console.log('We are at the end of post');
        return next();
    });

推荐答案

也许这个答案不能解决您的问题，但可能会有所帮助. 如果要发送200个HTTP代码，请改用此代码:

Maybe this answer doesn't resolve your problem but it can be helpful. If you want to send a 200 HTTP code use this instead:

res.sendStatus(200); // equivalent to res.status(200).send('OK')

另一方面，如果这不是中间件，则可以删除return next();行.

On the other hand, if this is not a middleware, you can remove the return next(); line.

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