背景

我们正在开发一个Slack Bot。这次我们使用了由Slack、React、Next.js和ngrok提供的Bolt for JavaScript（Node.js）。下面是它们各自的功能。

• 用于JavaScript的螺栓：我不想使用Slack的基本API，但想从 Package 它的函数中获益。
• React：需要使用Next.js
• Next. js：Slack需要一个请求URL，以便在Slack中发生诸如提及之类的事件时通知我的bot应用，但Next.js可以轻松创建一个API端点来设置该URL（例如/api/something）
• ngrok：在本地开发环境中，该URL将是http://localhost:3000，因此协议将是http而不是https。Slack不允许这样做，因此我们需要一个以https开头的URL，该URL将通过隧道连接到本地http://localhost:3000。

待解决的问题。

我已经确认，如果我在Slack的某个工作区中键入@xxxx，事件将通知给https://xxxx.jp.ngrok.io/api/slack/events。

app.event("app_mention", async ({ event, say }) => {
  .
  .
  .
}

未调用，并发生以下错误

error - unhandledRejection: Error: listen EADDRINUSE: address already in use :::3000

我想知道为什么和如何解决这个问题。

源码

/api/空闲时间/事件. ts

import type { NextApiRequest, NextApiResponse } from "next";
require("dotenv").config();
import app from "../../../config/slackAuth";

export default async function handler(
  req: NextApiRequest,
  res: NextApiResponse
) {
  // Unique case for Slack challenge
  if (req.body.challenge) return res.status(200).json(req.body);

  // Subscribe to 'app_mention' event in your App config
  // See https://api.slack.com/tutorials/tracks/responding-to-app-mentions
  app.event("app_mention", async ({ event, say }) => {
    try {
      // Response to the message in the thread where the event was triggered with @${message.user} 
      // See https://slack.dev/bolt-js/concepts#message-sending
      await say({
        text: `Hi <@${event.user}>!`,
        thread_ts: event.ts,
      });
    } catch (error) {
      await say({
        text: `<@${event.user}> ${error.message}.`, // @userName Request failed with status code 429.
        thread_ts: event.ts,
      });
    }
  });

  (async () => {
    // Start this app
    await app.start(process.env.PORT || 3000);
    console.log("⚡️ Bolt app is running!");
  })();

  return res.status(404).json({ message: "Unknown event type" });
}

错误代码

error - unhandledRejection: Error: listen EADDRINUSE: address already in use :::3000
    at Server.setupListenHandle [as _listen2] (net.js:1331:16)
    at listenInCluster (net.js:1379:12)
    at Server.listen (net.js:1465:7)
    at C:\Users\81906\Documents\slackGpt3\node_modules\@slack\bolt\dist\receivers\HTTPReceiver.js:176:25    
    at new Promise (<anonymous>)
    at HTTPReceiver.start (C:\Users\81906\Documents\slackGpt3\node_modules\@slack\bolt\dist\receivers\HTTPReceiver.js:142:16)
    at App.start (C:\Users\81906\Documents\slackGpt3\node_modules\@slack\bolt\dist\App.js:241:30)
    at eval (webpack-internal:///(api)/./pages/api/slack/events.ts:69:69)
    at handler (webpack-internal:///(api)/./pages/api/slack/events.ts:71:7)
    at Object.apiResolver (C:\Users\81906\Documents\slackGpt3\node_modules\next\dist\server\api-utils\node.js:363:15) {
  code: 'EADDRINUSE',
  errno: -4091,
  syscall: 'listen',
  address: '::',
  port: 3000
}