Error when deploying DialogFlow CX webhook on Google Cloud Functions: "Error: listen EADDRINUSE: address already in use :::8080"

Question

我拼命尝试为我的 DialogFlow CX 代理实现一个简单的 Webhook。以前从未这样做过，所以我只是将我在下一页找到的 index.js 和 package.json 代码复制粘贴到我的 Google 云函数：DialogFlow CX calculate values

但这似乎不起作用。尝试部署 Cloud Function 时出现错误“错误：监听 EADDRINUSE：地址已在使用 ::8080”。

如果我使用这个示例代码，也会发生同样的情况：

我做错了什么？我正在编辑代码并尝试将其直接部署在 Google Cloude Web 控制台中，而不是通过命令提示符工具。

这里有更多细节：

Google 云函数的设置： 我通过 Google 云控制台设置了一个新的 Google 云函数，点击 创建函数。我将 Region 设置为 us-east1，Trigger type 设置为 HTTP 和 允许未经身份验证的调用 。然后我保存，更新 index.js 和 package.json 如下所述，然后单击部署。结果是无法完成部署，因为 Error: listen EADDRINUSE: address already in use ::8080.

这里是我输入的代码 index.js:

'use strict';

const express = require('express');
const bodyParser = require('body-parser');
const app = express();

var port = process.env.PORT || 8080;

app.use(
    bodyParser.urlencoded({
      extended: true
    })
);
  
app.use(bodyParser.json());

app.post('/BMI', (req, res) => processWebhook4(req, res));

var processWebhook4 = function(request, response ){

    const params = request.body.sessionInfo.parameters;
    
    var heightnumber = params["height.number"];
    var weightnumber = params["weight.number"];
    var heightunit = params["height.unit-height"]
    var weightunit = params["weight.unit-weight"]
    var computedBMI;

    if (heightunit == "cm" && weightunit == "kg") { //using metric units
        computedBMI = ((weightnumber/heightnumber/heightnumber )) * 10000;
    } else if (heightunit == "in" && weightunit == "lb") { //using standard metrics
        computedBMI = ((weightnumber/heightnumber/heightnumber )) * 703;
    }

    const replyBMI = {
        'fulfillmentResponse': {
            'messages': [
                {
                    'text': {
                        'text': [
                            'This is a response from webhook! BMI is ' + computedBMI
                        ]
                    }
                }
            ]
        }
    }
    response.send(replyBMI);
}

app.listen(port, function() {
    console.log('Our app is running on http://localhost:' + port);
});

这里是我输入的代码 package.json:

{
   "name": "cx-test-functions",
   "version": "0.0.1",
   "author": "Google Inc.",
   "main": "index.js",
   "engines": {
       "node": "8.9.4"
   },
   "scripts": {
       "start": "node index.js"
   },
   "dependencies": {
       "body-parser": "^1.18.2",
       "express": "^4.16.2"
   }
}

Answer 1

您分享的 Whosebug 帖子中的代码适用于其他平台，例如 Heroku。

您遇到的错误“Error: listen EADDRINUSE: address already in use :::8080”是因为代码函数监听了8080端口，请注意您需要检查并编辑您的示例代码提供，并查看所使用的库是否在 Google Cloud Functions 中受支持（例如：express js），以及这些库是否兼容以便在 Google Cloud Functions 中使用它。

这是来自此 Whosebug Post 的 Cloud Functions 的工作代码：

exports.helloWorld = (req, res) => {
 
  const params = req.body.sessionInfo.parameters;
  
   var heightnumber = params.height.number;
   var weightnumber = params.weight.number;
   var heightunit = params.height.heightUnit;
   var weightunit = params.weight.weightUnit;
   var computedBMI;
 
  if (heightunit == "cm" && weightunit == "kg") { //using metric units
      computedBMI = ((weightnumber/heightnumber/heightnumber )) * 10000;
   } else if (heightunit == "in" && weightunit == "lb") { //using standard metrics
       computedBMI = ((weightnumber/heightnumber/heightnumber )) * 703;
   }
 
   const replyBMI = {
       'fulfillmentResponse': {
           'messages': [
               {
                   'text': {
                       'text': [
                           'This is a response from webhook! BMI is ' + computedBMI
                          
                       ]
                   }
               }
           ]
       }
 }
 res.status(200).send(replyBMI);
};

结果如下：

此外，这里还有一个示例代码，您也可以使用它在 Cloud Function 中进行部署：

index.js

exports.helloWorld = (req, res) => {
 
 let fulfillmentResponse = {
          "fulfillmentResponse": {
              "messages": [{
                  "text": {
                      "text": [
                          "This is a sample response"
                      ]
                  }
              }]
          }
  };
  res.status(200).send(fulfillmentResponse);
};

package.json

{
  "name": "sample-http",
  "version": "0.0.1"
}

部署示例代码后，您可以执行以下操作以使用 webhook：

转到管理 > Webhooks > 创建
添加显示名称和 Webhook URL（在 Cloud Functions 中触发 URL）
点击保存
转到“构建”>“流程”>“起始页”
Select 任意路由并添加 webhook
在模拟器中测试

结果应该是这样的：

Error when deploying DialogFlow CX webhook on Google Cloud Functions: "Error: listen EADDRINUSE: address already in use :::8080"

Error when deploying DialogFlow CX webhook on Google Cloud Functions: "Error: listen EADDRINUSE: address already in use :::8080"

google-cloud-functions

dialogflow-cx