在Localstack中通过API Gateway转发请求至公共HTTP服务的问题

背景与需求 #

• 需将遗留系统集成到AWS API Gateway，先基于Localstack制作概念验证原型
• 正在快速学习AWS相关原理，使用不熟悉的Node.js编写Lambda函数

核心疑问 #

• 不确定应选择API Gateway触发Lambda转发请求至遗留系统再返回响应，还是直接使用HTTP集成方案
• 无法找到Localstack相关的实现示例，搜索结果仅为AWS控制台操作文档

当前问题与代码 #

已基于Localstack Docker容器和Serverless插件搭建基础示例（API Gateway触发Lambda返回字符串），但尝试让Lambda向测试URL（如Google）发送GET请求时，https.get()内部的console.log无输出，仅返回默认提示消息，请求未触发。

当前Lambda代码：

'use strict';
const https = require('https');

module.exports.hello = async (event) => {
    console.log("in lambda function");
    let testURL = "https://www.google.com/";
    console.log(testURL);

    let testResponse = "";
    
    https.get(testURL, (resp) => {
        console.log("In http.get");
    let data = '';

        // A chunk of data has been received.
    resp.on('data', (chunk) => {
            console.log(("get chunk"));
            data += chunk;
    });

    // The whole response has been received. Print out the result.
    resp.on('end', () => {
            console.log("response end");
            console.log(JSON.parse(data).explanation);
            testResponse = JSON.stringify(data);
    });

    }).on("error", (err) => {
        console.log("Error: " + err.message);
        testResponse = "Error: " + err.message;
    });

    // This is to make sure something correctly formatted gets returned otherwise API Gateway
    // complains about missing values. If this returns it also implies the http.get() didn't trigger
    if(testResponse == ""){
        testResponse = {
            statusCode: 200,
            body: JSON.stringify(
                {
                    message: "Didn't go through https.get?",
                    input: event,
                },
                null,
                2
            ),
    };
    }

    console.log("about to return");
    return testResponse;
}

内容的提问来源于stack exchange，提问作者Boosh_87