如何使用TypeScript编写的APIGateway在VSCode中调试本地AWSLambda函数？

我们即将开始使用 Lambda 函数。
我们有必须使用 TypeScript 的技术限制。
当从 Postman 调用相关端点时，我希望能够在 VS Code 中调试我的 ts 文件。

所以，我们有以下开发环境：

• 视窗 10
• Docker for Windows（使用 Hyper-V 而不是 WSL 2）
• 打字稿 4.1
• 节点 12.17
• SAM CLI 1.13.2

我已经使用sam initHello World 模板来生成初始文件夹结构。
我已经对其进行了增强（主要基于本文）以使用 TypeScript。

文件夹结构

.
??? template.yaml
??? .aws-sam
??? .vscode
|   ??? launch.json
??? events
??? hello-world
|   ??? dist
|       ??? app.js
|       ??? app.js.map
|   ??? src  
|       ??? app.ts
|   ??? package.json
|   ??? tsconfig.json

.
??? template.yaml
??? .aws-sam
??? .vscode
|   ??? launch.json
??? events
??? hello-world
|   ??? dist
|       ??? app.js
|       ??? app.js.map
|   ??? src  
|       ??? app.ts
|   ??? package.json
|   ??? tsconfig.json

template.yaml

tsconfig.json

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: >
  LambdaWithApiGateWayDebug

  Sample SAM Template for LambdaWithApiGateWayDebug

Resources:
  HelloWorldFunction:
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: hello-world/dist
      Handler: app.lambdaHandler
      Runtime: nodejs12.x
      Events:
        HelloWorld:
          Type: Api
          Properties:
            Path: /hello
            Method: get

package.json

{
  "compilerOptions": {
    "target": "ES2020",
    "module": "commonjs",
    "sourceMap": true,
    "outDir": "./dist",
    "strict": true,
    "noImplicitAny": true,
    "esModuleInterop": true,
    "sourceRoot": "./src",
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true
  },
  "include": ["src/**/*"],
  "exclude": ["node_modules", "**/*.spec.ts"]
}

app.ts

{
  "name": "hello_world",
  "version": "1.0.0",
  "description": "hello world sample for NodeJS",
  "main": "app.js",
  "repository": "https://github.com/awslabs/aws-sam-cli/tree/develop/samcli/local/init/templates/cookiecutter-aws-sam-hello-nodejs",
  "scripts": {
    "compile": "tsc",
    "start": "sam local start-api -t ../template.yaml -p 5000 -d 5678"
  },
  "dependencies": {
    "@types/aws-lambda": "^8.10.64",
    "@types/node": "^14.14.10",
    "aws-sdk": "^2.805.0",
    "source-map-support": "^0.5.19",
    "typescript": "^4.1.2"
  }
}

app.js

import { APIGatewayProxyEvent, APIGatewayProxyResult } from "aws-lambda";

export const lambdaHandler = async (event: APIGatewayProxyEvent): Promise<APIGatewayProxyResult> => {
    const queries = JSON.stringify(event.queryStringParameters);
    return {
      statusCode: 200,
      body: `Queries: ${queries}`
    }
}

app.js.map

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.lambdaHandler = void 0;
const lambdaHandler = async (event) => {
    const queries = JSON.stringify(event.queryStringParameters);
    return {
        statusCode: 200,
        body: `Queries: ${queries}`
    };
};
exports.lambdaHandler = lambdaHandler;
//# sourceMappingURL=app.js.map

launch.json

{"version":3,"file":"app.js","sourceRoot":"./src/","sources":["app.ts"],"names":[],"mappings":";;;AAEO,MAAM,aAAa,GAAG,KAAK,EAAE,KAA2B,EAAkC,EAAE;IAC/F,MAAM,OAAO,GAAG,IAAI,CAAC,SAAS,CAAC,KAAK,CAAC,qBAAqB,CAAC,CAAC;IAC5D,OAAO;QACL,UAAU,EAAE,GAAG;QACf,IAAI,EAAE,YAAY,OAAO,EAAE;KAC5B,CAAA;AACL,CAAC,CAAA;AANY,QAAA,aAAa,iBAMzB"}

如你看到的：

• 我的 lambda 函数定义在 hello-world/src/app.ts
• 符合commonJs和ES2020 target to hello-world/dist/app.jswith sourcemap
• 该模板公开了位于hello-world/distvialocalhost:5000/hello端点下的处理程序
• 调试器正在侦听端口 5678

因此，当我调用npm run startthen 它会打印以下输出：

> hello_world@1.0.0 start C:tempAWSLambdaWithApiGateWayDebughello-world
> sam local start-api -t ../template.yaml -p 5000 -d 5678

Mounting HelloWorldFunction at http://127.0.0.1:5000/hello [GET]
You can now browse to the above endpoints to invoke your functions. You do not need to restart/reload SAM CLI while working on your functions, changes will be reflected instantly/automatically. You only need to restart SAM CLI if you update your AWS SAM template
2020-12-08 11:40:48  * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)

当我通过 Postman 向端点发出请求时，控制台会扩展为以下文本：

Mounting C:tempAWSLambdaWithApiGateWayDebughello-worlddist as /var/task:ro,delegated inside runtime container
START RequestId: 04d884cf-fa96-4d58-b41c-e4196e12de13 Version: $LATEST
Debugger listening on ws://0.0.0.0:5678/d6702717-f291-42cd-8056-22b9f029f4dd
For help, see: https://nodejs.org/en/docs/inspector

当我附上我的VS代码发送到节点过程那我只能调试app.js，而不是app.ts。
控制台日志结束：

Debugger attached.
END RequestId: 04d884cf-fa96-4d58-b41c-e4196e12de13
REPORT RequestId: 04d884cf-fa96-4d58-b41c-e4196e12de13  Init Duration: 0.12 ms  Duration: 7064.19 ms    Billed Duration: 7100 ms        Memory Size: 128 MB     Max Memory Used: 128 MB
No Content-Type given. Defaulting to 'application/json'.
2020-12-08 11:40:58 127.0.0.1 - - [08/Dec/2020 11:40:58] "GET /hello HTTP/1.1" 200 -

题

我应该改变什么才能调试我的app.ts而不是app.js？

回答