如何使用 TypeScript 编写的 API Gateway 在 VS Code 中调试本地 AWS Lambda 函数?

Pet*_*ala 10 amazon-web-services node.js typescript aws-lambda aws-sam-cli

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
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template.yaml

.
??? template.yaml
??? .aws-sam
??? .vscode
|   ??? launch.json
??? events
??? hello-world
|   ??? dist
|       ??? app.js
|       ??? app.js.map
|   ??? src  
|       ??? app.ts
|   ??? package.json
|   ??? tsconfig.json
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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
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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"]
}
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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"
  }
}
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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}`
    }
}
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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
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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"}
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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:\temp\AWS\LambdaWithApiGateWayDebug\hello-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)
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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:\temp\AWS\LambdaWithApiGateWayDebug\hello-world\dist 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
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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 -
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我应该改变什么才能调试我的app.ts而不是app.js

Jor*_*tas 5

我写了一篇中等文章,解释了如何创建、调用和调试 TypeScript lambda 函数。请查看以下链接了解更多详情。

要求

1-创建一个nodejs12x;

  1. 创建一个 nodejs12x lambda;

  2. 安装打字稿: npm i -g typescript

  3. 初始化打字稿:(tsc --init它将创建 tsconfig.json 文件)

  4. 将创建的 tsconfig.json 文件替换为以下代码:

    {
    "compilerOptions": {
    "module": "CommonJS",
    "target": "ES2017",
    "noImplicitAny": true,
    "preserveConstEnums": true,
    "outDir": "./built",
    "sourceMap": true
    },
    "include": ["handler/**/*"],
    "exclude": ["node_modules", "**/*.spec.ts"]
    }
    
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  5. 删除 app.js 文件;

  6. 在处理程序文件夹内的 TypeScript 代码中创建您的 lambda(您需要创建它):

    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}`
      }
    }
    
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  7. 调整模板.yaml。更改 lambda 的 CodeUri 路径:CodeUri: hello-world/built

  8. 安装所需的节点包: npm install typescript @types/aws-lambda @types/node -save-dev

  9. 包json:

    {
    "name": "typescript_lambda",
    "version": "1.0.0",
    "description": "hello world sample for TypeScript",
    "main": "app.js",
    "repository": "https://github.com/jafreitas90/AWS",
    "author": "Jorge Freitas",
    "license": "JorgeFreitas Ltd :)",
    "dependencies": {
    },
    "scripts": {
      "compile": "tsc"
    },
    "devDependencies": {
      "@types/aws-lambda": "^8.10.71",
      "@types/node": "^14.14.22",
      "aws-sdk": "^2.815.0",
      "typescript": "^4.1.3"
    }
    }
    
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  10. 安装

  11. npm 运行编译

  12. 在 lambda 函数(TypeScript 代码)中设置断点。在左侧面板上选择调试,然后开始调试(顶部的绿色按钮)。就是这样:)

  13. 项目结构

在此处输入图片说明

请在我的教程中找到更多详细信息。

源代码


Pet*_*ala 3

事实证明我犯了两个小错误:

源根

我已经sourceRoot在里面设置了tsconfig.json,在这种情况下是不必要的。include足够的:

{
  "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"]
}
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断点

我设置了两个断点:一个在 inside app.js,另一个在 inside app.ts
事实证明,如果app.js确实有一个断点,那么另一个断点将不会被触发。

调试js

因此,在我删除断点之后,app.js调试器停止在app.ts.

调试ts