AWS Lambda 由于缺少 index.mjs 而出现“无法找到模块 lambda”

Question

我正在尝试通过无服务器框架的

sls deploy

命令部署我的 lambda 函数。部署进行得很顺利，但是当 lambda 运行时，我收到以下错误。

{
    "errorType": "Runtime.ImportModuleError",
    "errorMessage": "Error: Cannot find module 'lambda'\nRequire stack:\n- /var/runtime/index.mjs",
    "stack": [
        "Runtime.ImportModuleError: Error: Cannot find module 'lambda'",
        "Require stack:",
        "- /var/runtime/index.mjs",
        "    at _loadUserApp (file:///var/runtime/index.mjs:1087:17)",
        "    at async UserFunction.js.module.exports.load (file:///var/runtime/index.mjs:1119:21)",
        "    at async start (file:///var/runtime/index.mjs:1282:23)",
        "    at async file:///var/runtime/index.mjs:1288:1"
    ]
}

我的

src

或

build

文件夹中没有任何 index.mjs 文件，因此我不确定下一步要做什么来解决此问题。我在这里和其他地方遇到了一些类似的问题，但这些解决方案实际上都不适合我。

我的项目文件夹结构

我的

Serverless.yml

文件

service: api-gateway-websocket-poc
frameworkVersion: '3'

provider:
  name: aws
  runtime: nodejs18.x
  stage: ${opt:stage, 'dev'}
  region: ${opt:region, 'us-east-2'}
  websocketsApiName: api-gateway-ws-poc-${self:provider.stage}
  websocketsApiRouteSelectionExpression: $request.body.action
  websocketsDescription: API Gateway WS POC
  iamRoleStatements:
    - Effect: Allow
      Action:
        - "execute-api:ManageConnections"
      Resource:
        - "arn:aws:execute-api:*:*:**/@connections/*"

functions:
  connectionHandler:
    handler: src/lambda.handler
    events:
      - websocket:
          route: $connect
      - websocket:
          route: $disconnect
  defaultHandler:
    handler: src/lambda.handler
    events:
      - websocket:
          route: $default
  actionHandler:
    handler: src/lambda.handler
    events:
      - websocket:
          route: myAction

我的

lambda.ts

文件

import * as AWS from 'aws-sdk';
import { APIGatewayProxyHandler, APIGatewayProxyResult } from "aws-lambda";
  
export const handler: APIGatewayProxyHandler = async (
  event,
  context,
  callback
): Promise<APIGatewayProxyResult> => {
  
  console.log("on send message", event.requestContext.connectionId, event.requestContext.routeKey, event.body);

  const {
    routeKey,
    connectionId,
    domainName,
    stage
  } = event.requestContext;

  
  return { statusCode: 200, body: 'Data sent.' };
};

我的

tsconfig.json

{
  "compilerOptions": {
    "composite": true,                                /* Enable constraints that allow a TypeScript project to be used with project references. */
    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "module": "commonjs",                                /* Specify what module code is generated. */
    "rootDir": "./src",                                  /* Specify the root folder within your source files. */
    "allowJs": true,                                  /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */
    "outDir": "./build",                                   /* Specify an output folder for all emitted files. */
    "esModuleInterop": true,                             /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
    "forceConsistentCasingInFileNames": true,            /* Ensure that casing is correct in imports. */
    "strict": true,                                      /* Enable all strict type-checking options. */
    "skipLibCheck": true                                 /* Skip type checking all .d.ts files. */
  }
}

包.json

{
  "name": "api-gateway-websocket-poc",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "dev": "nodemon src/app.ts",
    "start": "tsc && node build/app",
    "build": "npm run clearBuild && npm run tsc",
    "clearBuild": "npm run rimraf -- build",
    "rimraf": "rimraf",
    "tsc": "tsc"
  },
  "dependencies": {
    "express": "^4.18.2",
    "serverless-http": "^3.1.1"
  },
  "devDependencies": {
    "@types/aws-lambda": "^8.10.137",
    "@types/express": "^4.17.21",
    "@types/node": "^20.12.11",
    "aws-sdk": "^2.1617.0",
    "nodemon": "^3.1.0",
    "rimraf": "^5.0.5",
    "serverless": "^3.38.0",
    "ts-node": "^10.9.2",
    "typescript": "^5.4.5"
  }
}

我正在通过简单的操作从本地计算机部署它

SLS_DEBUG=* serverless deploy --stage dev --region us-east-2

我试图了解 index.mjs 文件的来源，或者我是否需要在部署到 AWS 之前更改自己的模式。

Answer 1

1. 将以下内容添加到

   package.json

   /安装以下pkg：

"serverless-plugin-typescript"

2. 将以下内容添加到

   serverless.yml

   文件：

plugins:
  - serverless-plugin-typescript

上述 2 个更改应该可以解决该错误