AWS S3 deleteObject 无法使用 Node JS

Question

我已经使用 Node.js 实现了 AWS S3 SDK，以便使用签名 URL 将图像文件上传到 S3。 此功能运行良好，但我现在需要一个 function 来删除上传的 object。 我已经创建了以下代码，但它不起作用。 事实上，尽管 function 正在运行，但似乎根本没有调用 s3.deleteObject。 我是 Node 新手，所以可能犯了一个愚蠢的错误。 有人可以帮忙吗？

设置模板：

AWSTemplateFormatVersion：2010-09-09 转换：AWS::Serverless-2016-10-31 描述：S3 Uploader - 示例应用程序

Resources:
  # HTTP API
  MyApi:
    Type: AWS::Serverless::HttpApi
    Properties:
      # CORS configuration - this is open for development only and should be restricted in prod.
      # See https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-property-httpapi-httpapicorsconfiguration.html   
      CorsConfiguration:
        AllowMethods:
          - GET
          - POST
          - DELETE
          - OPTIONS
        AllowHeaders:
          - "*"   
        AllowOrigins: 
          - "*"      

  ## Lambda functions
  UploadRequestFunction:
    # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: getSignedURL/
      Handler: app.handler
      Runtime: nodejs12.x
      Timeout: 3
      MemorySize: 128
      Environment:
        Variables:
          UploadBucket: !Ref MyAppS3  
      Policies:
        - S3WritePolicy:
            BucketName: !Ref MyAppS3
        ## This permission allows the Lambda function to request signed URLs
        ## for objects that will be publicly readable. Uncomment if you want this ACL.
        - Statement:
          - Effect: Allow
            Resource: !Sub 'arn:aws:s3:::${MyAppS3}/'
            Action:
              - s3:putObjectAcl
      Events:
        UploadAssetAPI:
          Type: HttpApi
          Properties:
            Path: /uploads
            Method: get
            ApiId: !Ref MyApi  

  DeleteRequestFunction:
    # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: deleteObj/
      Handler: app.handler
      Runtime: nodejs12.x
      Timeout: 3
      MemorySize: 128
      Environment:
        Variables:
          DeleteBucket: !Ref MyAppS3  
      Policies:
        - S3WritePolicy:
            BucketName: !Ref MyAppS3
        - Statement:
          - Effect: Allow
            Resource: !Sub 'arn:aws:s3:::${MyAppS3}/'
            Action:
              - s3:putObjectAcl
      Events:
        deleteAssetAPI:
          Type: HttpApi
          Properties:
            Path: /delete
            Method: get
            ApiId: !Ref MyApi  

  ## S3 bucket
  SMyAppS3:
    Type: AWS::S3::Bucket
    Properties:
      CorsConfiguration:
        CorsRules:
        - AllowedHeaders:
            - "*"
          AllowedMethods:
            - GET
            - PUT
            - HEAD
          AllowedOrigins:
            - "*"

## Take a note of the outputs for deploying the workflow templates in this sample application
Outputs:
  APIendpoint:
    Description: "HTTP API endpoint URL"
    Value: !Sub "https://${MyApi}.execute-api.${AWS::Region}.amazonaws.com"
  S3UploadBucketName:
    Description: "S3 bucket for application uploads"
    Value: !Ref 'MyAppS3'    

删除 Object

/* 从 MyApp S3 存储桶中删除对象 */

'use strict'

const AWS = require('aws-sdk')
AWS.config.update({ region: process.env.AWS_REGION })
const s3 = new AWS.S3()

// Main Lambda entry point
exports.handler = async (event) => {
  return await deleteObj(event)
}

const deleteObj = async function(event) {
  const params = {
    Bucket: process.env.DeleteBucket, 
    Key: '66910301611586034.jpg'
  };

  s3.deleteObject(params, function(err, data) {
    if (err) {
      console.log(err, err.stack);
    } else {
      console.log('file successfully deleted');
    } 
  });
}

获得签名 Object

'use strict'

const AWS = require('aws-sdk')
AWS.config.update({ region: process.env.AWS_REGION })
const s3 = new AWS.S3()

// Change this value to adjust the signed URL's expiration
const URL_EXPIRATION_SECONDS = 300

// Main Lambda entry point
exports.handler = async (event) => {
  return await getUploadURL(event)
}

const getUploadURL = async function(event) {
  const randomID = parseInt(Math.random() * 10000000)
  const secondsSinceEpoch = Math.round(Date.now() / 1000)
  const Key = `${randomID}${secondsSinceEpoch}.jpg`

  // Get signed URL from S3
  const s3Params = {
    Bucket: process.env.UploadBucket,
    Key,
    Expires: URL_EXPIRATION_SECONDS,
    ContentType: 'image/jpeg',
    // This ACL makes the uploaded object publicly readable. You must also uncomment
    // the extra permission for the Lambda function in the SAM template.
    ACL: 'public-read'
  }

  console.log('Params: ', s3Params)
  const uploadURL = await s3.getSignedUrlPromise('putObject', s3Params)

  return JSON.stringify({
    uploadURL: uploadURL,
    Key
  })
}