aws-lambda image-resizing(node.js)

1. 먼저 front와 back 폴더 2개가 있다면 root 폴터에 lambda 폴더도 생성해준다.
2. git init (package.json이 생김)
3. git add . && git commit

$ npm install aws-sdk sharp

const AWS = require('aws-sdk');
const sharp = require('sharp');

const s3 = new AWS.S3();

exports.handler = (event, context, callback) => {
  const Bucket = event.Records[0].s3.bucket.name; // react-nodebird-s3
  const Key = decodeURIComponent(event.Records[0].s3.object.key); // original/12312312_abc.png, decodeURIComponent: 한글 깨짐현상 해결
  console.log('Bucket: ', Bucket, 'Key: ', Key);
  const filename = Key.split('/')[Key.split('/').length - 1]; // 파일이름 추출
  const ext = Key.split('.')[Key.split('.').length - 1].toLowerCase(); // 확장자 추출.toLowerCase(), 확장자 대문자를 소문자로
  const requiredFormat = ext === 'jpg' ? 'jpeg' : ext;
  console.log('filename', filename, 'ext', ext);

  try {
    const s3Object = await s3.getObject({ Bucket, Key }).promise();
    console.log('original', s3Object.Body.length);
    const resizedImage = await sharp(s3Object.Body)
      .resize(400, 400, { fit: 'inside' })
      .toFormat(requiredFormat)
      .toBuffer();
    await s3
      .putObject({
        Bucket,
        Key: `thumb/${filename}`,
        Body: resizedImage,
      })
      .promise();
    console.log('put', resizedImage.length);
    return callback(null, `thumb/${filename}`);
  } catch (error) {
    console.error(error);
    return callback(error);
  }
};

이후 Linux(Ubuntu)에서 back으로 이동한다. 아래의 명령어를 차례로 실행
--------------------------------------------------------
ubuntu@ip-000-00-00-000: ~/root/~/~/back$ sudo git pull
--------------------------------------------------------
lambda 파일로 이동
--------------------------------------------------------
ubuntu@ip-000-00-00-000: ~/root/~/~/back$ cd ../lambda
--------------------------------------------------------
ubuntu@ip-000-00-00-000: ~/root/~/~/lambda$ sudo npm i
--------------------------------------------------------
ubuntu@ip-000-00-00-000: ~/root/~/~/lambda$ sudo apt install zip
--------------------------------------------------------
ubuntu@ip-000-00-00-000: ~/root/~/~/lambda$ sudo zip -r aws-upload.zip ./*
--------------------------------------------------------
ubuntu@ip-000-00-00-000: ~/root/~/~/lambda$ ls
aws.upload.zip  index.js  node_modules  package-lock.json  package.json
--------------------------------------------------------
ubuntu@ip-000-00-00-000: ~/root/~/~/lambda$ sudo curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
--------------------------------------------------------
ubuntu@ip-000-00-00-000: ~/root/~/~/lambda$ ls
aws.upload.zip  awscliv2.zip  index.js  node_modules  package-lock.json  package.json
--------------------------------------------------------
ubuntu@ip-000-00-00-000: ~/root/~/~/lambda$ sudo unzip awscliv2.zip
--------------------------------------------------------
ubuntu@ip-000-00-00-000: ~/root/~/~/lambda$ sudo ./aws/install
--------------------------------------------------------
ubuntu@ip-000-00-00-000: ~/root/~/~/lambda$ aws

usage: aws [options] <command> <subcommand> [<subcommand> ...] [parameters]
To see help text, you can run:

  aws help
  aws <command> help
  aws <command> <subcommand> help

aws: error: the following arguments are required: command

--------------------------------------------------------
ubuntu@ip-000-00-00-000: ~/root/~/~/lambda$ aws configure
AWS Access Key ID [None]: 실제값
AWS Secret Access Key [None]: 실제값
Default region name [None]: ap-northeast-2 (aws에 설정한 나의 위치)
Default output format [None]: json
--------------------------------------------------------
ubuntu@ip-000-00-00-000: ~/root/~/~/lambda$ sudo aws s3 cp "aws-upload.zip" s3://[사용자 S3 bucket 이름]
--------------------------------------------------------

コードソースはAmazon S 3上にある

Amazon S3 링크 URL:
https://coding-factory-s3.s3.ap-northeast-2.amazonaws.com/aws-upload.zip
https://[s3_bucket_name].s3.[aws에 설정한 위치].amazonaws.com/[압축한 파일 이름]

コールバックチェック