serverless.yml

service:
  name: serverless-s3-streaming-example

package:
  individually: true

plugins:
  - serverless-webpack
  - serverless-offline

provider:
  name: aws
  runtime: nodejs10.x
  stage: ${opt:stage, 'dev'}
  profile: ${env:AWS_PROFILE, 'default'}
  region: ${self:custom.region}
  environment:
    BUCKET: ${self:custom.src_bucket}
    REGION: ${self:custom.region}
  iamRoleStatements:
    - Effect: "Allow"
      Action:
        - "s3:ListBucket"
      Resource: "arn:aws:s3:::${self:custom.src_bucket}"
    - Effect: "Allow"
      Action:
        - "s3:ListBucket"
        - "s3:GetObject"
        - "s3:DeleteObject"
      Resource: "arn:aws:s3:::${self:custom.src_bucket}/${opt:stage, self:provider.stage}/uploads/*"
    - Effect: "Allow"
      Action:
        - "s3:ListBucket"
        - "s3:DeleteObject"
        - "s3:PutObject"
      Resource: "arn:aws:s3:::${self:custom.dest_bucket}/${opt:stage, self:provider.stage}/processed/*"

functions:
  ProcessUpload:
    handler: src/handler.default
    # Adjust this timeout based on your file size
    timeout: 300                   
    events:
      - s3:
          bucket: ${self:custom.src_bucket}
          event: s3:ObjectCreated:*
          rules:
            - prefix: ${opt:stage, self:provider.stage}/uploads
          existing: true
    environment:
        DEST_BUCKET: ${self:custom.dest_bucket}
        DEST_PREFIX: ${opt:stage, self:provider.stage}/processed
        STAGE: ${opt:stage, self:provider.stage}
        DEBUG: ${self:custom.logging.${opt:stage, self:provider.stage}_debug}

custom:
  region: ${env:REGION, 'us-east-1'}
  src_bucket: ${self:service}
  dest_bucket: ${self:service}     # NOTE: This could be another bucket/path if desired
  webpack:
    webpackConfig: 'webpack.config.js'
    packager: 'yarn'
    includeModules: true
  logging:
    dev_debug: "s3-stream:*"
    prod_debug: ""