S3 Object Lambdaを試してみた

Amazon S3 Object Lambda Tutorial:
You can add your own code to process data retrieved from S3 before 
returning it to an application.

import boto3
import requests
from botocore.config import Config

# This function capitalizes all text in the original object
def lambda_handler(event, context):
    object_context = event["getObjectContext"]
    # Get the presigned URL to fetch the requested original object 
    # from S3
    s3_url = object_context["inputS3Url"]
    # Extract the route and request token from the input context
    request_route = object_context["outputRoute"]
    request_token = object_context["outputToken"]
    
    # Get the original S3 object using the presigned URL
    response = requests.get(s3_url)
    original_object = response.content.decode("utf-8")

    # Transform all text in the original object to uppercase
    # You can replace it with your custom code based on your use case
    transformed_object = original_object.upper()

    # Write object back to S3 Object Lambda
    s3 = boto3.client('s3', config=Config(signature_version='s3v4'))
    # The WriteGetObjectResponse API sends the transformed data
    # back to S3 Object Lambda and then to the user
    s3.write_get_object_response(
        Body=transformed_object,
        RequestRoute=request_route,
        RequestToken=request_token)

    # Exit the Lambda function: return the status code  
    return {'status_code': 200}

import boto3
from botocore.config import Config
session = boto3.Session(profile_name="profile-name")
s3 = session.client('s3', config=Config(signature_version='s3v4'))

def getObject(bucket, key):
    objectBody = s3.get_object(Bucket=bucket, Key=key)
    print(objectBody["Body"].read().decode("utf-8"))
    print("\\n")

print('Original object from the S3 bucket:')
# Replace the two input parameters of getObject() below with
# the S3 bucket name that you created in Step 1 and
# the name of the file that you uploaded to the S3 bucket in Step 2
getObject("demo1-2023-11-30-s3-object-lambda",
          "tutorial.txt")

print('Object transformed by S3 Object Lambda:')
# Replace the two input parameters of getObject() below with
# the ARN of your S3 Object Lambda Access Point that you saved earlier and
# the name of the file with the transformed data (which in this case is
# the same as the name of the file that you uploaded to the S3 bucket
# in Step 2)
getObject("arn:aws:s3-object-lambda:ap-northeast-1:111122223333:accesspoint/tutorial-object-lambda-accesspoint",
          "tutorial.txt")

arn:${Partition}:s3-object-lambda:${Region}:${Account}:accesspoint/${AccessPointName}