Lambda Examples

Cointegration with S3

Lambda 작업환경에서 /tmp 만 접근 가능.(참고)

Download From S3 Bucket

import boto3
import uuid
from urllib.parse import unquote_plus
            

s3_client = boto3.client('s3')
            
def lambda_handler(event, context):
  for record in event['Records']:
    bucket = record['s3']['bucket']['name']
    key    = unquote_plus(record['s3']['object']['key'])
    tmpkey = key.replace('/', '')
    
    download_path = '/tmp/{}{}'.format(uuid.uuid4(), tmpkey)
    s3_client.download_file(bucket, key, download_path)

Uplad To S3 Bucket

import boto3
            

s3_client = boto3.client('s3')
            

def lambda_handler(event, context):
  for record in event['Records']:
    bucket = record['s3']['bucket']['name']
    key    = unquote_plus(record['s3']['object']['key'])
    tmpkey = key.replace('/', '')
    
    upload_path = '/tmp/{}'.format(tmpkey)
    s3_client.upload_file(upload_path, bucket, 'resized-{}'.format(key))

Logging

AWS Lambda function logging in Python ```python import os import logging logger = logging.getLogger() logger.setLevel(logging.INFO)

def lambda_handler(event, context): logger.info(‘## ENVIRONMENT VARIABLES’) logger.info(os.environ[‘AWS_LAMBDA_LOG_GROUP_NAME’]) logger.info(os.environ[‘AWS_LAMBDA_LOG_STREAM_NAME’]) logger.info(‘## EVENT’) logger.info(event)

START RequestId: 1c8df7d3-xmpl-46da-9778-518e6eca8125 Version: $LATEST [INFO] 2023-08-31T22:12:58.534Z 1c8df7d3-xmpl-46da-9778-518e6eca8125 ## ENVIRONMENT VARIABLES [INFO] 2023-08-31T22:12:58.534Z 1c8df7d3-xmpl-46da-9778-518e6eca8125 /aws/lambda/my-function [INFO] 2023-08-31T22:12:58.534Z 1c8df7d3-xmpl-46da-9778-518e6eca8125 2023/01/31/[$LATEST]1bbe51xmplb34a2788dbaa7433b0aa4d [INFO] 2023-08-31T22:12:58.535Z 1c8df7d3-xmpl-46da-9778-518e6eca8125 ## EVENT [INFO] 2023-08-31T22:12:58.535Z 1c8df7d3-xmpl-46da-9778-518e6eca8125 {‘key’: ‘value’} END RequestId: 1c8df7d3-xmpl-46da-9778-518e6eca8125 REPORT RequestId: 1c8df7d3-xmpl-46da-9778-518e6eca8125 Duration: 2.75 ms Billed Duration: 3 ms Memory Size: 128 MB Max Memory Used: 56 MB Init Duration: 113.51 ms XRAY TraceId: 1-5e34a66a-474xmpl7c2534a87870b4370 SegmentId: 073cxmpl3e442861 Sampled: true ```

Official Examples

Get started creating and invoking Lambda functions using an AWS SDK

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