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""" | |
Copy objects from one bucket/prefix to another bucket with the same prefix. | |
Used to allow CloudFront logs to get parsed for uploading to ES *AND* analyzed | |
by WAF. | |
CloudFront Distribution logs -> s3://es-bucket/incoming -> Lambda (this) -> s3://waf-bucket/ | |
Set environment variable `destination_bucket` | |
""" | |
from __future__ import print_function | |
import json | |
import os | |
import urllib | |
import boto3 | |
print('Loading function') | |
s3 = boto3.client('s3') | |
def lambda_handler(event, context): | |
#print("Received event: " + json.dumps(event, indent=2)) | |
# Get the object from the event and show its content type | |
bucket = event['Records'][0]['s3']['bucket']['name'] | |
key = urllib.unquote_plus(event['Records'][0]['s3']['object']['key'].encode('utf8')) | |
destination_bucket = os.environ.get('destination_bucket') | |
try: | |
response = s3.get_object(Bucket=bucket, Key=key) | |
print("CONTENT TYPE: " + response['ContentType']) | |
destination_key = key | |
destination_key_parts = destination_key.split('/') | |
# strip off `/incoming` prefix | |
if destination_key_parts[0] == 'incoming': | |
destination_key = '/'.join(destination_key_parts[1:]) | |
print("Copying s3://{}/{} to s3://{}/{} ".format( | |
bucket, | |
key, | |
destination_bucket, | |
destination_key)) | |
response_copy = boto3.resource('s3').Object( | |
destination_bucket,destination_key).copy_from( | |
CopySource='{}/{}'.format(bucket, key), | |
ContentType=response['ContentType'], | |
StorageClass='STANDARD' | |
) | |
return destination_key | |
except Exception as e: | |
print(e) | |
print('Error getting object {} from bucket {}. Make sure they exist and your bucket is in the same region as this function.'.format(key, bucket)) | |
raise e |
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