Image corruption when uploading to S3 using Boto3 in Lambda

[xanderbilla]

I'm encountering an issue when uploading image files to S3 using Boto3 in a Lambda function. The uploaded image is corrupted.

Image format: JPG
S3 bucket settings: No Public Access, no specific ACLs or encryption.
Lambda environment: Python 3.12

Expected behavior: The image should be uploaded to S3 without corruption.
Actual behavior: The uploaded image is corrupted and cannot be viewed correctly.

s3 = boto3.client('s3')

postMethod = 'POST'
uploadFile = '/media/file'

def lambda_handler(event, context):
    logger.info(event)
    httpMethod = event['httpMethod']
    path = event['path']
    
    if httpMethod == postMethod and path == uploadFile:
        file_data = event['body']
        response = s3_upload_file(file_data)
    else:
        response = {
            'statusCode': 404,
            'body': json.dumps('Resource not found')
        }
    return response
        
def s3_upload_file(data):
    try:
        file_name = str(uuid.uuid4())
        response = s3.put_object(
            Body=data,
            Bucket='imggallery-st',
            Key=file_name,
            ContentType='image/jpg'
        )
        return {
            'statusCode': 200,
            'body': json.dumps('File uploaded successfully')
        }
    except ClientError as e:
        return {
            'statusCode': 500,
            'body': json.dumps(str(e))
        }

I've tried different image formats and S3 configurations without success. Any help would be appreciated.

[RyanFitzSimmonsAK]

Hi @xanderbilla, thanks for reaching out. This repository is for tracking issues that apply to multiple AWS SDKs. I've created an issue in the Boto3 repository (boto/boto3#4229) for this. Please follow-up on that issue. Thanks!

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