Streaming upload of a file directly to S3 in AWS Lambda

s3_streaming_upload.py

from botocore.vendored import requests
import boto3


def main(event, context):
    s3 = boto3.resource('s3')
    bucket = s3.Bucket('mybucket')
    destination = bucket.Object('path/to/destination')
    url = 'https://foobar.com'

    with requests.get(url, stream=True) as response:
        destination.upload_fileobj(response.raw)