Getting started with secure AWS CloudFront streaming with Python

Question

I have created a S3 bucket, uploaded a video, created a streaming distribution in CloudFront. Tested it with a static HTML player and it works. I have created a keypair thro

Answer 1

In Python, what's the easiest way of generating an expiring URL for a file. I have boto installed but I don't see how to get a file from a streaming distribution.

You can generate a expiring signed-URL for the resource. Boto3 documentation has a nice example solution for that:

import datetime

from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.primitives.asymmetric import padding
from botocore.signers import CloudFrontSigner


def rsa_signer(message):
    with open('path/to/key.pem', 'rb') as key_file:
        private_key = serialization.load_pem_private_key(
            key_file.read(), 
            password=None,
            backend=default_backend()
        )
    signer = private_key.signer(padding.PKCS1v15(), hashes.SHA1())
    signer.update(message)
    return signer.finalize()

key_id = 'AKIAIOSFODNN7EXAMPLE'
url = 'http://d2949o5mkkp72v.cloudfront.net/hello.txt'
expire_date = datetime.datetime(2017, 1, 1)

cloudfront_signer = CloudFrontSigner(key_id, rsa_signer)

# Create a signed url that will be valid until the specfic expiry date
# provided using a canned policy.
signed_url = cloudfront_signer.generate_presigned_url(
    url, date_less_than=expire_date)
print(signed_url)