Configure `boto3` for R2

Example of how to configure `boto3` to use R2.

You must generate an Access Key before getting started. All examples will utilize access_key_id and access_key_secret variables which represent the Access Key ID and Secret Access Key values you generated.

You must configure boto3 to use a preconstructed endpoint_url value. This can be done through any boto3 usage that accepts connection arguments; for example:

import boto3
s3 = boto3.resource('s3',  endpoint_url = 'https://<accountid>.r2.cloudflarestorage.com',  aws_access_key_id = '<access_key_id>',  aws_secret_access_key = '<access_key_secret>'
)

You may, however, omit the aws_access_key_id and aws_secret_access_key arguments and allow boto3 to rely on the AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY environment variables instead.

An example script may look like the following:

main.pyimport boto3
s3 = boto3.resource('s3',  endpoint_url = 'https://<accountid>.r2.cloudflarestorage.com',  aws_access_key_id = '<access_key_id>',  aws_secret_access_key = '<access_key_secret>'
)

print('Buckets:')
for bucket in s3.buckets.all():  print(' - ', bucket.name)
bucket = s3.Bucket('my-bucket-name')

print('Objects:')
for item in bucket.objects.all():  print(' - ', item.key)

$ python main.py
# Buckets:
#  -  user-uploads
#  -  my-bucket-name
# Objects:
#  -  cat.png
#  -  todos.txt