How to upload a file to S3 and make it public using boto3?
PythonAmazon S3BotoBoto3Python Problem Overview
I am able to upload an image file using:
s3 = session.resource('s3')
bucket = s3.Bucket(S3_BUCKET)
bucket.upload_file(file, key)
However, I want to make the file public too. I tried looking up for some functions to set ACL for the file but seems like boto3 have changes their API and removed some functions. Is there a way to do it in the latest release of boto3?
Python Solutions
Solution 1 - Python
To upload and set permission to publicly-readable in one step, you can use:
bucket.upload_file(file, key, ExtraArgs={'ACL':'public-read'})
Solution 2 - Python
I was able to do it using objectAcl API:
s3 = boto3.resource('s3')
object_acl = s3.ObjectAcl('bucket_name','object_key')
response = object_acl.put(ACL='public-read')
For details: http://boto3.readthedocs.io/en/latest/reference/services/s3.html#objectacl
Solution 3 - Python
Adi's way works. However, if you were like me, you might have run into an access denied issue. This is normally caused by broken permissions of the user.
I fixed it by adding the following to the Action array:
"s3:GetObjectAcl",
"s3:PutObjectAcl"
Solution 4 - Python
In the recent versions of boto, ACL is available as a regular parameter - both when using the S3 client and resource, it seems. You can just specify ACL="public_read" without having to wrap it with ExtraParams or using ObjectAcl API.
Solution 5 - Python
Set the ACL="public-read" as mentioned above.
Also, make sure your bucket policy Resource line
has both the bare arn and /* arn formats.
Not having them both can cause strange permissions problems.
...
"Resource": ["arn:aws:s3:::my_bucket/*", "arn:aws:s3:::my_bucket"]