Generate an S3 signed URL using Python's AWS SDK boto.

Generate only URL

If you just want to generate the URL of one item, it's easy to generate it directly from the connection.

conn = boto.connect_s3(aws_access_key_id, aws_secret_access_key)
url = conn.generate_url(expire_second, method='GET',
					    bucket='bucket_name', key='path/to/file')

Create a Bucket object and then create it

This is easier if you are looking for items in your bucket.

conn = boto.connect_s3(aws_access_key_id, aws_secret_access_key)
bucket = conn.get_bucket('bucket_name')
key = bucket.get_key('path/to/file')
url = key.generate_url(expire_second)

The whole list looks like this.

bucket = (boto.connect_s3(aws_access_key_id, aws_secret_access_key)
          .get_bucket('bucket_name'))
for key in bucket.get_all_keys():
	print(key.generate_url(60))

reference

S3 - boto online document

Generate S3 signed URL with boto

Generate only URL

Create a Bucket object and then create it

reference