aws s3 sync boto3
from pathlib import Path
from bisect import bisect_left
import boto3
class S3Sync:
"""
Class that holds the operations needed for synchronize local dirs to a given bucket.
"""
def __init__(self):
self._s3 = boto3.client('s3')
def sync(self, source: str, dest: str) -> [str]:
"""
Sync source to dest, this means that all elements existing in
source that not exists in dest will be copied to dest.
No element will be deleted.
:param source: Source folder.
:param dest: Destination folder.
:return: None
"""
paths = self.list_source_objects(source_folder=source)
objects = self.list_bucket_objects(dest)
# Getting the keys and ordering to perform binary search
# each time we want to check if any paths is already there.
object_keys = [obj['Key'] for obj in objects]
object_keys.sort()
object_keys_length = len(object_keys)
for path in paths:
# Binary search.
index = bisect_left(object_keys, path)
if index == object_keys_length:
# If path not found in object_keys, it has to be sync-ed.
self._s3.upload_file(str(Path(source).joinpath(path)), Bucket=dest, Key=path)
def list_bucket_objects(self, bucket: str) -> [dict]:
"""
List all objects for the given bucket.
:param bucket: Bucket name.
:return: A [dict] containing the elements in the bucket.
Example of a single object.
{
'Key': 'example/example.txt',
'LastModified': datetime.datetime(2019, 7, 4, 13, 50, 34, 893000, tzinfo=tzutc()),
'ETag': '"b11564415be7f58435013b414a59ae5c"',
'Size': 115280,
'StorageClass': 'STANDARD',
'Owner': {
'DisplayName': 'webfile',
'ID': '75aa57f09aa0c8caeab4f8c24e99d10f8e7faeebf76c078efc7c6caea54ba06a'
}
}
"""
try:
contents = self._s3.list_objects(Bucket=bucket)['Contents']
except KeyError:
# No Contents Key, empty bucket.
return []
else:
return contents
@staticmethod
def list_source_objects(source_folder: str) -> [str]:
"""
:param source_folder: Root folder for resources you want to list.
:return: A [str] containing relative names of the files.
Example:
/tmp
- example
- file_1.txt
- some_folder
- file_2.txt
>>> sync.list_source_objects("/tmp/example")
['file_1.txt', 'some_folder/file_2.txt']
"""
path = Path(source_folder)
paths = []
for file_path in path.rglob("*"):
if file_path.is_dir():
continue
str_file_path = str(file_path)
str_file_path = str_file_path.replace(f'{str(path)}/', "")
paths.append(str_file_path)
return paths
if __name__ == '__main__':
sync = S3Sync()
sync.sync("/temp/some_folder", "some_bucket_name")Source: stackoverflow.com