README.rst

gzip-stream

gzip-stream is a super-tiny library that will help you compress by GZIP on-the-fly.

GZIPCompressedStream class instance acting like an any other stream (in fact, GZIPCompressedStream inherits io.RawIOBase), but wraps another stream and compress it on-the-fly.

from gzip_stream import GZIPCompressedStream
from my_upload_lib import MyUploadClient

upload_client = MyUploadClient()
with open('my_very_big_1tb_file.txt') as file_to_upload:
    compressed_stream = GZIPCompressedStream(
        file_to_upload,
        compression_level=7
    )
    upload_client.upload_fileobj(compressed_stream)

GZIPCompressedStream does not read entire stream, but instead read it by chunks, until compressed output size will not satisfy read size.

AsyncGZIPDecompressedStream class can async read from another source with zlib and gzip decompression on-the-fly

# aiobotocore example

import aiobotocore

from gzip_stream import AsyncGZIPDecompressedStream

AWS_ACCESS_KEY_ID = "KEY_ID"
AWS_SECRET_ACCESS_KEY = "ACCESS_KEY"
BUCKET = "AWESOME_BUCKET"

upload_client = MyAsyncUploadClient()
session = aiobotocore.get_session()
async with session.create_client(
    service_name="s3",
    endpoint_url="s3_endpoint",
    aws_secret_access_key=AWS_SECRET_ACCESS_KEY,
    aws_access_key_id=AWS_ACCESS_KEY_ID,
) as client:
    response = await client.get_object(Bucket=BUCKET, Key='my_very_big_1tb_file.txt.gz')
    async for decompressed_chunk in GzipAsyncReaderWrapper(response["Body"])):
        await upload_client.upload_fileobj(decompressed_chunk)

Module works on Python ~= 3.5.

Installation

pip install gzip-stream

License

Public Domain: CC0 1.0 Universal.