unable unzip password protected .gz file in GCS bucket using Python

Question

Trying to unzip password protected file in GCS but getting error in below code. Below code work fine with normal .gz files but fails to unzip password protected files.

storage_client = storage.Client()
source_bucket = 'bucket'
source_bucket1 = storage_client.bucket(source_bucket)
blob = source_bucket1.blob("path/filename.gz")
zipbytes = io.BytesIO(blob.download_as_string())
        print(zipbytes)
        if is_zipfile(zipbytes):
            with ZipFile(zipbytes, 'r') as myzip:
                for contentfilename in myzip.namelist():
                    contentfile = myzip.read(contentfilename)
                    contentfilename = contentfilename[:-3]
                    blob1 = bucket.blob(contentfilename)
                    blob1.upload_from_string(contentfile)
                    print(f'File decompressed from {zipfilename_with_path} to {contentfilename}')
        blob.delete()

Answer 1

You can use Python, e.g. from a Cloud Function:

from google.cloud import storage
    from zipfile import ZipFile
    from zipfile import is_zipfile
    import io

    def zipextract(bucketname, zipfilename_with_path):

        storage_client = storage.Client()
        bucket = storage_client.get_bucket(bucketname)

        destination_blob_pathname = zipfilename_with_path
        
        blob = bucket.blob(destination_blob_pathname)
        zipbytes = io.BytesIO(blob.download_as_string())

        if is_zipfile(zipbytes):
            with ZipFile(zipbytes, 'r') as myzip:
                for contentfilename in myzip.namelist():
                    contentfile = myzip.read(contentfilename)
                    blob = bucket.blob(zipfilename_with_path + "/" + contentfilename)
                    blob.upload_from_string(contentfile)

    zipextract("mybucket", "path/file.zip") # if the file is gs://mybucket/path/file.zip