Question

我是GCP的新手，有使用Python的经验。我尝试为场景编写一个Cloud Function，以解压缩GCS中的文件并将其复制到另一个存储桶。

from google.cloud import storage
import tarfile

client = storage.Client()

def untar_lookupfiles(data, context):
    # Get the file that has been uploaded to GCS
    bucket = client.get_bucket(data['Source_bucketName'])

    #copy the tarfiles to another bucket
    bucket = client.get_bucket('Target_bucketName')
    blob = bucket.blob('gs://path/to/file.name')
    blob.upload_from_filename('/path/to/source.file')

    # Untar the files
    print('Untaring Files: {}'.format(data['name']))
    untar = tarfile.open("marfiles.tar.gz", "r:gz") # filename is hard coded should be replaced with data['name']
    untar.extractall(path=dir)

但是该代码似乎缺少某些内容，有人可以帮助我使用该代码。我没有使用nodejs编写代码的经验。感谢您的帮助。

Answer 1

这是一个功能，它将解压缩放置在一个存储桶中的文件并将内容存储在另一个存储桶中：

在requirements.txt中：

google-cloud-storage

在main.py中：

import io
import os
import tarfile

from google.cloud import storage

client = storage.Client()
input_bucket = client.get_bucket('INPUT-BUCKET-NAME')
output_bucket = client.get_bucket('OUTPUT-BUCKET-NAME')


def untar(data, context):
    # Get the contents of the uploaded file
    input_blob = input_bucket.get_blob(data['name']).download_as_string()

    # Turn the upload file into a tar file
    tar = tarfile.open(fileobj=io.BytesIO(input_blob))

    # Iterate over all files in the tar file
    for member in tar.getnames():

        # Extract the individual file
        file_object = tar.extractfile(member)

        # Check if it's a file or directory (which should be skipped)
        if file_object:

            # Create a new blob instance in the output bucket
            output_blob = output_bucket.blob(os.path.join(data['name'], member))

            # Write the contents of the file to the output blob
            output_blob.upload_from_string(file_object.read())

要部署：

$ gcloud beta functions deploy test \
    --runtime python37 \
    --project PROJECT_NAME \
    --trigger-resource INPUT_BUCKET_NAME \
    --trigger-event google.storage.object.finalize

python google cloud函数解压缩文件

1 个答案: