使用Boto 3将文件从AWS S3传输到SFTP [英] Transfer file from AWS S3 to SFTP using Boto 3

问题描述

我是使用Boto3的初学者，我想将文件从S3存储桶直接传输到SFTP服务器.

I am a beginner in using Boto3 and I would like to transfer a file from an S3 bucket to am SFTP server directly.

我的最终目标是为AWS Glue编写Python脚本.

My final goal is to write a Python script for AWS Glue.

我找到了一些文章，展示了如何将文件从SFTP传输到S3存储桶:
https://medium.com/better-programming/transfer-file-from-ftp-server-to-a-s3-bucket-using-python-7f9e51f44e35

I have found some article which shows how to transfer a file from an SFTP to an S3 bucket:
https://medium.com/better-programming/transfer-file-from-ftp-server-to-a-s3-bucket-using-python-7f9e51f44e35

不幸的是，我找不到任何相反的动作.您有什么建议/想法吗?

Unfortunately I can't find anything which does the opposite action. Do you have any suggestions/ideas?

我的第一个错误尝试是在下面.

My first wrong attempt is below.

但是我要避免将文件下载到本地内存中，然后再将其移动到SFTP.

But I would like to avoid downloading while file to my local memory in order to move it then to SFTP.

import pysftp
import boto3

# get clients
s3_gl = boto3.client('s3', aws_access_key_id='', aws_secret_access_key='')

# parameters
bucket_gl = ''
gl_data = ''
gl_script = ''

source_response = s3_gl.get_object(Bucket=bucket_gl,Key=gl_script+'file.csv')
print(source_response['Body'].read().decode('utf-8'))

#---------------------------------

srv = pysftp.Connection(host="", username="", password="")

with srv.cd('relevant folder in sftp'): 
    srv.put(source_response['Body'].read().decode('utf-8')) 

# Closes the connection
srv.close()

推荐答案

直接传输..."可以表示许多不同的事物.

"transfer ... directly" can mean number of different things.

让我们假设您想通过本地计算机(运行Python代码的地方)传输文件，而没有实际将文件的临时副本存储到本地文件系统中.

Let's assume that you want to transfer the file via the local machine (where the Python code runs), without actually storing a temporary copy of the file to the local file system.

对于SFTP上传，您可以使用 Paramiko库.

For SFTP upload, you can use Paramiko library.

假设您已经拥有 Paramiko SFTPClient (sftp)和Boto 3 client(s3)实例就绪(问题链接的文章中对此进行了介绍)，您可以简单地胶粘"使用类似文件的对象将它们一起使用:

Assuming you already have your Paramiko SFTPClient (sftp) and Boto 3 client (s3) instances ready (what is covered in the article you have linked in your question), you can simply "glue" them together using file-like objects:

with sftp.open('/sftp/path/filename', 'wb', 32768) as f:
    s3.download_fileobj('mybucket', 'mykey', f)

出于32768参数的目的，请参见在使用pysftp"open"打开的SFTP服务器上写入文件;方法很慢 .

For the purpose of the 32768 argument, see Writing to a file on SFTP server opened using pysftp "open" method is slow.

这篇关于使用Boto 3将文件从AWS S3传输到SFTP的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！