Boto3 generate_presigned_url,SignatureDoesNotMatch错误

Question

client_s3 = boto3.client(
    's3',
    # Hard coded strings as credentials, not recommended.
    aws_access_key_id='XXX',
    aws_secret_access_key='XXX',
    region_name='us-east-2',
    # EDIT: Previously, I used signature_version='v4' here, but as a user here pointed out, this might not work. Regardless, I tried 's3v4' prior to trying 'v4' and neither worked for me.
    config=Config(signature_version='s3v4')
)

url = client_s3.generate_presigned_url(
    ClientMethod='get_object',
    Params={
        'Bucket': 'BUCKET_NAME',
        'Key': 'CORRECT_KEY'
    }
)

当所有使用的参数看起来都是正确的时，是什么造成了这个错误？我如何解决它？

Answer 1

boto3的文档中明确提到，该选项应该类似于config=config(Signature_version='s3v4')。v4不起作用。

这是boto3文档的一个示例。

import boto3
from botocore.client import Config

# Get the service client with sigv4 configured
s3 = boto3.client('s3', config=Config(signature_version='s3v4'))

# Generate the URL to get 'key-name' from 'bucket-name'
url = s3.generate_presigned_url(
    ClientMethod='get_object',
    Params={
        'Bucket': 'bucket-name',
        'Key': 'key-name'
    }
)

顺便说一句，US-EAST-2只允许签名Verion4，所以您不需要指定它。看这个。